Articoli di riviste: "Organic nano-Coating"

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JHA, BRAJESH KUMAR, MANISH K. BHADU e A. S. KHANNA. "HIGH-PERFORMANCE NANO-ALUMINA-GRAFTED WATERBORNE POLYURETHANE COATING". International Journal of Nanoscience 10, n. 04n05 (agosto 2011): 1119–24. http://dx.doi.org/10.1142/s0219581x11009520.

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Organic–inorganic hybridization technique is the recent trend to increase the performance of conventional organic coatings. In this work inorganic nano- Al2O3 was incorporated in organic waterborne polyurethane conventional coating (PUA) and applied on mild steel. The problem of lack of interfacial interaction between inorganic nanoreinforcement (nano- Al2O3 ) and organic matrix, agglomeration of high surface energetic nano- Al2O3 within the coating need to be solved. In order to obtain stable hybrid coating the organic bi-functional polymers, methyltrimethoxysilane (MTMS) and 3-glycidoxy-propyltriethoxysilane (GPTMS) were grafted on the surface of nano- Al2O3 and dispersed in PU coating by ultrasonication which were designated as PUM and PUG respectively. AFM analysis indicates that the grafting of nano- Al2O3 significantly reduces the agglomeration problems as well as root mean square surfaces roughness (Rq) of coating. Immersion studies conducted in 3.5 wt.% NaCl solution showed that the dielectric properties (polarization resistance) increases and corrosion rate decreases significantly with grafted coatings as measured by electrochemical technique. The mechanical properties of PUG and PUM hybrid coating showed the much better performance than waterborne Polyurethane (PU) coating.

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Hao, Bao Hong, Yu Xue Cheng, Hang Li, Peng Fei Pan e Wei Wang. "The Analysis of “Super Extension” Behavior and “Self-Cleaning” Mechanism for Anti-Rust Nano-Composite Coating of Reinforcement". Advanced Materials Research 893 (febbraio 2014): 190–93. http://dx.doi.org/10.4028/www.scientific.net/amr.893.190.

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This paper introduces the innovation of adding inorganic nano additive into the organic anti-rust coating and the development of “organic-inorganic nano-composite coating”, which can be used to realize the effective coverage of reinforcement surface by utilizing “self repair” function and “super extension” behavior of nano materials to remedy the defect for severe corrosion of general organic coating caused by the uneven painting.

3

Du, Weiping, Yingying Ding, Yang Zhang e Huifang Chen. "Preparation of Surface-Modified Nano Zinc Sulfide/Polyurethane Inorganic-Organic Transparent Coating and Its Application in Resin Lens". Coatings 11, n. 8 (26 luglio 2021): 894. http://dx.doi.org/10.3390/coatings11080894.

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The surface modified hydrophilic zinc sulfide nano powder was prepared by hydrothermal method, and the corresponding zinc sulfide/polyurethane organic-inorganic composite transparent coating via in-situ polymerization. The structure of ZnS Nanoparticles and organic-inorganic composite coating were characterized by Infrared Spectroscopy, X-Ray Diffraction, Laser Particle Size Analyzer and Scanning Electron Microscopy. The optical properties were measured by Ultraviolet-Visible spectrophotometer and ellipsometry. The results show that the monodisperse hydrophilic nano zinc sulfide powder with a particle size of about 70 nm can be obtained by thioglycolic acid (TGA) modification, which has good compatibility with waterborne polyurethane. Nano zinc sulfide increased the refractive index of the coating significantly and the refractive index of the coatings could be controlled in the region of 1.46–1.71 organic-inorganic composite coating by adding ZnS. When the amount of nano ZnS added was 30%, the refractive index of the hybrid coating can reach 1.71, and the transmittance was more than 90%. The cured coatings were smooth and no agglomeration between nano ZnS particles could be found. After application on the surfaces of resin lens, the coatings presented better impact resistance, which indicated that the coating has application prospects in the field of fine processing of lens’ surfaces.

4

Zhong, Yongqiang. "Research on Mechanical Properties of Nano-modified Epoxy Resin Color Anti-skid pavement Materials". E3S Web of Conferences 233 (2021): 01097. http://dx.doi.org/10.1051/e3sconf/202123301097.

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By referring to the domestic and foreign researches on color anti-skid pavement, the composition of epoxy resin coating material for color antiskid pavement is designed. The purpose of the experiment is to analyze the effect of nano-modified epoxy resin coating by adding 2.5% nano-organic montmorillonite modifier to the existing color anti-skid pavement surface material. Test and compare the change of mechanical properties of nano-modified epoxy resin coating binder before and after nano-modified. Then the effect of nano-modification is analyzed.

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Zang, Jiawei, Chonggen Pan, Xu Li, Keyu Chen e Danting Chen. "Research on Salt Corrosion Resistance of Lithium-Based Protective Coating on Mortar Substrate". Materials 16, n. 9 (29 aprile 2023): 3463. http://dx.doi.org/10.3390/ma16093463.

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The present study concerns hydrophobic surface treatments with silane-based coating on concrete surfaces against external ionic transport. The nano-modification and organic–inorganic modification were carried out on it and applied to the mortar matrix and concrete matrix. Lithium-based protective coating (PC1, PC2), nano-modified coating (NC1, NC2) and organic–inorganic composite coating (OL1) were prepared. The salt erosion resistance of the mortar matrix and concrete matrix was tested, compared with the blank group and the market. The test results found that the organic–inorganic modified OL1 and LC1 coatings have the greatest influence on the chloride penetration resistance of the mortar matrix, in which the chloride penetration depth of 28 days is reduced by 73.03% and 63.83%, respectively, compared with the blank group. The rate of mass change of the blank group, PC1 and PC2 coatings, and NL1 and NL2 coatings were 0.17%, 0.08%, and 0.03%, respectively. The result demonstrated that the lithium-based coating could effectively delay the penetration rate of chloride ions and sulfates into the mortar, and the nano-modified properties could improve the salt resistance. The scanning electron microscopy (SEM) showed that coating treatment would promote the secondary hydration of cement-based materials, by reducing the content of Ca(OH)2 in hydration products of cement-based materials and producing C-S-H gel, which is conducive to strength enhancement and pore refinement. The nano-component would promote the reaction degree, while the organic–inorganic coating would have the respective advantages of the two components.

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Wu, Guoqing, Xiaoping Chen, Xuanyu Xie, Pu Zhang, Shenyu Ge, Wei Chen, Xian Zeng e Ruoye Wang. "Research on Hard, Transparent and Hydrophobic Coating on PMMA Sheet". Applied Sciences 12, n. 24 (16 dicembre 2022): 12927. http://dx.doi.org/10.3390/app122412927.

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In this paper, nano SiO2 particles modified organic silane coatings were successfully prepared to aim at the application of the self-cleaning coating on PMMA substrate for deep-sea optical windows. The chemicals, surface microstructure, wettability, hardness, adhesion, transparency, water scouring resistance as well as microorganism attachment rate of the coatings were investigated. The results showed that adding SiO2 nanoparticles into the organic silicon coating can effectively improve the hydrophobicity due to generating a micro-nano structure surface. However, excessive addition would result in a decrease in hydrophobicity, adhesion, as well as transparency, due to the inorganic SiO2 particle destroying the integrity of the organic coating. The optimal coating was obtained by adding 0.5 wt% nano SiO2 particles, which possessed a water contact angle of 114.2°, hardness of 4H, adhesion level of 0, and visible light transmittance of 0.886. After 40-h water scouring, the water contact angle decreased to 108.3° and the visible light transmittance decreased to 0.839, suggesting good water scouring resistance. The microorganism attachment rate of the S05 coating was 0.17% after a 6 h immersion test, which was about half that of the PMMA substrate.

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He, Jian Yun, Jin Ping Xiong e Bing Qian Xia. "UV-Curable Organic-Inorganic Hybrid Films Based on Epoxynorbornene Linseed Oils". Advanced Materials Research 217-218 (marzo 2011): 294–99. http://dx.doi.org/10.4028/www.scientific.net/amr.217-218.294.

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Epoxynorbornene linseed oil (ENLO) is a new kind of epoxide from renewable sources. An UV-curable organic/inorganic hybrid films using epoxynorbornene linseed oils (ENLO) and surface treated nano-silica were formulated. The mechanical properties，thermal properties and coating properties of the ENLO /silica coatings were evaluated as the function of nano-silica content. The results indicated that after incorporating the nano-silica, the strength, modulus and glass transition temperature of the hybrid films enhanced, while the elongation at break decreased. The nano-silica also improved the hybrid coating properties such as pencil hardness, solvent resistance and surface wetting properties. The morphology observation of the films by atomic force microscopy (AFM) showed that the average silica particle size was ~ 70 nm and the particles were well-dispersed in the organic phase.

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Qiang Yang, Qiang Yang, Wei Gong Wei Gong, Xiaowei Cui Xiaowei Cui e Chunsheng Zhou Chunsheng Zhou. "Functionalization of Cellulose Paper by Coating Nano Metal-Organic Frameworks for Use as Photochromic Material". Journal of the chemical society of pakistan 43, n. 1 (2021): 67. http://dx.doi.org/10.52568/000548.

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The cellulose paper-based functional materials modified by Zn-NDI and Cu-NDI were prepared by the coating method. The chemical structures were characterized by FTIR, XRD, UV-vis and SEM, and the photochromic properties of the composite functional materials were studied. The results showed that Zn-NDI and Cu-NDI were successfully prepared and retained on the surface of copy paper, the wavelength of photochromic reaction is between 300-400 nm of MOFs materials. Optical analysis confirmed that the NDI/paper, Zn-NDI/paper and Cu-NDI/paper changed from tan to wheat, light green to olive, and dark tan to brown after 60 seconds of exposure to hernia light irradiations, the MOFs coated paper returned to its original color when it was placed in the dark for 4 hours. The above results indicated that the prepared Zn-NDI and Cu-NDI coated paper composites exhibited excellent photochromic ability and had potential applications in the field of anti-counterfeiting packaging materials.

9

Qiang Yang, Qiang Yang, Wei Gong Wei Gong, Xiaowei Cui Xiaowei Cui e Chunsheng Zhou Chunsheng Zhou. "Functionalization of Cellulose Paper by Coating Nano Metal-Organic Frameworks for Use as Photochromic Material". Journal of the chemical society of pakistan 43, n. 1 (2021): 67. http://dx.doi.org/10.52568/000548/jcsp/43.01.2021.

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The cellulose paper-based functional materials modified by Zn-NDI and Cu-NDI were prepared by the coating method. The chemical structures were characterized by FTIR, XRD, UV-vis and SEM, and the photochromic properties of the composite functional materials were studied. The results showed that Zn-NDI and Cu-NDI were successfully prepared and retained on the surface of copy paper, the wavelength of photochromic reaction is between 300-400 nm of MOFs materials. Optical analysis confirmed that the NDI/paper, Zn-NDI/paper and Cu-NDI/paper changed from tan to wheat, light green to olive, and dark tan to brown after 60 seconds of exposure to hernia light irradiations, the MOFs coated paper returned to its original color when it was placed in the dark for 4 hours. The above results indicated that the prepared Zn-NDI and Cu-NDI coated paper composites exhibited excellent photochromic ability and had potential applications in the field of anti-counterfeiting packaging materials.

10

Qiang Yang, Qiang Yang, Wei Gong Wei Gong, Xiaowei Cui Xiaowei Cui e Chunsheng Zhou Chunsheng Zhou. "Functionalization of Cellulose Paper by Coating Nano Metal-Organic Frameworks for Use as Photochromic Material". Journal of the chemical society of pakistan 43, n. 1 (2021): 67. http://dx.doi.org/10.52568/000007.

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The cellulose paper-based functional materials modified by Zn-NDI and Cu-NDI were prepared by the coating method. The chemical structures were characterized by FTIR, XRD, UV-vis and SEM, and the photochromic properties of the composite functional materials were studied. The results showed that Zn-NDI and Cu-NDI were successfully prepared and retained on the surface of copy paper, the wavelength of photochromic reaction is between 300-400 nm of MOFs materials. Optical analysis confirmed that the NDI/paper, Zn-NDI/paper and Cu-NDI/paper changed from tan to wheat, light green to olive, and dark tan to brown after 60 seconds of exposure to hernia light irradiations, the MOFs coated paper returned to its original color when it was placed in the dark for 4 hours. The above results indicated that the prepared Zn-NDI and Cu-NDI coated paper composites exhibited excellent photochromic ability and had potential applications in the field of anti-counterfeiting packaging materials.

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Abrahimi, Farkhondeh, Mansour Taghvaei e Andrea Mastinu. "Nano-Organic Coatings Improve Early Vigor of Brassica napus L. Seeds in Water Deficit". Agronomy 13, n. 2 (28 gennaio 2023): 390. http://dx.doi.org/10.3390/agronomy13020390.

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Low emergence and vigor of canola seeds are common problems encountered by canola growers. Seed coating is a good way to solve this problem. The objective of this study was to find the best combination of nano-organic to be used as a coating for seeds for strengthening the absorption of water and emergence seed of low vigor canola. The treatments in the first experiment included six levels of organic coatings: 20% vermicompost with 80% bentonite, 30% vermicompost with 70% bentonite, 40% vermicompost with 60% bentonite, 40% residues of canola with 60% bentonite, 30% residues of canola with 70% bentonite, and 20% resides of canola with 80% bentonite. The results indicated that 20% residues of canola and 20% vermicompost had the highest moisture under the saturation conditions and kept moisture for a longer time. Subsequently, the factors of the second experiment included three levels of water stress (100, 75, and 50% field capacity (FC)), three levels of seed coating (control, vermicompost, and canola residues), and three levels of titanium dioxide nanoparticles (0, 0.5, and 1 mM). The results showed that nano-organic coating improved emergence percentage and seedling traits while increasing superoxide dismutase, peroxidase, and catalase activities and decreasing electrolyte leakage. The highest ratios for emergence percentage (74.67), seedling vigor index (264.58), and leaf area (418) were obtained at the highest level of nano-titanium (1 mM). The highest rates of superoxide dismutase (53.44), peroxidase (30.68), catalase (5.35), chlorophyll content (51.05), and lowest electrolyte leakage (42.39) were observed in the highest level of nano-titanium (1 mM). Based on the results, we suggest the use of rapeseed residues with nano titanium oxide for rapeseed coating. The use of nanoparticles in current seed coatings is useful for reducing stresses in the germination and emergence stages.

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Gu, Yunqing, Ke Xia, Denghao Wu, Jiegang Mou e Shuihua Zheng. "Technical Characteristics and Wear-Resistant Mechanism of Nano Coatings: A Review". Coatings 10, n. 3 (3 marzo 2020): 233. http://dx.doi.org/10.3390/coatings10030233.

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Nano-coating has been a hot issue in recent years. It has good volume effect and surface effect, and can effectively improve the mechanical properties, corrosion resistance and wear resistance of the coatings. It is important to improve the wear resistance of the material surface. The successful preparation of nano-coatings directly affects the application of nano-coatings. Firstly, the preparation methods of conventional surface coatings such as chemical vapor deposition and physical vapor deposition, as well as the newly developed surface coating preparation methods such as sol-gel method, laser cladding and thermal spraying are reviewed in detail. The preparation principle, advantages and disadvantages and the application of each preparation method in nano-coating are analyzed and summarized. Secondly, the types of nano-coating materials are summarized and analyzed by inorganic/inorganic nanomaterial coatings and organic/inorganic nanomaterial coatings, and their research progress is summarized. Finally, the wear-resistant mechanism of nano-coatings is revealed from three aspects: grain refinement, phase transformation toughening mechanism and nano-effects. The application prospects of nano-coatings and the development potential combined with 3D technology are prospected.

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Li, Shasha, Jinchao Yang, Huayu Zhao, Xinan Cai, Benben Yang e Yufeng Lu. "The Role of Stainless Steel Flakes Epoxy Intermediate Nano-coating in the Heavy-duty Nano Organic Coating System". IOP Conference Series: Materials Science and Engineering 394 (7 agosto 2018): 022072. http://dx.doi.org/10.1088/1757-899x/394/2/022072.

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Liu, Yanze. "Research on a Superhydrophobic Coating of Highly Transparent Wear-Resistant Inorganic/Organic Silicon Composite Resin". Coatings 11, n. 3 (16 marzo 2021): 338. http://dx.doi.org/10.3390/coatings11030338.

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Transparent superhydrophobic materials can be used in car glass, curtain walls, mobile phone screens, and other items. However, the hydrophobicity, transparency, and abrasion resistance of the transparent superhydrophobic coating are mutually restricted, and it is difficult to prepare transparent superhydrophobic coating with good performance. In this article, taking the mobile phone screen transparent coating as the research object, the inorganic silicon resin crystal coating as the main material, and the organic silicon resin as the binder and the hardness regulator, with the addition of the hydrophobically modifying nano silica particles, a high-transparent, wear-resistant, and superhydrophobic coating is researched. Experiments showed that when the composition mass ratio of SJ-32F resin to 9825 resin is 9:1 and the mass ratio of modified nano silica is 1.7%, the coating has a hardness of 3H–4H suitable for mobile phone screens, the contact angle of the coating can reach more than 150°, the rolling angle is less than 10°, and the light transmittance of the coating remains high at 91–95%. The cross-hatch adhesion strength of the coating reaches 5B, and the average adhesion strength measured by the adhesion pull tester is about 5.4 MPa. When the rubbing times reached 100, the light transmittance of the coating remained above 80%, and the contact angle remained basically unchanged.

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Ji, Yaxiong, Xing Rong, Hong Zhong, Yuanhao Wang, Shifeng Wang e Lin Lu. "Making Marble Powder Waste Profitable by Using Nano-TiO2 Surface Modification for Air Quality Improvement Applications". Journal of Nanomaterials 2017 (10 dicembre 2017): 1–6. http://dx.doi.org/10.1155/2017/6501793.

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We report a brand new recycling route of waste marble powder, by means of surface modification with homemade nano-TiO2 particles to produce low cost coating materials for the application in air quality improvement. The as-prepared nano-TiO2 in anatase phase exhibits excellent photocatalytic characteristic, reflected by the high degradation rate of over 95% of methylene blue within 6 hours of UV irradiation. The prepared coating consisting of nano-TiO2 clad marble powder was tested by monitoring the decomposition rate of formaldehyde gas. A high degradation efficiency of about 95% within 9 hours of illumination is achieved, demonstrating a promising potential for removing the harmful and toxic organic pollutants in air while applying this coating in buildings both interiorly and exteriorly.

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Alimagham, Farah, Max Platkov, Joshua Prestage, Svetlana Basov, Gregory Izakson, Abraham Katzir, Stephen R. Elliott e Tanya Hutter. "Mid-IR evanescent-field fiber sensor with enhanced sensitivity for volatile organic compounds". RSC Advances 9, n. 37 (2019): 21186–91. http://dx.doi.org/10.1039/c9ra04104d.

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Frigione, Mariaenrica, e Mariateresa Lettieri. "Novel Attribute of Organic–Inorganic Hybrid Coatings for Protection and Preservation of Materials (Stone and Wood) Belonging to Cultural Heritage". Coatings 8, n. 9 (10 settembre 2018): 319. http://dx.doi.org/10.3390/coatings8090319.

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In order to protect a material belonging to Cultural Heritage (i.e., stone, wood) from weathering, and in turn to preserve its beauty and historical value for the future generations, the contact with external harmful agents, particularly water, must be avoided, or at least limited. This task can be successfully obtained with the use of a protective organic coating. The use of nano-metric reinforcing agents in conventional polymeric coatings demonstrated to be a successful route in achieving better protective performance of the films and improved physical properties, even in extreme environments. The present paper would, therefore, review the more recent findings in this field. Generally speaking, when a hydrophobic product is applied on its surface, the stone material will absorb less water and consequently, less substances which may be harmful to it. An efficient organic coating should also supply wear and abrasion resistance, resistance to aggressive chemicals, excellent bond to the substrate; finally, it should be also able to guarantee vapor exchange between the environment and the material interior, i.e., the material should keep the same water vapor permeability as if it was un-protected. To regard to the conservation of wood artifacts, protective treatments for wood will preserve the material from environmental agents and biological attack. Hence, potential advantages of hybrid (organic–inorganic) nano-composite coatings for stone/wood have been found to be: Enhanced mechanical properties in comparison to the pure polymeric matrix, due to the reinforcing effect of the nano-filler; superior barrier properties (the presence of the nano-filler hinders the ingress of water and/or potentially harmful chemicals); optical clarity and transparency. It has been found that the efficacy of a nano-filled coating strongly depends on the effectiveness of the method used to uniformly disperse the nano-filler in the polymeric matrix. Furthermore, the presence of nano-particles should not impair the viscosity of the organic matrix, in order to employ the conventional techniques of application for coatings.

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Zhang, Guoliang, Jiaheng Zhang, Pengcheng Su, Zehai Xu, Wanbin Li, Chong Shen e Qin Meng. "Non-activation MOF arrays as a coating layer to fabricate a stable superhydrophobic micro/nano flower-like architecture". Chemical Communications 53, n. 59 (2017): 8340–43. http://dx.doi.org/10.1039/c7cc03409a.

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JU, JEONG-HUN, YOUNG-MIN CHUNG, YU-RIM BAK, MOON-JIN HWANG e KWANG-SUN RYU. "THE EFFECTS OF CARBON NANO-COATING ON Li(Ni0.8Co0.15Al0.05)O2 CATHODE MATERIAL USING ORGANIC CARBON FOR Li-ION BATTERY". Surface Review and Letters 17, n. 01 (febbraio 2010): 51–58. http://dx.doi.org/10.1142/s0218625x1001376x.

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Carbon nano-coated LiNi 0.8 Co 0.15 Al 0.05 O 2/ C (LNCAO/C) cathode-active materials were prepared by a sol–gel method and investigated as the cathode material for lithium ion batteries. Electrochemical properties including the galvanostatic charge–discharge ability and cyclic voltammogram behavior were measured. Cyclic voltammetry (2.7–4.8 V) showed that the carbon nano-coating improved the "formation" of the LNCAO electrode, which was related to the increased electronic conductivity between the primary particles. The carbon nano-coated LNCAO/C exhibited good electrochemical performance at high C -rate. Also, the thermal stability at a highly oxidized state of the carbon nano-coated LNCAO was remarkably enhanced. The carbon nano-coating layer can serve as a physical and/or (electro-)chemical protection shell for the underlying LNCAO, which is attributed to an increase of the grain connectivity (physical part) and also to the protection of metal oxide from chemical reactions (chemical part).

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Guan, Dong Bo, Zhong Yi Cai, Yang Jiang, Shou Jun Wang, Hui An, Guoen Sun, Xiao Ming Qiu e Wei Guo Yao. "Study on Anti-Freezing Performance of Organic Fluorine Siloxane Nano Coating". Applied Mechanics and Materials 475-476 (dicembre 2013): 1325–28. http://dx.doi.org/10.4028/www.scientific.net/amm.475-476.1325.

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a low surface energy coating with a long chain fluorine siloxane is prepared, and the performance in anti-freezing adhesive is studied. It is determined that the optimum proportion of (Heptadecafluoro-1,1,2,2-tetradecyl) trimethoxysilane (FAS) and SiO2 nanopowder are 1.1% and 1.6%,respectively. the times of coating bear pendulum impact is least in this proportion. the conclusion is that bionic superhydrophobic coating plays a certain guiding role on solving material surface frozen sticky problem.

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Shen, Ting, Shuzhen Li, Zhenwei Wang e Lei Wang. "Rare bi-wetting TiO2-F/SiO2/F-PEG fabric coating for self-cleaning and oil/water separation". RSC Advances 6, n. 116 (2016): 115196–203. http://dx.doi.org/10.1039/c6ra24474b.

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Lainioti, Georgia C., Vasilis Koukoumtzis, Konstantinos S. Andrikopoulos, Lazaros Tsantaridis, Birgit Östman, George A. Voyiatzis e Joannis K. Kallitsis. "Environmentally Friendly Hybrid Organic–Inorganic Halogen-Free Coatings for Wood Fire-Retardant Applications". Polymers 14, n. 22 (16 novembre 2022): 4959. http://dx.doi.org/10.3390/polym14224959.

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Wood and wood-based products are extensively used in the building sector due to their interesting combination of properties. Fire safety and fire spread, however, are of utmost concern for the protection of buildings. Therefore, in timber structures, wood must be treated with fire-retardant materials in order to improve its reaction to fire. This article highlights the flame retardancy of novel hybrid organic–inorganic halogen-free coatings applied on plywood substrates. For this purpose, either a huntite-rich mineral (H5) or its modified nano-Mg (OH)2 type form (H5-m), acting as an inorganic (nano) filler, was functionalized with reactive oligomers (ROs) and incorporated into a waterborne polymeric matrix. A water-soluble polymer (P (SSNa-co-GMAx)), combining its hydrophilic nature with functional epoxide groups, was used as the reactive oligomer in order to enhance the compatibility between the filler and the matrix. Among various coating compositions, the system composed of 13% polymeric matrix, 73% H5 and 14% ROs, which provided the best coating quality and flame retardancy, was selected for the coating of plywood on a larger scale in one or two layers. The results indicated that the novel plywood coating systems with the addition of ecological coating formulations (WF-13, WF-14 and WF-15), prepared at two layers, reached Euroclass B according to EN13501-1, which is the best possible for fire systems applied to wood.

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Nguyen, Thien Vuong, Tuan Anh Nguyen e Thi Hau Nguyen. "The Synergistic Effects of Sio2 Nanoparticles and Organic Photostabilizers for Enhanced Weathering Resistance of Acrylic Polyurethane Coating". Journal of Composites Science 4, n. 1 (26 febbraio 2020): 23. http://dx.doi.org/10.3390/jcs4010023.

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This study aims to evaluate the synergical effects of SiO2 nanoparticles (nano-SiO2) and organic photostabilizers (Tinuvin 384 (T384) and Tinuvin 292 (T292)) on the weathering resistance of acrylic polyurethane coating. Data obtained from infrared (IR), field emission scanning electron microscopy (FESEM), and weight loss of coatings (before and after aging test), suggest that the SiO2 nanoparticles play a dual role, as both reinforcer and UV absorber, thus improving effectively both the mechanical properties and the weathering resistance of polyurethane acrylic coatings. The nanocomposite coating containing 2 wt % nano-SiO2, 2 wt % T384, and 1 wt % T292 exhibits excellent weathering and abrasion resistances, offering a durable outdoor application.

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Khramov, A. N., V. N. Balbyshev e R. A. Mantz. "Protection of Aluminium Alloys via Hybrid Sol-Gel Coatings with Encapsulated Organic Corrosion Inhibitors". Materials Science Forum 519-521 (luglio 2006): 661–66. http://dx.doi.org/10.4028/www.scientific.net/msf.519-521.661.

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Several heterocyclic organic corrosion inhibitors that contain ionazible functional group were encapsulated into nano-structural hybrid organo-silicate coating to improve its corrosion protection performance on aluminum alloy 2024-T3 substrate. When the coating is formed on the substrate surface, it serves simultaneously as protective barrier and as a reservoir for leachable corrosion inhibitor that is stored and released through the mechanism of reversible ionic interaction with the matrix material. The efficiency of active corrosion protection for these coating systems was examined by electrochemical methods including potentiodynamic polarization (PDS) and electrochemical impedance spectroscopy (EIS). The effects of chemical structure and the loading concentration of the inhibitor within the coating were determined.

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Irwan, Yusril, Muhammad Hans Arnaldo, Isda Duifa Arryana e Christophorus Chrisangga Ensrodyasmoko. "Optimal Enhancement Of Hardness, Hydrophobicity, And Surface Durability Of Pu-Coated Galvanized Material Jis G3302 With Polysilazane Nanomaterial". E3S Web of Conferences 484 (2024): 01010. http://dx.doi.org/10.1051/e3sconf/202448401010.

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Organic Polysilazane (OPSZ) nano-coatings are applied to the surface of polyurethane car body paint (pu-coated) to improve the hardness, hydrophobicity and durability of the Pu-coated surface. Three types of nano-coatings are used under the brand name Durazane®1500 Rapid cure in the formulas Tutoprom® 3641 and Tutoprom® 3042, along with Nano Coating brand Autoproo under Autoproo. The coating process to the substrate is done using a suede cloth with a wiping method. The coating was done in 1 layer with a dry time of 10 minutes to continue to the second layer. After coating, hardness testing was carried out using pencil hardness and hydrophobicity with Contact Angle measurement. Tests were carried out with curing times of 1 day, seven days, 17 days, and 21 days. To determine the durability, the specimens were left outdoors (exposed to rain and hot sun) for 21 days. Durazane® 1500 Rapid cure in Tutoprom® 3641 and Tutoprom® 3042 formulas increased the hardness up to the H scale, while the Autoproo brand has HB hardness value. Tutoprom® 3641 and Tutoprom® 3042 formulas can cause a taro leaf or hydrophobic effect with a contact angle of 104,5°. From the SEM results, the nano-coating can increase the thickness value and fill the substrate’s pores perfectly, increasing the adhesivity and protecting the pu-coated for a long time. High durability, where after 21 days, the coating still looks glossy and dust-free.

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Esmael, Israa Abdulsatar, Nadia Fakhry Ibraheem e Faris Moayed Ahmed. "Studying the Effect of Nano Filler on Epoxy Properties used in storage tank Low Carbon Steel Protection". Journal of Petroleum Research and Studies 10, n. 4 (21 dicembre 2020): 121–36. http://dx.doi.org/10.52716/jprs.v10i4.387.

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In this study a nano epoxy coating had been prepared to be used for the protection of the internal and external surfaces of storage tank (low carbon steel) from corrosion. A polymeric coating was reinforced with fillers such as red iron oxide, Zinc phosphate and nano titanium dioxide (TiO2) which have been used as anticorrosion. Pieces from low carbon steel was picked from storage tank and coated with two layers, the first layer was prepared from organic polymer (epoxy) with red iron oxide, the second layer was prepared from epoxy with (a nano titanium dioxide and Zinc phosphate). The fillers weight percentages were (0, 7, 10 and 13 % wt). The nano epoxy coating gave good results in limiting the corrosion, the corrosion rate results show that the best percentage of additives was (13,10 % wt) in salt solution 1.0 %wt ( NaCl, Na2SO3 and KCl ).The coating samples were immersed for 3 month at 25 OC in gas oil and cutting oil then was characterized using spectroscopic method (FTIR), physical and chemical tests add to characterization of particles size was done by SEM. The samples of TiO2 were characterized by XRD and evaluation of corrosion was made by using static potential test.

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Li, Guo, Hangyuan Cui, Jiacheng Zhou e Weijian Hu. "Improvements of Nano-TiO2 on the Long-Term Chloride Resistance of Concrete with Polymer Coatings". Coatings 9, n. 5 (16 maggio 2019): 323. http://dx.doi.org/10.3390/coatings9050323.

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The long-term chloride resistance of concrete treated with nano-TiO2-modified polymer coatings was studied. Three types of organic film-forming paints: polyurethane, epoxy resin, and chlorinated rubber were selected, and concrete specimens with nano-TiO2-modified coatings were fabricated. Then, specimens were subjected to periodical ultraviolet-accelerated aging and subsequent Coulomb electric flux experiments. Nanomodified coatings before and after ultraviolet aging were observed through scanning electron microcopy. Results indicate that the nano-TiO2 particles can effectively reduce the microdefects in coating films and alleviate damages due to aging. As a result, nano-TiO2 can significantly reduce the Coulomb fluxes of coated concrete before and after coating aging, and the average reduction amplitudes reached 66% and 44%. That is, nano-TiO2 can remarkably improve the long-term chloride resistance of coated concrete. In addition, we established the development models of the ultraviolet aging and chloride resistance of coated concrete according to an S-shaped curve.

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Mohd Zaini, Farah Khaleda, Vengadaesvaran Balakrishnan, A. Syafiq, Nasrudin Abd Rahim, A. K. Pandey, Ramesh Kasi e Ramesh Subramaniam. "Synthesis of nano-TiO2 coating systems for solar cell". Pigment & Resin Technology 49, n. 1 (6 gennaio 2020): 26–32. http://dx.doi.org/10.1108/prt-02-2019-0010.

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Purpose The purpose of this paper is to implement coating system by varying the amount of nano-sized titanium dioxide, (nano-TiO2) combined with various organic binders and to study the coating effects on the performance of solar cell in terms of temperature and efficiency. Design/methodology/approach Nano-TiO2 coatings are developed in two types of binder networks; the combination of methyltrimethoxy silane (MTMS) and nitric acid and the combination of 3-aminopropyl triethoxysilane (APTES) and MTMS. Overall, the formulations method was cost-effective, produces good transparency, clear and managed to dry at room temperature. The coating mixtures were applied onto the glass substrate by using the dip-coating method and the coated substrate were sent for several characterizations. Findings This study demonstrated that TiO2 nanoparticle coating in APTES/MTMS matrix showed a thermal-decreasing result on solar cells, where the cell temperature is reduced to 46.81°C (T2 coating type) from 55.74°C (without coating) after 1-h exposure under 1,000 W/m2 irradiance in a solar simulator. Contrary to prior works where solar cell coatings were reported to reduce the cell temperature at the expense of the cell efficiency, the results from this study reported an improved fill factor (FF) of solar cells. From the photovoltaic (PV) characteristics study, the FF for solar cells is increased by approximately 0.2, i.e. 33.3 per cent, for all coatings compared to the non-coated cell. Research limitations/implications Findings will be able to contribute in the development of temperature-reducing and efficiency-enhancing coating for PV panels. Practical implications A simple dip-coating method provides an even distribution of TiO2 nanoparticle coating on the glass panel, which is cost-effective and time-efficient to reduce the temperature of solar cell while maintaining its efficiency. Originality/value The ability of nano-TiO2 coatings with a simple fabrication method and the right solution to reduce the surface temperature of solar cells while improving the FF of the cells.

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Matsuda, Yu, Riki Orimo, Yusaku Abe, Yuri Hiraiwa, Yosuke Okamura e Yuta Sunami. "Pressure-Sensitive Nano-Sheet for Optical Pressure Measurement". Sensors 21, n. 21 (28 ottobre 2021): 7168. http://dx.doi.org/10.3390/s21217168.

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Pressure-Sensitive Paint (PSP) is a powerful measurement technique to obtain pressure distribution on a model of interest by measuring the emission intensity of the PSP coating with a camera. Since a PSP coating is prepared by applying a solution containing an organic solvent, generally, by sprayer, the properties such as the pressure- and the temperature-sensitivity depends on the skill of the person applying it. This fabrication process is one of the barriers to use of the PSP technique because of the legal restrictions on the use of organic solvents. Thus, a sticker-like PSP coating is useful because it does not require the use of organic solvent and the applying skill. In this study, we have fabricated freestanding Pressure-Sensitive Nano-Sheet (PSNS) by a sacrificial layer process using a spin-coating method. We employed Pt(II) meso-tetra(pentafluorophenyl)porphine (PtTFPP) as a pressure-sensitive dye and poly(1-trimethylsilyl-propyne) (PTMSP) and poly(L-lactic acid) (PLLA) as a polymer binder; thus, the PSNS samples based on PTMSP and PLLA were prepared. The pressure- and the temperature-sensitivity, the lifetime of the luminescence, and the quantum yield of the fabricated PSNS have been investigated. The pressure-sensitivity of PTMSP-based PSNS is higher than that of PLLA-based PSNS. Conversely, the quantum yield of PLLA-based PSNS is higher than that of PTMSP-based PSNS.

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Han, Chong, Mao-Xiang Jing, Hua Yang, Xiang-Qian Shen e Guan-Jun Qiao. "An Overlapped Nano-Fe2O3/TiO2 Composite Coating on Activated Carbon Fiber Membrane with Enhanced Photocatalytic Performance". Journal of Nanoscience and Nanotechnology 19, n. 11 (1 novembre 2019): 7123–30. http://dx.doi.org/10.1166/jnn.2019.16660.

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Treatment of high concentration organic wastewater has always been a difficult problem in the field of water purification due to its high cost, low efficiency, long processing cycle and possible second pollution. An overlapped nano-Fe2O3/TiO2@activated carbon fiber membrane composite was successfully prepared by hydrothermal loading method. Nano-rod-like TiO2 and columnar Fe2O3 polyhedrals overlapped and formed a composite coating on the surface of activated carbon fiber membrane. This composite can absorb visible light and successfully remove the high concentration Congo red pollutant (400 mg/L) in 24 h. The enhanced photocatalytic performance should be attributed to the synergistic reaction of nano-Fe2O3 and nano-TiO2, which improves the separation of photo-generated electrons and holes thus enhances the photocatalytic efficiency. This multifunctional fiber membrane is expected to be widely applied in various organic wastewater treatments.

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Bai, Xuelian, Bin Wu, Kun Jiang, Feng Zhang, Hua Zhang, Chengjun Liu e Meijing Cai. "Study on metal corrosion protection mechanism of graphene nano coating". E3S Web of Conferences 213 (2020): 02018. http://dx.doi.org/10.1051/e3sconf/202021302018.

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Organic coating is considered to be one of the most effective methods to prevent metal corrosion. The corrosion resistance of the coating was tested by the improved copper accelerated acetic acid immersion test, and the quality change of the coating sample before and after immersion was tested. The appearance change of graphene was observed by SEM, and the anticorrosion mechanism of graphene was studied. The results showed that the copper salt accelerated acetic acid salt immersion test accelerated the corrosion process and shortened the determination time. There was no obvious change in the test sample after soaking for 400h. The main anticorrosion mechanism is that the conductive graphene in graphene nano anticorrosive coating can effectively protect the metal substrate by “conductive bridging”.

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Li, Guo Jun, Xue Jun Cui e Rui Ming Ren. "Preparation and Properties of the Organic-Inorganic Composite Coating on Aluminum Alloy". Materials Science Forum 675-677 (febbraio 2011): 1197–200. http://dx.doi.org/10.4028/www.scientific.net/msf.675-677.1197.

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The organic-inorganic hybrid sol was prepared using an alkaline silica sol modified by acid-catalyzed hydrolytic polycondensation of methyltrimethoxysilane (MTMS) in a water-bath condition of 60oC, and then the water-based primer and topcoat were prepared through adding the pigments and nano-TiO2 suspension respectively. Through spraying and baking, the organicinorganic composite coating on the treated aluminum alloy was obtained. The optimum range of P/B (weight ratio of the pigment/binder) is determined between 1:1 and 1.5:1 by investigating the influence of the P/B of the primer on the adhesion and impact resistance of the coating. The microstructure of the coating was characterized by optical microscopy and scanning electron microscopy. The results show that there are lots of holes and lamellar structure in the primer coating and the obtained topcoat coating is uniform, smooth and dense. The coating of ~30 μm in thickness is mainly composed of three elements of silicon, aluminum and titanium, in which transition layer of ~10 μm is included. The physicochemical properties suggest that the coatings on aluminum alloy can meet the needs of finishing coating very well.

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Othman, Ahmad Razi. "Determination of the Median Effective Concentration of Nano-Zero Valent Iron to the Marine Phytoplankton Species Isochrysis galbana". Journal of Biochemistry, Microbiology and Biotechnology 6, n. 2 (31 dicembre 2018): 7–9. http://dx.doi.org/10.54987/jobimb.v6i2.426.

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Nano zero valent iron (nZVI) is often used in the remediation of organic and inorganic contaminant and has been hailed as an emerging remediation tool. Unfortunately, were few studies has been done on the toxicity of nZVI on organisms especially aquatic organisms. In this study, the toxicity of commercial forms (uncoated, organic coating, and iron oxide coating) of nano zero-valent iron (nZVI) to the marine phytoplankton Isochrysis galbana is revisited in terms of the determination of the EC50 or median effective concentration using nonlinear regression. Based on the four-parameter logistics equation, the median effective concentration for Nanofer 25S, Fe2+ and Fe3+ were 5.46 mg/L (95% confidence interval of 4.84 to 6.16), 70.89 mg/L (95% confidence interval of 37.26 to 134.9), 64.29 mg/L (95% confidence interval of 44.92 to 92.02). The results indicate that Nanofer 25S was the most toxic.

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Yang, Shuo, Huiya Qin, Xuan Li, Huijun Li e Pei Yao. "Enhancement of Thermal Stability and Cycling Performance of Lithium-Ion Battery at High Temperature by Nano-ppy/OMMT-Coated Separator". Journal of Nanomaterials 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/6948183.

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Nanopolypyrrole/organic montmorillonite- (nano-ppy/OMMT-) coated separator is prepared by coating nano-ppy/OMMT on the surface of polyethylene (PE). Nano-ppy/OMMT-coated separator with three-dimensional and multilayered network structure is beneficial to absorb more organic electrolyte, enhancing the ionic conductivity (reach 4.31 mS·cm-1). Meanwhile, the composite separator exhibits excellent thermal stability and mechanical properties. The strong covalent bonds (Si-F) are formed by the nucleophilic substitution reaction between F−from the thermal decomposition and hydrolysis of LiPF6and the covalent bonds (Si-O) of nano-ppy/OMMT. The Si-F can effectively prevent the formation of HF, POF3, and LiF, resulting in the inhibition of the disproportionation of Mn3+in LiNi1/3Co1/3Mn1/3O2material as well as reducing the internal resistance of the cell. Therefore, the nano-ppy/OMMT-coated separator exhibits outstanding capacity retention and cycling performance at 80°C.

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Hannig, M., L. Kriener, W. Hoth-Hannig, C. Becker-Willinger e H. Schmidt. "Influence of Nanocomposite Surface Coating on Biofilm Formation In Situ". Journal of Nanoscience and Nanotechnology 7, n. 12 (1 dicembre 2007): 4642–48. http://dx.doi.org/10.1166/jnn.2007.18117.

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Caries and periodontitis, the most wide-spread oral diseases around the world, are caused by bacterial adherence and biofilm formation onto the natural as well as restored tooth surface. One possible way to prevent the pathogenic consequences of intraoral biofilm formation might be the modification of the tooth surface by application of an anti-adhesive coating that interferes with the bacterial attachment and subsequent bacterial accumulation. The objective of this study was to investigate the effect of an experimental, low surface free energy nano-composite coating material on biofilm formation in situ. For this purpose, an organic/inorganic nano-composite coating (NANOMER®, INM, Saarbrücken, Germany) with a surface free energy of 18–20 mJ/m2 was applied to enamel as well as titanium specimens. The nano-composite coated specimens and un-coated controls were attached to removable intraoral splints and carried by volunteers over 24 h in the oral cavity. After intraoral exposure, specimens were processed for transmission electron microscopic analysis. On non-coated enamel and titanium control samples a multi-layer of adherent bacteria was found. In contrast, on nano-composite coated specimens strongly reduced biofilm formation was observed. In most areas of the surface-coated specimens only a 10–20 nm thick electron dense layer of adsorbed salivary proteins with adherent protein agglomerates of 20–80 nm diameter could be detected. In addition, detachment of the adsorbed biofilm from the nano-composite coated surfaces was evident in electron microscopic micrographs. The present investigation provides ultrastructural evidence that it is possible to cover enamel as well as titanium with a nano-composite coating revealing easy-to-clean surface properties that cause reduced biofilm formation and accelerated removal of adherent biofilms under oral conditions.

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Zhang, Xiao Hui, Qi Guang Cao, Lin Hu e Jian Yu Cui. "Preparation and Modification of Nano- TiO₂ Pigment for Coating". Advanced Materials Research 146-147 (ottobre 2010): 1675–80. http://dx.doi.org/10.4028/www.scientific.net/amr.146-147.1675.

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Nanoscale titanium dioxide powder were prepared in terms of sol-gel process with Ti(OC4H9) as raw material. TEM analysis show that the size of nanoparticle are between 50～ 100nm.The results of XRD test indicate that the crystal style of the product is rutile type. In order to apply nanoscale titanium dioxide to coating as pigment, the nanoscale particles were modified in terms of esterifying reaction,silane coupling agent and organic titanate coupling agent. The results of contact angle test show that the oleophilic of modified product with organic titanate coupling agent is stronger than that with silane coupling agent and esterifying reaction.

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Zhang, Dashuai, Shishu Sun, Yan Zhang, Xiaopeng Zhang, Chen Li, Tianyi Sun, Linhua Zhu e Zaifeng Shi. "Preparation and Self-Cleaning Performance of High-Strength Double-Layer PVDF-PVC-Nano-Graphite/PVDF-PVC Super-Hydrophobic Composite Membrane". Molecules 28, n. 23 (28 novembre 2023): 7821. http://dx.doi.org/10.3390/molecules28237821.

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The double-layer PVDF-PVC (D-PP/PP) super-hydrophobic composite membrane was prepared by the coating immersion phase separation method to enhance the mechanical properties of the composite membrane. The D-PP/PP super-hydrophobic membrane was prepared using the casting solution concentration of 12 wt% PVDF-PVC composite membrane as basement and 4% casting of PVDF-PVC coating. The contact angle of the D-PP/PP membrane was 150.4 ± 0.3°, and the scanning electron microscope showed that the surface of the D-PP/PP membrane was covered by a cross-linked micro–nano microsphere. The mechanical properties showed that the maximum tensile force of the D-PP/PP composite membrane was 2.34 N, which was 19.4% higher than that of PVDF-PVC (1.96 N). Nano-graphite was added to the coating layer in the experiment. The prepared double-layer PVDF-PVC-nano-graphite/PVDF-PVC (D-PPG/PP) composite membrane reached 153.7 ± 0.5°, the contact angle increasing by 3.3°. The SEM comparison showed that the D-PPG/PP composite membrane had a more obvious micro–nano level microsphere layer. The mechanical properties are also superior. By preparing the D-PP/PP membrane, the mechanical properties of the membrane were improved, and the super-hydrophobic property of the coating was also obtained. At the same time, it was found that adding nano-graphite to the coating layer can better improve the hydrophobic, mechanical, and self-cleaning properties of the D-PP/PP composite membrane.

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Hwang, Song Hye, Doo Whan Kang e Ho-Jong Kang. "Modification of Nano Silica for Multi-functional Organic/Inorganic Hybrid Hard Coating". Polymer Korea 40, n. 6 (30 novembre 2016): 967. http://dx.doi.org/10.7317/pk.2016.40.6.967.

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Perets, E. A., A. S. D. S. Indrasekara, A. Kurmis, N. Atlasevich, L. Fabris e J. Arslanoglu. "Carboxy-terminated immuno-SERS tags overcome non-specific aggregation for the robust detection and localization of organic media in artworks". Analyst 140, n. 17 (2015): 5971–80. http://dx.doi.org/10.1039/c5an00817d.

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Abstract (sommario):

Surface-enhanced Raman scattering (SERS) nano-tags with a carboxy-terminated PEG surface coating overcome non-specific aggregation when applied for the immunological detection and localization of proteinaceous binding media in art samples.

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Jamilu Usman, Mohd Hafiz Dzarfan Othman, Ahmad Fauzi Ismail, Yusuf Olabode Raji, Tijjani Hassan El-Badawy, Tijjani Abdullahi e Jamila Baba Ali. "Facile Approach in Development of Superhydrophobic-Superoleophilic Kaolin-Based Hollow Fibre Ceramic Membrane". Open Journal of Science and Technology 3, n. 2 (5 agosto 2020): 166–73. http://dx.doi.org/10.31580/ojst.v3i2.1473.

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A silane coupling agent is an organosilicon compound with special structure possessing organic functional groups and hydrolysable groups. In this study, a superhydrophobic-superoleophilic nano-silica film on ceramic membrane was constructed by a modified Stöber technique by using tetraethoxy-silane (TEOS) and fluoroalkyl silane (FAS). The colloidal nano-silica based silane sol coating solution was synthesized via co-hydrolysis and co-condensation of TEOS and FAS. Particle size distribution of the colloidal nano-silica based silane sol was evaluated using particle size analyzer as depicted. The contents of the relative elements of the colloidal nano-silica based silane sol were examined using energy dispersive x-ray (EDX) spectra. Extent of superhydrophobicity-superoleophilicity was determined using the contact angle measurements. The surface wettability of superhydrophobicity-superoleophilicity was determined using the contact angle measurements. Also, the effects of grafting times and coating cycles on the wettability of the modified kaolin-based hollow fiber membrane were determined. The results revealed that the modified kaolin-based hollow fiber membrane exhibited oil contact of 0o and water contact angle of 160o and, demonstrating its considerable antiwetting applications like in oil-water filtration process. While, with an increase in grafting times and coating cycles, the wettability of the superhydrophobic-superoleophilic nano-silica film was enhanced due to increase in surface roughness provided by the hydrolysable groups on the surface of the ceramic membrane. In conclusion, this study presents a feasible route to the surface superhydrophobicity-superoleophilicity testing of ceramic membranes

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Zhou, Ningning, Liancheng Yang, Li Du, Nannan Wang e Cheng Qi. "Research and Development of Organic/Inorganic Mixtures Compound Coated Antioxidants". Journal of Physics: Conference Series 2285, n. 1 (1 giugno 2022): 012010. http://dx.doi.org/10.1088/1742-6596/2285/1/012010.

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Abstract For plastic thermal oxidative aging, it is inevitable that the material properties will decline and eventually lead to product damage. It is very important to improve the performance retention rate of materials under aging conditions and ultimately delay the damage to prolong the service life of products. In this study, nano-zinc oxide was selected as the compound auxiliary antioxidant of the main antioxidant 1010. Nano-zinc oxide is very obvious to improve the comprehensive performance of plastics. The retention rate of the tensile strength and elongation at break of the plastic in the test is significantly improved after hot air aging due to the small size effect of nano-zinc oxide increases the cross-linked network density, which is related to the realization of molecular-level bonding of polymer materials. This study not only innovated in the selection of materials which selected nano-zinc oxide as an auxiliary antioxidant, but also realized the coating structure of the main/auxiliary antioxidant by changing the process conditions, so as to finally realize the ideal mixing and distribution of the main/auxiliary antioxidant, to improve the mechanical properties of general-purpose plastics after introduction, and ultimately optimize the antioxidant properties.

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Hang, Tian, Hui-Jiuan Chen, Shuai Xiao, Chengduan Yang, Meiwan Chen, Jun Tao, Han-ping Shieh, Bo-ru Yang, Chuan Liu e Xi Xie. "TiO 2 nanowire-templated hierarchical nanowire network as water-repelling coating". Royal Society Open Science 4, n. 12 (dicembre 2017): 171431. http://dx.doi.org/10.1098/rsos.171431.

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Extraordinary water-repelling properties of superhydrophobic surfaces make them novel candidates for a great variety of potential applications. A general approach to achieve superhydrophobicity requires low-energy coating on the surface and roughness on nano- and micrometre scale. However, typical construction of superhydrophobic surfaces with micro-nano structure through top-down fabrication is restricted by sophisticated fabrication techniques and limited choices of substrate materials. Micro-nanoscale topographies templated by conventional microparticles through surface coating may produce large variations in roughness and uncontrollable defects, resulting in poorly controlled surface morphology and wettability. In this work, micro-nanoscale hierarchical nanowire network was fabricated to construct self-cleaning coating using one-dimensional TiO 2 nanowires as microscale templates. Hierarchical structure with homogeneous morphology was achieved by branching ZnO nanowires on the TiO 2 nanowire backbones through hydrothermal reaction. The hierarchical nanowire network displayed homogeneous micro/nano-topography, in contrast to hierarchical structure templated by traditional microparticles. This hierarchical nanowire network film exhibited high repellency to both water and cell culture medium after functionalization with fluorinated organic molecules. The hierarchical structure templated by TiO 2 nanowire coating significantly increased the surface superhydrophobicity compared to vertical ZnO nanowires with nanotopography alone. Our results demonstrated a promising strategy of using nanowires as microscale templates for the rational design of hierarchical coatings with desired superhydrophobicity that can also be applied to various substrate materials.

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PARK, HOYYUL, MYEONGSANG AHN e MOONKYONG NA. "CHARACTERISTICS OF THIN FILMS SYNTHESIZED FROM NANO BOEHMITE AND ORGANOALKOXYSILANE". Surface Review and Letters 17, n. 03 (giugno 2010): 277–81. http://dx.doi.org/10.1142/s0218625x10013618.

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We investigated the properties of inorganic–organic hybrid thin films prepared by sol–gel reaction. Sol solutions were synthesized by using two kinds of nanosized boehmite and methyltrimethoxysilane (MTMS) in variation with the amount of MTMS at different reaction times. Boehmite nano sol of spherical and fibrous shapes was used as inorganic material, and MTMS was used as organic material. The morphology of boehmite nano sol powder was observed by transmission electron microscopy. Coating sols were prepared from boehmite sol and MTMS by sol–gel reaction. Physical and chemical properties of thin films prepared from boehmite and MTMS sols were investigated. Surface hydrophobicity, roughness, thickness, thermal resistance and electrical resistivity of boehmite/MTMS thin films were investigated.

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Cheng, Guojun, Jiaqi Luo, Jiasheng Qian e Jibin Miao. "Surface modification of nano-TiN by using silane coupling agent". Materials Science-Poland 32, n. 2 (1 giugno 2014): 214–19. http://dx.doi.org/10.2478/s13536-013-0175-8.

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AbstractTitanium nitride (TiN) nano-particles were subjected to graft modification by silane coupling agent (KH-570) via a direct blending method. The hydroxyl groups on the surface of TiN nano-particles can interact with silanol groups [-Si-OCH3] of KH-570 forming an organic coating layer. The covalent bonds (Ti-O-Si) formation was testified by Fourier transform infrared spectra (FTIR) and X-ray photoelectron spectroscopy (XPS). Through transmission electron micrograph (TEM) observations, it was found that KH-570 could improve the dispersibility of nano-TiN particles in ethyl acetate. Thermo gravimetric analysis (TGA) and contact angle measurements indicated that KH-570 molecules were adsorbed or anchored on the surface of nano-TiN particle and the net efficiency of it was 22.76 %, which facilitated to hinder the aggregation of nano-TiN particles.

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Deng, Xu, Lena Mammen, Hans-Jürgen Butt e Doris Vollmer. "Candle Soot as a Template for a Transparent Robust Superamphiphobic Coating". Science 335, n. 6064 (1 dicembre 2011): 67–70. http://dx.doi.org/10.1126/science.1207115.

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Coating is an essential step in adjusting the surface properties of materials. Superhydrophobic coatings with contact angles greater than 150° and roll-off angles below 10° for water have been developed, based on low-energy surfaces and roughness on the nano- and micrometer scales. However, these surfaces are still wetted by organic liquids such as surfactant-based solutions, alcohols, or alkanes. Coatings that are simultaneously superhydrophobic and superoleophobic are rare. We designed an easily fabricated, transparent, and oil-rebounding superamphiphobic coating. A porous deposit of candle soot was coated with a 25-nanometer-thick silica shell. The black coating became transparent after calcination at 600°C. After silanization, the coating was superamphiphobic and remained so even after its top layer was damaged by sand impingement.

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Sasaki, Koji, e Noritsuka Mizumura. "Development of low temperature sintered nano silver pastes using MO technology and resin reinforcing technology". International Symposium on Microelectronics 2013, n. 1 (1 gennaio 2013): 000842–47. http://dx.doi.org/10.4071/isom-2013-thp32.

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Traditional thick film technology is widely used in various electronics products. There are two type of paste based on thick film technology. Typically, over 400°C is required for high temperature sintering type which contains glass for adhesion function. It shows high electrical and thermal performance. On the other hand, 150–300°C range process is used for low temperature process type as silver epoxy. In last decade, nano silver technology shows amazing progress to address low temperature operation by low temperature sintering. This paper will discuss the results on fundamental study of newly developed nano silver pastes with unique approach which uses MO (Metallo-organic) technology and resin reinforcing technology. Nano silver pastes contain several types of dispersant as surface coating to prevent agglomeration of the particles. Various coating technique has been reported to optimize sintering performance and stability. MO technology provides low temperature sintering capability by minimizing the coating material. The nano silver pastes show high electrical and thermal performance. However, degradation of die shear strength has been found by thermal cycling test due to the fragility of porous sintered structure. To improve the mechanical property, resin reinforcing technology has been developed. By adding special resin to the pastes, the porous area is filled with the resin and the sintered structure is reinforced. Degradation of die shear strength was not found by thermal cycling test to 1000 cycles. Nano silver pastes using MO technology and resin reinforcing technology will meet lots of requirement on various thick film applications.

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Sasaki, Koji, e Noritsuka Mizumura. "Development of low temperature sintered nano silver pastes using MO technology and resin reinforcing technology". Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2014, HITEC (1 gennaio 2014): 000172–77. http://dx.doi.org/10.4071/hitec-wa22.

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Traditional thick film technology is widely used in various electronics products. There are two type of paste based on thick film technology. Typically, over 400°C is required for high temperature sintering type which contains glass for adhesion function. It shows high electrical and thermal performance. On the other hand, 150–300°C range process is used for low temperature process type as silver epoxy. In last decade, nano silver technology shows amazing progress to address low temperature operation by low temperature sintering. This paper will discuss the results on fundamental study of newly developed nano silver pastes with unique approach which uses MO (Metallo-organic) technology and resin reinforcing technology. Nano silver pastes contain several types of dispersant as surface coating to prevent agglomeration of the particles. Various coating technique has been reported to optimize sintering performance and stability. MO technology provides low temperature sintering capability by minimizing the coating material. The nano silver pastes show high electrical and thermal performance. However, degradation of die shear strength has been found by thermal cycling test due to the fragility of porous sintered structure. To improve the mechanical property, resin reinforcing technology has been developed. By adding special resin to the pastes, the porous area is filled with the resin and the sintered structure is reinforced. Degradation of die shear strength was not found by thermal cycling test to 1000 cycles. Nano silver pastes using MO technology and resin reinforcing technology will meet lots of requirement on various thick film applications.

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Rebati, Aziz, Manuel Piñero, Nicolás de la Rosa-Fox e Luis Maria Esquivias Fedriani. "Mechanical Properties of Organic-Inorganic Hybrid Black Coating of Silica and Polyurethane". Key Engineering Materials 423 (dicembre 2009): 161–65. http://dx.doi.org/10.4028/www.scientific.net/kem.423.161.

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The mechanical properties of black thin film on glass substrates and metallic, obtained from the synthesis of organic-inorganic silica hybrids via sol-gel are described. Hybrid silica-based coatings with tetraethoxysilane (TEOS), methyltrietoxysilane (MTES), polyurethane (PU) and commercial silica colloidal solution (Ludox HS30) as precursors, were used. The procedure is divided in the following three steps: 1) obtaining homogenous and stable solutions of different organic silica-polymer composition, 2) aggregation of the black pigment with the formulate FeMnOx, 3) Coating substrates by both dip-coating and aerograph airbrush, at room temperature. The films obtained were characterized by SEM, AFM and nano-indentation. The coatings of the Ludox-MTES-PU/FeMnOx system showed the better characteristics concerning the morphology and the adhesion to the glass and metallic copper substrates

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Soga, Kohei, Aya Okada, Yu Saito, Yuji Kameyama e Tomoya Konishi. "Coating on Upconversion Emissive Nano-particles with Photocuring Resin". Journal of Photopolymer Science and Technology 20, n. 1 (2007): 7–9. http://dx.doi.org/10.2494/photopolymer.20.7.

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Gao, Fan, Xueqin Ma, Yi Tan, Bo Zhang, Yixing Yang, Hongqi Nie e Zhixiang Xu. "The Effect of Organic Matter from Sewage Sludge as an Interfacial Layer on the Surface of Nano-Al and Fluoride". Molecules 28, n. 18 (7 settembre 2023): 6494. http://dx.doi.org/10.3390/molecules28186494.

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Due to its high reactivity, the nano aluminum particle (n-Al) has attracted more attention in energetic materials but is easily oxidized during processing. In order to realize sewage sludge (SS) resource and n-Al coating, the organic matter was extracted from SS, using the deep eutectic solvent method due to its strong dissolving capacity, and then the organic matter was pretreated by ball milling, which was used as an interfacial layer between n-Al and fluoride. It was found that organic matter was successfully extracted from SS. The main organic matter is proteins. The ball milling method can effectively destroy the secondary structure of proteins to release more active functional groups. During the pretreatment, the Maillard reaction broke the proteins structure to form more active low molecular weight compounds. It was confirmed that n-Al can be coated by PBSP under mild conditions to form a uniform core-shell structure. PFOA can effectively coat the n-Al@PBSP to form n-Al@PBSP/PFOA, which can enhance the combustion of n-Al. The gas phase flame temperature can notably improve to 2892 K. The reaction mechanism between n-Al and coating was analyzed. The results could help SS treatment and provide new insights for n-Al coating and SS-based organic matter recovery and utilization.

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