Artykuły w czasopismach: „Nano Molding”

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Ito, Hiroshi. "Micro-/Nano-Molding". Seikei-Kakou 30, nr 7 (25.06.2018): 371–78. http://dx.doi.org/10.4325/seikeikakou.30.371.

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ITO, Hiroshi. "Nano/Micro-Molding". Journal of the Japan Society for Technology of Plasticity 57, nr 663 (2016): 340–44. http://dx.doi.org/10.9773/sosei.57.340.

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Zhang, Nan, Cormac J. Byrne, David J. Browne i Michael D. Gilchrist. "Towards nano-injection molding". Materials Today 15, nr 5 (maj 2012): 216–21. http://dx.doi.org/10.1016/s1369-7021(12)70092-5.

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Choi, Doo Sun, Tae Jin Je, Young Ho Seo i Kyung Hyun Whang. "Nano Pattern Mold Technology Using Nano Stamper Based on Quartz". Key Engineering Materials 277-279 (styczeń 2005): 912–18. http://dx.doi.org/10.4028/www.scientific.net/kem.277-279.912.

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In this paper, we present a reusable quartz master fabricated by electron-beam lithography and the results of the preliminary test of injection molding using the reusable quartz master. Since patterned structures of photoresist can be easily damaged by demolding process of nickel stamper and master, a master with photoresist cannot be reused in stamper fabrication process. In this work, we have made it possible of the repeated use of master by directly patterning on quartz in nickel stamper fabrication process. We have developed a 100nm-pit sized reusable quartz master with intaglio carving patterns of finer sizes than those of DVD (400nm) and blue-ray disc (200nm). In the preliminary test of the injection molding, we have found optimum injection molding conditions using polypropylene.

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ITO, Hiroshi. "Polymer Micro-and Nano-Molding". Journal of the Japan Society for Technology of Plasticity 52, nr 610 (2011): 1143–47. http://dx.doi.org/10.9773/sosei.52.1143.

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Schift, Helmut, Sunggook Park i Jens Gobrecht. "Nano-Imprint-Molding Resists for Lithography". Journal of Photopolymer Science and Technology 16, nr 3 (2003): 435–38. http://dx.doi.org/10.2494/photopolymer.16.435.

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Mao, Huajie, Bo He, Wei Guo, Lin Hua i Qing Yang. "Effects of Nano-CaCO3 Content on the Crystallization, Mechanical Properties, and Cell Structure of PP Nanocomposites in Microcellular Injection Molding". Polymers 10, nr 10 (17.10.2018): 1160. http://dx.doi.org/10.3390/polym10101160.

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Using supercritical nitrogen as the physical foaming agent, microcellular polypropylene (PP) nanocomposites were prepared in microcellular injection molding. The main purpose of this work is to study effects of content of nano-CaCO3 on the crystallization, mechanical properties, and cell structure of PP nanocomposites in microcellular injection molding. The results show that adding nano-CaCO3 to PP could improve its mechanical properties and cell structure. The thermal stability and crystallinity enhances with increase of nano-CaCO3. As a bubble nucleating agent, adding nano-CaCO3 to PP improves the cell structure in both the parallel sections and vertical sections. The mechanical properties increase first and then decrease with increase of nano-CaCO3. The mechanical properties are affected by the cell structure, as well. The mechanical properties and cell structure are optimum when the content of nano-CaCO3 is 6 wt %.

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Amano, Akira. "Nano-Level Surface Machining for Molding Die". Seikei-Kakou 21, nr 4 (20.03.2009): 172–77. http://dx.doi.org/10.4325/seikeikakou.21.172.

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Yoo, Young Eun, Young Ho Seo, Seong Kon Kim, Tai Jin Je i Doo Sun Choi. "Injection Molding Nano and Micro Pillar Arrays". Key Engineering Materials 326-328 (grudzień 2006): 449–52. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.449.

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An injection molding technology is developed to replicate pillars in micro/nano scale on the thin plastic substrate. Two types of pillar are to be replicated and one is square type of 10um x 10um, the other is circular type whose diameter is in range of 100 nm ~ 300 nm. For both types of the pillars, the height is about 250 nm. A pattern master is first fabricated on the photo resist(PR) layer spin coated to about 250nm of thickness on chrome/quartz plate by patterning e-beam writing and then developing the PR. The patterns on the PR master are transferred by nickel electro-plating to fabricate rigid nickel stamper. Using this nickel stamper, a substrate with nano pillars on its surface is injection molded by optimizing the conditions to fabricate DNA separating chip.

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Nishiyabu, Kazuaki, Kenichi Kakishita i Shigeo Tanaka. "Micro Metal Injection Molding Using Hybrid Micro/Nano Powders". Materials Science Forum 534-536 (styczeń 2007): 381–84. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.381.

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This study aims to investigate the effects of hybrid micro/nano powders in a micro metal injection molding (μ-MIM) process. A novel type of mixing-injection molding machine was used to produce tiny specimens (<1mm in size) with high trial efficiency using a small amount of feedstock (<0.05cm3 in volume). Small dumbbell specimens were produced using various feedstocks prepared by changing binder content and fraction of nano-scale Cu powder (130nm in particle size). The effects of adding the fraction of nano-scale Cu powder on the melt viscosity of the feedstock, microstructure, density and tensile strength of sintered parts were discussed.

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Menotti, Stefano, Giuliano Bissacco, Hans Nørgaard Hansen, Peter Torben Tang i Christian Ravn. "Characterization Methods of Nano-Patterned Surfaces Generated by Induction Heating Assisted Injection Molding". International Journal of Automation Technology 9, nr 4 (5.07.2015): 349–55. http://dx.doi.org/10.20965/ijat.2015.p0349.

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An induction heating-assisted injection molding (IHAIM) process developed by the authors is used to replicate surfaces containing random nano-patterns. The injection molding setup is developed so that an induction heating system rapidly heats the cavity wall at rates of up to 10°C/s. In order to enable the optimization of the IHAIM process for nano-pattern replication, it is necessary to develop robust methods for quantitative characterization of the replicated nano-patterns. For this purpose, three different approaches for quantitative characterization of random nano-patterns are applied and compared. Results show that the use of IHAIM is an efficient way to improve replication quality. All three measurement methods are capable of detecting the trend of the replication quality of the surface changing the process condition.

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Shin, Hong Gue, Heon Young Kim i Byeong Hee Kim. "Nano Molding Technology for Optical Storage Media with Large-Area Nano-Pattern". Key Engineering Materials 364-366 (grudzień 2007): 925–30. http://dx.doi.org/10.4028/www.scientific.net/kem.364-366.925.

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Nano hot or thermal embossing has many advantages of comparatively few process steps, simple operation, relatively low tooling cost and high replication accuracy for small features. However, because of its long processing time, it has been known as being less competitive than nano injection molding. In order to overcome the weakness of long processing time, the high speed nano hot embossing system has been developed and its characteristics were investigated. Nanopatterned stampers made of Ni and Si were fabricated by the laser mastering and electroforming process and the DRIE and LPCVD or thermal oxidation process respectively. In order to make the processing time shorter and get relatively higher aspect ratio nano/micro features, especially, the temperatures of the molds were controlled actively and precisely during the embossing process. Through various experiments, nano embossing parameters, such as temperature, pressure and processing time, are optimized and the high aspect ratio nano features could be obtained.

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Zhang, Zhan Xin, Hui Feng Bo i Ru Zheng Wang. "Study on the Molding Process of Nano-Ceramics". Advanced Materials Research 496 (marzec 2012): 211–14. http://dx.doi.org/10.4028/www.scientific.net/amr.496.211.

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Nano-ceramics with excellent strength, toughness, oxidation resistance, corrosion resistance and the like metals superplasticity show an attractive application prospect. However, the production of high density of nano-ceramics is very difficult. This paper focuses on the preparation of concentrated suspension slurry, the main technical parameters and the additive proportion of raw materials. The optimum dosage of dispersant PAANa is 1.4wt%. When the PH value is about 9, the best stability of slurry is achieved. When the milling time reaches 10h, the lowest viscosity is reached. The solid content viscosity of slurry increases with the decrease of the slurry temperature. Solid phase volume with 40vol% of slurry can be successfully cast out the mould homogeneously.

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Kelly, Jennifer Y., i Joseph M. DeSimone. "Shape-Specific, Monodisperse Nano-Molding of Protein Particles". Journal of the American Chemical Society 130, nr 16 (kwiecień 2008): 5438–39. http://dx.doi.org/10.1021/ja8014428.

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Deagen, Michael E., Edwin P. Chan, Linda S. Schadler i Chaitanya K. Ullal. "Size effects in plasma-enhanced nano-transfer adhesion". Soft Matter 14, nr 45 (2018): 9220–26. http://dx.doi.org/10.1039/c8sm01862f.

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Asgar, Md Ali, Jun Kim, Muhammad Refatul Haq, Taekyung Kim i Seok-min Kim. "A Comprehensive Review of Micro/Nano Precision Glass Molding Molds and Their Fabrication Methods". Micromachines 12, nr 7 (12.07.2021): 812. http://dx.doi.org/10.3390/mi12070812.

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Micro/nano-precision glass molding (MNPGM) is an efficient approach for manufacturing micro/nanostructured glass components with intricate geometry and a high-quality optical finish. In MNPGM, the mold, which directly imprints the desired pattern on the glass substrate, is a key component. To date, a wide variety of mold inserts have been utilized in MNPGM. The aim of this article is to review the latest advances in molds for MNPGM and their fabrication methods. Surface finishing is specifically addressed because molded glass is usually intended for optical applications in which the surface roughness should be lower than the wavelength of incident light to avoid scattering loss. The use of molds for a wide range of molding temperatures is also discussed in detail. Finally, a series of tables summarizing the mold fabrication methods, mold patterns and their dimensions, anti-adhesion coatings, molding conditions, molding methods, surface roughness values, glass substrates and their glass transition temperatures, and associated applications are presented. This review is intended as a roadmap for those interested in the glass molding field.

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Ito, Hiroshi. "ANTEC 2010 Ⅱ. Reports on Nano/Micro Molding, Injection Molding and Medical Platics Session". Seikei-Kakou 22, nr 10 (20.09.2010): 574–77. http://dx.doi.org/10.4325/seikeikakou.22.574.

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Ito, Hiroshi. "ANTEC 2009 II. Reports on Nano/Micro Molding, Injection Molding and Medical Platics Session". Seikei-Kakou 21, nr 10 (20.09.2009): 614–17. http://dx.doi.org/10.4325/seikeikakou.21.614.

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Panthapulakkal, S., i M. Sain. "Preparation and Characterization of Cellulose Nanofibril Films from Wood Fibre and Their Thermoplastic Polycarbonate Composites". International Journal of Polymer Science 2012 (2012): 1–6. http://dx.doi.org/10.1155/2012/381342.

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The aim of this study was to develop cellulose-nanofibril-film-reinforced polycarbonate composites by compression molding. Nano fibres were prepared from wood pulp fibres by mechanical defibrillation, and diameter distribution of the fibres produced was in the range of 1–100 nm. Nanofibre films were prepared from the nanofibre suspensions and were characterized in terms of strength properties, crystallinity, and thermal properties. Strength and modulus of the nano fibre films prepared were 240 MPa and 11 GPa, respectively. Thermal properties of the sheets demonstrated the suitability of processing fibre sheets at high temperature. Tensile properties of the films subjected to composite-processing conditions demonstrated the thermal stability of the fibre films during the compression molding process. Nanocomposites of different fibre loads were prepared by press-molding nano fibre sheets with different thickness in between polycarbonate sheet at 205°C under pressure. The tensile modulus and strength of the polycarbonate increased with the incorporation of the fibres. The strength of the thermoplastic increased 24% with 10% of the fibres and is increased up to 30% with 18% of the fibres. Tensile modulus of the polycarbonate demonstrated significant enhancement (about 100%).

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Rastogi, Vibhore K., i Pieter Samyn. "Compression Molding of Polyhydroxybutyrate Nano-Composite Films as Coating on Paper Substrates". Materials Proceedings 2, nr 1 (20.04.2020): 31. http://dx.doi.org/10.3390/ciwc2020-06797.

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After successful preparation of master batch formulations including polyhydroxybutyrate (PHB) and fibrillated cellulose, the compositions of PHB with different types and concentrations of fillers were used for the deposition of a coating on packaging paper grades, by using compression molding technique in a hydraulic press. The resulting paper coatings are demonstrated to provide a green solution for the production of protective barrier layer films with tunable hydrophobicity and oxygen barrier resistance. The processing of the nanocomposites into flat and homogeneous coatings was optimized for different conditions of molding temperature and times, in particular, the flow conditions of the coating under pressing in contact with the paper substrate strongly depends on the presence of fillers. The effects of filler types on adhesion of the coating at the paper/polymer interface were investigated and the poor adhesion of native PHB coatings was improved after hydrophobic surface modification of the nanocellulose fillers. Under compression molding, the unique inclusion styrene-maleimide nanoparticles with encapsulated wax attached to the nanocellulose fiber surface enhanced the flowing properties of the coating by eliminating fiber agglomeration in contact with the paper substrate and reducing the effects of fiber pull outs. Therefore, hydrophobic fiber modification and the role of wax as a lubricant is necessary to obtain a homogenous dispersion during compressing molding of coating materials for papers.

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Tosello, Guido. "Latest Advancements in Micro Nano Molding Technologies—Process Developments and Optimization, Materials, Applications, Key Enabling Technologies". Micromachines 13, nr 4 (13.04.2022): 609. http://dx.doi.org/10.3390/mi13040609.

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Micro and nano molding technologies are continuously being developed due to enduring trends such as increasing miniaturization and the higher functional integration of products, devices and systems [...]

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Weng, Can, Tao Ding, Mingyong Zhou, Jiezhen Liu i Hao Wang. "Formation Mechanism of Residual Stresses in Micro-Injection Molding of PMMA: A Molecular Dynamics Simulation". Polymers 12, nr 6 (17.06.2020): 1368. http://dx.doi.org/10.3390/polym12061368.

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Injection molding is an economical and effective method for manufacturing polymer parts with nanostructures and residual stress in the parts is an important factor affecting the quality of molding. In this paper, taking the injection molding of polymethyl methacrylate (PMMA) polymer in a nano-cavity with an aspect ratio of 2.0 as an example, the formation mechanism of residual stresses in the injection molding process was studied, using a molecular dynamics simulation. The changes in dynamic stress in the process were compared and analyzed, and the morphological and structural evolution of molecular chains in the process of flow were observed and explained. The effects of different aspect ratios of nano-cavities on the stress distribution and deformation in the nanostructures were studied. The potential energy, radius of gyration and elastic recovery percentage of the polymer was calculated. The results showed that the essence of stress formation was that the molecular chains compressed and entangled under the flow pressure and the restriction of the cavity wall. In addition, the orientation of molecular chains changed from isotropic to anisotropic, resulting in the stress concentration. At the same time, with the increase in aspect ratio, the overall stress and deformation of the nanostructures after demolding also increased.

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Xie, Lei, Xiao Yong Tian, Wang Qing Wu, Di Chen Li, Bing Yan Jiang i Gerhard Ziegmann. "Effect of Weld Line Defects on Electrical Conductivity of Injection Molded Parts with Carbon Nano Fibers/PP Composites". Advanced Materials Research 233-235 (maj 2011): 1136–40. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.1136.

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As well known, the weld line defect in injection molding process results detrimental to mechanical properties and surface quality. However, the electrical conductivity of the injection molded part is influenced as well. In this study, in order to reveal the mechanism of the weld line affecting the electrical conductivity of injection molding parts, the conductive polymer composites with various carbon nanofibers filling contents were compounded. Those composites were formed as the tensile samples with and without weld line defects by injection molding process. According to the electrical resistance measurements for the samples, it can be found that at relative low filling content of 10wt%, the weld line contributes to increase the electrical conductivity of the injection molding parts due to its effect on nanofibers’ orientation. However, when the filling content is higher than 20wt%, this effect is not significant any more.

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Ding, Weiwei, Yinghong Chen, Zhuo Liu i Sen Yang. "In situ nano-fibrillation of microinjection molded poly(lactic acid)/poly(ε-caprolactone) blends and comparison with conventional injection molding". RSC Advances 5, nr 113 (2015): 92905–17. http://dx.doi.org/10.1039/c5ra15402b.

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Xu, Jianlin, Bingxue Ma, Lei Niu, Chengcheng Xu, Zhou Chen i Yonggang Lin. "Study on the flame retardancy of nano-Sb2O3/BPS-PBT composites". Advanced Composites Letters 28 (1.01.2019): 096369351986574. http://dx.doi.org/10.1177/0963693519865743.

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To improve the flame retardancy of polybutylene terephthalate (PBT), PBT-based flame retardant composites containing antimony trioxide nanoparticles (nano-Sb2O3) and brominated polystyrene (BPS) were investigated. Nano-Sb2O3, BPS, and PBT were dispersed by ball milling method to obtain composite powders, and the nano-Sb2O3/BPS-PBT samples were prepared by melt blending and injection molding methods. The flame retardancy of nano-Sb2O3/BPS-PBT composites was investigated. The results showed that nano-Sbs2O3 can obviously improve the flame retardancy of PBT-based composites. When the nano-Sb2O3/BPS-PBT composite contains nano-Sb2O3 with 5 wt% of mass fraction and BPS with 10 wt% of mass fraction, the nano-Sb2O3/BPS-PBT composite has excellent flame retardancy, in which the UL94 degree of flame retardancy achieves V-0 grade and the limit oxygen index is 28.3%.

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KAKISHITA, Kenichi, Kazuaki NISHIYABU i Shigeo TANAKA. "2722 Micro Metal Injection Molding Using Hybrid Micro/Nano Powder". Proceedings of the JSME annual meeting 2006.1 (2006): 173–74. http://dx.doi.org/10.1299/jsmemecjo.2006.1.0_173.

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He, Jianqiao, Zhijian Shao, Dil Faraz Khan, Haiqing Yin, Sharon Elder, Qingjun Zheng i Xuanhui Qu. "Investigation of inhomogeneity in powder injection molding of nano zirconia". Powder Technology 328 (kwiecień 2018): 207–14. http://dx.doi.org/10.1016/j.powtec.2017.12.075.

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Oh, Joo Won, Won Sik Lee i Seong Jin Park. "Optimization of Process Condition for Fe Nano Powder Injection Molding". Journal of Korean Powder Metallurgy Institute 24, nr 3 (30.06.2017): 223–28. http://dx.doi.org/10.4150/kpmi.2017.24.3.223.

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Oh, Joo Won, Won Sik Lee i Seong Jin Park. "Nanopowder Effect on Fe Nano/Micro-Bimodal Powder Injection Molding". Metallurgical and Materials Transactions A 49, nr 11 (6.08.2018): 5535–45. http://dx.doi.org/10.1007/s11661-018-4851-5.

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Chen, Chih-Ming, Huey-Ling Chang i Chun-Ying Lee. "The Dynamic Properties at Elevated Temperature of the Thermoplastic Polystyrene Matrix Modified with Nano-Alumina Powder and Thermoplastic Elastomer". Polymers 14, nr 16 (15.08.2022): 3319. http://dx.doi.org/10.3390/polym14163319.

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The performance improvement of advanced electronic packaging material is an important topic to meet the stringent demands of modern semiconductor devices. This paper studies the incorporation of nano-alumina powder and thermoplastic elastomer (TPE) into thermoplastic polystyrene matrix to tune the thermal and mechanical properties after injection molding process. In the sample preparation, acetone was employed as a solvent to avoid the powder escape into surrounding during the mechanical mixing in a twin-screw mixer. The pressure and shear force were able to mix the composite with good uniformity in compositions. The samples with different compositions were fabricated using injection molding. The measured results showed that adding 5 wt.% of TPE into the simple polystyrene was able to raise the melt flow index from 12.3 to 13.4 g/10 min while the thermal decomposition temperature remained nearly unchanged. Moreover, the addition of small amount of nano-alumina powder could quickly improve the mechanical property by raising its storage modulus. For example, the addition of 3 wt.% of nano-alumina powder had an increase of 7.3% in storage modulus. Over doping of nano-alumina powder in the composite, such as 10 wt.%, on the other hand, lowered the storage modulus from 2404 MPa to 2069 MPa. The experimental study demonstrated that the tuning in the polystyrene’s thermal and mechanical properties is feasible by composition modification with nano-alumina powder and TPE. The better concentration of the additives should be determined according to the specific applications.

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Wu, Chih Wei, Jeou Long Lee, Yi Lin i Yung Kang Shen. "Surface Modification of Plastic Thin Film Using Anodic Aluminum Oxide Template for Nano Imprint". Key Engineering Materials 443 (czerwiec 2010): 711–16. http://dx.doi.org/10.4028/www.scientific.net/kem.443.711.

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Nano-porous anodic alumina oxide (AAO) templates are fabricated by anodizing method. The average diameter of nano-porous anodic alumina is 200 nm. The molded plastic thin film (Polycarbonate, PC) with nano-structure is fabricated by AAO as mold insert for nanoimprint. This research discusses the surface property of molded plastic thin film for different processing parameters (embossing temperature, embossing pressure, embossing time, de-molding temperature) on nanoimprint. The original contact angle of PC material without nano-structrue is about 78.2°. The contact angle of molded PC with nano-structrue is about 115.5°. The contact angle of molded plastic film (PC) with nano-structure is larger than that without nano-structure. The hydrophilic property of PC material has changed to hydrophobic property. A significant advantage of the fabrication process employed in this work is that it can create the good surface modification of plastic thin film.

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Schultz, Clayton W., Jessica X. H. Wong i Hua-Zhong Yu. "Plastic fingerprint replica: solvent-assisted 3D molding and motion-promoted nano-spherulite formation". Canadian Journal of Chemistry 96, nr 5 (maj 2018): 431–35. http://dx.doi.org/10.1139/cjc-2017-0217.

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Fingerprinting is an essential form of identification for both biometric security and forensics today. Herein, we describe the procedure and principle of creating highly resolved, chemically robust, 3D fingerprint physical replicas, which is based on the solvent-assisted molding of transparent plastics and motion-promoted growth of semi-crystalline polymeric nanostructures. Prior to fingerprinting atop, polycarbonate, a commercial polymer with excellent durability and optical transparency, is first swelled and softened with a mild solvent (acetone). The molding motion conforms polymer chains between fingerprint ridges, which facilitates the formation of semi-crystalline spherulites and results in greater opacity between ridges than underneath ridges. Besides being more enduring than digital scanning and ink printed counterparts, the plastic fingerprint replicas can provide additional morphological information (depth of the ridge) and high-level details (distribution of sweat pores).

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Yang, Jinshui, Chunqi Wang, Jingcheng Zeng i Dazhi Jiang. "Effects of nano-SiO2 on mechanical and hygric behaviors of glass fiber reinforced epoxy composites". Science and Engineering of Composite Materials 25, nr 2 (28.03.2018): 253–59. http://dx.doi.org/10.1515/secm-2014-0470.

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AbstractThe unmodified and nano-SiO2modified glass fiber reinforced polymer (GFRP) composites were prepared by the hot-compression molding process to investigate the effects of nano-SiO2on the mechanical and hygric properties of the GFRP composites. The results indicate that the nano-SiO2modification results in an increase of 9.7% and 7.9% in the tensile and flexural strength of the GFRP composites, and a decrease of 10.6% in the interlaminar shear strength (ILSS). The maximum swelling of the unmodified GFRP is 2.6 times as that of the nano-SiO2modified GFRP. The normalized-ILSS decrease of the nano-SiO2modified GFRP is only 12% after 138 days aging, while that of the GFRP reaches 31%. After 95-days hygric-aging, the decrease of the normalized flexural strength is 15.3% for the GFRP, while the normalized flexural strength of the nano-SiO2modified GFRP still maintains an increase of 5.0%. It is concluded that the nano-SiO2particle could improve the mechanical and hygric properties of the GFRP composites.

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Fang, Li Ming, Yang Leng i Ping Gao. "Effect of HA Content on Mechanical Properties of Hot Drawn HA/UHMWPE Nanocomposites for Bone Substitutes". Key Engineering Materials 334-335 (marzec 2007): 701–4. http://dx.doi.org/10.4028/www.scientific.net/kem.334-335.701.

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Hydroxyapatite reinforced ultrahigh molecular weight polyethylene (HA/UHMWPE) nanocomposites with HA volume fraction 0.1~0.5 are processed by twin-screw extrusion compounding and compression molding followed by hot drawing. SEM micrographs show that HA nano-particles are homogeneously dispersed in the highly oriented UHMWPE inter-fibrils. Tensile tests show that the modulus increases, while the strength and ductility decrease, with the increase of HA content. A good combination of mechanical properties can be obtained in the composite with HA nano-particles volume fraction 0.3.

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Motas, Justina G., Nima E. Gorji, Dumitru Nedelcu, Dermot Brabazon i Fabrizio Quadrini. "XPS, SEM, DSC and Nanoindentation Characterization of Silver Nanoparticle-Coated Biopolymer Pellets". Applied Sciences 11, nr 16 (21.08.2021): 7706. http://dx.doi.org/10.3390/app11167706.

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The development of environmentally friendly materials has been the focus of many research groups in recent years due to increased harmful effects of plastics on the environment. Bio-based materials are considered a key solution from a sustainable manufacturing perspective. The nano-coating of biopolymer blends with silver nanoparticles is the subject of challenging research projects in line with the EU Directive on environment protection and sustainable manufacturing. Coating biopolymers with silver nanoparticles provides an antimicrobial and antiviral active surface. In this work, we develop silver nanoparticle-coated biopolymer Arboblend V2 Nature pellets. The main goal is to obtain a new material with antibacterial action obtained from the blending of a biopolymer pellets with silver nanoparticles through physical vapor deposition. The study is divided in three steps. The first step represents the silver nano-coating of the Arboblend V2 Nature and the characterization of the coated/raw pellets. The second step involves the injection molding of the silver nano-coated pellets and the characterization of the samples obtained. The last step regards the press molding of the coated pellets in order to obtain thin films, as well as their characterization. The PVD-sputtering technique is used to coat the pellets with silver nanoparticles. This process is especially optimized for coating raw materials with high water content and small-size pellets. The mechanical properties, surface chemical composition and the thermal properties of the both virgin and silver nanoparticle-coated biopolymer pellets are measured and analyzed for mechanical and thermal resistance of the nano-coating layer. Differential scanning calorimetry, scanning electron microscopy, X-ray photoemission spectroscopy and nanoindentation mechanical testing is performed. The calorimetry test detects no significant alteration of the biopolymer produced from the PVD process and confirms the optimized PVD process for nano-coating of the Arboblend V2 Nature pellets with a viable application in nano-silver–biopolymer composite products.

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MARUO, Shoji. "Development of Functional Devices Using Micro/Nano Stereolithography and Molding Techniques". NIPPON GOMU KYOKAISHI 87, nr 9 (2014): 382–88. http://dx.doi.org/10.2324/gomu.87.382.

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Choi, Doo-Sun, Joon-Hyoung Lee, Yeong-Eun Yoo, Tae-Jin Je, Kyung-Hyun Whang i Young Ho Seo. "Fabrication of Nanoscale Reusable Quartz Master for Nano Injection Molding Process". Transactions of the Korean Society of Mechanical Engineers A 29, nr 2 (1.02.2005): 228–31. http://dx.doi.org/10.3795/ksme-a.2005.29.2.228.

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ITABASHI, Masami. "Nano Molding Technology(NMT) Allows Direct Bonding between Metal and Plastic". Journal of the Surface Finishing Society of Japan 66, nr 8 (2015): 359–62. http://dx.doi.org/10.4139/sfj.66.359.

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MARUO, Shoji. "F221005 Development and application of micro/nano stereolithography and molding techniques". Proceedings of Mechanical Engineering Congress, Japan 2012 (2012): _F221005–1—_F221005–3. http://dx.doi.org/10.1299/jsmemecj.2012._f221005-1.

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You, Woo-Kyung, Joon-Phil Choi, Su-Min Yoon i Jai-Sung Lee. "Low temperature powder injection molding of iron micro-nano powder mixture". Powder Technology 228 (wrzesień 2012): 199–205. http://dx.doi.org/10.1016/j.powtec.2012.05.016.

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Yu, P. C., Q. F. Li, J. Y. H. Fuh, T. Li i P. W. Ho. "Micro injection molding of micro gear using nano-sized zirconia powder". Microsystem Technologies 15, nr 3 (12.07.2008): 401–6. http://dx.doi.org/10.1007/s00542-008-0673-5.

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Rajabi, Javad, Norhamidi Muhamad i Abu Bakar Sulong. "Effect of nano-sized powders on powder injection molding: a review". Microsystem Technologies 18, nr 12 (1.08.2012): 1941–61. http://dx.doi.org/10.1007/s00542-012-1631-9.

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Park, Kyoung Hoon, Jun Hong Park i Dong Pyo Kim. "Fabrication of Nanoscale SiC-Based Ceramic Patterns with Near-Zero Residual Layers by Using Imprinting Technique and Reactive Ion Etching". Materials Science Forum 510-511 (marzec 2006): 766–69. http://dx.doi.org/10.4028/www.scientific.net/msf.510-511.766.

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Nano-scale SiC-based ceramic patterns on Si substrates were fabricated via imprint lithography technique by using viscous polyvinylsilane as a ceramic precursor and economic nano-scale master such as CD, followed by pyrolysis at 800oC under nitrogen atmosphere. The thickness of residual layers was controlled by varying the spin-coating conditions (solution concentration, spinning speed) and the patterning conditions (molding pressure). In addition, for the effective removal of the remaining residual layer, the etching kinetics of both polymeric and ceramic patterns was also comparatively studied by Ar or reactive ion etching process.

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Ding, Jie, Yingluo Zhuang, Minxian Shi, Zhixiong Huang, Yan Qin, Yan Li i Cunku Wang. "Effects of nano-ZrSi₂ on thermal stability of phenolic resin and thermal reusability of quartz–phenolic composites". Nanotechnology Reviews 11, nr 1 (1.01.2022): 3095–103. http://dx.doi.org/10.1515/ntrev-2022-0140.

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Abstract In this article, nano-ZrSi2-modified phenolic (Ph) resin and nano-ZrSi2-modified quartz–phenolic (Q–Ph) composites are, respectively, prepared by resin casting and compression molding. The effect of nano-ZrSi2 on the thermal stability of Ph resin and the role of nano-ZrSi2 on the thermal reusability of Q–Ph composites are investigated by multiple thermal gravimetric analyses and mechanical tests. The strengthening mechanism of nano-ZrSi2 modification is investigated by the evolution of microstructure. The results show that the addition of nano-ZrSi2 enhances the thermal stability of Ph resin under repeated heating at 1,200°C in air. The enhancement in thermal stability of resin exhibits a positive effect on improving the thermal reusability of composites. Within the range of 20 repeated heating times, the flexural strength of nano-ZrSi2-modified composites is above 16.01 MPa, which is 163.8% higher than that of unmodified composites. The strengthening mechanism of nano-ZrSi2 is mainly in the inhibition of thermal oxidation and the reduction of microstructural defects during the repeated thermal environment.

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Ghose, Subrata, K. A. Watson, D. M. Delozier, D. C. Working, John W. Connell, J. G. Smith, Y. P. Sun i Y. Lin. "Thermal Conductivity of Polyimide/Carbon Nanofiller Blends". Key Engineering Materials 334-335 (marzec 2007): 749–52. http://dx.doi.org/10.4028/www.scientific.net/kem.334-335.749.

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In efforts to improve the thermal conductivity (TC) of Ultem™ 1000, it was compounded with three carbon based nano-fillers. Multiwalled carbon nanotubes (MWCNT), vapor grown carbon nanofibers (CNF) and expanded graphite (EG) were investigated. Ribbons were extruded to form samples in which the nano-fillers were aligned. Samples were fabricated by compression molding where the nano-fillers were randomly oriented. The thermal properties were evaluated by DSC and TGA, and the mechanical properties of the aligned samples were determined by tensile testing. The degree of dispersion and alignment of the nanoparticles were investigated with high-resolution scanning electron microscopy. The thermal conductivity was measured in two directions using the Nanoflash technique.

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Li, Ya Na, Kyong Ho Cha i Qing Hui He. "Preparation and Properties Research of Modified Nano-ZnO/HDPE Composite Films". Advanced Materials Research 174 (grudzień 2010): 450–53. http://dx.doi.org/10.4028/www.scientific.net/amr.174.450.

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Nanocomposite films of ZnO/HDPE were prepared via melt blending and hot compression molding process. The morphology, DSC, mechanical and barrier properties of the films were investigated. The results showed that a better dispersion of modified nanoparticles at content of 0.5wt% in HDPE matrix occurred and the improvement of the HDPE films in tensile strength and tear strength was achieved by incorporating modified-ZnO nanoparticles up to 0.5wt% in contrast with the original nano-ZnO/HDPE composite films. It was also found that the addition of modified nano-ZnO to neat HDPE caused to increase crystallinity and enhance the barrier property of nano-ZnO/HDPE composite films against water vapor and oxygen.

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Guo, Wu, Zhaogang Liu, Yan Zhu i Li Li. "Fabrication of Poly(Vinylidene Fluoride)/Graphene Nano-Composite Micro-Parts with Increased β-Phase and Enhanced Toughness via Micro-Injection Molding". Polymers 13, nr 19 (27.09.2021): 3292. http://dx.doi.org/10.3390/polym13193292.

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Based on poly(vinylidene fluoride)/graphene (PVDF/GP) nano-composite powder, with high β-phase content (>90%), prepared on our self-designed pan-mill mechanochemical reactor, the micro-injection molding of PVDF/GP composite was successfully realized and micro-parts with good replication and dimensional stability were achieved. The filling behaviors and the structure evolution of the composite during the extremely narrow channel of the micro-injection molding were systematically studied. In contrast to conventional injection molding, the extremely high injection speed and small cavity of micro-injection molding produced a high shear force and cooling rate, leading to the obvious “skin-core” structure of the micro-parts and the orientation of both PVDF and GP in the shear layer, thus, endowing the micro-parts with a higher melting point and crystallinity and also inducing the transformation of more α-phase PVDF to β-phase. At the injection speed of 500 mm/s, the β-phase PVDF in the micro-part was 78%, almost two times of that in the macro-part, which was beneficial to improve the dielectric properties. The micro-part had the higher tensile strength (57.6 MPa) and elongation at break (53.6%) than those of the macro-part, due to its increased crystallinity and β-phase content.

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Yan, Kui, Wei Guo, Huajie Mao, Qing Yang i Zhenghua Meng. "Investigation on Foamed PP/Nano-CaCO3 Composites in a Combined in-Mold Decoration and Microcellular Injection Molding Process". Polymers 12, nr 2 (7.02.2020): 363. http://dx.doi.org/10.3390/polym12020363.

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A combined in-mold decoration and microcellular injection molding (IMD/MIM) method has been used in this paper. The foamed PP/nano-CaCO3 composites were prepared to investigate their mechanical properties, cellular structure, and surface quality. The content of nano-CaCO3 varied from 0 to 10 wt %. The results showed that nano-CaCO3 acted as a reinforcing phase and nucleating agent, which help to improve the mechanical properties of foamed composites. The cellular structure and mechanical properties were optimum when the nano-CaCO3 content was 6 wt %. In the vertical section, the cell size and density of transition layer on the film side was bigger than that on the non-film side. In the parallel section, the cell ratio of length to diameter of transition layer on the film side was smaller than that on the non-film side, and the cell tile angle was larger than that on the non-film side. With nano-CaCO3 content increasing, the surface quality showed a trend of decreasing first and then increasing.

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Qiu, Baojin, i Xun Xu. "Application of 3D Printing Technology and Porous Nano-Ceramic Decorative Sheet in Interior Landscape Design". International Journal of Analytical Chemistry 2022 (8.11.2022): 1–7. http://dx.doi.org/10.1155/2022/8715211.

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In order to solve the problems that the traditional ceramic method is difficult to form porous ceramics with complex structures, the mold production cycle is long, and the cost is high, the authors propose the application of 3D printing technology and porous nano-ceramic decorative sheet in interior landscape design. Based on the use of photocuring molding technology to make high-precision regular resin molds, optimize the low-viscosity, high-solid content alumina ceramic slurry required by the gel injection molding process and form alumina ceramic blanks by means of a vacuum pressure process, so as to realize the net shape of complex structural porous ceramic parts. In view of the filling problem of ceramic slurry in complex structure in the process, the effects of slurry pH value, dispersant dosage, and vacuum pressurization process on ceramic molding were studied, and parameters such as porosity and compressive strength of the green body were tested. Experimental results show the following. Under the conditions of pH value of 9, mass fraction of dispersant of 0.4%, and vacuum pressure of 90 min, alumina ceramics with a volume fraction of 52% can be prepared, the porosity is 51.5%, and the compressive strength is 40.1 MPa. The ceramic material prepared by this process has complete structure and smooth surface and can be used as a process for preparing porous ceramic parts with complex structure.

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Sun, Chun Feng, i Ming Gao. "Effect of Nano-Calcium Carbonate on the Mechanical Properties of Polypropylene". Applied Mechanics and Materials 665 (październik 2014): 343–47. http://dx.doi.org/10.4028/www.scientific.net/amm.665.343.

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The task of the polymer physics experiment course is using a certain percentage of nanocalcium carbonate (CaCO3) to composite polypropylene (PP) and using a twin-screw injection molding machine to inject the compound above into a standard sample. After that some mechanical properties test were made to get some nanocalcium carbonate data which may affect the mechanical properties of polypropylene.

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