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Thematische Bibliographien / Wettability of plastics

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Zeitschriftenartikel
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Buchteile
Konferenzberichte

Auswahl der wissenschaftlichen Literatur zum Thema „Wettability of plastics“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 9. Februar 2022

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Zeitschriftenartikel zum Thema "Wettability of plastics"

1

NAGAI, Yoshinae, und Takao YAKOU. „Wettability of wood and biodegradable plastics“. Proceedings of Conference of Kanto Branch 2004.10 (2004): 471–72. http://dx.doi.org/10.1299/jsmekanto.2004.10.471.

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2

Fujinami, Akinori, Daisuke Matsunaka und Yoji Shibutani. „Water wettability/non-wettability of polymer materials by molecular orbital studies“. Polymer 50, Nr. 2 (Januar 2009): 716–20. http://dx.doi.org/10.1016/j.polymer.2008.11.050.

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3

Hirai, Yuji, Hiroyuki Mayama, Riku Tamura, Yasutaka Matsuo, Takahiro Okamatsu, Toshihiko Arita und Masatsugu Shimomura. „Microstructured rubber and its wettability“. Polymer Journal 51, Nr. 8 (22.04.2019): 721–30. http://dx.doi.org/10.1038/s41428-019-0192-5.

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4

Allen, K. W. „Contact angle, wettability and adhesion“. International Journal of Adhesion and Adhesives 14, Nr. 1 (Januar 1994): 69. http://dx.doi.org/10.1016/0143-7496(94)90024-8.

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5

Pastore Carbone, Maria Giovanna, Daniele Tammaro, Anastasios C. Manikas, George Paterakis, Ernesto Di Maio und Costas Galiotis. „Wettability of graphene by molten polymers“. Polymer 180 (Oktober 2019): 121708. http://dx.doi.org/10.1016/j.polymer.2019.121708.

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6

Boruvka, Martin. „Anisotropic Wetting Behavior on Injection Molded Polypropylene Parts Inspired by Surface Structure of Moss“. Applied Mechanics and Materials 752-753 (April 2015): 168–71. http://dx.doi.org/10.4028/www.scientific.net/amm.752-753.168.

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During the last years the carmakers interest is focused on polymer manufacturers to develop breakthrough solutions addressing the key drivers of reducing weight and cost. The use of polypropylene (PP) and other thermoplastic olefins is growing because of their low cost and good properties. Unfortunately, some of the same properties that make these plastics attractive to designers, also make them difficult to bond with adhesives or varnish. Non-polar character of PP results in poor surface properties and low wettability. Several methods of surface pretreatments have been used to improve its wettability, but all involves cost extending additional processing. Based on lessons from nature, one of the ways how to increase wettability is surface structuring. Injection mold insert designing and manufacturing process inspired by hydrophilic structure of the moss is presented. Due to cost reducing demands were used conventional processing methods.

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Mohammed-Ziegler, Ildikó, Zoltán Hórvölgyi, András Tóth, Willis Forsling und Allan Holmgren. „Wettability and spectroscopic characterization of silylated wood samples“. Polymers for Advanced Technologies 17, Nr. 11-12 (2006): 932–39. http://dx.doi.org/10.1002/pat.778.

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8

Gomes, Cristina M., M. Helena Ad�o, Benilde J. V. Saramago und Anabela C. Fernandes. „Wettability of cellular polyurethane“. Journal of Polymer Science Part B: Polymer Physics 35, Nr. 3 (Februar 1997): 407–14. http://dx.doi.org/10.1002/(sici)1099-0488(199702)35:3<407::aid-polb1>3.0.co;2-p.

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9

Lee, Min-Jae, Seon-Young Park und A.-Young Sung. „Characterization of Biocompatible Hydrogel Lenses Using Methacrylic Acid with Neodymium Oxide Nanoparticles“. Polymers 13, Nr. 10 (14.05.2021): 1575. http://dx.doi.org/10.3390/polym13101575.

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We prepared hydrogel contact lenses containing nanoparticles of neodymium oxide and methacrylic acid (MA) to investigate their effect on the physical and chemical properties of the lens. Neodymium oxide nanoparticles improved the tensile strength without affecting wettability. The tensile strength, wettability, and light transmittance were all increased when MA was added in a specific ratio. To confirm the safety of the newly used nanoparticles, test on absorbance, eluate, and pH change were conducted and it was found that the safety level was satisfactory. In conclusion, it was confirmed that durable contact lenses can be manufactured with neodymium oxide nanoparticles, and most of the basic elements of the lens such as transparency, strength, and wettability could be improved using MA, which is a hydrophilic material. It is believed that the study will be helpful as part of basic research to use new materials.

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Wagner, Natalie, und Patrick Theato. „Light-induced wettability changes on polymer surfaces“. Polymer 55, Nr. 16 (August 2014): 3436–53. http://dx.doi.org/10.1016/j.polymer.2014.05.033.

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Dissertationen zum Thema "Wettability of plastics"

1

Chow, Ping-Sheng. „Separation of mixed plastics by flotation“. Thesis, University of Nottingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318720.

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Ermis, Martin. „Odstraňování mikroplastů z vody“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444298.

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This thesis deals with the occurrence of microplastics in water, the reasons for their potential elimination, and the possibilities leading to that. More specifically, it focuses on flotation as a process for removing microplastics from water. Flotation is further described from a theoretical point of view and its mathematical model is developed. The wettability of selected polymers is measured. The experiment performed to determine the efficiency of flotation as a process of treating water from microplastics is described. This efficiency is further compared to measured wettability.

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Tabibian, Seyedshayan. „Étude expérimentale et modélisation de réacteurs à lit fluidisé de type Wurster couplés à des jets de plasma à pression atmosphérique pour le traitement de surface de particules“. Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUS382.

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Les particules de polypropylène sont utilisées à diverses fins. Cependant, les bonnes propriétés mécaniques du PP sont contrebalancées par une faible mouillabilité. La mouillabilité des particules de PP a donc été améliorée par un traitement par jet de plasma à la pression atmosphérique dans un réacteur à lit fluidisé Wurster. L'énergie libre de surface des particules de PP déterminée par la méthode de Zisman a augmenté de 30,7 mN/m à 38,6 mN/m après 120 secondes de traitement. Les résultats XPS ont montré une augmentation de 5% de la concentration atomique en oxygène à la surface des particules traitées. Un modèle turbulent k-ε a été utilisé pour déterminer le champ de vitesse, de pression et de température de la phase gazeuse à l'intérieur du réacteur. De plus, un modèle CFD multiphasique eulérien-eulérien a été ajouté pour déterminer la dynamique des particules à l'intérieur du réacteur et les résultats ont été comparés à des mesures rapides d'imagerie, de thermocouple et d'anémométrie. Ces études sont très importantes pour contrôler l'homogénéité des traitements des particules, déterminer le temps de traitement effectif moyen de chaque particule et éviter une surchauffe du PP thermosensible. Nous avons également étudié la possibilité d’utiliser des plasmas hors d’équilibre pour décontaminer les particules de poivre en lit fluidisé. En effet, ce plasma est caractérisé par la formation d'espèces réactives de l'oxygène et de l'azote, des UV et des températures élevées; ce dernier est évidemment un problème pour la médecine plasmatique, mais pas pour traiter des objets non vivants, spécialement ceux contenant des microorganismes très résistants tels que les spores
Polypropylene particles are used for various purposes, however, the good mechanical properties of PP are counterbalanced by a poor wettability. The wettability of PP particles was therefore improved by an atmospheric pressure blown-arc air plasma jet treatment in a new designed homemade Wurster fluidized bed reactor. This reactor, was used to treat 200 g of particles per batch. The surface free energy of PP particles determined by the Zisman method showed an increase from 30.7 mN/m to 38.6 mN/m after 120s of treatment. XPS results showed a 5% increase of the atomic concentration of oxygen on the surface of the treated particles. In order to describe the process, a 2D axisymmetric non-isothermal k-ε turbulent model was used to determine the velocity field, pressure and temperature profile of the gas phase inside the reactor. Furthermore an Eulerian-Eulerian multiphasic CFD model was added to determine the dynamics of the particles inside the reactor, and the results were compared with fast imaging, thermocouple and anemometry measurements. These investigations are very important to monitor the homogeneity of the particle treatments, to determine the average effective treatment time for each particle and to avoid overheating of thermally sensitive PP. We also studied the possibility to use non-equilibrium plasmas to decontaminate peppercorn particles in a fluidized bed. Indeed, this plasma is characterized by the formation of Reactive Oxygen and Nitrogen Species, UV and high temperature; the latter is obviously a problem for plasma medicine, but is not a problem to treat non-living objects, specially containing highly resilient microorganisms such as spores

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Buchteile zum Thema "Wettability of plastics"

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Zarras, Peter, Paul A. Goodman und John D. Stenger-Smith. „Functional Polymeric Coatings“. In Research Perspectives on Functional Micro- and Nanoscale Coatings, 78–104. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-5225-0066-7.ch004.

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Functional polymeric coatings comprise a diverse array of organic/inorganic functional groups, properties, and applications. This chapter attempts to provide a comprehensive review on the science and engineering of functional polymer coatings for both the novice and experienced chemist/chemical engineer. Functional polymer coatings are coatings that are designed through careful selection of organic/inorganic functional groups and controlled synthesis on the substrate's surface. The design leads to changes in the surface properties (e.g., adhesion, wettability, corrosion resistance, wear resistance, anti-fouling, non-stick, and anti-scratch) of a particular substrate (metal, glass, wood, or plastic). Functional polymeric coatings represent the “next generation” of coatings. These coatings dynamically respond to their environment, as opposed to a static coating that is used as a simple barrier, or for decorative purposes. This review is divided into three sections: (1) functionalization of polymers, (2) polymer properties and surface analytical techniques, and (3) applications.

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Zarras, Peter, Paul A. Goodman und John D. Stenger-Smith. „Functional Polymeric Coatings“. In Materials Science and Engineering, 648–74. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-1798-6.ch026.

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Functional polymeric coatings comprise a diverse array of organic/inorganic functional groups, properties, and applications. This chapter attempts to provide a comprehensive review on the science and engineering of functional polymer coatings for both the novice and experienced chemist/chemical engineer. Functional polymer coatings are coatings that are designed through careful selection of organic/inorganic functional groups and controlled synthesis on the substrate's surface. The design leads to changes in the surface properties (e.g., adhesion, wettability, corrosion resistance, wear resistance, anti-fouling, non-stick, and anti-scratch) of a particular substrate (metal, glass, wood, or plastic). Functional polymeric coatings represent the “next generation” of coatings. These coatings dynamically respond to their environment, as opposed to a static coating that is used as a simple barrier, or for decorative purposes. This review is divided into three sections: (1) functionalization of polymers, (2) polymer properties and surface analytical techniques, and (3) applications.

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„Can contact angle measurements be used to predict soiling and cleaning of plastic flooring materials?“ In Contact Angle, Wettability and Adhesion, Volume 4, 215–26. CRC Press, 2006. http://dx.doi.org/10.1201/b12166-15.

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4

„Effect of grafting efficiency on peel strength, contact angle, particle size and viscosity of butyl acrylate–PUD hybrid adhesives for plastic laminates“. In Contact Angle, Wettability and Adhesion, Volume 5, 247–60. CRC Press, 2008. http://dx.doi.org/10.1201/b12144-18.

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Konferenzberichte zum Thema "Wettability of plastics"

1

Bai, Zongwu, Garth B. Wilks, Gyaneshwar P. Tandon, Brandon J. Yocum und Ryan S. Justice. „Functional Silver Nanoink for Direct Write Applications“. In ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/smasis2012-7922.

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Direct write (DW) technology offers a simple method of rapid manufacturing technology for printing electronic, optoelectronic devices, and complex functional devices. The key component of DW technology is the functional inks, which are colloidal suspensions of functional nanoparticles in various solvents such as aerosol or liquid form. With a DW approach, patterns or structures can be easily deposited on flexible substrates such as paper, plastics, and composites, once the solvent volatilizes or is driven off via conventional, laser, or microwave sintering. In this work, polymer-assisted silver (Ag) nanoinks were synthesized by silver salt and polymer in the water solution at relatively high silver precursor concentrations and relatively low concentration of polymers. The silver nanoparticle dispersion and morphology was examined by dynamic light scattering (DLS) and transmission electron microscopy (TEM). The results showed that the size of Ag nanoparticles was in nanoscale (∼20 nm) with a narrow distribution of Ag nanoparticle sizes. The viscosity and thermal properties of synthesized silver nanoinks were characterized to determine their applicability and the lifetime. It has been shown that the synthesized silver nanoink can be printed on a flexible plastic substrate or glass substrate. The morphology of the Ag nanoink line printed on the substrate was observed by optical microscopy and scanning electron microscopy (SEM) to understand the relationship between the microstructure and wettability. Uniaxial tension tests of silver nanoink line on a Kapton film indicate that the ink can be stretched ∼20% without failure. The resistance of silver nanoink line printed on the Kapton films was also measured by four probe conductivity measurement system to assess the electrical performance. The resistivity is about 7.5 × 10−5 Ω-cm by thermal treatment at 250°C for 30 min, which is about half that of bulk silver (1.6 × 10−6 Ω-cm). Overall, the performance of the synthesized silver nanoink is comparable to a commercially available ink with lower Ag weight content at relatively low cost.

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Peng, Fei, Can Yang, Chunbo Li, Huan Yang und Xiao-Hong Yin. „Material Dependent Laser-Induced Patterns for Metal-Plastic Hybrids Directly Jointed Using Injection Molding“. In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-24540.

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Abstract In the present work, the nanosecond-pulsed laser micro machining was applied to induce surface patterns with three different metals (i.e., titanium, aluminum as well as magnesium alloys) for producing metal-plastic hybrid (MPH) joints by injection molding. Specifically, laser variables such as the scanning speed, laser frequency, and scan repetition were altered to obtain different surface patterns. The surface morphologies were observed using scanning electron microscope (SEM). It’s found from SEM observations that due to the thermal ablation of the laser, micro patterns such as grooves and protrusions exist on all metal surfaces. However, distinct morphologies can be seen for different metals, with the most variable microstructures for the titanium alloy. Moreover, the surface wettability to the distilled water for all metal surfaces was examined with a contact angle measuring instrument. It’s shown that the contact angle characterizing the surface hydrophilicity is not necessarily related to process condition but surface morphologies. The tensile tests of the injection molded MPH joints showed that the titanium alloy surfaces with bumpy morphology facilitated forming micro-scale mechanical interlocking between the metal and the plastic, leading to enhanced MPH joint strength.

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Benabdallah, Habib S., und Jianjun J. Wei. „Effects of Lubricants on the Friction and Wear Properties of PTFE and POM“. In ASME/STLE 2004 International Joint Tribology Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/trib2004-64028.

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The friction and wear properties of PTFE and POM were investigated using a ball-on-steel ring tester under dry conditions and conditions lubricated by paraffin and 10W-30 oils. SEM, EDAX, FT-IR and surface wettability techniques were used to characterize and assess the morphology and chemical composition of the original surfaces as well as wear track, transfer film and wear debris for different loads and speeds. Although the friction was high, similar behaviours to those reported were observed. The experimentally determined surface temperature of the plastic revealed optimum loading levels for each sliding speed at which the friction and wear rates become minimal and the thermal effect stabilizes. In boundary-like lubrication using both oils, friction and wear were significantly reduced with the exception of an increase in wear rate with load when POM was lubricated with 10W-30 oil. Surface analysis revealed that the formation of lubricious protective layers on the surfaces in contact is crucial to reducing friction and more importantly wear. FT-IR results confirmed that film transfer occurs in the case of POM.

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Hsieh, W. F., Henry Lin, Vincent Chen, Jun Liu, Irene Ou und Y. S. Lou. „The Investigation of Oven Contamination and Corresponding Methodology“. In ISTFA 2019. ASM International, 2019. http://dx.doi.org/10.31399/asm.cp.istfa2019p0426.

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Abstract Contamination and particle reduction are critical to semiconductor process control. Lots of failure analysis had been focused on finding the root cause of the particle and contamination. The particle and contamination effect were also easily found in circuit probing (CP) process, and therefore induced yield loss and wafer scrap. In the first part of this paper, an oven contamination case was studied. The second part of this paper focus on oven contamination monitoring. In the beginning, a die flying failure was papered at the stage of blue tape and die sawing. This event clearly indicated bad adhesion between die and plastic tape. This bad adhesion was suspected to be a particle/contamination layer formed on bad die surface. Three failure analysis (FA) approaches were performed to find out the root cause. The SEM/EDS result identified the main elements of big particle, but that is insufficient to identify the root cause. The OM/FTIR, however, showed the contamination may be related to polydimethylsiloxane (PDMS). The last failure analysis was the time of fly Secondary Ion Mass Spectrometer (TOF-SIMS), the result confirmed that there was a thin PDMS layer formed on the contaminated bad die surface. The high temperature CP process induced PDMS is believed to be the contamination root cause. In order to prevent the oven contamination event, a methodology based on contact angle and wettability of Si matrix sample was set up for regular monitor in oven operation. The details of contact angle test (CAT) sample preparation, measurement and analysis results were also discussed in this paper.

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Zhong, Hanyi, Xiangzheng Kong, Zhengsong Qiu, Weian Huang, Xianbin Zhang und Chong Zhao. „Effect of Nano Carbon Spheres on the Properties of Oil-Based Drilling Fluids under High Temperature Conditions“. In International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21404-ms.

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Abstract Owing to superior temperature stability in comparison with water-based drilling fluids, oil or synthetic-based drilling fluids are generally preferred for high temperature and high pressure (HTHP) formations. However, the thermal degradation of emulsifiers and polymeric components under HTHP conditions that results in loss of rheological and filtration control, barite sag or even fluid phase separation also occurs. It is a challenge to sustain these properties stable under such harsh condition. Since nanoparticles have potential to provide better thermal stability, improved filtration loss as well as emulsion stability, the aim of this study is to investigate the effect of nano carbon spheres on the properties of oil-based drilling fluids under high temperature conditions. The nano carbon spheres were synthesized with the hydrothermal reaction of glucose. The influence of nano carbon spheres on the rheological, filtration, emulsion stability, settlement stability, as well as lubricity of a typical mineral oil-based drilling fluid with oil to water ratio of 80:20 was investigated before and after thermal aging at 180 and 200°C, respectively. The structure characterization showed that the uniform hard nano carbon spheres exhibited intermediate wettability. Laboratory performance test indicated that, for the oil-based drilling fluid, the addition of nano carbon spheres improved the rheological properties in terms of yield point and the ratio of yield point to plastic viscosity, which is beneficial for transporting of drilling cuttings. After thermal aging at 200 °C, the filtration loss volume was reduced as high as 70%, and desirable filter cake quality was obtained by incorporation of 1.0 wt% spheres, meanwhile the electrical stability was improved both before and after thermal aging. Furthermore, the fluid formulated with the nano carbon spheres generated better barite sag control. The polarizing microscope observation showed that the nano carbon spheres accumulated at the water-oil interface and formed a steric barrier which probably explained the reason of the above enhanced performance. The green synthetic routes and environmental friendly characteristics of the nano carbon spheres, in combination with the excellent properties suggested that the nano carbon spheres hold potential as multi-functional additives for formulating oil-based drilling fluids for HTHP drilling operations.

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Zhang, Qingwei, Ioannis Neitzel, Vadym N. Mochalin, Isabel Knoke, David M. Wootton, Yury Gogotsi, Peter I. Lelkes und Jack G. Zhou. „PLLA-Nanodiamond Composites and Their Application in Bone Tissue Engineering“. In ASME 2010 First Global Congress on NanoEngineering for Medicine and Biology. ASMEDC, 2010. http://dx.doi.org/10.1115/nemb2010-13336.

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Nanodiamond (ND) is an attractive nanomaterial for reinforcement of polymers [1] due to the ND’s superior mechanical and chemical properties, and low biotoxicity. A novel composite material has been produced for bone scaffolds utilizing the biodegradable polymer, poly(L-lactic acid) (PLLA), and octadecylamine-functionalized nanodiamond (ND-ODA) [2]. Composites were prepared by admixing to a PLLA/chloroform solution chloroform suspensions of ND-ODA at concentrations of 0, 1, 3, 5, 7, and 10 (w/w). Dispersion of ND-ODA in the composites was studied by transmission electron microscopy (TEM). The lower-resolution TEM micrograph of 1% wt ND-ODA/PLLA film (Fig. 1a) shows nanodiamond particles dispersed in PLLA film on amorphous carbon support. Due to long hydrocarbon chains of ODA the ND-ODA particles have good wettability with the PLLA so there is no segregation of ND-ODA and PLLA, and the polymer completely surrounds the particles. The high-resolution TEM image (Fig. 1b) shows ND crystals with attached organic material that can be ODA or PLLA. Nanoindentation tests show that the mechanical strength of ND-ODA/PLLA composites improves upon addition of ND (Table 1). Even at low concentrations (1% wt) the ND-ODA increased the hardness of the composite by 60% and Young’s modulus by 20% over neat PLLA. Based on our preliminary observations, we conclude that further additions of ND-ODA resulted in smaller changes with subsequent saturation in the mechanical properties at ∼7% wt (see Table 1). ND is relatively novel nanomaterial. Establishing its biocompatibility requires further studies, especially for modified ND. We studied the biocompatibility of 5–10nm ND and ND-ODA in experiments with a murine osteoblast cell line (7F2, from ATCC). Incubation of a cultured osteoblasts with 1–100μg/ml of ND or ND-ODA particles for 4 hours did not show much influence on the cell viability (Fig. 2), as inferred from an alamarBlue™ assay. To test the feasibility of ND-ODA/PLLA as a matrix material supporting cell growth, osteoblasts were cultured on the composites for 6 days. The attactment and proliferation of 7F2 cells on the scaffolds were assessed, respectively, by fluorescent nuclear staining with Hoechst 33258 and the alamarBlueTM assay. Our results showed that the addition of ND-ODA had only a negligibly small effect on cell proliferation, which is indicative of good biocompatibility of the composites (Fig. 3). The morphology of 7F2 cells growing on all ND-ODA/PLLA composite scaffolds was assessed by SEM. The data (not shown) confirm that the osteoblasts spread on the scaffolds similar to their spreading on TCP (tissue culture plastic). To summarize, the improved mechanical properties of the PLLA/ND-ODA composites and their good biocompatibility suggest that these materials may be suitable for applications in musculoskeletal tissue engineering.

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