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Mackenzie, John D.; Bescher, Eric P.

doi:10.1023/a:1022659323517

Cited by 72 publications

(22 citation statements)

References 17 publications

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“…[1,2] Among these applications, metal oxide coating on polymers is a rapidly expanding technology that can be used as a protective layer for medical devices and a gas barrier layer film for food and pharmaceutical packaging applications. [3][4][5][6] There are two common methods used to deposit thin films of a variety of metal oxides: vacuum and atmosphericbased coating techniques. Vacuum coating techniques can be divided into three categories: physical vapor deposition (PVD), chemical vapor deposition (CVD), and atomic layer deposition (ALD).…”

Section: Introductionmentioning

confidence: 99%

“…Plasma-assisted CVD and ALD permit the production of metal oxide coatings on polymers at relatively low pressures and temperatures, but they are still expensive and cumbersome, especially for coating large areas. [4,9,10] On the other hand, atmospheric-based coating techniques consist of applying a chemical solution followed by thermal or UV curing. The sol-gel method is one atmospheric-based deposition technique for preparation of metal oxide coatings.…”

Section: Introductionmentioning

confidence: 99%

“…In the literature, there are many investigations of metal oxide coatings on polymers such as polycarbonates (PC), poly(ethylene terephthalate) (PET), poly(methyl methacrylate) (PMMA), polydimethylsiloxane (PDMS), polyimide, poly(propylene) (PP), etc. [4,6,[15][16][17] While in most of these studies, silicon oxide (SiO x ) was deposited on the polymers, aluminum oxide (AlO x ) has received little attention. Yet, AlO x has remained one of the most widely used metal oxides for nonpolymeric surfaces due to its combination of wear resistance, high thermal and chemical stability, and electrical resistivity.…”

Section: Introductionmentioning

confidence: 99%

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Poly(lactic acid)/Aluminum Oxide Composites Fabricated by Sol‐Gel and Melt Compounding Processes

Yüzay

Auras

Selke

2010

Macro Materials & Eng

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Aluminum‐oxide‐coated PLA pellets, particles derived from aluminum oxide sol‐gel, and calcinated α‐Al2O3 powders were used to fabricate PLA/AlOx composites. The formation of aluminum oxide was confirmed by FTIR and EDS. SEM images suggested the melt compounding system provided a fairly homogeneous dispersion of AlOx particles in the PLA matrix. XRD analysis showed PLA and PLA/AlOx composites were both amorphous. The incorporation of AlOx particles did not alter the melting temperature of PLA. However, the shape and intensity of the melting endotherms was significantly changed, suggesting bimodal melting behavior. UV‐Vis transmission spectra suggested that PLA/AlOx composites may act as a better UV barrier than neat PLA.magnified image

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Poly(lactic acid)/Aluminum Oxide Composites Fabricated by Sol‐Gel and Melt Compounding Processes

Yüzay

Auras

Selke

2010

Macro Materials & Eng

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“…However, despite the advantages above mentioned, it still has limitations to be overcome for the real application in terms of surface hardness, impact strength, abrasion resistance and long term transparency. 3,4 Especially for the application to window of cellular phone, which is always exposed to atmosphere, abrasion damages and scratch should be minimized by coating with improved hardness. Hard coating process can be classified to two categories; thermal curing process using silicone compounds for the functionalization of the coating layer and UV-curing process using acrylic compounds for process ease.…”

Section: Introductionmentioning

confidence: 99%

Organic-inorganic hard coating layer formation on plastic substrate by UV curing process

Lee

Kim

2010

Macromol. Res.

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Efficient methods for making organic-inorganic hard coating layers on a polymethylmethacrylate substrate were developed and optimized to improve the mechanical and optical properties. Colloidal silica was coupled with methacryloxypropyltrimethoxysilane to make Si-O-Si bonds before incorporating them into the organic phase of the monomer and oligomer. A combination of photoinitiators with different absorption bands could utilize the UV light throughout the entire wavelength range to show better curing results than the case of a single photoinitiator with a limited absorption band. The effects of the photoinitiator in terms of the mixing ratio and concentration in the coating solution were examined and optimized. The UV curing reactivity was improved using a mixture of different initiators with different absorption bands, and 4:1 ratio mixture of Irgacure 184 and Irgacure 907 showed the best hard coating properties, such as hardness and impact strength. The optimum initiator content was determined to be 5 wt% in the hard coating solution. However, too much initiator resulted in excessive primary radical reactions of the monomers, and the competition of primary radicals reduced the conversion and initiator efficiency.

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“…7,8 O-I hybrids containing SiO 2 , TiO 2 , ZrO 2 , and CaCO 3 have been produced by the sol-gel process, which involves hydrolysis and condensation reactions, usually starting from mixtures of metal alkoxides and suitably functionalized metal alkoxysilanes. [3][4][5][6]9 In recent years, we have begun studies on the preparation of hybrids by a dual-curing process, involving a UV-induced reaction followed by the hydrolysis and condensation of metal alkoxide groups to produce the inorganic network. 10−12 Pursuing this research, we focused on the preparation of O-I hybrid epoxy coatings by cationic UV curing, using low T g epoxy resin in tetraethoxysilane (TEOS) mixed with glycidoxypropyltrimethoxysilane as a coupling agent.…”

Section: Introductionmentioning

confidence: 99%

Epoxy–siloxane hybrid coatings by a dual‐curing process

et al. 2009

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Coatings based on a hybrid organic-inorganic epoxy system were prepared by a dual-curing mechanism, via cationic photopolymerization in the first step at room temperature and a subsequent hydrolysis/condensation reaction of a trialkoxy-silane compound (sol-gel process) at high temperature. To this end, a high T g epoxy resin (3,4-epoxycyclohexylmethyl-3 -cyclohexenylmethyl adipate, UVR 6128) was added in increasing amounts to a precursor for the inorganic-like phase (3,4-epoxycyclohexylethyltrimethoxysilane, EETMOS). The mixture contained triphenylsulfoniumhexafluoroantimonate as a cationic photoinitiator. By this method, the strongly acid environment generated by the photolysis of the triarylsolfunium salt in the first step induces the hydrolysis of EETMOS alkoxy-silane groups. The films produced in the first step of the process were thermal treated to promote the condensation reactions of the siloxane moieties. The kinetics of the reactions of photopolymerization and condensation was investigated. It was found that the presence of EETMOS increases both the polymerization rate and the final consumption of epoxy groups. Thermogravimetric analyses performed in air have revealed an increased stability of the hybrid coatings with respect to the films produced from formulations without EETMOS. A significant increase in surface hardness was also observed for the hybrid coatings. The thermo-mechanical properties were found to be strongly affected by the temperature used in the thermally induced reactions in the second step. The hybrid coatings on a low-density polyethylene substrate were found to decrease the diffusivity of oxygen and to increase the oxygen solubility within the coating.

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Cited by 72 publications

References 17 publications

Poly(lactic acid)/Aluminum Oxide Composites Fabricated by Sol‐Gel and Melt Compounding Processes

Poly(lactic acid)/Aluminum Oxide Composites Fabricated by Sol‐Gel and Melt Compounding Processes

Organic-inorganic hard coating layer formation on plastic substrate by UV curing process

Epoxy–siloxane hybrid coatings by a dual‐curing process

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