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Optically Transparent Protective Coating for Plastics Using Dual Spray and Atmospheric Plasma Deposition
Advanced Materials Interfaces ( IF 5.4 ) Pub Date : 2018-02-26 , DOI: 10.1002/admi.201701433
Yichuan Ding 1 , Siming Dong 1 , Jiahao Han 1 , Dongjing He 1 , Zhenlin Zhao 1 , Reinhold H. Dauskardt 1
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The successful processing of bilayer protective coatings on plastics using a combined spray and atmospheric plasma deposition method is shown. The base layer is a spray deposited coating with high adhesion using (3‐glycidyloxypropyl) trimethoxysilane and tetrapropyl zirconate (TPOZ) precursors. The top dense layer is deposited by atmospheric plasma deposition with a tetraethyl orthosilicate precursor. The coating deposition rate, chemical composition, elastic modulus, hardness, and adhesion to poly(methyl methacrylate) (PMMA) substrates are investigated. The adhesion to the polymer substrate is found to decrease with increasing TPOZ content in the precursor solution, while the elastic modulus and hardness of the base layer increase. A silane surface pretreatment of the PMMA substrate is shown to significantly increase the coating adhesion. The adhesion of the optimized coating is so high that it forces the debond interface change from adhesive failure at the coating/PMMA interface to cohesive failure within the PMMA substrate. The combined bilayer structure exhibits a >90% transparency in the visible wavelengths, eightfold increase in adhesion energy and fourfold increase in Young's modulus compared to commercial sol–gel polysiloxane coatings. The approach provides a strategy for an unprecedented combination of adhesion and mechanical properties.

中文翻译:

使用双喷涂和大气等离子沉积技术的塑料光学透明保护膜

显示了使用组合的喷涂和大气等离子沉积方法成功处理塑料上的双层保护涂层的过程。基层是使用(3-环氧丙氧基丙基)三甲氧基硅烷和锆四丙基(TPOZ)前体的高附着力喷涂层。通过大气等离子体沉积用原硅酸四乙酯沉积顶部致密层。研究了涂层的沉积速率,化学成分,弹性模量,硬度以及对聚甲基丙烯酸甲酯(PMMA)基材的附着力。发现在前体溶液中,随着TPOZ含量的增加,与聚合物基材的粘合性降低,而基础层的弹性模量和硬度则提高。PMMA基材的硅烷表面预处理显示可以显着提高涂层的附着力。优化涂层的粘附力是如此之高,以至于它迫使脱胶界面的变化,从涂层/ PMMA界面处的粘合破坏到PMMA基材内的内聚破坏。与商用溶胶-凝胶聚硅氧烷涂料相比,组合的双层结构在可见光波长下具有> 90%的透明度,粘合能增加8倍,杨氏模量增加4倍。该方法提供了前所未有的粘合力和机械性能组合的策略。与商用溶胶-凝胶聚硅氧烷涂料相比,其粘合能增加了8倍,杨氏模量增加了4倍。该方法提供了前所未有的粘合力和机械性能组合的策略。与市售的溶胶-凝胶聚硅氧烷涂料相比,附着力提高了8倍,杨氏模量提高了4倍。该方法提供了前所未有的粘合力和机械性能组合的策略。
更新日期:2018-02-26
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