Roll-to-roll thin film coating on fluoropolymer webs - Status, challenges and applications
Roll-to-roll thin film coating on fluoropolymer webs - Status, challenges and applications
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DOI：
10.1016/j.surfcoat.2016.11.106
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发表时间：
2017-03-25
影响因子：
5.4
通讯作者：
Amberg-Schwab, Sabine
中科院分区：
文献类型：
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作者：
Fahlteich, John;Steiner, Cindy;Amberg-Schwab, Sabine
在含氟聚合物网上的薄膜沉积-在真空和大气压下-面临几个关键的挑战，例如差的机械和热机械性能-特别是低尺寸稳定性和低弹性模量，高和纹理表面粗糙度和低附着力的薄膜。本文讨论了关键的工艺参数，在辊到，对于含氟聚合物幅材的独特性能而言，真空工艺和湿涂工艺的辊加工。反应性溅射氧化物层以及湿涂ORMOCER层沉积在ETFE、PVDF和ECTFE网上以形成单层和多层渗透屏障系统。综述了相关工艺参数对膜层结合力和渗透阻挡性能的影响。渗透阻挡涂层已被选择作为本研究的主要应用，因为它们对基底表面不规则性和由于低粘附力引起的机械损伤非常敏感，高应变或卷对卷处理问题，因此是衡量基材上涂层质量的良好指标。湿涂ORMOCER（R）层和反应溅射氧化锌锡（ZTO）层在LIFE和PVDF表面上都显示出令人惊讶的良好粘附性。ZTO和（通过粘合促进处理）氧化铝（Al 2 O3）层都具有在38 ℃/90% r.h.下低于5.10（-2）g/（m（2）d）的低水透过率（WVTR）的潜力。在这些基板上。湿涂ORMOCER（R）层和溅射ZTO层的组合证明了WVTR的进一步降低，在38 ℃/90% r.h.下产生1.10（-3）g/（m（2）d）的WVTR。这些值是通过调整工艺参数和层堆叠设计实现的，例如降低网张力和降低层厚度。本文所示的结果表明，涂覆的含氟聚合物网具有柔性薄膜太阳能电池功能化膜屋顶和幕墙的潜力;隔热和阳光控制功能;柔性薄膜电致发光和OLED照明面板以及电致变色器件。(C)© 2016 Elsevier B. V.版权所有。
Thin film deposition on fluoropolymer webs-both in vacuum and at atmospheric pressure-faces several critical challenges such as poor mechanical and thermo-mechanical properties-especially low dimensional stability and low elastic modulus, high and textured surface roughness and low adhesion of thin films.This paper discusses critical process parameters in roll-to-roll processing for both vacuum processes and wet coating processes with respect to the unique properties of fluoropolymer webs. Reactively sputtered oxide layers as well as wet coated ORMOCER layers are deposited on ETFE, PVDF and ECTFE webs to form single-and multi layer permeation barrier systems. The influence of relevant process parameters on the layer adhesion and permeation barrier performance is reviewed. Permeation barrier coatings have been selected as main application for this study, because they are very sensitive to substrate surface irregularities and mechanical damage due to low adhesion, high strain or roll-to-roll processing issues and therefore are a good measure for the quality of the coating on the substrate.Both the wet coated ORMOCER (R) layers and reactively sputtered zinc-tin oxide (ZTO) layers show surprisingly good adhesion on both LIFE and PVDF surfaces. Both ZTO and - with adhesion promotion treatment - also aluminum oxide (Al2O3) layers have the potential for low water transmission rates (WVTR) below 5.10(-2) g/(m(2) d) at 38 degrees C/90% r.h. on these substrates. Further reduction of the WVTR is demonstrated with a combination of wet coated ORMOCER (R) layers and sputtered ZTO layers yielding a WVTR of 1.10(-3) g/(m(2) d) at 38 C/90% r.h. These values were achieved using adapted process parameters and layer stack designs such as reduced web tension and lower layer thicknesses. The results shown in this paper demonstrate the potential of coated fluoropolymer webs for functionalization of membrane roofs and fa ades with flexible thin film solar cells; thermal insulation and solar control functionality; flexible thin film electroluminescent and OLED lighting panels as well as electrochromic devices. (C) 2016 Elsevier B.V. All rights reserved.