Stretchable, Transparent, Permeation Barrier Layer for Flexible Optics
Stretchable, Transparent, Permeation Barrier Layer for Flexible Optics
复制标题
DOI：
10.1002/adom.202100334
复制
发表时间：
2021-04
影响因子：
9
通讯作者：
Yineng Zhao;Ni Huo;S. Ye;A. Boromand;A. Ouderkirk;W. Tenhaeff
中科院分区：
文献类型：
--
作者：
Yineng Zhao;Ni Huo;S. Ye;A. Boromand;A. Ouderkirk;W. Tenhaeff
在光学/光电子工业中迫切需要柔性的、顺应性的渗透阻挡层来保护可变形的、基于聚合物的光学元件，例如在变焦透镜中发现的那些。为了满足这些需求，通过引发化学气相沉积制备由聚（1H，1H，6 H，6 H-全氟己基二丙烯酸酯）（pPFHDA）组成的透明且可变形的聚合物渗透屏障涂层。pPFHDA是一种高度交联的含氟聚合物，可在环境温度下沉积在温度敏感的弹性膜上，具有高度的均匀性和保形性。这被认为是PFHDA单体的气相沉积的第一个证明。制备标称厚度范围为200至750 nm的涂层，并显示在70 °C下2个月内对高折射率光学流体（聚苯硫醚）是不可渗透的，这意味着即使在经受0.26%的双轴应变后，在室温下的寿命也超过4年。此外，由于其无定形性质，pPFHDA对300-1690 nm的波长是透明的，并且对300 °C的温度也是热稳定的。这些特性使得pPFHDA涂层成为需要透明和顺应性阻挡层的柔性光学/光电器件的特别引人注目的候选物。
Flexible, compliant permeation barrier layers are critically needed in the optics/optoelectronics industry to protect deformable, polymer‐based optical elements, such as those found in variable focus lenses. To address these needs, a transparent and deformable polymeric permeation barrier coating consisting of poly(1H,1H,6H,6H‐perfluorohexyl diacrylate) (pPFHDA) is prepared by initiated chemical vapor deposition. pPFHDA is a highly crosslinked fluoropolymer, which is deposited onto temperature‐sensitive elastomeric membranes at ambient temperature with high uniformity and conformality. This is believed to be the first demonstration of vapor deposition of the PFHDA monomer. Coatings with thicknesses nominally ranging from 200 to 750 nm are prepared and shown to be impermeable to high‐index optical fluid (polyphenyl thioether) over 2 months at 70 °C, which translates to more than 4 year lifespan at room temperature, even after being subjected to 0.26% biaxial strain. Moreover, due to its amorphous nature, the pPFHDA is transparent from wavelengths of 300–1690 nm and also thermally stable to temperatures of 300 °C. These properties should make pPFHDA coating a particularly compelling candidate for flexible optical/optoelectronic devices requiring transparent and compliant barrier layers.