Superhydrophilic Polymer Brushes with High Durability and Anti-fogging Activity
Superhydrophilic Polymer Brushes with High Durability and Anti-fogging Activity
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DOI：
10.1021/acsapm.1c01090
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发表时间：
2021-09-21
影响因子：
5
通讯作者：
Pester, Christian W.
中科院分区：
文献类型：
--
作者：
Fromel, Michele;Sweeder, Devon M.;Pester, Christian W.
亲水性表面涂层已成为解决结雾、结霜和生物污垢等问题的可能解决方案，已进入商业应用。然而，存在着一个内在的矛盾：超亲水涂料可以防止这些不想要的现象，但它们也很容易被水溶解。为了解决这一长寿问题，本工作引入了一种在环境条件下进行的全水表面引发(SI)聚合，以便于形成持久的超亲水聚合物涂层。本文开发的水相SI光诱导电子转移可逆加成-断裂链转移聚合(SI-PET-RAFT)方法使用水作为唯一的溶剂，可以在环境空气中进行。这绕过了SI自由基聚合的传统缺点，这些缺点与亲水性单体在有机溶剂中的溶解性和耐氧性有关。此外，在淡黄色光下聚合可消除传统热处理或紫外光处理时可能发生的底物降解。这项研究中设计的阳离子、阴离子和两性离子聚合物薄膜显示出作为功能材料的前景，具有增强的耐用性，证明可以有效地应对表面雾化的挑战。所描述的方法是用户友好的、成本和时间有效的、可伸缩的，并可产生在光学质量和耐用性方面优于商业解决方案的高效防雾涂层。
Hydrophilic surface coatings have made it into commercial application as possible solutions for problems such as fogging, frosting, and biofouling. However, there is an inherent contradiction: superhydrophilic coatings can prevent these unwanted phenomena, but they are also readily dissolved by water. To address this longevity concern, the present work introduces a fully aqueous surface-initiated (SI) polymerization under ambient conditions for the facile formation of durable superhydrophilic polymer coatings. The aqueous SI photoinduced electron transfer reversible addition-fragmentation chain transfer polymerization (SI-PET-RAFT) approach developed herein uses water as a sole solvent and can be performed in an ambient air atmosphere. This circumvents traditional shortcomings in SI radical polymerization related to limited hydrophilic monomer solubility in organic solvents and oxygen tolerance. In addition, polymerization under mild yellow light eliminates possible substrate degradation that can occur with conventional thermal or UV-light treatment. The cationic, anionic, and zwitterionic polymer films engineered in this study show promise as functional materials with enhanced durability, demonstrated to effectively combat the challenge of surface fogging. The described approach is user-friendly, cost- and time-efficient, and scalable and produces efficient anti-fogging coatings that outperform commercial solutions in both optical quality and durability.