Liang Bang, Zhong Zhenxing, Jia Erna, Zhang Guangyu, Su Zhaohui
State Key Laboratory of Polymer Physics and Chemistry , Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022 , P. R. China.
University of Science and Technology of China , Hefei 230026 , P. R. China.
ACS Appl Mater Interfaces. 2019 Aug 21;11(33):30300-30307. doi: 10.1021/acsami.9b09610. Epub 2019 Aug 6.
Typical antifogging coatings based on hydrophilic polymers are soft and susceptible to mechanical damage. In this paper, an antifogging coating that is both scratch-resistant and self-healing is fabricated by copolymerizing sulfobetaine methacrylate and 2-hydroxyethyl methacrylate in the presence of sulfobetaine-modified silica nanoparticles in one pot. The coating is highly efficient in preventing fog formation at the surface and reducing ice adhesion, and is resistant to fouling by oil and protein, due to the strong hydration ability of the zwitterionic moieties. The composite coating is resistant to scratching and abrasion under normal use conditions to maintain its transparency due to increased hardness by the filled silica nanoparticles and is able to heal completely within several minutes severe scratches and cuts inflicted in harsh conditions, owing to the water-assisted reversibility of the electrostatic and hydrogen-bonding interactions holding together the polymer components and the silica nanoparticles. The multiple desirable properties demonstrated and the simple fabrication process of the coating offers great potential in many practical applications.
基于亲水性聚合物的典型防雾涂层质地柔软，易受机械损伤。本文通过在一锅法中，在磺基甜菜碱改性的二氧化硅纳米颗粒存在下，使甲基丙烯酸磺基甜菜碱和甲基丙烯酸2-羟乙酯共聚，制备了一种既具有抗划伤性又具有自愈性的防雾涂层。由于两性离子部分具有很强的水合能力，该涂层在防止表面形成雾气和降低冰附着力方面效率很高，并且具有抗油和蛋白质污染的能力。由于填充的二氧化硅纳米颗粒提高了硬度，复合涂层在正常使用条件下耐刮擦和磨损，以保持其透明度，并且由于将聚合物组分和二氧化硅纳米颗粒结合在一起的静电和氢键相互作用的水辅助可逆性，能够在几分钟内完全修复在恶劣条件下造成的严重划痕和切口。该涂层所展示的多种理想性能以及简单的制备工艺在许多实际应用中具有巨大潜力。
