Liang Bang, Zhang Guangyu, Zhong Zhenxing, Huang Yan, 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 , Anhui 230026 , P. R. China.
Langmuir. 2019 Feb 5;35(5):1294-1301. doi: 10.1021/acs.langmuir.8b01009. Epub 2018 Jun 6.
In this work, an anti-icing coating based on superhydrophilic polyzwitterion brushes is reported. Poly(sulfobetaine methacrylate) (PSBMA) brushes were synthesized by surface-initiated atom-transferred radical polymerization to create superhydrophilic films on silicon wafers. The thickness of the PSBMA brushes film increased linearly with the polymerization time, and the film remained superhydrophilic in a nonassociated state when the thickness was less than ∼100 nm. DSC and FTIR analyses revealed that PSBMA contains more nonfreezable bound water than typical polyelectrolytes such as poly(sodium styrenesulfonate) and poly(2-(methacryloyloxy)ethyltrimethylammonium chloride), leading to lower ice adhesion strength than the latter two. At -20 °C, the PSBMA brushes coating demonstrated low ice adhesion strength of 60 kPa, showing a significant reduction in ice adhesion by up to ∼75% compared to uncoated silicon wafer. The optimum PSBMA layer thickness for low ice adhesion was ∼100 nm. These findings suggest that polyzwitterions are excellent candidates for anti-icing coating application.
在这项工作中，报道了一种基于超亲水聚两性离子刷的防冰涂层。通过表面引发的原子转移自由基聚合合成了聚（甲基丙烯酸磺酸甜菜碱）（PSBMA）刷，以在硅片上形成超亲水膜。PSBMA刷膜的厚度随聚合时间线性增加，当厚度小于约100nm时，膜在非缔合状态下保持超亲水。差示扫描量热法（DSC）和傅里叶变换红外光谱（FTIR）分析表明，PSBMA比典型的聚电解质如聚（苯乙烯磺酸钠）和聚（2-（甲基丙烯酰氧基）乙基三甲基氯化铵）含有更多的不可冻结结合水，导致其冰粘附强度低于后两者。在-20°C时，PSBMA刷涂层表现出60kPa的低冰粘附强度，与未涂覆硅片相比，冰粘附力显著降低高达约75%。低冰粘附的最佳PSBMA层厚度约为100nm。这些发现表明聚两性离子是防冰涂层应用的极佳候选材料。
