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Persistent Water Repellency of Syndiotactic Polymethylene with Perfluoroethyl Hexyloxycarbonyl Side Chains
Macromolecular Rapid Communications ( IF 4.6 ) Pub Date : 2021-08-06 , DOI: 10.1002/marc.202100311
Ayano Yoshitake 1 , Hiroyuki Kudo 1 , Hidetoshi Matsumoto 2 , Masatoshi Tokita 1
Affiliation  

Polyacrylates bearing long fluoroalkyl (Rf) side chains are known to have ultralow surface energies that are appropriate for functional coating and fabric finishing. However, these long Rf chains cause health concerns because of the risk of toxic and bioaccumulative perfluoroalcanoic acid emission via oxidative degradation. This work demonstrates that incorporating a short Rf chain of perfluoroethylene at the end of the side chains of syndiotactic poly(substituted methylene) (PM) produces hydrophobicity. A contact angle of 105° of PM remains constant for more than 50 s, whereas that of the polyacrylate (PA) with the same side chain rapidly decreases from 85° to 44° over the same period. Such persistent water repellency of the PM is ascribed to a liquid crystal structure comprised the main chains arranged in a 2D hexagonal lattice and side chains that extend perpendicularly from these main chains.

中文翻译:

具有全氟乙基己氧羰基侧链的间规聚亚甲基的持久拒水性

众所周知,带有长氟烷基 (Rf) 侧链的聚丙烯酸酯具有超低的表面能,适用于功能性涂层和织物整理。然而,这些长 Rf 链会引起健康问题,因为存在通过氧化降解释放有毒和生物累积性全氟烷酸的风险。这项工作表明,在间规聚(取代亚甲基)(PM)的侧链末端加入全氟乙烯的短 Rf 链会产生疏水性。PM 的 105° 接触角保持恒定超过 50 秒,而具有相同侧链的聚丙烯酸酯 (PA) 的接触角在同一时期从 85° 迅速下降到 44°。
更新日期:2021-09-07
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