Abstract

In this work, a multifunctional coating was developed by grafting a zwitterionic poly[2-(methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)-co-acrylic acid [poly(SBMA-co-AA)] polymer onto a glass slide, which possesses excellent antifog, antifrost, and self-cleaning properties. These properties are attributed to the strong hydration of the hydrophilic zwitterionic PSBMA segments. The durability of the coating can be improved because the carboxyl group (–COOH) of the PAA segment enables formation of a robust covalent bond with the amino group (–NH₂) on the substrate. The coating presents long-term stability, as proved by water contact angles, which were stable at 12 ± 1° after exposing the coating in ambient environment for 60 days or immersing in deionized water for 24 h. In addition, the underwater oil contact angle measurement demonstrated that an oil stain on the zwitterionic poly(SBMA-co-AA) polymer coating can be easily removed upon contact with water, showing self-cleaning performance. These properties verified that the zwitterionic multifunctional coating exploited in this research has many potential application prospects, including construction, automotive, aerospace, shipbuilding, biomedical, and other optical fields.

Graphic abstract

摘要

在这项工作中，通过将两性离子聚[2-（甲基丙烯酰氧基）乙基]二甲基-（3-磺丙基）-丙烯酸[聚（SBMA-co-AA）]聚合物接枝到载玻片上来开发多功能涂层，具有出色的防雾，防霜和自清洁性能。这些性质归因于亲水性两性离子PSBMA链段的强水合作用。可以提高涂料的耐久性，因为PAA链段的羧基（–COOH）能够与氨基（–NH ₂）。涂层具有长期稳定性，这可以通过水接触角来证明，在将涂层暴露于环境中60天或在去离子水中浸泡24小时后，其接触角稳定在12±1°。此外，水下油接触角测量表明，两性离子聚（SBMA-co-AA）聚合物涂层上的油渍与水接触后可以轻松清除，显示出自清洁性能。这些性能证明，本研究中使用的两性离子多功能涂料具有许多潜在的应用前景，包括建筑，汽车，航空航天，造船，生物医学和其他光学领域。

图形摘要