MOE Key Laboratory of Macromolecular Synthesis and Functionalization, and Key Laboratory of Adsorption and Separation Materials and Technologies of Zhejiang Province, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China.
Key Laboratory of Green Printing, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China.
Langmuir. 2019 Feb 5;35(5):1895-1901. doi: 10.1021/acs.langmuir.8b02320. Epub 2018 Sep 6.
Zwitterionic polymers are continually suggested as promising alternatives to tune the surface/interface properties of materials in many fields because of their unique molecular structures. Tremendous efforts have been devoted to immobilizing zwitterionic polymers (polyzwitterions, PZIs) on the material surfaces. However, these efforts usually suffer from cumbersome and time-consuming procedures. Herein we report a one-step strategy to facilely achieve the bioinspired polydopamine/polyzwitterion (PDA/PZI) coatings on various substrates. It requires only 30 min to form PDA/PZI coatings by mixing oxidant, dopamine, and zwitterionic monomers, including carboxybetaine methacrylate (CBMA), sulfobetaine methacrylate (SBMA), and 2-methacryloxyethyl phosphorylcholine (MPC). These bioinspired coatings display multifunctional properties such as underwater antioil-adhesion and antifreezing thanks to their high hydrophilicity and underwater superoleophobicity. The coatings even show the antiadhesion property for crude oil with high viscosity. Therefore, the PDA/PZI-coated meshes are efficient for separating both light oil and crude oil from oil/water mixtures. All these results demonstrate that the one-step strategy is a facile approach to design and exploit the bioinspired PDA/PZI coatings for diverse applications.
两性离子聚合物由于其独特的分子结构，被不断提出作为调节许多领域材料表面/界面性质的有前途的替代品。人们投入了巨大的努力将两性离子聚合物（聚两性离子，PZIs）固定在材料表面上。然而，这些努力通常受到繁琐和耗时的程序的限制。在这里，我们报告了一种一步策略，可以轻松地在各种基材上实现仿生聚多巴胺/聚两性离子（PDA/PZI）涂层。只需将氧化剂、多巴胺和两性离子单体（包括甲基丙烯酰氧乙基磷酸胆碱（MPC）、甲基丙烯酰磺基甜菜碱（SBMA）和甲基丙烯酰基甜菜碱（CBMA））混合 30 分钟即可形成 PDA/PZI 涂层。这些仿生涂层由于其高亲水性和水下超疏油性，显示出水下抗油附着和防冻等多功能特性。即使对于高粘度的原油，涂层也表现出抗粘性。因此，PDA/PZI 涂层的滤网对于从油水混合物中有效分离轻质油和原油非常有效。所有这些结果表明，一步策略是一种简单的方法，可以设计和利用仿生 PDA/PZI 涂层来满足各种应用需求。
