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Abstract：
This work demonstrates a cross-linkable zwitterionic polymer, the corresponding zwitterionic thermosetting resin, and their application for antifouling surface coating. The tertiary amine-containing benzoxazine group is utilized as a precursor to react with 1,3-propane sultone to introduce sulfobetaine moiety to benzoxazine group. The reaction route provides an effective approach for preparation of sulfobetaine-functionalized benzoxazines and the corresponding sulfobetaine-functionalized thermosetting resins of benzoxazines. The sulfobetaine-functionalized polybenzoxazine has been utilized as a coating material for ceramic porous membranes to impart protein-repelling characteristic to the membrane surface. In a filtration test on a Bovine serum albumin (BSA) aqueous solution, the sulfobetaine resin modified membrane shows a 96.2% of rejection rate and a 1680 ± 9 Lm2-h-1 of permeation flux at the first cycle test. In cycled measurements with membrane washing, the membrane shows a total flux decline ratio (Rt) and a reversible flux decline ratio (Rr) of about 46.9% and 43.1%, respectively. A high ratio of reversible fouling (Rr/Rt) of 91.9% is found, which supports the statement that the sulfobetaine-functionalized polybenzoxazine is an effective material to impart antifouling characteristic to porous materials for bioseparation and filtration.
摘要：
这项工作证明了一种可交联的两性离子聚合物，相应的两性离子热固性树脂，及其在表面防污涂料中的应用。含叔胺的苯并恶嗪基团用作与1,3-丙烷磺内酯反应以将磺基甜菜碱部分引入苯并恶嗪基团的前体。该反应路线为制备磺基甜菜碱官能化苯并恶嗪和相应的磺基甜菜碱官能化苯并恶嗪热固性树脂提供了有效途径。磺基甜菜碱官能化的聚苯并恶嗪已用作陶瓷多孔膜的涂层材料，以赋予膜表面排斥蛋白质的特性。在牛血清白蛋白（BSA）水溶液的过滤测试中，磺基甜菜碱树脂改性膜在第一循环测试中显示出96.2%的截留率和1680±9Lm2·h-1的渗透通量。在膜清洗循环测量中，膜的总通量下降率（Rt）和可逆通量下降率（Rr）约为46.9％和43.1％，分别。发现了91.9%的高可逆结垢比(Rr/Rt)，这支持了以下说法：磺基甜菜碱官能化的聚苯并恶嗪是一种有效的材料，可赋予多孔材料用于生物分离和过滤的防污特性。
