共聚物
膜
块(置换群论)
材料科学
高分子化学
高分子科学
化学
复合材料
数学
聚合物
组合数学
生物化学
作者
Chong Shen,Bin Peng,Qin Meng
标识
DOI:10.5004/dwt.2021.28012
摘要
Sulfobetaine methacrylate (SBMA) is a well-known zwitterionic molecule that can improve the hydrophilic property of hydrophobic membranes such as polysulfone (PSU).However, SBMA is too hydrophilic to dissolve in organic solvents.Hence, it is difficult to modify the polymer membranes via blending with their casting solution.This paper aims to synthesize an amphiphilic block polymers of polystyrene-block-sulfobetaine methacrylate (PS-b-SBMA) which can be well dissolved in organic solvents for membrane casting.The two PS-b-SBMA copolymers with SBMA content >28% were applied as the additives to cast the PSU ultrafiltration membrane.The PS-b-SBMA copolymer modified membranes showed lower contact angles and 3-folds higher water flux recovery after BSA treatment than the parent PSU membrane.Moreover, SEM images showed that the BSA contaminant on the modified membrane surfaces was much less than that on PSU membrane.Thus, such modified membranes can be applied to prevent protein fouling in the process of ultrafiltration.
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