聚乙二醇丙烯酸酯表面改性聚醚砜酮微孔膜的结构和性能

Structure and performance of PEG-acrylate immobilized porous poly(phthalazine ether sulfone ketone) membrane

为了提高聚醚砜酮(PPESK)微孔膜的亲水性和抗污性,采用紫外(UV)辐照引发聚乙二醇丙烯酸酯(PEGA)在膜上发生接枝和交联,在膜表面形成稳定的亲水层。利用场发射扫描电镜(SEM)研究了固定PEGA后PPESK膜表面形貌的变化。表面改性后PPESK膜的水接触角的降低表明PEGA的固定有利于提高其亲水性,蛋白质静态吸附实验显示膜的抗蛋白质污染能力增强,渗透实验表明膜表面较低数量的PEGA亲水链有利于提高PPESK微孔膜的水通量,膜的溶质截留率增大,截留分子量(MWCO)减小。

PEG-acrylate（PEGA） was synthesized through the esterification of PEG and acrylate acid（AA）. To improve the hydrophilicity and anti-fouling properties of porous poly （phthalazine ether sulfone ketone） （PPESK） membranes, PEG-acrylate （PEGA） was immobilized on PPESK membrane via UV induced the grafting and cross-linking. The changes of surface morphologies of the modified PPESK membranes were investigated using SEM. The results of water contact angle（CA） and bovine serum albumin（BSA） adsorption experiments showed the introduction of PEGA chains contributed the PPESK membrane with better hydrophilicity and anti-fouling properties. The results of permeability measurements indicated that the solute rejection increased after PEGA immobilization, and a appropriate amount of PEGA on membrane was in advantage of water permeation through the PPESK membrane.