摘要
采用原子转移自由基聚合法(ATRP)将二甲基丙烯酸甘油酯(GDMA)接枝到聚偏氟乙烯(PVDF)主链上合成两亲性共聚物改性剂PVDF-g-GDMA,采用非溶剂致相转化法(NIPS)将改性剂PVDF-g-GDMA与PVDF粉共混制备PVDF-g-GDMA/PVDF复合膜。通过傅里叶红外光谱(FT-IR)和核磁共振氢谱(1 H NMR)对聚合过程进行表征,结果发现GDMA被成功地接枝到PVDF主链上。采用X光电子能谱(XPS)、扫描电子显微镜(SEM)、接触角测定仪(CA)等对PVDF-g-GDMA/PVDF复合膜的表面化学组成、表面形貌、亲水性进行了表征研究;采用循环错流过滤评价装置,对复合膜的渗透通量和牛血清蛋白(BSA)的抗污染性能进行研究,实验结果表明复合膜的渗透通量比PVDF膜的渗透通量提高约2.5倍,而对蛋白质截留性能的影响变化不大。总之,制备的复合膜在渗透通量、亲水性和抗污染能力方面都表现出优异的性能。
The monomer glycerol dimethacrylate（GDMA）was grafted on PVDF backbone via atom transfer radical polymerization（ATRP）to synthesize an amphiphilic copolymer PVDF-g-GDMA.The resulting copolymer as a hydrophilic modifier was incorporated in PVDF matrix to fabricate PVDF-g-GDMA/PVDF composite membrane through non-solvent induce phase separation method（NIPS）.The polymerization process was characterized by Fourier transform infrared spectroscopy（FT-IR）and nuclear magnetic resonance hydrogen spectroscopy（1 H NMR）.The results showed that GDMA was successfully grafted onto the PVDF backbone.The chemical composition changes of composite membrane surface were confirmed through X-ray photoelectron spectroscopy（XPS）.The membrane morphologies were measured by scanning electron microscopy（SEM）.Contact angle measurement was employed to evaluate the hydrophilicity of the membranes.The permeate flux and protein fouling resistance of PVDF-g-GDMA/PVDF composite membranes were assessed using cross-flow permeation test with bovine serum albumin（BSA）as a model protein.It is found that the permeate flux of the composite membrane（M4）is about 2.5 times than that of the PVDF membrane,while BSA rejection ratio changes slightly.In summary,the obtained composite membranes exhibit improved water permeability,enhanced hydrophilicity and excellent anti-fouling properties.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2018年第1期1083-1089,1096,共8页
Journal of Functional Materials
