Wang Haiye, Zhao Xinzhen, He Chunju
State Key Lab for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China.
State Key Lab for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China.
Int J Biol Macromol. 2016 Jun;87:443-8. doi: 10.1016/j.ijbiomac.2016.02.074. Epub 2016 Mar 2.
A novel zwitterionic surface of PVDF membrane with significantly improved antifouling properties was prepared though pressure-assisted layer by layer self-assembly method based on the electrostatic interactions of chitosan (CS), sodium alginate (SA) and polyfunctional lysine. For the modified C-S-C-S-L membrane, the contact angle decreased to 35°, the bovine serum albumin (BSA) adsorption mass of static fouling on the membrane surface decreased to 10μg/cm(2), and the secondary water flux recovery rate (FRR) of dynamic fouling of BSA and humic acid (HA) pollutants increased to 98% and 99%, respectively, exhibiting excellent antifouling performance. The results demonstrated that using charged bio-macromolecules and amino acids to build zwitterionic surface was effective and convenient to change the interface properties of the separation membrane through the pressure-assisted self-assembly modification method, and provided a new way for the industrial scale hydrophilic modification of hydrophobic porous membrane materials.
通过基于壳聚糖（CS）、海藻酸钠（SA）和多功能赖氨酸的静电相互作用的压力辅助层层自组装方法，制备了一种具有显著改善的抗污染性能的新型聚偏氟乙烯（PVDF）膜两性离子表面。对于改性的C-S-C-S-L膜，接触角降至35°，膜表面静态污染的牛血清白蛋白（BSA）吸附量降至10μg/cm²，BSA和腐殖酸（HA）污染物动态污染的二次水通量回收率（FRR）分别提高到98%和99%，表现出优异的抗污染性能。结果表明，利用带电生物大分子和氨基酸构建两性离子表面，通过压力辅助自组装改性方法改变分离膜的界面性质是有效且方便的，为疏水多孔膜材料的工业规模亲水化改性提供了一条新途径。
