Abstract:

Fe³⁺ coordination was used to promote the rapid co-deposition of tannic acid/chitosan colloidal particles on the surface of the modified PAN ultrafiltration membrane. And then on its surface a composite nanofiltration membrane was prepared by interfacial polymerization with trimesoyl chloride(TMC). 2, 4-diaminobenzenesulfonic acid (2, 4-DABSA) was added to the water phase to study the filtration and anti-fouling performance of the composite membrane after introducing sulfonic acid groups. The results showed that sulfonated TA/CS composite membrane had a retention rate of 96.21% and 90.35% for Na₂SO₄ and MgSO₄, and it had excellent flux recovery rate after filtering under 0.1 g/L humic acid and bovine serum albumin for 24 h.

Key words: composite nanofiltration membrane, tannic acid, chitosan, sulfonic acid groups

摘要：

利用Fe³⁺的配位作用使单宁酸（TA）/壳聚糖（CS）胶体粒子在改性聚丙烯腈（PAN）超滤膜的表层快速共沉积，然后在其表面上与均苯三甲酰氯（TMC）进行界面聚合，制备了复合纳滤膜。在水相中添加2，4-二氨基苯磺酸（2，4-DABSA），考察引入磺酸基团后复合膜的过滤及抗污染性能。结果表明，磺化TA/CS复合膜对Na₂SO₄和MgSO₄的截留率分别达到96.21%和90.35%，并且在0.1 g/L腐殖酸、牛血清白蛋白环境下过滤24 h后均具有优异的通量恢复率。

关键词: 复合纳滤膜, 单宁酸, 壳聚糖, 磺酸基团

CLC Number: 

• TQ051.893