以碳酸氢铵为致孔剂的木质素磺酸铵耐溶剂复合纳滤膜的构筑及性能调控研究  

Study on the construction and performance control of ammonium lignosulfonate nanofiltration membrane with ammonium bicarbonate as pore-forming agent

作　　者：石阳 吴思燕 汪翠萍 周阿洋 SHI Yang;WU Siyan;WANG Cuiping;ZHOU Ayang(College of Materials and Chemical Engineering,Chuzhou University,Chuzhou 239000,China)

机构地区：[1]滁州学院材料与化学工程学院

出　　处：《膜科学与技术》2019年第6期87-93,共7页Membrane Science and Technology

基　　金：滁州学院校级培育项目(2018Qd05)

摘　　要：以木磺铵为水相单体,与正己烷的均苯三甲酰氯溶液在乙二胺交联的聚醚酰亚胺膜表面发生界面聚合反应,制备了木磺铵耐溶剂复合纳滤膜.为提高膜通量,选择碳酸氢铵作为致孔剂.结果证明,通过调节碳酸氢铵的加入量可以提高木质素磺酸铵复合纳滤膜的通量.优化后的纳滤膜NF-2AL-1.5N分离10 mg/L考马斯亮蓝R250的二甲亚砜溶液,在48 h分离过程中,膜的渗透率保持在2.4 L/(m^2·h·MPa),截留率稳定在92%左右,说明所制备的复合纳滤膜在二甲基亚砜体系中具有稳定的耐溶剂性能.研究结果为提高耐溶剂纳滤膜分离性能提供了一条富有潜力的路径.In this study, a TFC polyamide membrane during interfacial polymerization between ammonium lignosulfonate and trimesoyl chloride on the ethylenediamine cross-linked poly(ether imide)(C-PEI)substrate was prepared, then, ammonium bicarbonate was adopted as a pore-forming agent to increase the permeance of membrane. The results showed that the separation performance of ammonium lignosulfonate composite nanofiltration membrane could be improved by adjusting the amount of ammonium bicarbonate. The optimized nanofiltration membrane was used to separate the DMSO solution of Brilliant Blue R250(BB). During the 48 hours separation, the permeability of NF-2 AL-1.5 N membrane was maintained 2.4 L/(m^2·h·MPa), and the retention rate was stable at 92% indicating that NF-2 AL-1.5 N film has excellent solvent resistance in DMSO system. The results provided a promising approach for preparing solvent-resistant nanofiltration membranes with high separation performance.

关 键 词：木质素磺酸铵 碳酸氢铵 均苯三甲酰氯 界面聚合 耐溶剂纳滤 

分 类 号：TQ316.43[化学工程—高聚物工业]