膜科学与技术

改性CNC对聚氯乙烯超滤膜性能影响研究

作者：汤超，刘四华，张仁伟，厍景国，武春瑞，吕晓龙

单位：省部共建分离膜与膜过程国家重点实验室天津工业大学环境科学与工程学院，天津 300387

关键词：聚氯乙烯；超滤膜；纤维素纳米晶；乙酰化；非溶剂致相分离

出版年,卷(期):页码： 2020,40(5):9-15

摘要：

本文利用乙酰化反应制备了乙酰化纤维素纳米晶（ACNC），研究了ACNC的添加对PVC膜结构和性能的影响。研究结果表明，ACNC的引入，可有效调节PVC膜的相分离成形速率、膜材料亲水性，调控膜微结构。适宜的ACNC添加，可使PVC膜的纯水接触角降低 18.3%，纯水通量提升 77.6%，拉伸强度提升68.4%，通量恢复率提升59.5%，而膜对BSA的截留率保持稳定。

Acetylated cellulose nanocrystals (ACNC) were prepared by acylation reaction, and the effects of the addition of ACNC on the structure and properties of PVC membrane were studied. The results show that the introduction of ACNC can effectively adjust the phase separation forming rate of PVC membranes, the hydrophilicity of membrane materials, and regulate the microstructure of membranes. Appropriate ACNC addition can reduce the pure water contact angle of the PVC membrane by 18.3%, increase the pure water flux by 77.6%, increase the tensile strength by 68.4%, and increase the flux recovery rate by 59.5%, while the BSA rejection rate of the membrane remains stable.

汤超（1995-），男，山东枣庄人，硕士，从事聚合物分离膜制备

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