磁性壳聚糖杂化纳滤膜的制备及脱盐性研究

摘要以聚丙烯腈为基膜材料、磁性壳聚糖(MCs)为掺杂剂,制备了纳滤膜。采用热重分析、红外光谱分别对膜的热稳定性及表面官能团进行了表征。考察了掺杂剂含量、进料浓度和跨膜压力等因素对纳滤膜的脱盐性影响。结果表明:随膜内MCs含量增大,膜的热稳定性提高,对Ca²⁺截留率先增后减。在进料浓度40 mg·L^-1和跨膜压力0.10 MPa操作条件下,由质量分数为2% MCs原料所制备的纳滤膜对Ca²⁺截留率达100%。

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	邓博
	郭诗琪
	吴永红
	黄鹤鸣
	张兵

关键词：纳滤膜工业废水 Ca²⁺ 磁性壳聚糖

Abstract： Nanofiltration membranes were prepared using polyacrylonitrile as membrane matrix and magnetic chitosan (MCs) as dopant. The thermal stability and surface functional groups of the membranes were correspondingly characterized by thermogravimetric analysis and infrared spectroscopy. The effects of some factors including dopant content, feed concentration and trans-membrane pressure on the desalination of the membranes were investigated. The results show that the thermal stability of the nanofiltration membrane increases, and the Ca²⁺ rejection first increases then decreases, with the increasing of MCs content in membranes. The Ca²⁺ rejection can reach to 100% for the as-prepared nanofiltration membranes with MCs content of 2% in raw materials under the conditions of feed concentration of 40 mg·L^-1 and transmembrane pressure of 0.10 MPa.

Keywords： nanofiltration membrane industrial wastewater Ca²⁺ magnetic chitosan

Received 2023-09-03;

Fund:辽宁省自然科学基金资助项目(2021-MS-238);辽宁省教育厅科研项目(LJGD2020002);沈阳市科技创新人才项目(RC200325)。

Corresponding Authors: 吴永红,副教授,wuyh@sut.edu.cn Email: wuyh@sut.edu.cn

About author: 邓博(1998—),男,硕士研究生,现从事纳滤分离膜材料制备方面的研究。

引用本文:

邓博, 郭诗琪, 吴永红, 黄鹤鸣, 张兵.磁性壳聚糖杂化纳滤膜的制备及脱盐性研究[J]. 化学工业与工程, 2025,42(1): 54-58

DENG Bo, GUO Shiqi, WU Yonghong, HUANG Heming, ZHANG Bing.Investigation of the preparation and desalination property of magnetic chitosan hybrid nanofiltration membranes[J]. Chemcial Industry and Engineering, 2025,42(1): 54-58

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