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小孔径聚酰胺卷式超滤膜制备及分离性能

作者：陈文杰¹，李忠华¹，陈董根²，许以农²，常娜³，刘鹏²，王海涛¹

单位： 1. 天津工业大学环境科学与工程学院 2. 浙江津膜环境科技有限公司 3. 天津工业大学化学工程与技术学院

关键词：卷式超滤膜；印染废水；聚酰胺；界面聚合； Na2SO4资源化

DOI号： 10.16159/j.cnki.issn1007-8924.2024.05.020

分类号： TQ051.893

出版年,卷(期):页码： 2024,44(5):164-171

摘要：

实现分子和离子的分离是当前膜技术领域的热点.超滤膜技术在有机物与无机盐分离领域具有广泛应用，但两者的选择性分离能力存在局限.开发能够分离小分子有机物与无机盐的超滤膜制备技术，是当前的重要需求.本研究提出了一种通过界面聚合法制备小孔径聚酰胺卷式超滤膜,可实现染料有机小分子与无机盐离子的高效分离.通过对“低浓度”下的聚酰胺薄膜合成条件进行优化,制备出了具有微小孔径的聚酰胺卷式超滤膜.该超滤膜的截留分子量为750，对刚果红(CR)的截留率为95 %，对硫酸钠(Na2SO4)的截留率低至10%，对CR/Na2SO4的分离度最高为9.4.所提出的界面聚合法制备小孔径聚酰胺卷式超滤膜工艺简单，易于工业推广.

The separation of molecules and ions is a hot topic in the field of membrane technology. Ultrafiltration membrane technology is widely used in the field of separation of organic matter and inorganic salt, but the selective separation ability of the two is limited. It is an important demand to develop ultrafiltration membrane preparation technology that can separate small molecular organic matter and inorganic salt. In this study, a small aperture polyamide roll-type ultrafiltration membrane prepared by interfacial polymerization was proposed to effectively achieve the efficient separation of dye organic small molecules and inorganic salt ions. The small aperture polyamide roll-type ultrafiltration membrane was prepared by optimizing the synthesis conditions of polyamide film at ‘low concentration’. By optimizing the synthesis conditions of polyamide membrane, a polyamide roll-type ultrafiltration membrane with small pore size was prepared. The molecular weight cut-off of the ultrafiltration membrane was 750, the rejection rate of Congo red (CR) was 95%, the rejection rate of sodium sulfate (Na2SO4) was as low as 10%, and the highest separation degree of CR/Na2SO4 was 9.4. The interfacial polymerization method proposed in this study to prepare small-aperture polyamide roll-type ultrafiltration membrane is simple and easy to promote in industry.

基金项目：

国家重点研发计划（2023YFC3206400）；山东省重点研发计划（2022CXGC020416）

作者简介：

陈文杰（1999-），男，山西晋城人，硕士生，研究方向为卷式超滤膜印染废水处理.*通讯作者，刘鹏，E-mail：liup@jinmo.com.cn；王海涛，E-mail：wanghaitao@tiangong.edu.cn

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