Preparation method of polyolefin-based composite film

• Main Authors: LI JUNJUN, QIAN BINGXIANG, JI GENLIANG, SHEN LIQIANG
• Format: Patent
• Language: Chinese; English
• Published: 16.06.2023
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The invention relates to a preparation method of a polyolefin-based composite membrane, in particular to a preparation method of a polyolefin composite membrane for nanofiltration separation of an organic solvent system. The preparation method comprises the following steps: carrying out chemical cross-linking hydrophilic treatment on a polyolefin-based membrane, introducing an amino group into a hydrophilic layer, then carrying out interfacial polymerization reaction, and improving the bonding strength of the polyolefin-based membrane and an interfacial polymerization layer through the participation of a hydrophilic cross-linking layer and the amino group in the interfacial polymerization process. 本发明涉及一种聚烯烃基复合膜制备方法，特别是有机溶剂体系纳滤分离用途的聚烯烃膜复合膜的制备方法。对聚烯烃基膜进行化学交联亲水，在亲水层引入胺基基团，然后进行界面聚合反应，通过亲水交联层及胺基基团参与界面聚合过程提高聚烯烃基膜与界面聚合层的结合强度。