公开(公告)号：US11850555B2

公开(公告)日：2023-12-26

申请号：US17218181

申请日：2021-03-31

Applicant: NANJING TECH UNIVERSITY

Inventor： Shipeng Sun ,  Zhenyuan Wang ,  Zhengjun Fu ,  Mengmeng Tang ,  Dandan Shao ,  Weihong Xing

IPC: B01D67/00 ,  B01D69/06 ,  B01D71/56 ,  B01D71/64 ,  B01D71/68 ,  B01D61/02 ,  B01D61/14 ,  B01D69/08 ,  B01D69/12 ,  B01D71/78 ,  C02F1/44 ,  D01D5/24 ,  D01D5/34 ,  D01F1/08 ,  B01D71/06 ,  B01D53/22 ,  B01D61/00 ,  B01D61/36 ,  D01D5/06

CPC classification number: B01D67/0016 ,  B01D61/025 ,  B01D61/027 ,  B01D61/147 ,  B01D67/0002 ,  B01D67/0013 ,  B01D69/06 ,  B01D69/08 ,  B01D69/088 ,  B01D69/12 ,  B01D69/125 ,  B01D71/06 ,  B01D71/56 ,  B01D71/68 ,  B01D71/78 ,  C02F1/448 ,  D01D5/24 ,  D01D5/34 ,  D01F1/08 ,  B01D53/228 ,  B01D61/002 ,  B01D61/02 ,  B01D61/14 ,  B01D61/145 ,  B01D61/362 ,  B01D2323/12 ,  B01D2323/38 ,  C02F1/441 ,  C02F1/442 ,  C02F1/444 ,  C02F1/445 ,  D01D5/06

Abstract: A dual-layer membrane and a method for preparing thereof. By adding a modifying monomer containing an active group and a characteristic group to a dope solution or spinning solution during the preparation of the dual-layer membrane, the grafting reaction occurs between the active group of the monomer and the polymer in the dope solution or spinning solution, and the intermolecular interaction with other polymers is enhanced by the characteristic group of the monomer, to improve the miscibility between the polymers. The method is suitable for preparing both a dual-layer flat sheet membrane and a dual-layer hollow fiber membrane, and can realize the preparation of a dual-layer membrane with an interpenetrated structure at the interface under mild preparation conditions.