公开(公告)号：US20250091015A1

公开(公告)日：2025-03-20

申请号：US18570497

申请日：2023-05-29

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Xuehua RUAN ,  Gaohong HE ,  Weixiang FAN ,  Jiaming WANG ,  Wenji ZHENG ,  Xiaobin JIANG ,  Xiaoming YAN ,  Wu XIAO ,  Qinzheng HE

IPC: B01D67/00 ,  B01D53/22 ,  B01D69/02 ,  B01D71/52

Abstract: A large-scale fabrication technique for PIM-1 asymmetric membranes doped with low-molecular-weight polyethylene glycol for gas separation. Based on the membrane fabrication technique of dry/wet phase inversion, firstly, the coagulation process of casting solution is regulated by low-molecular-weight polyethylene glycol to thin the dense functional layer, to improve the hydrophilicity of the membrane structure, and to form mass transfer channels for the diffusion of polyethylene glycol into the dense functional layer. Then, directional migration and enrichment of polyethylene glycol are realized through capillary action induced by directional water evaporation for large-scale fabrication of PIM-1 asymmetric membranes doped with low-molecular-weight polyethylene glycol in the dense functional layer for gas separation, and thereafter high permeation ability and high selectivity are achieved simultaneously.