公开(公告)号：US20210308627A1

公开(公告)日：2021-10-07

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 ,  B01D61/02 ,  B01D69/06 ,  B01D69/08 ,  B01D69/12 ,  B01D71/64 ,  B01D71/68 ,  B01D71/78

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.

公开(公告)号：US20250153113A1

公开(公告)日：2025-05-15

申请号：US19026585

申请日：2025-01-17

Applicant: NANJING TECH UNIVERSITY

Inventor： Zhaoxiang ZHONG ,  Shiying NI ,  Dong ZOU ,  Yanmin GONG ,  Weihong XING

IPC: B01D67/00 ,  B01D39/20 ,  B01D71/02 ,  C04B35/624 ,  C04B35/626 ,  C04B35/634 ,  C04B35/64 ,  C04B35/82

Abstract: A method for preparing a ceramic fiber filter tube with high air permeability, including: using mullite short fibers as aggregates, adding glass fibers and silica sol as sintering aids, obtaining a ceramic fiber filter tube green body by using a filterer-pressing forming process, and obtaining the ceramic fiber filter tube with high air permeability by freeze-drying and heat treatment in turn. The combination of two sintering aids with different properties can effectively improve the performance of ceramic fiber filter tube prepared by a wet forming technology. At the same time, the freeze-drying treatment can block the migration path of nanoparticles in the silica sol to the surface of the ceramic fiber filter tube due to the capillary force, so that the properties of the prepared ceramic fiber filter tube are more uniform, providing a reference for the preparation of a ceramic fiber membrane with high flux.

公开(公告)号：US20190211175A1

公开(公告)日：2019-07-11

申请号：US16099182

申请日：2017-06-30

Applicant: NANJING TECH UNIVERSITY

Inventor： Yong WANG ,  Weihong XING ,  Nanping XU

IPC: C08J9/28 ,  C08L81/06

CPC classification number: C08J9/28 ,  C08J9/00 ,  C08J2201/0502 ,  C08J2201/0504 ,  C08J2205/042 ,  C08J2381/06 ,  C08J2387/00 ,  C08J2471/02 ,  C08L81/06 ,  C08L2203/14

Abstract: The present invention relates to a method for preparing nanoporous polysulfone-based polymers, including: a copolymer of a polysulfone polymer and a polar polymer is immersed into a compound swelling agent, and maintained for at least 1 minute above room temperature; the compound swelling agent is a “solvent pair” composed of the mixture of solvent A and solvent B; the solvent A has high affinity with the polysulfone polymer; and the solvent B has high affinity with the polar polymer; the treated copolymer is taken out from the compound swelling agent and then dried to remove the solvent to obtain the nanoporous polysulfone-based polymers.