Patents by Inventor Huajun DUAN

Huajun DUAN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Preparation method of zeolite/polyimide composite membrane and applications thereof
    Patent number: 11926707
    Abstract: A preparation method of a zeolite/polyimide composite membrane includes: synthesizing a zeolite-doped polyamic acid precursor casting solution by condensation polymerization synthesis; coating a substrate with the obtained casting solution, and obtaining a zeolite/polyamic acid composite porous membrane by non-solvent induced phase separation; and obtaining the zeolite/polyimide composite membrane by performing thermal imidization on the zeolite/polyamic acid composite porous membrane through gradient heating.
    Type: Grant
    Filed: November 26, 2020
    Date of Patent: March 12, 2024
    Assignee: WUHAN UNIVERSITY OF TECHNOLOGY
    Inventors: Xiang Wang, Danxia Chen, Yanling Li, Jun Wang, Xiaoli Yang, Huajun Duan
  • PREPARATION METHOD OF ZEOLITE/POLYIMIDE COMPOSITE MEMBRANE AND APPLICATIONS THEREOF
    Publication number: 20210155756
    Abstract: A preparation method of a zeolite/polyimide composite membrane includes: synthesizing a zeolite-doped polyamic acid precursor casting solution by condensation polymerization synthesis; coating a substrate with the obtained casting solution, and obtaining a zeolite/polyamic acid composite porous membrane by non-solvent induced phase separation; and obtaining the zeolite/polyimide composite membrane by performing thermal imidization on the zeolite/polyamic acid composite porous membrane through gradient heating.
    Type: Application
    Filed: November 26, 2020
    Publication date: May 27, 2021
    Inventors: Xiang WANG, Danxia CHEN, Yanling LI, Jun WANG, Xiaoli YANG, Huajun DUAN