Patents by Inventor Haifu GAO

Haifu GAO 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).

  • Publication number: 20240399313
    Abstract: Provided is a method for preparing a durable hydrophilic ultrafiltration membrane. In the disclosure, a functional hydrophilic molecule is synchronously synthesized during conventional dissolution of a polymer membrane material; and a resulting casting solution (a nascent membrane) is introduced into a coagulation bath, which initiates a cross-linking reaction between the functional hydrophilic molecules to form a hydrophilic cross-linked network. A hydrophilic cross-linked interpenetrating network is formed in situ during polymer phase separation to limit movement of polymer chains and formation and growth of micelles, thereby forming a relatively uniform polymer interpenetrating network structure to obtain the durable hydrophilic ultrafiltration membrane with a relatively uniform membrane pore structure.
    Type: Application
    Filed: May 20, 2024
    Publication date: December 5, 2024
    Inventors: Chunrui WU, Jingguo SHE, Haifu GAO, Ziping SONG, Xiaolong LV
  • Publication number: 20230035042
    Abstract: A method for preparing a durably hydrophilic and uniform-pore ultrafiltration membrane is disclosed herein. Chemical reactions between the functional groups and the active bonds of the molecular chains in the membrane materials are initiated perform the grafting of hydrophilic chains on the polymer chains under conventional dissolution conditions of the polymer membrane material (dissolution with synchronized hydrophilization), so as to realize durable hydrophilization of the membrane materials. The resulting hydrophilized polymer solution (a nascent-state membrane) is introduced into a coagulation bath to initiate a crosslinking reaction among the hydrophilic chains. The resulting crosslinking serves to synergistically regulate subsequent phase separation and membrane formation (phase separation under synergistic crosslinking).
    Type: Application
    Filed: July 21, 2022
    Publication date: February 2, 2023
    Inventors: Chunrui WU, Jingguo SHE, Haifu GAO, Xiaole CHEN, Ziping SONG, Xiaolong LV