Patents by Inventor Zhanpeng Wu

Zhanpeng Wu 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).

  • Polyimide fiber with high strength and high modulus and its preparation method
    Patent number: 9428614
    Abstract: A high-strength high-modulus polyimide fiber and its preparation method pertain to the technical field of high-performance organic fiber. This fiber includes the polyimide (PI) fiber made from 3,3?,4,4?-biphenyl tetracarboxylic diandhydride (BPDA), p-phenylenediamine (pPDA) and 2-(4-aminophenyl)-1H-benzimidazol-5-amine (BIA), wherein the molar ratio between PPDA and BIA is 1:10˜3:1. During the synthesis, other diamine and diandhydride monomers may also be added. In the preparation process, the gradient temperature reaction method and one-step continuous preparation method are adopted, the synthesis and processing difficulty caused by the increase of the content of BIA is overcome, the problem of poor uniformity and stability of fiber is solved and PI fiber with high strength and high modulus is obtained. Its strength may reach 4.5 GPa and modulus may reach 201 GPa.
    Type: Grant
    Filed: December 24, 2012
    Date of Patent: August 30, 2016
    Assignee: BEIJING UNIVERSITY OF CHEMICAL TECHNOLOGY
    Inventors: Dezhen Wu, Hongqing Niu, Shengli Qi, Enlin Han, Xiaona Yan, Guofeng Tian, Zhanpeng Wu, Xiaodong Wang