Patents by Inventor Changqing Fang

Changqing Fang 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).

  • Carbon nanotubes and preparation method thereof by using PET
    Patent number: 10947118
    Abstract: The present invention relates to carbon nanotubes and a preparation method thereof by using PET. The carbon nanotubes of the present invention are prepared by processes of alcoholysis of PET materials, processes of washing, crushing and calcining unreacted intermediates and so on. By the preparation method of the present invention, multi-walled carbon nanotubes prepared by using waste PET have a good conductivity, and are a structure of top-down array with low aspect ratio. The method of the present invention is not only easy to implement, but also does not need a catalyst, and turns the waste PET into treasure, which solves the problem of environmental pollution caused by the increasingly serious waste PET. FIG. 9.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: March 16, 2021
    Assignee: Xi'an University of Technology
    Inventors: Changqing Fang, Xing Zhou, Rong Yang, Shaofei Pan, Wanqing Lei, Yan Li
  • Carbon Nanotubes and Preparation Method thereof by Using PET
    Publication number: 20180319665
    Abstract: The present invention relates to carbon nanotubes and a preparation method thereof by using PET. The carbon nanotubes of the present invention are prepared by processes of alcoholysis of PET materials, processes of washing, crushing and calcining unreacted intermediates and so on. By the preparation method of the present invention, multi-walled carbon nanotubes prepared by using waste PET have a good conductivity, and are a structure of top-down array with low aspect ratio. The method of the present invention is not only easy to implement, but also does not need a catalyst, and turns the waste PET into treasure, which solves the problem of environmental pollution caused by the increasingly serious waste PET. FIG. 9.
    Type: Application
    Filed: April 19, 2018
    Publication date: November 8, 2018
    Inventors: Changqing Fang, Xing Zhou, Rong Yang, Shaofei Pan, Wanqing Lei, Yan Li