Patents by Inventor Helan Xu

Helan Xu 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).

  • Patent number: 11299584
    Abstract: Disclosed is a preparation method for polylactic acid grafted chitosan nanowhiskers, and belongs to the technical field of materials. The preparation method of the disclosure is that after lactide, a catalyst and chitosan are uniformly mixed, polymerization grafting is performed to prepare PLA-g-CS, and then the PLA-g-CS is dispersed into an alkali liquor to obtain nanowhiskers by a repeated freezing/unfreezing method, with no solvent used in a polymerization grafting process. The method has advantages that the nanowhiskers can be prepared from the PLA-g-CS without a good solvent, and the whole reaction is efficient, clean, and environmentally friendly.
    Type: Grant
    Filed: September 22, 2021
    Date of Patent: April 12, 2022
    Assignee: Jiangnan University
    Inventors: Helan Xu, Guiqing Luo, Bomou Ma, Xiuliang Hou
  • Publication number: 20220002482
    Abstract: Disclosed is a preparation method for polylactic acid grafted chitosan nanowhiskers, and belongs to the technical field of materials. The preparation method of the disclosure is that after lactide, a catalyst and chitosan are uniformly mixed, polymerization grafting is performed to prepare PLA-g-CS, and then the PLA-g-CS is dispersed into an alkali liquor to obtain nanowhiskers by a repeated freezing/unfreezing method, with no solvent used in a polymerization grafting process. The method has advantages that the nanowhiskers can be prepared from the PLA-g-CS without a good solvent, and the whole reaction is efficient, clean, and environmentally friendly.
    Type: Application
    Filed: September 22, 2021
    Publication date: January 6, 2022
    Inventors: Helan XU, Guiqing LUO, Bomou MA, Xiuliang HOU
  • Patent number: 10828246
    Abstract: This disclosure relates to hair styling compositions and processes, and more particularly to compositions for disentangling or crosslinking hair that are useful in hair styling processes.
    Type: Grant
    Filed: October 3, 2016
    Date of Patent: November 10, 2020
    Assignee: NUtech Ventures
    Inventors: Yiqi Yang, Helan Xu, Kaili Song
  • Publication number: 20170173917
    Abstract: Compression molded composites comprising at least two compressed layers of unshredded carpet and method of making compression molded composites from unshredded carpets.
    Type: Application
    Filed: December 21, 2016
    Publication date: June 22, 2017
    Inventors: Yiqi Yang, Yi Zhao, Gangwei Pan, Helan Xu
  • Publication number: 20170095409
    Abstract: This disclosure relates to hair styling compositions and processes, and more particularly to compositions for disentangling or crosslinking hair that are useful in hair styling processes.
    Type: Application
    Filed: October 3, 2016
    Publication date: April 6, 2017
    Inventors: Yiqi Yang, Helan Xu, Kaili Song
  • Publication number: 20140011416
    Abstract: A randomly-oriented 3-D fibrous structure and a method for making the same. The method involves electrospinning a spinning dope with an electrospinning apparatus, wherein the spinning dope comprises: a solvent; a polymer dissolved in the solvent, wherein the dissolved polymer is in subunits having molecular weights that are about 5 to about 150 kDa; and a surfactant; to form one or more fibers that comprise a polymer-surfactant complex and that arrange randomly and evenly in three dimensions when contacting a collecting board of the electrospinning apparatus thereby forming the randomly-oriented 3-D fibrous structure.
    Type: Application
    Filed: July 5, 2013
    Publication date: January 9, 2014
    Inventors: Yiqi Yang, Helan Xu, Shaobo Cai