Patents by Inventor Junhwa SHIN

Junhwa SHIN 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).

  • Ionic polymer membrane comprising radiation-crosslinkable poly(vinyl alcohol) and method of preparation thereof
    Patent number: 9922773
    Abstract: The present invention provides an ionic polymer membrane prepared by irradiating the compound represented by formula 1 and an ionic polymer. The ionic polymer membrane of the present invention has the advantage of excellent processability, low production costs, high ion exchange capacity and high durability. Also, the method for preparing the ionic polymer membrane of the invention not only facilitates the production of the ionic polymer membrane in a 3-dimensional network structure which has high ion exchange capacity and high dimensional stability but also makes it easy to produce membranes in various forms and sizes by using the composition itself as a coating solution with using the commercialized inexpensive ionic polymer without additional high-risk multi-step introduction process of ionic exchange group.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: March 20, 2018
    Assignee: Korea Atomic Energy Research Institute
    Inventors: Chan Hee Jung, Junhwa Shin, In Tae Hwang, Joon Yong Sohn, Chang-Hee Jung
  • Crosslinked speek cation exchange membrane having improved chemical stability by radiation and method of preparing the same
    Patent number: 9790339
    Abstract: Provided is a method of preparing a crosslinked sulfonated poly(ether ether ketone) (SPEEK) cation exchange membrane including: preparing a crosslinker mixture of a first crosslinker containing two or more vinyl oxy groups and a second crosslinker containing three or more vinyl groups; preparing a mother liquor containing the crosslinker mixture, a SPEEK polymer substituted with sodium, and a solvent; and casting the mother liquor and then irradiating radiation thereon.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: October 17, 2017
    Assignee: KOREA ATOMIC ENERGY RESEARCH INSTITUTE
    Inventors: Junhwa Shin, Joon Yong Sohn, Ju-Myung Song, Sun-Young Lee, Hyun-Su Woo
  • IONIC POLYMER MEMBRANE COMPRISING RADIATION-CROSSLINKABLE POLY(VINYL ALCOHOL) AND METHOD OF PREPARATION THEREOF
    Publication number: 20170098511
    Abstract: The present invention provides an ionic polymer membrane prepared by irradiating the compound represented by formula 1 and an ionic polymer. The ionic polymer membrane of the present invention has the advantage of excellent processability, low production costs, high ion exchange capacity and high durability. Also, the method for preparing the ionic polymer membrane of the invention not only facilitates the production of the ionic polymer membrane in a 3-dimensional network structure which has high ion exchange capacity and high dimensional stability but also makes it easy to produce membranes in various forms and sizes by using the composition itself as a coating solution with using the commercialized inexpensive ionic polymer without additional high-risk multi-step introduction process of ionic exchange group.
    Type: Application
    Filed: June 10, 2016
    Publication date: April 6, 2017
    Applicant: Korea Atomic Energy Research Institute
    Inventors: Chan Hee Jung, Junhwa Shin, In Tae Hwang, Joon Yong Sohn, Chang-Hee Jung
  • CROSSLINKED SPEEK CATION EXCHANGE MEMBRANE HAVING IMPROVED CHEMICAL STABILITY BY RADIATION AND METHOD OF PREPARING THE SAME
    Publication number: 20150133570
    Abstract: Provided is a method of preparing a crosslinked sulfonated poly(ether ether ketone) (SPEEK) cation exchange membrane including: preparing a crosslinker mixture of a first crosslinker containing two or more vinyl oxy groups and a second crosslinker containing three or more vinyl groups; preparing a mother liquor containing the crosslinker mixture, a SPEEK polymer substituted with sodium, and a solvent; and casting the mother liquor and then irradiating radiation thereon.
    Type: Application
    Filed: May 28, 2014
    Publication date: May 14, 2015
    Applicant: KOREA ATOMIC ENERGY RESEARCH INSTITUTE
    Inventors: Junhwa SHIN, Joon Yong SOHN, Ju-Myung SONG, Sun-Young LEE, Hyun-Su WOO