公开(公告)号：US11753510B2

公开(公告)日：2023-09-12

申请号：US17597430

申请日：2020-05-28

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Sung Yeon Hwang ,  Jeyoung Park ,  Dong Yeop Oh ,  Tae Ho Kim ,  Si Gyeong Lee ,  Myung Suk Shin ,  Jong Geon Jegal

IPC: C08J5/04 ,  C08G63/12 ,  C08G63/81 ,  C08K7/02

CPC classification number: C08J5/045 ,  C08G63/12 ,  C08G63/81 ,  C08K7/02 ,  C08G2230/00 ,  C08J2367/02 ,  C08K2201/005 ,  C08K2201/011 ,  C08K2201/018

Abstract: A biodegradable composite material which is produced by polymerizing a mixture of an aqueous dispersion of a natural polymer nanofiber including any one or more of a chitin nanofiber and a cellulose nanofiber, a dicarboxylic acid or a derivative thereof, and a diol. The biodegradable composite material has excellent biodegradable and mechanical properties.

公开(公告)号：US09975995B2

公开(公告)日：2018-05-22

申请号：US14709264

申请日：2015-05-11

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Young Taik Hong ,  Jang Yong Lee ,  Tae Ho Kim ,  Duk Man Yu ,  Seog Je Kim

IPC: C08F283/00 ,  E01C7/26 ,  C08G65/48 ,  H01M8/1023 ,  H01M8/18 ,  C08G61/10 ,  C08G61/12 ,  H01M8/0221 ,  H01M8/20 ,  C08G65/40 ,  H01M8/1032 ,  H01M8/1018

CPC classification number: C08G65/48 ,  C08G61/10 ,  C08G61/12 ,  C08G65/4012 ,  C08G2261/126 ,  C08G2261/142 ,  C08G2261/1452 ,  C08G2261/148 ,  C08G2261/312 ,  C08G2261/3444 ,  C08G2261/412 ,  C08G2261/516 ,  H01M8/0221 ,  H01M8/1023 ,  H01M8/1032 ,  H01M8/188 ,  H01M8/20 ,  H01M2008/1095 ,  H01M2300/0082 ,  Y02E60/528 ,  Y02P70/56

Abstract: The present invention relates to an ion conducting polymer including a partially branched block copolymer; a method of preparing the same; an ion conductor including the ion conducting polymer; an electrolytic membrane including the ion conducting polymer; a membrane-electrode assembly comprising the electrolytic membrane, and a battery comprising the same; and a separation membrane for a redox flow battery including the ion conducting polymer, and a redox flow battery comprising same. Specifically, the partially branched block copolymer includes: a first block including a hydrophilic first polymer; a second block derived from a hydrophobic second polymer having two or more reactive groups respectively on its both ends, in such a way as to form branching points forming side branches on a main chain; and optionally a third block including a hydrophobic third polymer. The ion conducting polymer in the form of a partially branched block copolymer can prepare a polymer membrane having improved conductivity and superior physical properties such as tensile strength elongation at break, etc., while having the same or similar ion-exchange capacity (IEC), percentage water absorption and/or degree of dimensional change compared to conventional ion conducting polymers in the form of linear block copolymers. Because of such outstanding physical properties, the polymer membrane can be used as a membrane-electrode assembly for a fuel cell, and a redox flow battery comprising the same as a separation membrane can exhibit outstanding cell performance and maintain high discharge charge capacity retention rate even when repeatedly charged and discharged several times.