公开(公告)号：US20190023857A1

公开(公告)日：2019-01-24

申请号：US16138752

申请日：2018-09-21

Applicant: Korea Research Institute of Chemical Technology

Inventor： Jihoon SHIN ,  Yeong Un KIM ,  Min Woo LEE ,  Bong Keun SONG

IPC: C08J3/14 ,  C08B1/00

Abstract: The present invention relates to a method for preparing a non-acid-treated eco friendly cellulose nanocrystal and the cellulose nanocrystals prepared by the same. The methods for preparing the non-acid-treated cellulose nanocrystal and extracting the cellulose nanocrystal from cellulosic materials of the present invention are eco-friendly methods, compared with the conventional preparation method for cellulose nanocrystal based on acid-hydrolysis; are efficient due to the total energy saving process; are easy to utilize side products; and are characterized by high yield to produce the target cellulose nanocrystal. The nanocrystal prepared according to the present invention exhibits equivalent or higher aspect ratio, yield and crystallinity than the cellulose nanocrystal prepared through acid hydrolysis, and has remarkably excellent thermal stability, so that it can be effectively used for the production of membranes, electrical and electronic parts, substrates, heat insulating materials, and reinforcing materials required for durability against heat.

公开(公告)号：US20210054107A1

公开(公告)日：2021-02-25

申请号：US16999157

申请日：2020-08-21

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Jihoon SHIN ,  Hyunho LEE ,  Yeong Un KIM

IPC: C08B37/08

Abstract: The present disclosure relates to a method for extracting chitin nanocrystals through electron beam irradiation comprising the steps of: (i) irradiating a chitin-based solid material with an electron beam; (ii) washing the chitin-based solid material subjected to electron beam irradiation; (iii) adding a basic solution to the washed chitin-based solid material; (iv) high-pressure homogenizing the chitin-based solid material dispersed in an aqueous system to which the basic solution is added, to prepare a suspension containing chitin nanocrystals.

公开(公告)号：US20200325301A1

公开(公告)日：2020-10-15

申请号：US16811903

申请日：2020-03-06

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Jihoon SHIN ,  Haemin JEONG ,  Nam-Kyun KIM ,  Young-Wun KIM

IPC: C08K5/11 ,  C07C69/34 ,  C07C67/465

Abstract: Disclosed herein is an acetylated lactide oligomer-based plasticizer and a method of preparing the same having improved thermal stability, enhanced plasticity and excellent compatibility with a resin, the method, including: (a) synthesizing a lactide oligomer through ring-opening polymerization (ROP) of an initiator and lactide; (b) putting acetic anhydride into the lactide oligomer and performing acetylation; and (c) removing acetic acid generated in step (b) and unreacted acetic anhydride

公开(公告)号：US20240174807A1

公开(公告)日：2024-05-30

申请号：US18238600

申请日：2023-08-28

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Jihoon SHIN ,  Sae Hume Park ,  Seungju Hong

IPC: C08G69/44

CPC classification number: C08G69/44

Abstract: Provided are a multiblock copolymer containing polylactide and polyamide for toughening polylactide and a method for preparing the same, wherein the multiblock copolymer containing polylactide and polyamide has an effect of overcoming the brittleness and providing a toughened polylactide-containing copolymer.

公开(公告)号：US20230110936A1

公开(公告)日：2023-04-13

申请号：US17951317

申请日：2022-09-23

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Jihoon SHIN ,  Sae Hume PARK ,  Jeong suk YUK ,  Hyun Ho LEE

IPC: C08J5/04 ,  C08J5/18 ,  C08L1/02

Abstract: Provided are a bacterial nanocellulose transparent film, a manufacturing method thereof, and a packaging material including a food packaging material or an electronic product packaging material using the same capable of newly manufacturing a bacterial nanocellulose transparent film with an oxygen barrier property, a moisture barrier property, or a UV barrier property by performing electron beam irradiation and a film process on bacterial cellulose.

公开(公告)号：US20220259362A1

公开(公告)日：2022-08-18

申请号：US17665137

申请日：2022-02-04

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Jihoon SHIN ,  Sae Hume PARK ,  Jeong Suk YUK

IPC: C08F290/14 ,  C08G63/85 ,  C08G63/91 ,  C08G63/08

Abstract: Provided are a preparing method of a superelastomer, a superelastomer prepared using the same, and a molded article containing the superelastomer, and the superelastomer can be used as a biomaterial replacing soft tissues due to excellent strain at break and elastic recovery.