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公开(公告)号：US11008427B2
公开(公告)日：2021-05-18
申请号：US16138752
申请日：2018-09-21
发明人： Jihoon Shin , Yeong Un Kim , Min Woo Lee , Bong Keun Song
摘要： 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.
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公开(公告)号：US11649300B2
公开(公告)日：2023-05-16
申请号：US16999157
申请日：2020-08-21
发明人： Jihoon Shin , Hyunho Lee , Yeong Un Kim
CPC分类号： C08B37/003 , B01J19/085
摘要： 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.
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公开(公告)号：US11332598B2
公开(公告)日：2022-05-17
申请号：US16811903
申请日：2020-03-06
发明人： Jihoon Shin , Haemin Jeong , Nam-Kyun Kim , Young-Wun Kim
IPC分类号： C08K5/11 , C07C67/465 , C07C69/34
摘要： 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.
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