CELLULOSE NANOCRYSTAL POWDER, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOF

Title:

CELLULOSE NANOCRYSTAL POWDER, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOF

Document Type and Number:

WIPO Patent Application WO/2023/000550

Kind Code:

A1

Abstract:

Embodiments of the present application relate to the field of nanomaterials, and to cellulose nanocrystal powder, a preparation method therefor, and an application thereof. The preparation method comprises the following steps: 1) dispersing a cellulose nanocrystal in water, and adjusting a pH value to 7; 2) adding a carboxylate into the aqueous dispersion in step 1), and uniformly stirring; and 3) adding a monomer and a ceric ammonium nitrate initiator to the system in step 2), reacting for 0.5-3 h to obtain a precipitate, and performing suction filtration, washing and drying on the precipitate to obtain cellulose nanocrystal powder. In the present application, a small amount of a carboxylate is added to a system in which the modification of a cellulose nanocrystal graft polymer is initiated by ceric ammonium nitrate, and a carboxylic acid salt is used for complexing cerium ions in ceric ammonium nitrate having an initiation effect, such that the hydrolysis of cerium ions is inhibited, and a polymerization reaction can be initiated by ceric ammonium nitrate under an acid-free condition, thereby achieving the polymerization of a polyvinyl acetate monomer on the surface of the cellulose nanocrystal. The preparation method of the present application is not limited by a surface functional group of the cellulose nanocrystal.

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Inventors:

ZHANG JIANMING (CN)
LIU YUNXIAO (CN)
DUAN YONGXIN (CN)
ZHOU LIJUAN (CN)
LU YUNJIE (CN)
LIU XINRAN (CN)

Application Number:

PCT/CN2021/129803

Publication Date:

January 26, 2023

Filing Date:

November 10, 2021

Export Citation:

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Assignee:

QINGDAO UNIV OF SCIENCE AND TECHNOLOGY (CN)

International Classes:

C08F251/02; C08F218/08; C08L51/02

Foreign References:

CN113402670A	2021-09-17
CN105111378A	2015-12-02
CN104086709A	2014-10-08
CN110885405A	2020-03-17
US20110201755A1	2011-08-18

Attorney, Agent or Firm:

BEIJING YUEHE INTELLECTUAL PROPERTY AGENCY CO., LTD et al. (CN)

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