US 11,987,674 B2
Method for preparing anisotropic cellulose-based hydrogel
Xianhai Zeng, Fujian (CN); Guihua Yan, Fujian (CN); Lu Lin, Fujian (CN); Yong Sun, Fujian (CN); and Xing Tang, Fujian (CN)
Assigned to XIAMEN UNIVERSITY, Fujian (CN)
Filed by XIAMEN UNIVERSITY, Fujian (CN)
Filed on Aug. 22, 2023, as Appl. No. 18/236,549.
Application 18/236,549 is a continuation of application No. PCT/CN2021/085390, filed on Apr. 2, 2021.
Claims priority of application No. 202110199510.6 (CN), filed on Feb. 22, 2021.
Prior Publication US 2023/0407015 A1, Dec. 21, 2023
Int. Cl. C08J 3/075 (2006.01); C08B 15/06 (2006.01); C08F 251/02 (2006.01)
CPC C08J 3/075 (2013.01) [C08B 15/06 (2013.01); C08F 251/02 (2013.01); C08J 2351/02 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for preparing anisotropic cellulose-based hydrogel, comprising
(1) obtaining dialdehyde cellulose by oxidizing cellulose using sodium periodate;
(2) ammoniating the dialdehyde cellulose to obtain ammoniated cellulose derivatives;
(3) performing Schiff reaction using the ammoniated cellulose derivatives and dopamine to obtain cellulose-dopamine nanosheets;
(4) depositing Fe3O4 nanopartides on a surface of the cellulose-dopamine nanosheets by a deposition method to obtain magnetic cellulose-dopamine nanosheets; and
(5) forming the anisotropic cellulose-based hydrogel using the magnetic cellulose-dopamine nanosheets by a polymerization method.