US 12,454,583 B1
Quaternized cellulose-based resin and preparation method and application thereof
Jinming Luo, Shanghai (CN); Jinjing Huang, Shanghai (CN); and Kaixing Fu, Shanghai (CN)
Assigned to Shanghai Jiao Tong University, Shanghai (CN)
Filed by Shanghai Jiao Tong University, Shanghai (CN)
Filed on Mar. 1, 2025, as Appl. No. 19/067,838.
Claims priority of application No. 202410545679.6 (CN), filed on Apr. 30, 2024.
Int. Cl. C08B 15/06 (2006.01); C02F 1/28 (2023.01); C02F 101/14 (2006.01); C08G 81/02 (2006.01)
CPC C08B 15/06 (2013.01) [C02F 1/285 (2013.01); C08G 81/02 (2013.01); C02F 2101/14 (2013.01)] 3 Claims
 
1. A preparation method of a quaternized cellulose-based resin, comprising the following steps:
(1) mixing a cellulose solution, sodium hydroxide, urea and water to obtain a mixture, and then sequentially subjecting the mixture to pre-cooling and high-speed mixing to obtain a cellulose solution, wherein a rotating speed of the high-speed mixing is 500 rpm to 1000 rpm, the high-speed mixing is ultrasonic mixing, power of the ultrasonic mixing is 1000 W to 1200 W, and the ultrasonic mixing lasts for 10 minutes to 30 minutes;
wherein a temperature of the high-speed mixing is 25° C. to 45° C., and the high-speed mixing lasts for 5 minutes to 30 minutes;
the cellulose solution comprises cellulose and water;
a mass ratio of cellulose to the urea in the cellulose solution is 1:25 to 100;
a mass ratio of the cellulose to the sodium hydroxide in the cellulose solution is 1:25 to 100,
a mass ratio of the urea to the water is 1:2 to 11;
a temperature of the pre-cooling is −10° C. to −50° C., and the pre-cooling lasts for 1 hour to 5 hours; and a device for the pre-cooling is a refrigerator;
(2) dropping a 3-chloro-2-hydroxypropyl trimethyl ammonium chloride aqueous solution into the cellulose solution, mixing for a quaternization reaction to obtain a quaternized cellulose solution, wherein a rate of the dropping is 30 drops/minute to 90 drops/minute; and a rate of the mixing is 300 rpm to 800 rpm, a temperature of the mixing is 25 to 35° C., and the mixing lasts for 12 to 16 hours;
a temperature of the quaternization reaction is 25° C. to 50° C.; and
(3) mixing the quaternized cellulose solution with chloromethylated polystyrene for a high-temperature reaction, wherein a particle size of the chloromethylated polystyrene is 0.315 mm to 1.250 mm, and a temperature of the high-temperature reaction is 100° C. to 150° C., so as to obtain the quaternized cellulose-based resin;
wherein the high-temperature reaction lasts for 10 to 15 hours, a mass ratio of the chloromethylated polystyrene to the quaternized cellulose is 1 to 10:1.