US 12,234,306 B2
Method to prepare polymer materials with interlocked porous structures by freezing and demulsification of emulsion
Qian Zhao, Hangzhou (CN); Di Chen, Hangzhou (CN); Yongbo Jiang, Hangzhou (CN); and Tao Xie, Hangzhou (CN)
Assigned to ZJU-HANGZHOU GLOBAL SCIENTIFIC AND TECHNOLOGICAL INNOVATION CENTER, Hangzhou (CN)
Filed by ZJU-HANGZHOU GLOBAL SCIENTIFIC AND TECHNOLOGICAL INNOVATION CENTER, Zhejiang (CN)
Filed on May 12, 2021, as Appl. No. 17/319,011.
Claims priority of application No. 202010402402.X (CN), filed on May 13, 2020.
Prior Publication US 2021/0355252 A1, Nov. 18, 2021
Int. Cl. C08J 9/28 (2006.01); B01D 39/16 (2006.01); C08F 20/14 (2006.01); C08F 20/18 (2006.01)
CPC C08F 20/14 (2013.01) [B01D 39/1623 (2013.01); C08F 20/18 (2013.01); C08J 9/28 (2013.01); C08J 9/283 (2013.01); B01D 2239/0442 (2013.01); B01D 2239/0618 (2013.01); B01D 2239/0622 (2013.01); C08J 2201/0484 (2013.01); C08J 2333/08 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method to prepare polymer materials with interlocked porous structures by freezing and demulsification of emulsion, comprising the following steps:
(1) preparing an emulsion containing uncrosslinked polymers and crosslinking agents, wherein the uncrosslinked polymers are presented in an organic phase, and the crosslinking agents are presented in the organic phase or a water phase; under freezing, demulsification occurs and leads to interaction between the uncrosslinked polymers and the crosslinking agents; and
(2) after removing ice crystals, obtaining polymer materials with interlocked porous structures;
wherein, in step (1), the crosslinking agents are one or a combination of two of hexamethylene diamine, triethyl hydrazide, triethylenetetramine, dithiothreitol, or methylene bisacrylamide.