Unprecedented Acid-Promoted Polymerization and Gelation of Acrylamide: A Serendipitous Discovery

被引：13

作者：

Chan, Siew Yin ^{[1
,2
]}

Goh, Shermin S. ^{[2
]}

Dou, Qingqing ^{[2
]}

Chan, Benjamin Qi Yu ^{[2
,3
]}

Choo, Wee Sim ^{[1
]}

Young, David James ^{[1
,2
,4
]}

Loh, Xian Jun ^{[2
,3
,5
]}

机构：

[1] Monash Univ Malaysia, Sch Sci, Jalan Lagoon Selatan, Bandar Sunway 47500, Selangor, Malaysia

[2] ASTAR, IMRE, 2 Fusionopolis Way,08-01 Innovis, Singapore 138634, Singapore

[3] Natl Univ Singapore, Dept Mat Sci & Engn, 9 Engn Dr 1, Singapore 117575, Singapore

[4] Univ Sunshine Coast, Fac Sci Hlth Educ & Engn, Maroochydore, Qld 4558, Australia

[5] SERI, 11 Third Hosp Ave, Singapore 168751, Singapore

来源：

CHEMISTRY-AN ASIAN JOURNAL | 2018年 / 13卷 / 14期

关键词：

acrylamide; cross-linking; gelation; hydrogels; polymerization; EGG-BOX MODEL; CAPILLARY-ELECTROPHORESIS; GEL-ELECTROPHORESIS; POLYACRYLAMIDE-GELS; HYDROGELS; PECTINS; PERSULFATE;

D O I：

10.1002/asia.201800552

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Dilute acid polymerizes degassed, aqueous acrylamide with concomitant gelation, without the need for added free radical initiator or cross-linking agent. This reaction is accelerated by sonication or UV irradiation, but inhibited by adventitious oxygen or the addition of a free radical inhibitor, suggesting an acid-accelerated free radical process. The resulting hydrogels are thixotropic in nature and partially disrupted by the addition of chaotropic agents, indicating the importance of hydrogen bonding to the 3D network. This discovery was made while trying to prepare pectin-polyacrylamide hydrogels. We observed that pectin initiated the gelation of acrylamide, but only if the aqueous pectin samples had a pH lower than ca. 5.

引用

页码：1797 / 1804

页数：8

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