Unprecedented Acid-Promoted Polymerization and Gelation of Acrylamide

A Serendipitous Discovery

Siew Yin Chan, Shermin S. Goh, Qingqing Dou, Benjamin Qi Yu Chan, Wee Sim Choo, David James Young, Xian Jun Loh

Research output: Contribution to journalArticleResearchpeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)1797-1804
Number of pages8
JournalChemistry - An Asian Journal
Volume13
Issue number14
DOIs
Publication statusPublished - 16 Jul 2018
Externally publishedYes

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Acrylamide
Gelation
Polymerization
Free Radicals
Acids
Sonication
Hydrogels
Hydrogen Bonding
Hydrogen bonds
Irradiation
Oxygen
pectin

Cite this

Chan, Siew Yin ; Goh, Shermin S. ; Dou, Qingqing ; Chan, Benjamin Qi Yu ; Choo, Wee Sim ; Young, David James ; Loh, Xian Jun. / Unprecedented Acid-Promoted Polymerization and Gelation of Acrylamide : A Serendipitous Discovery. In: Chemistry - An Asian Journal. 2018 ; Vol. 13, No. 14. pp. 1797-1804.
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Unprecedented Acid-Promoted Polymerization and Gelation of Acrylamide : A Serendipitous Discovery. / Chan, Siew Yin; Goh, Shermin S.; Dou, Qingqing; Chan, Benjamin Qi Yu; Choo, Wee Sim; Young, David James; Loh, Xian Jun.

In: Chemistry - An Asian Journal, Vol. 13, No. 14, 16.07.2018, p. 1797-1804.

Research output: Contribution to journalArticleResearchpeer-review

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