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

S Y Chan; S S Goh; Q Dou; B Q Y Chan; Wee Sim Choo; David James Young; Xian Jun Loh

doi:10.1002/asia.201800552

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

Journal article

Peer reviewed

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

S Y Chan, S S Goh, Q Dou, B Q Y Chan, Wee Sim Choo, David James Young and Xian Jun Loh

Chemistry - An Asian Journal, Vol.13(14), pp.1797-1804

2018

DOI: https://doi.org/10.1002/asia.201800552

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Abstract

acrylamide

cross-linking

gelation

hydrogels

polymerization

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.

Details

Title: Unprecedented Acid-Promoted Polymerization and Gelation of Acrylamide: A Serendipitous Discovery
Authors: S Y Chan (Author) - Institute of Materials Research and Engineering (IMRE), Singapore
S S Goh (Author) - Institute of Materials Research and Engineering (IMRE), Singapore
Q Dou (Author) - Institute of Materials Research and Engineering (IMRE), Singapore
B Q Y Chan (Author) - Institute of Materials Research and Engineering (IMRE), Singapore
Wee Sim Choo (Corresponding Author) - Monash University Malaysia, Malaysia
David James Young (Corresponding Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Xian Jun Loh (Corresponding Author) - Institute of Materials Research and Engineering (IMRE), Singapore
Publication details: Chemistry - An Asian Journal, Vol.13(14), pp.1797-1804
Publisher: Wiley - V C H Verlag GmbH & Co. KGaA
Date published: 2018
DOI: 10.1002/asia.201800552
ISSN: 1861-471X
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99451243202621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Chemistry, Multidisciplinary