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首页> 外文期刊>Journal of Applied Polymer Science >Ultraviolet-induced decomposition of acrylic acid-based superabsorbent hydrogels crosslinked with N,N-methylenebisacrylamide
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Ultraviolet-induced decomposition of acrylic acid-based superabsorbent hydrogels crosslinked with N,N-methylenebisacrylamide

机译：紫外线诱导与N，N-亚甲基双丙烯酰胺交联的丙烯酸基高吸收性水凝胶的分解

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摘要

Most acrylic acid-based superabsorbent hydrogels, which have been widely used in many applications, are crosslinked with water-solvable crosslinker N,N-methylenebisacrylamide (NMBA), which is easy to hydrolyze when radiated by ultraviolet, leading to decomposition of the superabsorbent hydrogels. In this article, ultraviolet-induced decomposition of acrylic acid-based superabsorbent hydrogels crosslinked with NMBA was investigated by weight loss method under ultraviolet radiation. The results showed that the decomposition rate of the superabsorbent hydrogels was controlled by ultraviolet-induced activation of amide groups on the networks when the intensity of ultraviolet radiation was low, whereas it was controlled by hydrolysis of amide groups on NMBA molecules when the intensity of ultraviolet radiation was high. The ultraviolet stability of acrylic acid-based superabsorbent hydrogels crosslinked with NMBA can be improved by increasing the neutralization degree of acrylic acid, increasing the dosage of crosslinker NMBA, or introducing acrylamide as comonomer. (c) 2008 Wiley Periodicals, Inc.
机译：大多数已在许多应用中广泛使用的丙烯酸基超吸收性水凝胶与水溶性交联剂N，N-亚甲基双丙烯酰胺（NMBA）交联，该交联剂在紫外线辐射下易于水解，导致超吸收性水凝胶分解。本文通过失重法在紫外线辐射下研究了紫外线诱导的与NMBA交联的丙烯酸基超吸收性水凝胶的分解。结果表明，当紫外线辐射强度较低时，高吸收性水凝胶的分解速率受紫外线诱导的酰胺基团在网络上的活化的控制，而当紫外线强度低时，受NMBA分子上酰胺基团的水解控制。辐射很高。通过增加丙烯酸的中和度，增加交联剂NMBA的用量或引入丙烯酰胺作为共聚单体，可以改善与NMBA交联的丙烯酸基超吸收性水凝胶的紫外线稳定性。 （c）2008 Wiley期刊公司

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