Cellular compatibility of copolymer hydrogels based on site-selectively-modified chitosan with poly(N-isopropyl acrylamide)
學年 99
學期 2
出版（發表）日期 2011-04-01
作品名稱 Cellular compatibility of copolymer hydrogels based on site-selectively-modified chitosan with poly(N-isopropyl acrylamide)
作品名稱（其他語言）
著者 Don, Trong-Ming; Chou, Shu-Chung; Cheng, Liao-Ping; Tai, Hung-Yin
單位 淡江大學化學工程與材料工程學系
出版者 Hoboken: John Wiley & Sons, Inc.
著錄名稱、卷期、頁數 Journal of Applied Polymer Science, 120(1), pp.1–12
摘要 This research synthesized graft copolymers of chitosan-g-poly(N-isopropyl acrylamide) (CS-g-PNIPAAm) by UV-initiated free-radical polymerization of NIPAAm monomer to CS selectively at the C-6 position of pyranose ring. First, amino groups in CS were protected by reaction with phthalic anhydride (PA) to form PACS. The degree of phthaloylation was carefully controlled to ensure that most amino groups were protected, and only a very small amount of hydroxyl groups were reacted. In the second step, the vinyl functional group was introduced to the PACS by reaction with a vinyl compound containing an isocyanate group (3-isopropenyl-αα′-dimethylbenzyl isocyanate), through the urethane linkage with hydroxyl groups at the C-6 position. The phthaloyl groups were then removed by hydrazine to recover the amino groups in CS. Finally, PNIPAAm was grafted to the vinyl CS at the C-6 position by UV-initiated free-radical polymerization. The synthesized CS-g-PNIPAAm copolymers were confirmed to have a structure of an AB-crosslinked graft copolymer. Respectively, these copolymer hydrogels exhibited pH- and thermal-responsive swelling properties in an aqueous solution due to their CS and PNIPAAm components. The test of cell viability with L929 fibroblast revealed that the CS-g-PNIPAAm copolymers having a grafting ratio lower than 1.7 had cellular compatibility as good as pure CS.
關鍵字 chitosan; poly(N-isopropyl acrylamide); graft copolymer; hydrogel
語言 en
ISSN 1097-4628
期刊性質 國外
收錄於 SCI EI
產學合作
通訊作者 Don, Trong-Ming
審稿制度 是
國別 USA
公開徵稿
出版型式 電子版
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