教師資料查詢 | 類別: 期刊論文 | 教師: 董崇民 Don, Trong-ming (瀏覽個人網頁)

標題:Preparation and characterization of UV-sensitive chitosan for UV-cure with poly(ethylene glycol) dimethacrylate
學年101
學期1
出版(發表)日期2012/08/02
作品名稱Preparation and characterization of UV-sensitive chitosan for UV-cure with poly(ethylene glycol) dimethacrylate
作品名稱(其他語言)
著者Lin, Man-Chin; Tai, Hung-Yin; Ou, Ti-Cheng; Don, Trong-Ming
單位淡江大學化學工程與材料工程學系
出版者Dordrecht: Springer Netherlands
著錄名稱、卷期、頁數Cellulose 19(5), pp.1689-1700
摘要In this study, gel membranes of chitosan-g-poly(ethylene glycol) dimethacrylate (CS-g-PEGDMA) with pH sensitive properties were synthesized without employing any photo-initiator and crosslinker. First, CS was endowed with UV-sensitive property by reaction with cinnamoyl chloride in methanesulfonic acid. The reaction mainly occurred on the hydroxyl groups of the pyranose unit, while most C-2 amino groups were protected. The substitution degree of cinnamoyl group was 0.98, while the protection efficiency of –NH2 was about 80 %. Upon UV-irradiation, initial free radicals were produced only along the cinnamoyl-modified CS chains, which induced the grafting of PEGDMA from the chitosan chains and eventually the crosslinking. Increasing the feeding amount of PEGDMA increased the grafting ratio as well as the crosslinking density. The Tg value decreased from 161 °C for the pure chitosan to about 90 °C for the CS-g-PEGDMA with a grafting ratio of 1.29. Two stages of degradation correspondent to the individual degradation of CS chains and the PEGDMA chains were observed for all CS-g-PEGDMA copolymers, demonstrating their nature of graft copolymers. The tensile mechanical properties of the CS-g-PEGDMA membranes were affected by the two opposing factors: inter-connected soft PEGDMA chains and crosslinking density; and the optimum properties were achieved when the grafting ratio was increased to about 0.80. By combining CS and PEGDMA components, these copolymer membranes thus have the potential to be used as biomedical membranes.
關鍵字Chitosan;Poly(ethylene glycol) dimethacrylate;Cinnamoyl chloride;UV polymerization;Graft copolymer
語言英文
ISSN1572-882X
期刊性質國外
收錄於SCI;
產學合作
通訊作者Don, Trong-Ming
審稿制度
國別荷蘭
公開徵稿
出版型式,電子版,紙本
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