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標題Title: Synthesis and characterization of chitosan-g-poly
作者Authors: 徐楓茜,林鴻儒..等
上傳單位Department: 化學工程與材料工程系
上傳時間Date: 2009-12-1
上傳者Author: 徐楓茜
審核單位Department: 化學工程與材料工程系
審核老師Teacher: 施美秀
檔案類型Categories: 論文Thesis
關鍵詞Keyword: chitosan, poly(acrylic acid), attapulgite
摘要Abstract: A novel chitosan-g-poly(acrylic acid)/attapulgite superabsorbent composite with water absorbency of 159.6 g g1 in distilled water
and 42.3 g g1 in 0.9 wt% NaCl solution was prepared by graft polymerization with chitosan, acrylic acid and attapulgite in aqueous
solution, using N,N0-methylenebisacrylamide as a crosslinker and ammonium persulfate as an initiator. Factors influencing water absorbency
of the superabsorbent composite were investigated, such as average molecular weight of chitosan, weight ratio of acrylic acid to
chitosan, dewatering method, the amount of crosslinker and attapulgite. The result from FTIR spectra showed that –OH of attapulgite,
–OH, –NHCO and –NH2 of chitosan participated in graft polymerization with acrylic acid. The introduced attapulgite enhanced thermal
stability of the chitosan-g-poly(acrylic acid) superabsorbent and formed a loose and more porous surface. Introducing a small amount of
attapulgite also enhanced water absorbency of the chitosan-g-poly(acrylic acid) superabsorbent.

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