自愈水凝胶
环氧氯丙烷
肿胀 的
热重分析
纤维素
水溶液
材料科学
蒸馏水
羧甲基纤维素
化学工程
甲基纤维素
膨胀能力
复合材料
高分子化学
化学
钠
有机化学
色谱法
工程类
冶金
作者
Chunyu Chang,Bo Duan,Jie Cai,Lina Zhang
标识
DOI:10.1016/j.eurpolymj.2009.04.033
摘要
Novel superabsorbent hydrogels were prepared successfully from carboxymethylcellulose sodium (CMC) and cellulose in the NaOH/urea aqueous system by using epichlorohydrin (ECH) as cross-linker. The structure and morphology of the hydrogels were characterized by FT-IR spectroscope, thermogravimetric analysis and scanning electron microscope. The results revealed that the CMC contributed to the enhanced size of pore, whereas cellulose as a strong backbone in the hydrogel to support it for keeping its appearance. Their equilibrium swelling ratio in distilled water and different physiological fluids were evaluated, indicating the maximum swelling ratio in water reached an exciting level of 1000 as the hydrogels still keeping a steady appearance. Moreover, the hydrogels exhibited smart swelling and shrinking in NaCl or CaCl2 aqueous solution, as well as the release behavior of bovine serum albumin (BSA) that could be controlled by changing CMC content. The cellulose-based hydrogels are promising for the applications in the biomaterials area.
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