| 两性纤维素接枝共聚物CGAD水溶液的性质 |
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| 引用本文： | 谭业邦.两性纤维素接枝共聚物CGAD水溶液的性质[J].中山大学学报(自然科学版),1998,37(3):76-80. |
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| 作者姓名： | 谭业邦 |
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| 作者单位： | 中山大学高分子研究所／高分子材料工程国家重点实验室 |
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| 基金项目： | 广东省自然科学基金,中国科学院纤维素化学开放实验室基金 |
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| 摘 要： | 制备了羧甲基纤维素钠接枝丙烯酰胺和甲基丙烯酸二甲胺基乙酯盐酸盐共聚物（ＣＧＡＤ），用红外光谱和元素分析对其组成进行了分析．用浊度法测定了它的溶解性，实验发现ＣＧＡＤ具有两性聚合物的特征，有等电点存在，且与组成有关．用粘度法测定了其水溶液的粘度行为，发现温度升高或溶液老化都使溶液的特性粘度降低，外加盐浓度在一定浓度时特性粘度出现最大值．此外，ＣＧＡＤ水溶液在纤维素酶的存在下能够降解．
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| 关 键 词： | 两性高分子，纤维素接枝共聚物，溶解性，粘度行为，酶解 |
Solution Properties of Amphoteric Cellulose Graft Copolymer CGAD |
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| Tan Yebang Zhang Liming,Li Zhuomei.Solution Properties of Amphoteric Cellulose Graft Copolymer CGAD[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,1998,37(3):76-80. |
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| Authors: | Tan Yebang Zhang Liming Li Zhuomei |
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| Institution: | Tan Yebang Zhang Liming Li Zhuomei |
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| Abstract: | The amphoteric cellulose graft copolymer CGAD was synthesized by the graft copolymerization of sodium carboxymethylcellulose with dimethylaminoethyl methylacrylate and acrylamide. The compositions of CGAD were characterized by IR and elemental analysis. The solubility of CGAD in water depended on pH and the concentration of the added salt. The curves of intrinsic viscosity for CGAD versus pH in NaCl solution showed minima, indicating the existence of isoelectric point. At the same time, the intrinsic viscosity of CGAD solution decreased with increasing temperature.All these results showed the characteristics of the amphoteric polymer. Meanwhile the graft copolymer CGAD in aqueous solution could be degradated in presence of cellulose enzyme. |
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| Keywords: | amphoteric polymer cellulose graft copolymer solubility viscosity behavior degradation |
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