以丙烯酸(AA)、丙烯酰胺(AM)两种单体同时对壳聚糖(CTS)进行接枝改性,合成了具有环境响应性的壳聚糖水凝胶,讨论了各合成因素对凝胶溶胀性能的影响及凝胶对pH值、离子强度和温度的响应性.结果表明,当反应时间为2h～2.5 h、单体与CTS质量比为8:1、反应温度在60℃左右、引发剂用量为0.35%(占单体和CTS总量的百分比,下同)、交联荆用量为0.125%时,制得的水凝胶最高溶胀度可达224 g/g,而且该凝胶同时具有pH值、离子强度和温度敏感性.
The hydrogel which used chitosan(CTS), acrylic acid(AA) and acrylamide(AM) as raw materials was synthesized. The effect of reaction parameters, such as the amount of initiator, crosslinker, AA and AM as well as reaction temperature/time on the swelling behavior and responsive properties of the hydrogel was investigated. The results show that: The gel has the highest swelling ratio when the mass ration of CTS to monomer is 1: 8, the amount of initiator is 0.35% (compare to the mass of monomer), the reaction temperature is 60 ℃, the reaction time is 2 h～2.5 h, and the amount of crosslinker is 0.125% . The hydrogels exhibit pH, ion strength and temperature responsive properties.
参考文献
| [1] | 金淑萍,柳明珠,陈世兰,卞凤玲,陈勇,王斌,詹发禄,刘守信.智能高分子及水凝胶的响应性及其应用[J].物理化学学报,2007(03):438-446. |
| [2] | Ali AEH.;Shawky HA.;Abd el Rehim HA.;Hegazy EA. .Synthesis and characterization of PVP/AAc copolymer hydrogel and its applications in the removal of heavy metals from aqueous solution[J].European Polymer Journal,2003(12):2337-2344. |
| [3] | 江磊,林宝凤,梁兴泉,刘思倩.壳聚糖及其衍生物水凝胶的研究进展[J].化学通报（印刷版）,2007(01):47-51. |
| [4] | Chang K.L.B.;Lin J. .Swelling behavior and the release of protein from chitosan-pectin composite particles[J].Carbohydrate Polymers: Scientific and Technological Aspects of Industrially Important Polysaccharides,2000(2):163-169. |
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