淀粉接枝聚丙烯酸高吸水树脂吸附CuSO_4的行为和动力学  

CuSO_4-adsorption behavior of the starch grafted polyacrylic acid superabsorbent and its kinetics

作　　者：杨瑞成[1] 申鹏[1] 杨娟[1] 夏渊[1] 吴量[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050

出　　处：《应用化工》2010年第12期1823-1826,1829,共5页Applied Chemical Industry

基　　金：甘肃省教育厅开放基金项目(SKL05011)

摘　　要：以淀粉和丙烯酸为原料,用水溶液聚合法制备淀粉接枝聚丙烯酸高吸水树脂(St-g-PAA),在20～40℃研究St-g-PAA对CuSO4的吸附行为。结果表明,St-g-PAA对CuSO4的室温吸附行为符合Freundlish关系,等温吸附表达式为:Γe=0.06c0.3(g/g),其吸附过程具有一级反应特征,反应速率常数为:k=6.92×10-9×exp(35.418 4 kJ/RT),吸附过程的表观活化能Ea=-35.418 4 kJ/mol,具有反应温度低、吸附速度快的特点。With starch and acrylic acid as raw marerials,the starch grafted polyacrylic acid（St-g-PAA） superabsorbent was prepared by aqueous solution.The adsorption behavior of CuSO4 by the starch grafted polyacrylic acid was tested and studied at 20～40 ℃.The results showed that the adsorption behavior of CuSO4 by nanocomposite at room temperature was in accordance to Freundlish relationship with an equilibrium absorbing capacity of Γe=0.06c0.3（g/g）,at unit mass the adsorptional process followed after the one-order reaction.The reaction rate constant was k=6.92×10-9exp（35.41 kJ/RT） with the apparent energy Ea=-35.41 kJ/mol.The reaction temperature is low,the adsorption speed is fast.

关 键 词：淀粉 聚丙烯酸高吸水树脂 吸附 动力学 CUSO4 

分 类 号：TB332[一般工业技术—材料科学与工程]