壳聚糖/聚氨酯树脂的制备及对Cu^(2+)吸附研究

Preparation and copper ions adsorption properties of chitosan/polyurethane resins

以壳聚糖和聚氨酯预聚体为原料制备了壳聚糖/聚氨酯树脂(CTS/PU),考察了其对铜离子吸附性能。结果表明,CTS/PU树脂表面较粗糙;随预聚体用量增大,树脂吸附量先增加后降低。CTS/PU比例为1∶1时,树脂对Cu2+吸附量可达到优;pH值为6时,树脂对Cu2+吸附量最大。动力学研究表明,树脂对Cu2+吸附过程符合准二次动力学模型。

A novel chitosan-based composites （CTS/PU） made of chitosan and polyurethane prepolymer were prepared and were used for the removal of copper ions from aqueous solution.. It was showed that the CTS/PU surface was rough and the adsorption capacity of CTS/PU first increased and then decreased when the amount of prepolymers increased. When the ratio of CTS/PU was 1 ： 1,the uptake of Cu^2＋ on the CTS/PU reached optimal value. The adsorption capacity reached the maximum when pHo value of Cu^2＋ solution was 6. The kinetic experiment datas were better correlated with pseudo second-order kinetic model than the pseudo-first.