壳聚糖对化学镀前处理中Pd^(2+)的吸附行为  

Adsorption behavior of chitosan for Pd(Ⅱ) ion in electroless plating pretreatment

作　　者：马跃辉[1] 张佳萌[1] 王炜[1] 

机构地区：[1]东华大学化学化工与生物工程学院,上海201620

出　　处：《印染助剂》2009年第8期15-18,21,共5页Textile Auxiliaries

摘　　要：以壳聚糖为涤纶织物表面的载体层,研究了其对活化液中钯离子(Pd2+)的吸附性能.结果表明,活化液初始质量浓度及温度对PET-CS吸附Pd2+有显著影响,在活化液初始质量浓度为40～50mg/L、温度为60℃时,吸附效果最好.壳聚糖对钯离子的吸附较符合二级吸附动力学方程,室温下,反应速率常数为0.1743min-1,可推知,此吸附反应是化学吸附,该吸附行为更符合Langmuir吸附等温式,可认为是单分子层吸附.红外图谱分析表明:Pd2+与壳聚糖中—NH2、—OH发生了配位反应.Adsorption capability of chitosan as the carrier of polyester fabric surface for Pd（Ⅱ） in the activate fluids was studied. The results indicate that the initialized concentration and temperature of activate fluids have notable effects on the adsorption of PET-CS to Pd（Ⅱ）. The best absorption could be obtained while the initial concentration of activate fluids was 40-50 mg/L and at 60 ℃. The adsorption of chitosan for Pd（Ⅱ） correlated well with the second-order kinetic equation. The adsorption velocity constant was 0.174 3 min^-1 at room temperature, which suggested that the adsorption was chemical adsorption. The adsorption of chitosan for Pd（ll） was well accords with the Langmuir isotherm equation, which could be considered as single-mofecular layer adsorption. Infrared spectroscopy indicate that Pd（ll） reacted with --NH2 and --OH of chitosan by coordination reaction.

关 键 词：钯 壳聚糖 吸附等温线方程 吸附动力学 

分 类 号：TQ314[化学工程—高聚物工业] TQ268