羧甲基二硫代氨基甲酸酯功能化聚氯乙烯树脂的合成及对Ag^+的吸附与选择性能  

SYNTHESIS AND ADSORPTION SELECTIVITY OF CARBOXYETHYL DITHIOAMINOCARBAMATE FUNCTIONALIZED PVC RESIN FOR Ag^+

作　　者：刘春萍[1] 孙琳[1] 马松梅[1] 温全武[1] 曲荣君[1] 

机构地区：[1]鲁东大学化学与材料科学学院,烟台264025

出　　处：《离子交换与吸附》2009年第3期265-273,共9页Ion Exchange and Adsorption

基　　金：鲁东大学自然科学基金(20050902)资助

摘　　要：以聚氯乙烯为大分子骨架,经三乙烯四胺胺化,再与二硫化碳和乙醇钠反应,得到的二硫代氨基羧酸盐改性聚氯乙烯树脂(PV-NS)进一步与氯乙酸钠反应,合成了一种同时含N,S,O的羧甲基二硫代氨基甲酸酯改性聚氯乙烯树脂(PV-NSO)。合成树脂的功能基结构经红外和元素分析确认。对合成树脂的吸附性能研究表明,合成树脂对Ag+、Hg2+、Au3+、Pb2+离子的吸附容量在实验条件下分别达2.058mmol/g、1.514mmol/g、1.125mmol/g和0.415mmol/g,而对Cu2+、Cd2+、Zn2+、Ni2+、Mg2+等离子的吸附容量很小,甚至不吸附。树脂的选择性吸附表明,树脂对Ag+的吸附选择性较好,在有Hg2+、Pb2+、Cd2+、Zn2+、Cu2+或Mg2+共存时,树脂对Ag+的选择性吸附系数分别达4.74、17.33、12.98、∞、7.60和74.14。合成树脂在极性溶剂中的溶胀性能均比在非极性溶剂中好。AA novel carboxymethyl dithioaminocarbamate resin （PV-NSO） was synthesized by a series reactions between polyvinylchloride （PVC）, triethylenetetramine, CS2/C2HsONa and C1CH2COONa. The functional group structure of the resin was confirmed by FTIR spectra and elemental analysis. The adsorption capacities of the resin for Ag^＋, Hg^2＋, Au^3＋, Pb^2＋, Cu^2＋, Cd^2＋, Zn^2＋, Mg^2＋, and Ni^2＋ and adsorption selectivity for Ag^＋ were investigated. The results showed that the adsorption capacities of the resin for Ag^＋, Hg^2＋, Au^3＋ and Pb^2＋ were 2,058retool/g, 1.514mmol/g, 1.125mmol/g and 0.415mmol/g respectively while the adsorption capacities of the resin for Cu^2＋, Cd^2＋, Zn^2＋, Ni^2＋ and Mg^2＋ were lower. The resin had good selectivity for Ag~. Selectivity coefficient of the resin for Ag~ were 4.74, 17.33, 12.98, oo, 7.60, 74.14 while mixed with Hg^2＋, Pb^2＋, Cd^2＋, Zn^2＋, Cu^2＋ and Mg^2＋. The swelling property of the resin in polar solvents was better than those in non-polar solvents.

关 键 词：功能化聚氯乙烯树脂 合成 吸附 选择性 

分 类 号：O647.3[理学—物理化学]