淀粉接枝丙烯酸甲酯与乙二胺合成高分子螯合剂

Macromolecule Chelator Synthesized from Ethylene Diamine and Methyl Acrylate Grafted Starch

以淀粉为原料,接枝丙烯酸甲酯,然后与乙二胺反应,合成了具有多个酰胺基和胺基的螯合淀粉(SMAEN)。接枝淀粉(SMA)的接枝率(GP)和接枝效率(GE)分别为44.14%和18.42%。由凯式定氮法测得此螯合淀粉的含氮量为2.86%。红外光谱分析结果表明,淀粉已经成功地被接枝和螯合。将螯合淀粉用于对铜离子和银离子的吸附,结果表明,对铜离子和银离子的吸附量分别为:3.328和1.667 mmol/g。

A chelating starch containing multiple amidocyanogen and acyl groups was synthsized from starch grafted with methyl acrylate and ethylene diamine. The grafting degree and grafting efficiency for the grafted starch（SMA） were 44. 14% and 18.42% respectively. The nitrogen content of the chelating starch determined by micro-Kjeldahl method was 2. 86%. The structure of the chelating starch was determined by FTIR. This chelating starch was used to chelate copper（ Ⅱ ） and argentum （ Ⅰ ） ions, and thermal gravity analysis was used to determine the mass loss of the chelated starch before and after adsorption of the metal ions to estimate the adsorption capacities, which were 3. 328 mmol/g and 1. 667 mmol/g for Cu^2＋ and Ag^＋ , respectively.