高羰基含量水溶性氧化淀粉-氨基噻唑希夫碱的合成及吸附性能

Synthesis and adsorption performance of aminothiazole Schiff-base of water soluble oxidized starch with high carbonyl content

摘要:

以次氯酸钠氧化制备的高羰基含量水溶性氧化淀粉为原料合成了水溶性氧化淀粉-氨基噻唑希夫碱（OSAT），确定最佳反应条件为：N2保护、水为溶剂、乙酸调节pH、初始pH = 5、反应温度 70 ℃、反应时间16h。通过调节氨基噻唑与羰基的比例调控氨基噻唑取代度，醛基利用率100%。通过FT-IR、NMR和UV对OSAT的结构进行了表征。研究了OSAT对Cu2+、Ag+的吸附性能，结果表明取代度为0.14的OSAT对Cu2+、Ag+的吸附量分别为0.82、1.48 mmol/g。

Abstract:

Oxidized starch-aminothiazole Schiff-base (OSAT) was synthesized based on the reaction of aminothiazole (AT) and water soluble oxidized starch with high carbonyl content which was prepared by the oxidation of sodium hypochlorite. The synthesis conditions of OSAT were studied and the optimum conditions were as follows: nitrogen protection, water as solvent, adjusting the pH value of solution by acetic acid, pH = 5, T = 70 ℃, t = 16h. The substitution degrees of AT chould be adjusted by controlling the molar ratio of AT to carbonyl groups and the aldehyde groups utilization rate of 100% was achieved. The structure of OSAT was characterized by FT-IR, NMR and UV. The adsorption performance of OSAT to Cu2+ and Ag+ was also studied. The result showed that the adsorption capacity of OSAT (degree of substitution is 0.14) to Cu2+ and Ag+ was 0.82, 1.48 mmol/g, respectively.