【摘要】 将黑荆树单宁与多聚甲醛在有机分散剂液体石蜡中发生反相悬浮聚合反应,制备出一种球状单宁螯合树脂,并通过正交试验得出适宜的合成条件为:单宁与多聚甲醛的质量比为12∶1、反应温度67℃、反应时间3.5h、石蜡体积65mL。利用红外光谱、X射线衍射、热分析和扫描电镜等方法对单宁螯合树脂结构与性能变化进行深入研究;并初步探讨了单宁螯合树脂与Cr6+之间的作用机理。更多还原

【Abstract】 Using black wattle tannin and paraformaldehyde in fluid-wax as organic dispersant,a spherical tannin-chelated resin was prepared through inverse-suspension polymerization.The condition of reaction was determined by means of orthognonal experiment.The optimal condition of synthesis was:m(tannins)∶m(paraformaldehyde)12∶1,reaction temperature 67 ℃,reaction time 3.5 h,fluid-wax volume 65 mL.The structure of the product was characterized by Fourier transform IR,XRD,TG,DSC and SEM.The adsorption mechanism of tannin-chelated resin toward Cr6+ was investigated.更多还原