废弃溴代环氧树脂制备螯合材料及其对Cu^(2+)的吸附性能

Preparation of a new chelating material by waste brominated epoxy resin and study on its adsorption properties of Cu^(2+)

以废弃印刷电路板固体废料中的溴代环氧树脂为高分子母体材料,经酸碱预处理后先用乙二胺进行胺化改性,然后再用氯乙酸进行功能化反应,制备了一种含有氨基乙酸基团的新型螯合树脂。通过傅立叶变换红外光谱仪(FTIR)以及13C NMR对其改性前后的树脂结构进行了表征,并测定了改性前后材料对Cu2+的吸附效果,数据表明:改性制备的胺基乙酸螯合树脂对Cu2+具有良好的吸附效果。此外,通过考察氯乙酸功能化反应过程中反应温度、反应时间以及氯乙酸的用量对改性产物吸附Cu2+的性能影响,确定了改性制备该螯合树脂的最佳工艺参数。结果表明:当树脂用量与氯乙酸的用量比为1∶1时,在60℃下反应8h,改性所得的螯合树脂对Cu2+的吸附效果最佳,最大的吸附容量达到4.727mg/g。

A aminated resin was prepared using the waste printed circuit board powder,with brominated epoxy resin as the polymer matrix material,pretreated with acid and alkali,then modified using ethylenediamine. A novel chelating resin containing amino acetic acid group was synthetized with the reaction between the aminated resin and chloroacetic acid. It was characterized by FTIR and 13C NMR. The effects of the modified materials on Cu2＋adsorption for were investigated. The results showed that the modified chelate resin had good adsorption effect on Cu2＋. The optimum parameters of preparing this chelating resin was determined by examining the different reaction temperature,reaction time and chloroacetic acid dosage’s effects on adsorption properties of Cu2＋. The results also demonstrated that when the ratio between amine resin and chloroacetic acid dosage was 1∶1,and reaction at 60℃ for 8h,the chelating resin exhibited best adsorption of Cu2＋,and its maximum adsorption capacity was up to 4.727 mg/g.