采用紫外光接枝法,以丙烯酸(AA)为功能单体,N,N-亚甲基双丙烯酰胺(MBA)为交联剂,在聚丙烯(PP)滤芯棉表面进行交联接枝共聚,制备出交联接枝率为220％的丙烯酸表面修饰PP棉.用红外光谱对交联接枝共聚物的结构进行了表征.其最佳工艺条件为引发剂二苯甲酮(BP)用量为0.50 g/100g AA,MBA用量为5.0 g/100 g AA,AA与PP质量比为5∶1,光照时间为25 min.采用平衡吸附法研究了丙烯酸表面修饰PP棉对重金属Cd2+的吸附性能.结果表明,当Cd2+初始质量浓度低于50 mg·L-1时,丙烯酸修饰PP棉对Cd2+的吸附率可达到95％以上.在研究的浓度范围内,丙烯酸修饰PP棉对Cd2+的吸附不符合Langrnuir和Freundlich模型.
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