摘要
采用静电纺丝技术制备了聚苯乙烯/聚偏氟乙烯静电纺丝纤维(SF),通过黏附在SF上的聚多巴胺(PDA)涂层,将羧基化β环糊精(c-CD)键合至SF表面,制备了功能化c-CD/PDA@SF复合纤维膜.对复合纤维膜的结构及形貌进行了表征,并考察了其吸附性能.结果表明:用PDA及c-CD功能化后,c-CD/PDA@SF复合纤维直径和表面粗糙度都有所增加,对亚甲基蓝的吸附能力提升,吸附过程符合伪二阶动力学模型.当亚甲基蓝溶液的pH值为9.0时,复合纤维膜对亚甲基蓝的最大移除率达96%.此外,随着循环使用次数增加,复合纤维膜的吸附能力下降,但对亚甲基蓝的移除率仍达80%以上.
Abstract
Polystyrene/polyvinylidene fluoride electrospun fibers(SF)were prepared via electrospinning technology.Then carboxylated cyclodextrin(c-CD)was bonded covalently to the surface of SF with the aid of polydopamine(PDA)coating to fabricate the functionalized c-CD/PDA@SF composite fibrous membrane.The structure and morphology of the fibrous membranes were characterized and their adsorption performance were investigated.The results show that the diameter and surface roughness of c-CD/PDA@SF composite fiber are increased after the modification of PDA and c-CD.Their adsorption capacity of methylene blue is enhanced,and the adsorption process conforms to the pseudo-second-order kinetic model.Their maximum removal of methylene blue reaches 96%when the pH value of the solution is 9.0.With the increase of the number of cycles,the adsorption capacity of the composite fibrous membranes decreases,but their removal rate of methylene blue could still reach above 80%.
基金项目
国家自然科学基金资助项目(21774016)
大学生创新创业训练计划项目(BIT2023LH144)
大学生创新创业训练计划项目(BIT2023LH098)
NETL
NSTL
万方数据