摘要
以丙烯酸(AA)为单体,过氧化苯甲酰(BPO)为引发剂,通过原位聚合法,在氧化石墨烯(GO)表面包覆聚丙烯酸(PAA),得到GO-PAA纳米复合物.将GO-PAA纳米复合物分散在聚丙烯腈(PAN)基体中,利用静电纺丝技术得到PAN/GO-PAA静电纺纳米复合纤维膜.利用化学接枝反应在PAN/GO-PAA静电纺纳米复合纤维膜表面接枝超支化聚乙烯亚胺(HPEI),构筑HPEI-g-PAN/GO-PAA静电纺纳米复合纤维膜.研究了HPEI-g-PAN/GO-PAA静电纺纳米复合纤维膜对Au(Ⅲ)的吸附性能.结果表明:HPEI-g-PAN/GO-PAA静电纺纳米复合纤维膜对Au(Ⅲ)的最大吸附量为1 808.60 mg·g^(-1),在吸附过程中,部分Au(Ⅲ)被还原为片状和不规则颗粒状的Au单质.在共存离子体系中,HPEI-g-PAN/GO-PAA对Au(Ⅲ)具有较好的吸附选择性.
Using acrylic acid(AA) as monomer and benzoyl peroxide(BPO) as initiator, polyacrylic acid(PAA) was coated on the surface of graphene oxide(GO) by in-situ polymerization to obtain GO-PAA nanocomposites. The GO-PAA nanocomposites were dispersed in polyacrylonitrile(PAN) matrix, and PAN/GO-PAA electrospun nanocomposite fibrous membranes were obtained by electrospinning technology. HPEI-g-PAN/GO-PAA electrospun nanocomposite fibrous membranes were fabricated by grafting hyperbranched polyethyleneimine(HPEI) on the surface of PAN/GO-PAA electrospun nanocomposite fibrous membranes with chemical grafting reaction. The adsorption performance of HPEI-g-PAN/GO-PAA electrospun nanocomposite fibrous membranes for Au(Ⅲ) was studied by batch experiments. The results showed that the maximum adsorption capacity of HPEI-g-PAN/GO-PAA electrospun nanocomposite fibrous membranes for Au(Ⅲ) was 1 808.60 mg·g^(-1). During the adsorption process, partial Au(Ⅲ) was reduced to flake and irregularly granular Au elemental. HPEI-g-PAN/GO-PAA electrospun nanocomposite fibrous membranes had good adsorption selectivity for Au(Ⅲ) in the coexisting ionic system.
作者
李晓华
马应霞
杨海军
孟文丽
钟小妹
LI Xiao-hua;MA Ying-xia;YANG Hai-jun;MENG Wen-li;ZHONG Xiao-mei(School of Materials Science and Engineering,Lanzhou Univ.of Tech.,Lanzhou 730050,China;State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou Univ.of Tech.,Lanzhou 730050,China)
出处
《兰州理工大学学报》
CAS
北大核心
2022年第6期16-27,共12页
Journal of Lanzhou University of Technology
关键词
超支化聚乙烯亚胺
聚丙烯腈
静电纺纳米复合纤维膜
吸附
Au(Ⅲ)
hyperbranched polyethyleneimine
polyacrylonitrile
electrospun nanocomposite fibrous membranes
adsorption
Au(Ⅲ)
