兰州理工大学学报 ›› 2022, Vol. 48 ›› Issue (6): 16-27.

• 材料科学与工程 • 上一篇    下一篇

HPEI接枝改性PAN/GO-PAA静电纺纳米复合纤维膜对Au(Ⅲ)的吸附

李晓华1,2, 马应霞*1,2, 杨海军1,2, 孟文丽1,2, 钟小妹1,2   

  1. 1.兰州理工大学 材料科学与工程学院, 甘肃 兰州 730050;
    2.兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室, 甘肃 兰州 730050
  • 收稿日期:2022-04-26 出版日期:2022-12-28 发布日期:2023-03-21
  • 通讯作者: 马应霞(1974-),女,甘肃白银人,博士,教授.Email:mayx2011818@163.com

HPEI graft modification PAN/GO-PAA electrospun nanocomposite fibrous membranes for adsorption of Au(Ⅲ)

LI Xiao-hua1,2, MA Ying-xia1,2, YANG Hai-jun1,2, MENG Wen-li1,2, ZHONG Xiao-mei 1,2   

  1. 1. School of Materials Science and Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China;
    2. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou Univ. of Tech., Lanzhou 730050, China
  • Received:2022-04-26 Online:2022-12-28 Published:2023-03-21

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.

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)

Abstract: 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.

Key words: hyperbranched polyethyleneimine, polyacrylonitrile, electrospun nanocomposite fibrous membranes, adsorption, Au(Ⅲ)

中图分类号: