文献类型：期刊文献

英文题名：Constructing biodegradable nanochitin-contained chitosan hydrogel beads for fast and efficient removal of Cu(II) from aqueous solution

作者：Wu, Jianming[1];Cheng, Xi[3];Li, Yulin[2,5,6];Yang, Guisheng[1,3,4]

机构：[1]Hefei Univ Technol, Coll Chem & Chem Engn, Hefei 230009, Anhui, Peoples R China;[2]Hubei Univ, Coll Chem & Chem Engn, Wuhan 430062, Hubei, Peoples R China;[3]Zhejiang Univ, Dept Polymer Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China;[4]Shanghai Genius Adv Mat Co Ltd, Shanghai 201109, Peoples R China;[5]East China Univ Sci & Technol, Minist Educ, Engn Res Ctr Biomed Mat, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[6]East China Univ Sci & Technol, Minist Educ, Engn Res Ctr Biomed Mat, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China

年份：2019

卷号：211

起止页码：152

外文期刊名：CARBOHYDRATE POLYMERS

收录：;EI(收录号：20190606483653);WOS:【SCI-EXPANDED(收录号:WOS:000459866600018)】；

基金：This study was financially supported by the National Key Research and Development Program (2017YFB0309300; 2016YFB0301900), Shanghai Municipal "Hong Kong, Macao and Taiwan" Cooperation Program of Science and Technology (18490761100). The National Natural Science Foundation of China (81772317) and the Shanghai Minhang District Science and Technology Project (2016MH181) were also acknowledged.

语种：英文

外文关键词：Hydrogel beads; Nanochitin; Adsorption; Cu(II) ion; Magnetic separation

摘要：In this study, Fe3O4-nanoparticles-contained polyamide 6 (PA 6) microparticles (FP) were developed by a first dispersion of Fe3O4-nanoparticles in e-caprolactam (CL) monomer in the presence of polystyrene (PS) and a subsequent in situ CL open polymerization into PA 6, followed by PS removal. The FP microparticles (as magnetic separation material) and nanochitin (n-CT, as an effective metal-cation natural adsorbent) were then in situ encapsulated into poly(vinyl alcohol)-enhanced chitosan hybrids (PVA/CTS) to form biodegradable nanocomposite hydrogels (FPCC) with magnetic separation ability. The FPCC hybridized hydrogels enabled about 1.7-fold Cu(II) adsorption capacity as compared to the pure PVA/CTS hydrogels with a Cu(II) adsorption value of 38.7 mg/g. More attractively, the adsorption equilibrium could be achieved within 10 min, which is quicker than many previous adsorbents. Furthermore, simulation results indicated that Cu(II) adsorption behaviors of the hybrid hydrogels conform to a pseudo-second-order kinetic model and a Langmuir isotherm model.