文献类型：期刊文献

英文题名：Elastic, super-hydrophobic and biodegradable chitosan sponges fabricated for oil/water separation

作者：Liang, Fengyan[1,2,3];Hou, Tingting[1];Li, Sidong[1,3];Liao, Lusheng[2];Li, Puwang[3];Li, Chengpeng[1]

机构：[1]Guangdong Ocean Univ, Sch Chem & Environm Sci, Zhanjiang 524088, Peoples R China;[2]Chinese Acad Trop Agr Sci, Guangdong Prov Key Lab Nat Rubber Proc, Agr Prod Proc Res Inst, Zhanjiang 524001, Peoples R China;[3]Chinese Acad Trop Agr Sci, Agr Prod Proc Res Inst, Zhanjiang 524001, Peoples R China

年份：2021

卷号：9

期号：5

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:000704405900003)、、EI(收录号：20213010666671)、Scopus(收录号：2-s2.0-85110472367)、WOS

基金：This work was financially supported by Natural Science Foundation of Guangdong Province (No. 2020A1515011011) & Foundation of Guangdong Provincial Key Laboratory of Natural Rubber Processing, P. R. China.

语种：英文

外文关键词：Chitosan; Elasticity; Super-hydrophobicity; Biodegradability; Oil/water separation

外文摘要：Due to easy availability and biodegradability, chitosan (CS)-based porous adsorbents have attracted significant interest in oil-spill and organic solvent removal. Herein, a multi-network CS-based sponge was fabricated via ion and hydrogen bond cross-linking using lemon, followed by covalent cross-linking via heptanal, in-situ loading of Fe3O4-polydopamine (PDA) particles and polylactic acid (PLA) coating. The as-fabricated sponge was system-atically characterized by Fourier transform-infrared spectrometry (FT-IR), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), transmission electron microscope (TEM), static water contact angles (WCA) and so on. The as-fabricated CS-based sponge exhibits excellent elasticity, which could be compressed to large strains (80%) at a relatively high stress (0.685 MPa). The WCA of the targeted sponge can reach to 152.2 +/- 1.2o after multiple surface func-tionalization. In addition, the degradation rate of the as-fabricated sponge can still reach 45.01 +/- 1.11% within 15 days. Particularly, the sponge could selectively adsorb oil/organic solvent with up to 50 times of its own weight, and effectively separate the surfactant-stabilized oil-in-water emulsion with a flux of 8753 +/- 423.56 L m(-2) h(-1). Last but not least, the sponge can be driven and recycled magnetically. In conclusion, this promising multifunctional sponge can be applied as a new absorbent for oil-water separation.