文献类型：期刊文献

英文题名：Effects of salt concentration on the structure and properties of composite fiber of carboxymethyl cellulose/N-2-hydroxylpropyl trimethyl ammonium chloride chitosan prepared by polyelectoyte complexation-freeze drying

作者：Chen, Yu[1];Liu, Yang[1];Xing, Tao[1,2];Sun, Boyang[1,3];Feng, Zhipan[1];Li, Puwang[4];Yang, Ziming[4];Li, Sidong[5];Chen, Shusen[1]

机构：[1]Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China;[2]Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100190, Peoples R China;[3]Shanghai Jiao Tong Univ, Dept Polymer Sci & Engn, Shanghai Key Lab Elect Insulat & Thermal Ageing, Shanghai 200240, Peoples R China;[4]Chinese Acad Trop Agr Sci, Agr Prod Proc Res Inst, Zhanjiang 524001, Peoples R China;[5]Guangdong Ocean Univ, Sch Chem & Environm Sci, Zhanjiang 524001, Peoples R China

年份：2020

卷号：151

起止页码：1030

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：SCI-EXPANDED(收录号：WOS:000528267400104)、、EI(收录号：20242716643878)、Scopus(收录号：2-s2.0-85083464642)、WOS

语种：英文

外文关键词：Quaternary ammonium salt of chitosan; Carboxymethyl cellulose; Polyelectrolyte complex; Freeze drying; Fibers; Salt

外文摘要：The conventional electrospinning process for the preparation of fibers usually require complex equipment and complicated preparation processes, as well as chemical crosslinkers and organic solvents, which limits its application in the preparation of biomedical materials. In the current study, carboxymethyl cellulose/N-2-hydroxylpropyl trimethyl ammonium chloride chitosan (CMC/HACC) composite fibers were fabricated by polyelectrolyte complexation (PEC) and freeze drying coupled method in both pure water and NaCl solution. The structures of the as-prepared fibers and the effects of NaCl concentration on the structures of fibers were studied by FTIR, solid C-13 NMR, XRD, XPS and SEM. The formation mechanism of the composite fiber and the effects of NaCl concentration on structure and properties of the composite fiber were simulated in the Materials Studio software and discussed. The swelling properties and the thermal decomposition kinetics of the composite fiber were studied. The results suggest that the addition of NaCl electrolyte to the complexing system significantly affects the structure and properties of the PEC fiber. Our work has provided a new preparation route to the composite fibers of natural polymers with controllable structures and properties by the combination of PEC and freeze drying techniques using Naa with desired concentration as the electrolyte. (C) 2019 Elsevier B.V. All rights reserved.