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首页> 外文期刊>International Journal of Biological Macromolecules: Structure, Function and Interactions >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
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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

机译：盐浓度对聚酰络络络合冷冻干燥制备的羧甲基纤维素/ N-2-羟丙基三甲基氯化铵氯化铵氯化铵纤维结构和性能的影响

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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.
机译：用于制备纤维的常规静电纺丝方法通常需要复杂的设备和复杂的制备方法，以及化学交联剂和有机溶剂，这限制了其在制备生物医学材料中的应用。在目前的研究中，通过聚电解质络合（PEC）在纯水和NaCl溶液中通过聚电解质络合（PEC）制造羧甲基纤维素/ N-2-羟丙基三甲基氯化铵（CMC / HACC）复合纤维。通过FTIR，固体C-13 NMR，XRD，XPS和SEM研究了制备的纤维的结构和NaCl浓度对纤维结构的影响。复合纤维和上结构和复合纤维的性能NaCl浓度的影响的形成机理进行了模拟在Materials Studio软件和讨论。研究了复合纤维的溶胀性能和热分解动力学。结果表明，向络合系统中添加NaCl电解质显着影响PEC纤维的结构和性质。我们的作品提供了通过使用NaA与所需浓度为电解质的NEA的PEC和冷冻干燥技术的可控结构和性质的天然聚合物的复合纤维的新制备途径。 （c）2019 Elsevier B.v.保留所有权利。

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