New binary ionic liquid system for the preparation of chitosan/cellulose composite fibers
New binary ionic liquid system for the preparation of chitosan/cellulose composite fibers
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DOI：
10.1016/j.carbpol.2011.12.020
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发表时间：
2012-03
影响因子：
11.2
通讯作者：
Bomou Ma;Meng Zhang;Chunju He;Junfen Sun
中科院分区：
文献类型：
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作者：
Bomou Ma;Meng Zhang;Chunju He;Junfen Sun
采用酸性离子液体甘氨酸盐酸盐（Gly·HCl）和中性离子液体氯化1-丁基-3-甲基咪唑（[Bmim]Cl）组成的二元体系作为壳聚糖和纤维素的共溶剂，一步制备壳聚糖/纤维素纺丝液。再生壳聚糖/纤维素复合纤维的质量分数为9.4%，采用干-湿纺丝法制备壳聚糖。SEM观察表明壳聚糖分散在复合纤维的表面和内部。WAXD分析表明，复合纤维的结晶度远小于原材料。元素分析结果表明，壳聚糖在纺丝过程中失重较小。此外，所制备的复合纤维具有良好的热稳定性（Tonsetis为305.1°C）和优异的力学性能（拉伸强度为4.63cN/dtex）。结果表明，Gly·HCl/[Bmim]Cl二元体系是制备壳聚糖/纤维素复合纤维的理想溶剂。
A binary system consisting of acidic ionic liquid glycine hydrochloride (Gly·HCl) and neutral ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) is proposed to be cosolvent for chitosan and cellulose, the spinning solution of chitosan/cellulose can be prepared in one step. The regenerated chitosan/cellulose composite fiber with 9.4wt.% chitosan was prepared through dry–wet spinning process. SEM shows that the chitosan is scattered on the surface and interior of the composite fiber. WAXD shows that the degree crystallization of the composite fibers is far less than that of raw materials. The result of elemental analysis (EA) indicates that there is little weight loss of chitosan during the spinning process. Moreover, the prepared composite fiber presents good thermal stability, i.e. its Tonsetis 305.1°C, and excellent mechanical property, i.e. its tensile strength is 4.63cN/dtex. All the results show that Gly·HCl/[Bmim]Cl binary system is a promising solvent for the preparation of chitosan/cellulose composite fiber.