近年来,随着不可再生资源的日益枯竭,合理开发利用可再生生物质资源日益受到重视。甲壳素作为含量仅次于纤维素的天然聚多糖材料,因其具有生物降解性、抗菌性、生物相容性等优点,被广泛应用于纺织、食品、组织工程等领域。采用碱/尿素水体系作为溶剂制得甲壳素溶液,探究温度、不同凝固浴配比对甲壳素膜力学性能的影响,得到最佳再生条件为低温、80%甲醇的凝固浴。在溶液中掺杂不同比例的纤维素粉后放入上述凝固浴再生得到一系列甲壳素/纤维素复合膜。结果表明:掺杂适量的纤维素粉可以提升膜的强度,CMC-3复合膜的力学强度可达95MPa。此外,该膜还具有良好的透光性、热稳定性、化学稳定性及良好的细胞相容性,因此该复合膜在食品包装和医疗材料等方面具有潜在的应用价值。
In recent years,with the increasing depletion of non-renewable resources,the rational development and utilization of renewable biomass resources has received growing attention.As a natural polysaccharide material,chitin has the second highest content,after cellulose,so that it has been widely used in textiles,food,tissue engineering and other fields because of its advantages of biodegradability,antibacterial properties,and biocompatibility.An alkali/urea water system was used as the solvent to prepare a chitin solution.The effects of temperature and different ratios of coagulating bath on the mechanical properties of the chitin membrane were explored,and the optimal regeneration conditions were a coagulation bath with low temperature and 80% methanol.A series of chitin/cellulose composite membranes were prepared by doping different proportions of cellulose powder in the solution and putting it into the coagulation bath.The results showed that the strength of the membranes could be improved by doping with a proper amount of cellulose powder,and the mechanical strength of the CMC-3 composite membrane could reach to 95MPa.In addition,the film had good light transmittance,thermal stability,chemical stability and cell compatibility,so the composite film had potential application value in food packaging and medical materials.
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基金资助
湖北省教育厅科学技术研究计划青年人才资助项目(204013);国家自然科学基金青年资助项目(22005226)
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