为了改善单纯壳聚糖机械性能较差的缺陷,采用海藻酸钠为复合膜材料,以柠檬酸(CA)作为交联剂,甘油作为增塑剂,通过溶液浇铸法制备了壳聚糖/海藻酸钠/柠檬酸复合凝胶膜,并详细研究了柠檬酸添加量的多少对壳聚糖/海藻酸钠复合凝胶膜的厚度、机械性能、红外光谱、X射线衍射、表面润湿性和不透明度等影响。结果表明:随着CA含量的增加,CS/SA-CA复合凝胶膜的交联程度增强,CS/SA-10% CA复合凝胶膜显示出最高的TS值(685.2kPa)和EB值(105.36%),使其在食品包装领域具有一定的潜在应用价值。
In order to improve the defects of poor mechanical properties of pure chitosan,chitosan/sodium alginate/citric acid composite gel membranes were prepared by solution casting method using sodium alginate as composite membrane material,citric acid (CA) as crosslinking agent and glycerol as plasticizer.The effects of citric acid addition on the thickness,mechanical properties,infrared spectroscopy,X-ray diffraction,surface wettability and opacity of chitosan/sodium alginate composite gel membranes were studied in detail.The results showed that with the increase of CA content,the crosslinking degree of CS/SA-CA composite gel membrane increased.CS/SA-10% CA composite gel membrane exhibited the highest TS value (685.2kPa) and EB value (105.36%),which made it have certain potential application value in the field of food packaging.
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基金资助
中央高校基本科研业务费项目(31920240115、31920240084和31920190079)
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