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中国精品科技期刊2020
李金星,沈春红,黎先发. 改性壳聚糖复合膜的制备及优化[J]. 食品工业科技,2021,42(8):144−151. doi: 10.13386/j.issn1002-0306.2020060067.
引用本文: 李金星,沈春红,黎先发. 改性壳聚糖复合膜的制备及优化[J]. 食品工业科技,2021,42(8):144−151. doi: 10.13386/j.issn1002-0306.2020060067.
LI Jinxing, SHEN Chunhong, LI Xianfa. Preparation and Optimization of Modified Chitosan Composite Film[J]. Science and Technology of Food Industry, 2021, 42(8): 144−151. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2020060067.
Citation: LI Jinxing, SHEN Chunhong, LI Xianfa. Preparation and Optimization of Modified Chitosan Composite Film[J]. Science and Technology of Food Industry, 2021, 42(8): 144−151. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2020060067.

改性壳聚糖复合膜的制备及优化

Preparation and Optimization of Modified Chitosan Composite Film

  • 摘要: 以壳聚糖为原料经改性制备的巯基化壳聚糖为成膜基质,再添加结冷胶、甘油、氯化钙和纳他霉素,通过流延成膜制备复合膜。以膜的拉伸强度、断裂伸长率、水蒸汽透过率以及透光率为考查指标,对结冷胶、甘油、氯化钙和纳他霉素进行单因素实验,然后通过Plackett-Burman(PB)试验和最陡爬坡试验确定对膜拉伸强度影响显著的因素以及最佳试验范围。最后以拉伸强度为评价指标进行响应面试验,得出二次响应预测模型,优化出了复合膜的最佳配比。结果表明:单一壳聚糖膜拉伸强度为0.928 MPa,但断裂伸长率仅为5.91%;单一巯基化壳聚糖膜拉伸强度仅为0.350 MPa,断裂伸长率为14.47%。当基础膜液中巯基化壳聚糖0.20 g,改性条件为结冷胶0.18 g,甘油1.00 g,氯化钙0.17 g,纳他霉素0.01 g时,复合膜的拉伸强度最大,达到4.986±0.087 MPa;改性壳聚糖复合膜的拉伸强度得到显著提高(P<0.05)。本研究结果为改性壳聚糖复合膜的制备、复合膜综合性能提高以及在食品保鲜领域的应用提供理论支撑。

     

    Abstract: In this work, the thiolated chitosan was prepared by modification of chitosan. The composite film was prepared with thiolated chitosan as the film-forming matrix, adding gellan gum, glycerin, calcium chloride and natamycin as modifier. Based on the tensile strength, elongation at break, water vapor transmittance and transmittance of the film, the optimum addition amount of these four substances were determined by single factor experiments. By the Plackett-Burman experiment and the steepest climb experiment, the factors that had significant influence on the tensile strength of the film and the optimal experiment range were determined. Finally, the response surface experiment was carried out, and the tensile strength was taken as the evaluation index. The secondary response prediction model was obtained, and the optimal ratio of composite film was optimized. The results showed that the tensile strength of the single chitosan film was 0.928 MPa, but the elongation at break was only 5.91%. The tensile strength of the single thiolated chitosan film was only 0.350 MPa, and the elongation at break was 14.47%. When the basic film solution contained 0.20g of thiolated chitosan, the modified conditions were 0.18 g gellan gum, 1.00 g glycerol, 0.17 g calcium chloride and 0.01 g natamycin, the tensile strength of the composite film reached the maximum of 4.986±0.087 MPa. Under these, the tensile strength at break of the modified chitosan composite film was obviously (P<0.05) improved. The results of this study would provide theoretical support for the preparation of modified chitosan composite film, the improvement of composite properties and its application in the field of food preservation.

     

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