| 摘要: |
| 目的 制备一种具有疏水功能的壳聚糖-明胶活性膜。方法 通过研究不同质量浓度比的明胶-壳聚糖对膜性能的影响，确定两者的最佳质量浓度比，并研究柠檬酸三丁酯、甘油、吐温-20浓度对活性膜疏水性能的影响。根据Box-Benhnken试验设计原理，以膜的抗拉强度作为响应值，对活性疏水膜的制备工艺进行优化。探讨各因素交互作用，确定制备壳聚糖-明胶活性疏水膜的最佳条件。结果 明胶-壳聚糖的最佳质量浓度比为1∶1，各因素对膜抗拉强度的显著性影响依次是柠檬酸三丁酯>甘油>吐温-20。经过验证，制备活性膜时，柠檬酸三丁酯、甘油、吐温-20的最佳质量浓度分别为0.9，0.3，0.1 g/mL，该条件下膜的抗拉强度为20.9 MPa，断裂伸长率为41.34%。结论 该工艺条件下所制备的活性膜感官性能、物理性能和疏水性能均良好。 |
| 关键词: 壳聚糖 明胶 活性膜 抗拉强度 响应面 |
| DOI：10.19554/j.cnki.1001-3563.2018.09.005 |
| 分类号:TB484.9 |
| 基金项目:北京市农林科学院青年基金（QNJJ201709）；北京市农林科学院科技创新能力建设专项（KJCX20170206） |
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| Optimization and Preparation of Chitosan/gelatin-based Active Films in Response Surface Methodology |
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BAI Xu1,2, WANG Yu3, WANG Bao-gang1,4, LI Wen-sheng5, YANG Tian-tian5
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1.Beijing Academy of Forestry and Pomology Sciences, Beijing 100093, China;2.Shanxi Agricultural University, Jinzhong 030801, China;3.Shanxi Agricultural University, Jinzhong 030801, China;4.2.National R&D Center for Fruit Processing, Beijing 100093, China;5.Beijing Academy of Forestry and Pomology Sciences, Beijing 100093, China
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| Abstract: |
| The work aims to prepare chitosan/gelatin active films with hydrophobic function. The effects of gelatin-chitosan with different mass concentrations ratios on the film properties were studied to determine the best mass concentrations ratio of the two. The effect of tributyl citrate, glycerol and Tween-20 concentration on the hydrophobic properties of the active films was also studied. The preparation technology of active hydrophobic films was optimized based on the design principle of Box-Benhnken test, with tensile strength of the film as the response value. The interaction of various factors was explored to determine the optimum conditions for the preparation of chitosan-gelatin active films. The best mass concentrations ratio of gelatin/chitosan was 1∶1. The significant effect of three factors on tensile strength of films successively followed by tributyl citrate > glycerol > Tween-20. After verification, during the preparation of active films, the best mass concentrations of tributyl citrate, glycerol and Tween-20 were respectively 0.9, 0.3 and 0.1g/mL. Under this condition, the tensile strength of film was 20.9 MPa, and the elongation at break was 41.34%. The sensory, physical and hydrophobic properties of the active films prepared under this process are favorable. |
| Key words: chitosan gelatin active films tensile strength response surface methodology |
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