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| 壳聚糖/聚乙烯亚胺改性大豆蛋白膜的 制备与性能 |
| Preparation and properties of chitosan/polyethyleneimine modified soybean protein membrane |
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| DOI： |
| 中文关键词: 改性壳聚糖 大豆蛋白膜 表面疏水性 力学性能 |
| 英文关键词:modified chitosan soybean protein membrane surface hydrophobicity mechanical property |
| 基金项目:2019年国家级大学生创新创业训练计划项目（G201910022055）；国家自然科学基金资助项目(21703009) |
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| 中文摘要: |
| 采用环氧氯丙烷和聚乙烯亚胺对壳聚糖进行改性得到改性壳聚糖，并利用聚乙烯亚胺、壳聚糖和改性壳聚糖分别对大豆分离蛋白进行改性处理，共混浇铸制备大豆蛋白膜材料。探讨了不同改性处理对大豆蛋白膜微观结构、疏水性能、力学性能以及热稳定性的影响。结果表明：采用改性壳聚糖处理得到的大豆蛋白膜的结晶度增加，表面疏水性增强，力学性能提高，热稳定性提升。当改性壳聚糖添加量为5%（以大豆分离蛋白质量计）时，整体改性效果最优，此时大豆蛋白膜的表面疏水性增强了23.32%，力学强度提高了36.27%。 |
| 英文摘要: |
| Chitosan was modified by epichlorohydrin and polyethyleneimine(PEI). The soybean protein isolate was modified by PEI, chitosan and modified chitosan, and then was used to prepare the soybean protein membrane material by blending and casting. The effects of modification treatments on the microstructure, hydrophobicity, mechanical properties and thermal stability of soybean protein membrane material were investigated. The results showed that the crystallinity, surface hydrophobicity, mechanical properties and thermal stability of the soybean protein membrane modified with modified chitosan increased. When the dosage of modified chitosan was 5% of the soybean protein isolate mass, the overall modification effect was the best. At this time, the surface hydrophobicity of soybean protein membrane improved by 23.32%, and the mechanical strength increased by 36.27%. |
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