食品科学

• 工艺技术 • 上一篇    下一篇

4 种改性方式对明胶膜性能的影响

王丽媛1,侯梦奇2,李 晓1,李红艳1,刘天红1,王 颖1,*   

  1. 1.山东省海洋生物研究院,山东 青岛 266002;2.山东农业大学食品科学与工程学院,山东 泰安 271018
  • 出版日期:2015-03-25 发布日期:2015-03-17
  • 通讯作者: 王 颖
  • 基金资助:

    国家海洋局公益性行业科研专项(201205027);山东省现代农业产业技术体系虾蟹类创新团队项目(SDAIT-15)

Effects of Four Modification Methods on Properties of Gelatin-Chitosan Edible Film

WANG Liyuan1, HOU Mengqi2, LI Xiao1, LI Hongyan1, LIU Tianhong1, WANG Ying1,*   

  1. 1. Marine Biology Institute of Shandong Province, Qingdao 266002, China;
    2. College of Food Science and Engineering, Shandong Agricultural University, Taian 271018, China
  • Online:2015-03-25 Published:2015-03-17
  • Contact: WANG Ying

摘要:

研究了共混改性、增塑改性、交联改性和乳化改性对明胶膜性能的影响。结果表明,明胶分别与壳聚糖、海藻酸钠共混溶解性较好,成膜均匀透明,同时具有较低的水蒸气透过率和透氧率,阻隔性增强;添加甘油作为增塑剂可提高明胶膜的断裂伸长率,机械性能增强;与柠檬酸钠交联改性后降低了明胶膜的水蒸气透过率,增强阻隔性能,提高抗拉强度,增强力学性能,但是膜的透光率下降;添加质量分数为0.1%的乳化剂吐温-80可以降低可食膜的水蒸气透过率,增强膜的阻隔性能,同时增大抗拉强度,改善机械性能。研究认为,共混、增塑、交联、乳化4 种改性方式均能不同程度地影响明胶膜的阻隔性能和机械性能,改善明胶膜的综合性能以满足其在不同领域的应用。

关键词: 明胶, 改性, 可食膜, 壳聚糖

Abstract:

The influences of blending, plasticized, crosslinking and emulsifying modifications on the properties of gelatin
film were systematically studied in this research. The results showed that gelatin blended with chitosan and sodium alginate
respectively had a better solubility with the film uniform and transparent and an enhanced barrier with low water vapor
permeability and oxygen permeability. Glycerol as a plasticizer improved elongation and tensile strength of the gelatin film
which enhanced mechanical properties. Sodium citrate crosslinking modification on gelatin film decreased the water vapor
permeability, which enhanced barrier properties and improved the mechanical strength with tensile strength enhanced, but
the light transmittance of the film decreased. The emulsifier Tween-80 added at a concentration of 0.1% reduced water vapor
permeability and enhanced the barrier property of the film, at the same time, increased the tensile strength and improved
mechanical properties. This study suggested that blending, plasticized, crosslinking and emulsifying effectively affect
the barrier properties and mechanical properties, improve the comprehensive properties of gelatin film to satisfy the different
application areas.

Key words: gelatin, modification, edible film, chitosan

中图分类号: