食品科学 ›› 2019, Vol. 40 ›› Issue (18): 302-311.doi: 10.7506/spkx1002-6630-20180929-328

• 工艺技术 • 上一篇    下一篇

超声波制备纳米SiO2-马铃薯淀粉复合膜性能优化及结构表征

张荣飞,王相友,程萌   

  1. (山东理工大学农业工程与食品科学学院,山东?淄博 255000)
  • 出版日期:2019-09-25 发布日期:2019-09-23
  • 基金资助:
    国家自然科学基金面上项目(31972144);国家自然科学基金青年科学基金项目(31301570); 山东省农业重大应用技术创新课题(鲁财农字[2014]38号)

Optimization of Ultrasonic-Assisted Preparation and Structural Characterization of Potato Starch Nanocomposite Films

ZHANG Rongfei, WANG Xiangyou, CHENG Meng   

  1. (School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China)
  • Online:2019-09-25 Published:2019-09-23

摘要: 为提高纳米SiO2在马铃薯淀粉膜中的分散性以增强纳米复合膜的包装保鲜性能,通过2?次超声波处理制备纳米SiO2-马铃薯淀粉复合膜,以马铃薯淀粉用量、甘油用量、纳米SiO2用量为考察因素,对纳米复合膜的性能进行正交试验优化,对其进行微观结构表征,以及对采后双孢蘑菇进行包装保鲜实验。结果表明,超声波使纳米SiO2较均匀地分散在马铃薯淀粉膜中,且适合超声波合成纳米复合膜的最佳膜液配比为马铃薯淀粉用量3.5?g/100?mL、甘油用量3?g/100?mL、纳米SiO2?用量0.3?g/100?mL。X-射线衍射光谱与傅里叶变换红外光谱分析证实超声波合成法使纳米SiO2与马铃薯淀粉分子间形成较强的氢键;紫外光谱分析表明超声波合成的纳米复合膜具有较好的抗紫外光作用。此外,超声波合成的纳米复合膜包装保鲜性能得到增强,其透水率、透氧率、水溶性较普通合成的纳米复合膜分别降低了30.22%、71.16%、39.61%,拉伸强度提高了17.82%,可较好地控制双孢蘑菇贮藏过程中活性氧的代谢,延长其货架期。

关键词: 超声波, 纳米SiO2-马铃薯淀粉复合膜, 分散性

Abstract: In order to improve the dispersibility of nano-SiO2 in potato starch films and consequently to enhance the packaging and preservation properties, potato starch nanocomposite films were prepared by two cycles of ultrasonication. The optimization of the concentrations of nano-SiO2, potato starch and glycerin was conducted using the orthogonal array method. The prepared films were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and ultraviolet-visible (UV-vis) spectroscopy. The effect of packaging with the films on reactive oxygen metabolism in the white button mushroom Agaricus bisporus during storage at (4 ± 1) ℃ was determined. The results showed that ultrasonication resulted in uniform dispersion of nano-SiO2 in the films. The films with exhibited the optimal properties at a potato starch concentration of 3.5 g/100 mL, a glycerin concentration of 3 g/100 mL and a nano-SiO2 concentration of 0.3 g/100 mL. The XRD and FTIR analyses confirmed that the ultrasonic in-situ synthesis method could result in the formation of strong hydrogen bonding between nano-SiO2 and starch molecules. The composite films had outstanding anti-UV property. The properties of films were enhanced by ultrasonic in-situ synthesis compared to the routine method, as indicated by a reduction in water vapor transmission rate, oxygen permeability and water solubility of 30.22%, 71.16% and 39.61%, respectively, and an increase in tensile strength of 17.82%. The films prepared in this study could control reactive oxygen metabolism, thereby extending the shelf-life of Agaricus bisporus.

Key words: ultrasonic, potato starch nanocomposite films, dispersity

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