Food and Fermentation Industries >

2023 , Vol. 49 >Issue 13: 191 - 199

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.032957

Preparation and properties of thyme essential oil/phosphorylated starch crystal/gelatin composite film

  • WANG Yao ,
  • CHEN Ping ,
  • WANG Pengkai ,
  • HONG Pengzhi
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  • 1(College of Food Science and Technology, Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Provincial Engineering Technology Research Center of Marine Food,Guangdong Modern Agricultural Science and Technology Innovation Center, Zhanjiang 524088, China)
    2(Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, China)

Received date: 2022-07-13

  Revised date: 2022-08-02

  Online published: 2023-08-07

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Abstract

The hydrophobicity and mechanical property of gelatin films were improved by the addition of phosphorylated starch crystals using gelatin as a raw material. The effect of thyme essential oil at different mass fractions (4%, 6%, and 8%, relative to the total mass of the dry base) on the structural and functional properties of gelatin/phosphorylated starch crystals was investigated. The results of the Fourier transform infrared spectrum showed that molecular interaction of the composite film within the components of gelatin/phosphorylated starch crystal/thyme essential oil were non-covalent linkages, containing hydrogen bonds, hydrophobic interactions, and electrostatic interactions. The scanning electron microscopy revealed that the surface of the composite film became rough after adding thyme essential oil. The results of the contact angle indicated that the surface hydrophobicity of the composite film decreased with the amount of thyme essential oil added. Compared with gelatin and gelatin/phosphorylated starch crystal films, adding 4% thyme essential oil, composite films showed excellent hydrophobicity and antibacterial and antioxidant activities. As the thyme essential oil mass fraction increased to 8%, composite films performed strong antibacterial and antioxidant activities and also had strong UV shielding performance. In addition, dynamic migration experiments showed the effective controlled release formed by composite films in a water environment. Therefore, the theoretical basis for the development of multifunctional food preservation films can be established by adjusting the content of thyme essential oil.

Key words： phosphorylated starch crystal; gelatin; thyme essential oil; composite film

Cite this article

WANG Yao , CHEN Ping , WANG Pengkai , HONG Pengzhi . Preparation and properties of thyme essential oil/phosphorylated starch crystal/gelatin composite film[J]. Food and Fermentation Industries, 2023 , 49(13) : 191 -199 . DOI: 10.13995/j.cnki.11-1802/ts.032957

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