Food and Fermentation Industries >

2023 , Vol. 49 >Issue 22: 258 - 265

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.033094

Preparation and properties of oxidized konjac glucomannan-chitosan composite films

  • TIAN Wenke ,
  • QIN Xiaoli ,
  • XIE Yong ,
  • CHEN Zhaojun ,
  • LONG Mingxiu ,
  • ZHANG Shenglin ,
  • JIANG Xuekuan ,
  • LIU Xiong
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  • 1(College of Food Science, Southwest University, Chongqing 400715, China)
    2(College of Material and Chemical Engineering, Tongren University, Tongren 554300, China)
    3(Institute of Konjac Research, Southwest University, Chongqing 400715, China)
    4(Chongqing Sino Konjac Biological Technology Co.Ltd., Chongqing 400715, China)

Received date: 2022-07-25

  Revised date: 2022-09-06

  Online published: 2023-12-25

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Abstract

Oxidized konjac glucomannan (OKGM) hydrosols were prepared by microwave-assisted ozone oxidative degradation and mixed with chitosan (CS) to produce composite films. The effects of konjac glucomannan (KGM) and OKGMs with different degradation times (30, 60, 90, 120 min) on the mechanical, moisture barrier and swelling properties and microstructure of composite films were investigated. Results showed that the film-forming solutions formed by OKGMs and CS were more fluid than those formed by KGM, and the addition of both KGM and OKGMs could significantly improve the mechanical properties of CS film. KGM and OKGM-30 could reduce the water vapor permeability of CS film. OKGM-30 and OKGM-60 were able to improve the appearance of CS film, and OKGM-90 and OKGM-120 significantly reduced the water absorption swelling of CS film. The scanning electron micrograph showed that both KGM and OKGMs had good compatibility with CS and could form a tight network structure. In conclusion, the CS/OKGM composite films have better overall performance than CS film and have better performance than the CS/KGM film in terms of flowability, film color, and swelling properties. Different degradation times of OKGM have different effects on the physicochemical properties of CS film, and the required CS/OKGM composite films can be selected according to the actual application. The results provide a theoretical reference for the application of OKGMs in the field of degradable packaging films.

Key words： oxidized konjac glucomannan; chitosan; composite films; physical property; microstructure

Cite this article

TIAN Wenke , QIN Xiaoli , XIE Yong , CHEN Zhaojun , LONG Mingxiu , ZHANG Shenglin , JIANG Xuekuan , LIU Xiong . Preparation and properties of oxidized konjac glucomannan-chitosan composite films[J]. Food and Fermentation Industries, 2023 , 49(22) : 258 -265 . DOI: 10.13995/j.cnki.11-1802/ts.033094

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