Publication: Improvement of mechanical and heat-sealing properties of edible chitosan films via addition of gelatin and CO <inf>2</inf> treatment of film-forming solutions
3
Issued Date
2019-06-15
Resource Type
ISSN
18790003
01418130
01418130
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2-s2.0-85063064710
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Mahidol University
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SCOPUS
Bibliographic Citation
International Journal of Biological Macromolecules. Vol.131, (2019), 589-600
Suggested Citation
Sarinya Prateepchanachai, Wasina Thakhiew, Sakamon Devahastin, Somchart Soponronnarit Improvement of mechanical and heat-sealing properties of edible chitosan films via addition of gelatin and CO <inf>2</inf> treatment of film-forming solutions. International Journal of Biological Macromolecules. Vol.131, (2019), 589-600. doi:10.1016/j.ijbiomac.2019.03.067 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/50149
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Title
Improvement of mechanical and heat-sealing properties of edible chitosan films via addition of gelatin and CO <inf>2</inf> treatment of film-forming solutions
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Abstract
© 2019 Elsevier B.V. Glycerol, gelatin and CO 2 were used to prepare chitosan-based packaging films with improved mechanical properties and seal strength. Nuclear magnetic resonance spectroscopy, X-ray diffraction analysis, Fourier transform infrared spectroscopy and dynamic mechanical analysis were conducted; the results were used to explain the mechanical and sealing properties data. Film color was also measured. Combined addition of glycerol and use of CO 2 to treat the film-forming solution led to decreased film crystallinity and glass transition temperature, resulting in improved film mechanical properties. Addition of glycerol and gelatin resulted in enhanced molecular interactions between chitosan-gelatin and improved sealability of the films. Films with the best mechanical and sealing properties were obtained from a solution with 25% (w/w) glycerol and treated with CO 2 and from that with 25% (w/w) glycerol and 10% (w/v) gelatin, respectively. Films with addition of both glycerol and gelatin exhibited lower lightness, but higher yellowness than the commercial stretch film.