Study on barrier and flame⁃retardant performance of chitosan/poly（vinyl alcohol）/gelatin composite films

doi:10.19491/j.issn.1001-9278.2024.05.006

Abstract

Abstract:

Chitosan （CS） was mixed uniformly with poly（vinyl alcohol）（PVA） and gelatin （GEL） at different mass ratios， and the resulting solution was dumped onto a plexiglass plate by using a solution⁃casting method to obtain a series of CS/PVA/GEL blend films. The structure of the blend films was characterized by infrared spectrogram analysis， ultraviolet spectrum analysis， water contact angle， and so on. Their thermal stability， flame retardancy， oxygen permeability， preservation， mechanical properties were investigated. The results indicated that the blend films exhibited the best comprehensive performance at a CS/PVA/GEL mass ratio of 10/3/7.

Key words: barrier effect, flame retardant, film, chitosan

CLC Number:

TQ322.2

KONG Dejin, LIAO Xu, LI Nanxi, LEI Jingyi, LIU Kuo, LI Hongfei, TANG Wufei. Study on barrier and flame⁃retardant performance of chitosan/poly（vinyl alcohol）/gelatin composite films[J]. China Plastics, 2024, 38(5): 28-32.

Figures/Tables 10

Fig.1. FTIR spectra of CS， GEL， PVA and S2 composite films

Fig.2. FTIR spectra of CS based composite films

Fig.3. UV spectra and photos of the CS based composite films

Fig.4. Contact angle of the CS based composite films

Fig.5. TG and DTG curves of the CS based composite films

Fig.6. Results of open combustion experiment of the CS⁃based composite films

Fig.7. Oxygen permeability of the CS based composite films

Fig.8. Preservation property of the CS based composite films

Fig.9. Mechanical properties of the CS composite based films

Fig.10. （a）~（b） surface and （c）~（d） cross⁃sectional morphology of the S2 composite film

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