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Effect of chitosan on the antibacterial and physical properties of corn starch nanocomposite films
Author(s) -
Ji Na,
Qin Yang,
Xi Tingting,
Xiong Liu,
Sun Qingjie
Publication year - 2017
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.201600114
Subject(s) - chitosan , nanocomposite , bacillus cereus , starch , ultimate tensile strength , nuclear chemistry , materials science , fourier transform infrared spectroscopy , antibacterial activity , food science , chemical engineering , chemistry , composite material , bacteria , organic chemistry , biology , engineering , genetics
The influence of chitosan on the antibacterial and physical properties of corn starch nanocomposite films impregnated with calcium carbonate nanoparticles was investigated. With the increase of chitosan content, the nanocomposite films significantly enhanced antimicrobial activity against Escherichia coli , Staphylococcus aureus , and Bacillus cereus , and the films were more effective against gram‐negative bacteria. As chitosan content increased, the tensile strength of the nanocomposite films significantly increased from 2.24 to 10.71 MPa, and the highest elongation at break of the films was 134.31%, with the incorporation of chitosan at a 30% level. Fourier transform infrared spectra analysis revealed that hydrogen bonds were formed between the chitosan and the starch.