Preparation and Characterization of Chitosan—Agarose Composite FilmsReportar como inadecuado


Preparation and Characterization of Chitosan—Agarose Composite Films


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1

Department of Chemistry, College of Science, Guangdong Ocean University, Zhanjiang 524088, China

2

College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China

3

School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China





*

Authors to whom correspondence should be addressed.



Academic Editor: Armando Silvestre

Abstract Nowadays, there is a growing interest to develop biodegradable functional composite materials for food packaging and biomedicine applications from renewable sources. Some composite films were prepared by the casting method using chitosan CS and agarose AG in different mass ratios. The composite films were analyzed for physical-chemical-mechanical properties including tensile strength TS, elongation-at-break EB, water vapor transmission rate WVTR, swelling ratio, Fourier-transform infrared spectroscopy, and morphology observations. The antibacterial properties of the composite films were also evaluated. The obtained results reveal that an addition of AG in varied proportions to a CS solution leads to an enhancement of the composite film’s tensile strength, elongation-at-break, and water vapor transmission rate. The composite film with an agarose mass concentration of 60% was of the highest water uptake capacity. These improvements can be explained by the chemical structures of the new composite films, which contain hydrogen bonding interactions between the chitosan and agarose as shown by Fourier-transform infrared spectroscopy FTIR analysis and the micro-pore structures as observed with optical microscopes and scanning electron microscopy SEM. The antibacterial results demonstrated that the films with agarose mass concentrations ranging from 0% to 60% possessed antibacterial properties. These results indicate that these composite films, especially the composite film with an agarose mass concentration of 60%, exhibit excellent potential to be used in food packaging and biomedical materials. View Full-Text

Keywords: chitosan; agarose; composite films; properties chitosan; agarose; composite films; properties





Autor: Zhang Hu 1,* , Pengzhi Hong 2, Mingneng Liao 1, Songzhi Kong 1, Na Huang 1, Chunyan Ou 3 and Sidong Li 1,*

Fuente: http://mdpi.com/



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