壳聚糖/聚羟基丁酸戊酸共聚酯生物降解复合膜的制备

doi:10.3969/j.issn.1673-5854.2017.06.001

Abstract

Abstract: Using acetic acid as solvent, chitosan(CS)/poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)(PHBV) biodegradable composite films were prepared by tape casting.Scanning electron microscopy and Fourier-transform infrared were used to characterize the composite films, and the influences of different CS/PHBV mass ratio on the mechanical properties, oxygen permeability, thermal stability and biodegradation of composite films were studied. Results showed that with the increase of CS, the fractured surface of the composite films was more compact, the honeycomb structure disappeared, the number of hydroxyl and ester groups in the composite films increased. The tensile strength and elastic modulus of CS/PHBV biodegradable composite films reached the maximum when the m_CS:m_PHBV was 3:1, which were 3.57 and 26.84 MPa, respectively. The oxygen permeability was the smallest when m_CS:m_PHBV was 4:1, which was 27.7×10^-15 cm³·cm/(cm²·s·Pa). Meanwhile, due to the addition of chitosan, it was also found that the biodegradation of CS/PHBV composite films had been improved.

Key words: chitosan, PHBV, composite films, biodegradation, mechanical properties

CLC Number:

TQ35
TB484.9

WANG Ling, ZHOU Jiao, MA Xiaojun. Preparation of Chitosan/Poly(hydroxybutyrate-hydroxyhexanoate) Biodegradable Composite Films[J]. bce, 2017, 51(6): 1-5.

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Preparation of Chitosan/Poly(hydroxybutyrate-hydroxyhexanoate) Biodegradable Composite Films

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