摘要
为改善壳聚糖膜的抗菌效果,将肉桂醛添加到壳聚糖基膜中制成壳聚糖-肉桂醛复合膜,研究肉桂醛体积分数对复合膜的物理性质、力学性能、水蒸气透过系数、官能团结构、结晶程度、微观结构以及抗菌性能的影响。结果表明:随着肉桂醛体积分数的增加,复合膜的色差、水蒸气透过系数和断裂伸长率减小,膜的厚度显著增加;当肉桂醛体积分数为2%时,膜的抗拉强度最大,为(15.77±1.13)MPa;根据傅里叶变换红外光谱分析,壳聚糖与肉桂醛有较好的相容性;肉桂醛体积分数的增加会导致膜表面结晶程度、裂纹、粗糙程度增加;复合膜的抑菌性能也随着肉桂醛体积分数的增大而显著增大。该研究可为壳聚糖-肉桂醛复合降解膜的应用提供理论依据。
To improve the antibacterial effect of chitosan film, cinnamaldehyde was added into it. As a result, we obtained an antibacterial composite film. The effects of cinnamaldehyde concentrations on the mechanical properties, physical properties, water vapor permeability, functional group structure, degree of crystallinity, microstructure, and antimicrobial properties of the composite film were studied. The results indicated that the color aberration, water vapor permeability and elongation at break of the film were decreased whereas the thickness of the film was increased significantly with increasing concentration of cinnamaldehyde（P〈 0.05）. When the cinnamaldehyde concentration was 2%, the lowest tensile strength（15.77 ± 1.13） MPa was obtained. Fourier transform infrared spectroscopic analysis revealed a better compatibility with chitosan and cinnamaldehyde. Increasing the concentration of cinnamaldehyde led to an increases in crystallinity, crack and roughness of the composite film surface. The antibacterial efficiency of the film was increased with increasing cinnamaldehyde concentration. The results obtained in this study can provide a new reference for the application of chitosancinnamaldehyde antimicrobial biodegradable composite films.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2016年第10期6-11,共6页
Food Science
基金
国家自然科学基金面上项目(31571762
21277061)
关键词
壳聚糖膜
肉桂醛
结构表征
抗菌性
chitosan film
cinnamaldehyde
structure characterization
antimicrobial activity
