壳聚糖-肉桂醛复合抗菌降解膜的制备及性能-食品科学.PDF

6 2016, Vol.37, No.10 食品科学 ※工艺技术 壳聚糖- 肉桂醛复合抗菌降解膜的制备及性能 1 1,2,* 2 曾少甫，胡长鹰 ，刘 婧 （1.暨南大学食品科学与工程系，广东 广州 510632 ； 2.广东省普通高校产品包装与物流重点实验室，广东 珠海 519070 ） 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。 关键词：壳聚糖膜；肉桂醛；结构表征；抗菌性 Preparation and Properties of Chitosan-Cinnamaldehyde Biodegradable Antibacterial Composite Films 1 1,2,* 2 ZENG Shaofu , HU Changying , LIU Jing (1. Department of Food Science and Engineering, Jinan University, Guangzhou 510632, China; 2. Key Laboratory of Product Packaging and Logistics of Guangdong Higher Education Institutes, Zhuhai 519070, China) Abstract: 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 co