以壳聚糖为涂膜基质，采用原位改性法制备了纳米CaCO₃/壳聚糖复合涂膜，考察了纳米CaCO₃质量分数对复合涂膜理化性能的影响。结果表明，添加纳米CaCO₃可以显著提高壳聚糖涂膜的拉伸强度和断裂伸长率，提高其对O₂和水蒸气阻隔能力，降低CO₂阻隔能力。当纳米CaCO₃的质量分数为1.5%时，纳米CaCO₃/壳聚糖复合涂膜的理化性能最佳。

Nano-CaCO₃/chitosan composite coating with different contents of nano-CaCO₃ are prepared through in-situ modification method with chitosan as coating matrix and the effects of nano-CaCO₃ dosage on the physicochemical properties of the composite coating are studied.The results show that the addition of nano-CaCO₃ can help the chitosan coating to lift significantly the tensile strength and elongation at break, improve the barrier ability to O₂ and water vapor, and lower the barrier ability to CO₂.The physicochemical properties of in-situ modified nano-CaCO₃/chitosan composite coating reach the best at a nano-CaCO₃ dosage of 1.5%.

韩英(1992-),女,硕士研究生,研究方向为水产品贮藏加工及质量安全控制,884803546@qq.com。