目的 通过制备聚乙烯醇(PVA)/蒙脱土(MMT)/山梨酸钾活性包装膜，考察其包装性能及山梨酸钾在膜材内的释放效果。方法 通过流延法制备含有不同浓度MMT的聚乙烯醇/山梨酸钾活性包装膜，分析活性包装膜的色度、透明度、拉伸性能和含水量，同时研究山酸钾在活性膜内向脂肪性食品模拟物中的释放行为。结果 通过添加MMT改善膜材的包装性能，MMT的添加在显著提高PVA膜拉伸强度的同时还降低了PVA膜的断裂伸长率，加深了膜材的色度，降低了膜的透明度;PVA膜的含水率随着MMT浓度的提高而降低。MMT的添加可明显改变山梨酸钾向脂肪类模拟物的释放行为，当MMT的质量分数为2%时明显地降低了山梨酸钾的释放量。结论 通过调整膜内MMT的浓度可以改变活性膜的色度、拉伸强度、含水量及膜内山梨酸钾的释放行为;使用Fickian第二定律模拟山梨酸钾释放是可靠的，可为山梨酸钾抗菌包装材料的进一步开发利用提供参考。

The work aims to prepare polyvinyl alcohol (PVA)/montmorillonite (MMT)/potassium sorbate active packaging film and investigate the film properties and the release effect of potassium sorbate in the film. The PVA/potassium sorbate films with different contents of MMT were prepared by casting method. The color, opacity, tensile strength and water content of active packaging films were analyzed. The release behavior of potassium sorbate to fatty food simulant in the films was also studied. The properties of the films were improved by MMT. The addition of MMT resulted in a significant increase in tensile strength, a decrease in theelongation at break as well as the deepening of the color and the reduction of transparency of PVA films. The water content of PVA films was decreased with the increase of MMT content. The addition of MMT could significantly change the release behavior of potassium sorbate to fatty food simulant. When MMT content was 2%, the release of potassium sorbate was reduced obviously. The color, tensile strength, water content and release behavior of potassium sorbate of the films can be changed by adjustment of MMT content.It is reliable to fit the release of potassium sorbate by Fickian second law, which provides reference for the further development of potassium sorbate antibacterial packaging materials.