Although biopolymers are currently considered as advantageous materials for food-packaging applications, their poor tensile strength, flexibility and barrier properties limit their applicability in the industry. To improve the properties of chitosan films used in food packaging, calcium carbonate and chestnut extract were added as fillers. The obtained films were characterized by structural, mechanical, optical, permeation, lyophilic and antimicrobial properties and compared with the properties of neat chitosan and commercial poly(lactic acid) (PLA) films. The results showed that the addition of calcium carbonate has a significant impact on barrier, mechanical and lyophilic properties of the investigated films. Compared to neat chitosan and commercial PLA films, the chitosan/calcium carbonate composite films were characterized by better barrier properties to oxygen, carbon dioxide and water vapour as well as by less hydrophilic nature. Considering mechanical properties, the tensile strength was improved, while the elongation of break worsened. Taking into account the optical and antimicrobial properties, an improvement in these parameters was observed compared to commercial PLA film, but this was strongly influenced by the presence of a chestnut extract.

尽管生物聚合物目前被认为是食品包装应用的有利材料，但其较差的拉伸强度、柔韧性和阻隔性能限制了其在工业中的应用。为了改善食品包装中使用的壳聚糖薄膜的性能，添加了碳酸钙和栗子提取物作为填料。所获得的薄膜具有结构、机械、光学、渗透、亲液和抗菌性能，并与纯壳聚糖和商业聚乳酸（PLA）薄膜的性能进行了比较。结果表明，碳酸钙的添加对所研究的薄膜的阻隔性、机械性能和亲液性能具有显着影响。与纯壳聚糖和商业PLA薄膜相比，壳聚糖/碳酸钙复合薄膜具有对氧气、二氧化碳和水蒸气更好的阻隔性能以及较低的亲水性。从机械性能来看，拉伸强度提高，但断裂伸长率恶化。考虑到光学和抗菌特性，与商用 PLA 薄膜相比，观察到这些参数有所改善，但这受到板栗提取物存在的强烈影响。