Wang Hao, Wu Yuntong, Zhao Jiajun, Gao Shan, Wang Wentao, Rashid Arif, Sun Shenglin, Hou Hanxue
College of Food Science and Engineering, Shandong Agricultural University, Engineering and Technology Center for Grain Processing of Shandong Province, Tai'an, Shandong Province 271018, China.
College of Food Science and Engineering, Shandong Agricultural University, Engineering and Technology Center for Grain Processing of Shandong Province, Tai'an, Shandong Province 271018, China; Baolingbao Biology Co., Ltd., Dezhou, Shandong Province 251200, China.
Carbohydr Polym. 2025 Nov 1;367:123988. doi: 10.1016/j.carbpol.2025.123988. Epub 2025 Jun 30.
This study investigates the effects of silicate materials, i.e. native diatomite, acid-treated diatomite, 1250-mesh meta-kaolin, 4000-mesh meta-kaolin and zeolite, on the structure, physico-chemical properties and gas-selective permeabilities of 'blown' starch/ poly (butylene adipate-co-terephthalate) (PBAT) films. Results revealed that silicate materials, particularly acid-treated diatomite, substantially enhanced the physico-chemical properties of the films. Films containing 1 % w/w silicate materials exhibited better physico-chemical properties than those containing 5 % w/w corresponding silicate materials. The tensile strength and elongation at break of films containing 1 % w/w acid-treated diatomite increased by 21.7 % and 22.2 %, respectively, relative to the control film. Compared with the control film, films containing these silicate materials exhibited significantly higher hydrophobicity and moisture resistance. Films containing 1 % w/w zeolite exhibited markedly improved gas selectivity, with their oxygen permeability reduced by 55.0 % and carbon dioxide permeability by 14.2 %, resulting in a gas selectivity ratio of 10.2 for carbon dioxide to oxygen. Moreover, packaging strawberries with films containing these silicate materials extended their shelf life, highlighting the efficacy of silicate materials in regulating the gas exchange through and enhancing the functional performance of the films. These findings suggest that starch/PBAT films containing silicate materials possess good application potential in fruit and vegetable preservation.
本研究考察了硅酸盐材料，即天然硅藻土、酸处理硅藻土、1250目偏高岭土、4000目偏高岭土和沸石，对“吹塑”淀粉/聚（己二酸丁二醇酯-对苯二甲酸丁二醇酯）（PBAT）薄膜的结构、物理化学性质和气体选择性渗透率的影响。结果表明，硅酸盐材料，尤其是酸处理硅藻土，显著增强了薄膜的物理化学性质。含有1%w/w硅酸盐材料的薄膜比含有5%w/w相应硅酸盐材料的薄膜表现出更好的物理化学性质。相对于对照薄膜，含有1%w/w酸处理硅藻土的薄膜的拉伸强度和断裂伸长率分别提高了21.7%和22.2%。与对照薄膜相比，含有这些硅酸盐材料的薄膜表现出显著更高的疏水性和防潮性。含有1%w/w沸石的薄膜表现出明显改善的气体选择性，其氧气渗透率降低了55.0%，二氧化碳渗透率降低了14.2%，导致二氧化碳与氧气的气体选择性比为10.2。此外，用含有这些硅酸盐材料的薄膜包装草莓延长了它们的货架期，突出了硅酸盐材料在调节薄膜的气体交换和增强薄膜功能性能方面的功效。这些发现表明，含有硅酸盐材料的淀粉/PBAT薄膜在果蔬保鲜方面具有良好的应用潜力。
