This paper reports the impact of the addition of Ag or ZnO nanoparticles on the morphological, mechanical, barrier properties and migration behavior of low-density polyethylene (LDPE) films prepared by melt extrusion. Depending on the nanoparticle concentrations, the color of the films was changed, and the light transparency decreased. The addition of nanoparticles reduced the oxygen and water vapor transmission rates, as well as the mechanical (tensile strength and percent elongation) properties, compared to pure LDPE films. ZnO nanoparticles caused a greater decrease in the tensile strength of the nanocomposite films than the Ag-containing nanoparticles. The migration tests of the majority of the films, in isooctane, ethanol and acetic acid showed that the total migration limit of 10 mg/dm² was not exceeded. However, the migration tests of LDPE-based films containing 3 and 5% ZnO nanoparticles in 3% acetic acid, representing acidic foods, were determined as 15.93 and 23.29 mg/dm², respectively.

本文报道了添加Ag或ZnO纳米颗粒对通过熔融挤出制备的低密度聚乙烯（LDPE）膜的形态，机械，阻挡性能和迁移行为的影响。取决于纳米颗粒的浓度，膜的颜色改变，并且透光率降低。与纯LDPE膜相比，添加纳米颗粒降低了氧气和水蒸气的传输速率，以及机械（拉伸强度和伸长百分比）性能。ZnO纳米颗粒导致纳米复合材料薄膜的拉伸强度比含Ag的纳米颗粒更大。大多数薄膜在异辛烷，乙醇和乙酸中的迁移试验表明，总迁移极限为10 mg / dm ²没有超过。然而，含有3％和5％ZnO纳米粒子的3％乙酸溶液（代表酸性食品）的LDPE基薄膜的迁移测试分别确定为15.93和23.29 mg / dm ²。