食品包装

Abstract(#br)Ethyl cellulose (EC)/polydimethylsiloxane (PDMS) composite films were prepared at various concentrations of PDMS in the films (0, 5, 10, 15, and 20 wt.%). Morphological and chemical analysis by EDX-SEM and ATR-FTIR showed that EC-rich matrices and PDMS-rich particles were formed, with the two polymers interacting through H\u003cce:glyph name=\"sbnd\"/\u003ebonds. The number and diameter of particles in the composite depended on the PDMS content and allowed a fine tuning of several properties such as opacity, hydrophobicity, water uptake, and water permeability.

Carbon-neutral and eco-friendly biomass-based processes are recognized as a frontier technology for sustainable development. In particular, biopolymers are expected to replace petrochemical-based films that are widely used in food packaging. In this study, the fabrication conditions of functional (antioxidant and antibacterial) bioelastomers were investigated using by-products from the juice processing (experimental group) and freeze-dried whole fruit (control group).

碳中性和生态友好的生物质工艺被公认为可持续发展的前沿技术。特别是生物聚合物有望取代广泛应用于食品包装的石油化工基薄膜。本研究以果汁加工副产物(实验组)和冻干全果(对照组)为原料，考察功能性(抗氧化和抗菌)生物弹性体的制备条件。将聚二甲基硅氧烷( PDMS )与25或50 wt %的亚氨粉(果汁加工副产物和冷冻干燥全果)混合，采用铸造法制备生物弹性体。根据拉伸强度和杨氏模量测试了生物弹性体的力学性能。当混合料中含有50wt %的氨粉时，强度不适合于预期的目的。其次，对生物弹性体的表面和化学性质进行了分析，与PDMS膜(不添加亚砷酸盐粉)相比，添加亚砷酸盐粉并没有显著改变这些性能。但添加海棠粉对抗氧化和抗菌活性有显著影响，50wt %比25wt %表现出较高的活性。特别是由海棠汁加工副产物制备的生物弹性体，其抗氧化和抗菌活性分别比对照组(冻干海棠粉制备的生物弹性体)低约1.4倍和1.5倍。

碳中性和生态友好的生物质工艺被公认为可持续发展的前沿技术。特别是生物聚合物有望取代广泛应用于食品包装的石油化工基薄膜。本研究以果汁加工副产物(实验组)和冻干全果(对照组)为原料，考察功能性(抗氧化和抗菌)生物弹性体的制备条件。将聚二甲基硅氧烷( PDMS )与25或50 wt %的亚氨粉(果汁加工副产物和冷冻干燥全果)混合，采用铸造法制备生物弹性体。以拉伸强度和杨氏模量为指标，测定了该生物弹性体的力学性能。当混合料中含有50wt %的氨粉时，强度不适合于预期的目的。其次，对生物弹性体的表面和化学性质进行了分析，与PDMS膜(不添加亚砷酸盐粉)相比，添加亚砷酸盐粉并没有显著改变这些性能。但添加海棠粉对抗氧化和抗菌活性有显著影响，50wt %比25wt %表现出较高的活性。特别是由海棠汁加工副产物制备的生物弹性体，其抗氧化和抗菌活性分别比对照组(冻干海棠粉制备的生物弹性体)低约1.4倍和1.5倍。