相关实验视频

Updated: May 31, 2025

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer

Published on: November 30, 2020

基于多聚胺和精油的包装的关键性质的比较研究

Ewa Olewnik-Kruszkowska¹, Astha Vishwakarma², Magdalena Wrona³

¹Chair of Physical Chemistry and Physicochemistry of Polymers, Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7 Street, 87-100 Toruń, Poland.

Foods (Basel, Switzerland)

|January 25, 2025

概括

含有精油的聚乙烯 (PLA) 薄膜增强了紫外线保护和机械性能. 丁香油和茶树油电影显示减少了水蒸气的传递,丁香油是最有希望的食品包装.

科学领域:

材料科学材料科学材料科学
聚合物科学聚合物科学
食品包装技术食品包装技术

背景情况:

精油因其抗微生物和抗氧化特性而被探索为活性食品包装.
聚酸 (PLA) 是一种可生物降解的聚合物,具有食品包装应用的潜力.
添加诸如聚乙烯糖醇 (PEG) 等添加剂可以改变PLA薄膜的特性.

研究的目的:

为了评估将各种精油 (三角草,葡萄,迷香,茶树) 纳入PLA-PEG膜中的影响.
评估这些增强型PLA薄膜对于与食品接触应用的适用性.
确定最佳的精油,用于开发先进的食品包装材料.

主要方法:

用聚乙烯糖醇 (PEG) 和精油 (花生,葡萄,迷香,茶树) 制造聚酸 (PLA) 基薄膜.
对薄膜结构,形态,机械性能,抗氧化活性和水蒸气传递率 (WVTR) 的分析.
评估紫外线屏障特性和精油成分的迁移到食品仿制剂 (乙醇,乙酸,异).

主要成果:

加入精油显著增加了破裂时的延伸,并改善了紫外线屏障特性.
含有丁香油和茶树油的薄膜在WVTR中显著降低 (约为0. 1 g/m2/h) 的情况.
精油成分向酸的迁移水平低于欧盟10毫克/公斤的限制.

结论:

含有精油的基于PLA的薄膜显示了食品包装的功能性质.
丁香油和茶树油在减少水蒸气传播方面显示出显著的潜力.
根据综合性质分析,含有爪油的PLA薄膜被确定为食品包装应用中最有前途的材料.

关键词:

针叶油是指针叶油的使用方法.葡萄油是一种葡萄油.包装材料包装材料聚乙烯的多种类型迷香油的使用方法茶树油是什么意思?茶树油是什么意思

更多相关视频

Film Extrusion of Crambe abyssinica/Wheat Gluten Blends

Film Extrusion of Crambe abyssinica/Wheat Gluten Blends

Published on: January 17, 2017

A Package of Established Analytical Tools to Investigate the Solid-State Alteration of Lipid-Based Excipients

A Package of Established Analytical Tools to Investigate the Solid-State Alteration of Lipid-Based Excipients

Published on: August 9, 2022

相关概念视频

Polymer Classification: Architecture

Polymer Classification: Architecture

Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...

Polymer Classification: Stereospecificity

Polymer Classification: Stereospecificity

Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...

Types of Step-Growth Polymers: Polyesters

Types of Step-Growth Polymers: Polyesters

The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...