相关实验视频

Updated: Jul 18, 2025

A Freeze-Thawing Method to Prepare Chitosan-Polyvinyl alcohol Hydrogels Without Crosslinking Agents and Diflunisal Release Studies

A Freeze-Thawing Method to Prepare Chitosan-Polyvinyl alcohol Hydrogels Without Crosslinking Agents and Diflunisal Release Studies

Published on: January 14, 2020

聚乙烯醇-奥斯托尔复合膜的合成,表征和抗菌评估

Ishrat Gowsia¹, Feroz A Mir², Javid A Banday¹

¹Department of Chemistry, Natural Product Research Lab, National Institute of Technology Srinagar, Srinagar, India.

Turkish journal of chemistry

|August 25, 2023

概括

这项研究引入了一种新型的聚乙醇 (PVA) 复合物,其中包含奥斯托尔,以增强食品包装. 新材料表现出更好的机械强度,屏障性能和抗菌活性,延长易腐食品的保质期.

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
食品科学食品科学食品科学

背景情况:

聚乙醇 (PVA) 广泛用于食品包装,但在屏障性能和机械强度方面存在局限性.
提高PVA的性能对于其在食品保存中的更广泛应用至关重要.

研究的目的:

开发一种基于PVA的新型复合材料,其中包含天然产品osthol.
提高PVA在食品包装应用中的热,物理化学,机械,屏障和抗菌性能.

主要方法:

使用溶剂造方法合成了一个复合膜.
鉴定包括SEM,XRD,FT-IR和UV-Vis光谱.
对各种细菌和真菌进行了抗菌活性测试.

主要成果:

这种PVA-osthol复合物对*S. aureus*,*E. coli*,*Aspergillus niger*,*Alternaria alternata*和*Fusarium solani*具有显著的抗菌活性.
拉伸强度增加了23.79%,添加了osthol.
氧气传递率 (OTR) 和水蒸气传递率 (WVTR) 分别下降了43.03%和30.24%.
疏水性增加,接触角度从43°上升到66.7°.

结论:

与纯PVA相比,PVA-osthol复合物表现出增强的机械,屏障和抗菌性能.
改进的特性使复合材料成为包装易腐食品的有希望的候选者,可能延长保质期.

关键词:

自然产品是天然产品.这是一种PVA聚合物.抗微生物活性的抗微生物活性.食品包装食品的包装在奥斯托尔的奥斯托尔.

更多相关视频

Fabricating Superhydrophobic Polymeric Materials for Biomedical Applications

Fabricating Superhydrophobic Polymeric Materials for Biomedical Applications

Published on: August 28, 2015

Thin Film Composite Silicon Elastomers for Cell Culture and Skin Applications: Manufacturing and Characterization

Thin Film Composite Silicon Elastomers for Cell Culture and Skin Applications: Manufacturing and Characterization

Published on: July 3, 2018

相关概念视频

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...

Olefin Metathesis Polymerization: Overview

Olefin Metathesis Polymerization: Overview

Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...

Characteristics and Nomenclature of Copolymers

Characteristics and Nomenclature of Copolymers

Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...