用于可持续食品包装应用的可生物降解层状双氢氧化物基聚合物薄膜

IF 5.3 2区 地球科学 Q2 CHEMISTRY, PHYSICAL
Geetanjali Mishra , Payoja Praharaj , Sony Pandey , Smrutiranjan Parida
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引用次数: 3

摘要

在本研究中,采用溶液浇铸法制备了聚己内酯(PCL)和锌铝层状双氢氧化物(LDH)嵌层水杨酸盐(SA) (P-L-S纳米复合材料)的混合可生物降解薄膜。在85%相对湿度下,P-L-S(5%)纳米复合膜的水蒸气透过率仅为212.5 g/m2/d,比纯PCL膜的水蒸气透过率低55.5%。这种出色的水蒸气屏障性能主要是由于二维LDH纳米杂化材料的复杂作用。此外,LDH的羟基与进入的水分子形成氢键,进一步阻止水蒸气的通过。上述纳米复合材料表现出优异的生物降解性,在90天内分解率超过75%。在30分钟内对大肠杆菌和金黄色葡萄球菌的抑制率超过94%,与现有文献相比,这是一个有希望的发现,这是由于水杨酸盐(插在无机薄片之间)控制释放到培养基中的结果。此外,P-L-S(5%)纳米复合材料对DPPH的自由基清除能力最好。(82%)在72小时内。上述特性指出了P-L-S纳米复合膜在生物可降解包装领域的可能用途。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Biodegradable layered double hydroxide based polymeric films for sustainable food packaging applications

Biodegradable layered double hydroxide based polymeric films for sustainable food packaging applications

In this study, solution casting was used to create hybrid biodegradable films that were made of Polycaprolactone (PCL) and Zn-Al layered double hydroxide (LDH) intercalated with salicylate (SA) (P-L-S nanocomposites). P-L-S (5%) nanocomposite film has a water vapor transmission rate of just 212.5 g/m2/day at 85% relative humidity, which is 55.5% less than that of pure PCL film. This outstanding performance of the water vapor barrier is mostly due to the convoluted action of 2D LDH nanohybrids. In addition, the hydroxyl groups of LDH create hydrogen bonds with the entering water molecules, further preventing the passage of water vapor. The aforementioned nanocomposite showed excellent biodegradability by decomposing by over 75% in just 90 days. More than 94% inhibition of E. coli and S. aureus in 30 min, which is a promising finding when compared to the existing literature, was demonstrated as a result of a controlled release of salicylate (intercalated between the inorganic lamella) to the medium. The P-L-S (5%) nanocomposite additionally showed the best radical scavenging ability against DPPH. (82%) in only 72 h. The aforementioned characteristics point to the possible uses for P-L-S nanocomposite films in the domain of biodegradable packaging.

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来源期刊
Applied Clay Science
Applied Clay Science 地学-矿物学
CiteScore
10.30
自引率
10.70%
发文量
289
审稿时长
39 days
期刊介绍: Applied Clay Science aims to be an international journal attracting high quality scientific papers on clays and clay minerals, including research papers, reviews, and technical notes. The journal covers typical subjects of Fundamental and Applied Clay Science such as: • Synthesis and purification • Structural, crystallographic and mineralogical properties of clays and clay minerals • Thermal properties of clays and clay minerals • Physico-chemical properties including i) surface and interface properties; ii) thermodynamic properties; iii) mechanical properties • Interaction with water, with polar and apolar molecules • Colloidal properties and rheology • Adsorption, Intercalation, Ionic exchange • Genesis and deposits of clay minerals • Geology and geochemistry of clays • Modification of clays and clay minerals properties by thermal and physical treatments • Modification by chemical treatments with organic and inorganic molecules(organoclays, pillared clays) • Modification by biological microorganisms. etc...
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