Silver-casein composite films: towards a new antibacterial coating

IF 4 3区化学 Q2 POLYMER SCIENCE

Polymer Bulletin Pub Date : 2025-06-30 DOI:10.1007/s00289-025-05913-1

Nedjma ElHouda Hadj Kaddour, Nadia Iles, Suzan Biran Ay, Hakim Blekhalfa, Abdelkader Khalil Belalem, Fouaz Lekoui, Khaldoun Bachari

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引用次数: 0

Abstract

In this study, the solution casting method was used for casein-based polymer films synthesis. For this purpose, different amounts of 0.1 M silver nitrate were added to casein (Cas) solution to obtain 1% Ag:Cas, 2% Ag:Cas, 3%Ag:Cas, 4% Ag:Cas, and 5% Ag:Cas films. Silver particles were formed in the Casein-mediated solution by temperature-induced reduction. The X-ray diffraction analysis revealed the emergence of two distinct peaks for composite films with compositions below 3% Ag. According to Scanning Electron Microscopy (SEM) images, an optimal homogeneity of Ag particles on the film surface was observed for 2% Ag:Cas composition. The mechanical tests revealed a maximum increase of the tensile strength for the 2% Ag:Cas film compared to the pure casein film. The measured absorption coefficient exhibited a proportional increase with Ag composition of the films. The thermal analysis demonstrated that the thermal resistance is enhanced in 1% Ag:Cas and 3%Ag:Cas films. The water vapor permeability of the Ag:Cas films is reduced in comparison to pure casein film. In addition, all Ag:Cas films demonstrated an antibacterial activity against Escherichia coli and Staphylococcus aureus. Therefore, the fabricated Ag:Cas films can be suitable for antibacterial coating applications.

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银-酪蛋白复合膜：迈向新型抗菌涂层

本研究采用溶液浇铸法合成酪蛋白基聚合物薄膜。为此，在酪蛋白（Cas）溶液中加入不同量的0.1 M硝酸银，得到1% Ag:Cas、2% Ag:Cas、3%Ag:Cas、4% Ag:Cas和5% Ag:Cas薄膜。在酪蛋白介导的溶液中通过温度诱导还原形成银颗粒。x射线衍射分析表明，银含量低于3%的复合薄膜出现了两个明显的峰。扫描电镜（SEM）结果表明，当Ag:Cas含量为2%时，膜表面银颗粒均匀性最佳。力学试验表明，与纯酪蛋白膜相比，2% Ag:Cas膜的拉伸强度有最大的提高。所测得的吸收系数随膜中银含量的增加而增加。热分析表明，1% Ag:Cas和3%Ag:Cas薄膜的热阻增强。与纯酪蛋白膜相比，Ag:Cas膜的水蒸气渗透性降低。此外，所有Ag:Cas薄膜都显示出对大肠杆菌和金黄色葡萄球菌的抗菌活性。因此，制备的Ag:Cas薄膜可用于抗菌涂层。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Polymer Bulletin 化学-高分子科学

CiteScore

6.00

自引率

6.20%

发文量

审稿时长

5.5 months

期刊介绍： "Polymer Bulletin" is a comprehensive academic journal on polymer science founded in 1988. It was founded under the initiative of the late Mr. Wang Baoren, a famous Chinese chemist and educator. This journal is co-sponsored by the Chinese Chemical Society, the Institute of Chemistry, and the Chinese Academy of Sciences and is supervised by the China Association for Science and Technology. It is a core journal and is publicly distributed at home and abroad. "Polymer Bulletin" is a monthly magazine with multiple columns, including a project application guide, outlook, review, research papers, highlight reviews, polymer education and teaching, information sharing, interviews, polymer science popularization, etc. The journal is included in the CSCD Chinese Science Citation Database. It serves as the source journal for Chinese scientific and technological paper statistics and the source journal of Peking University's "Overview of Chinese Core Journals."