Green synthesis of CdS/flaxseed mucilage nanocomposite films using gamma irradiation for packaging applications

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Rehab Sokary, Heba A. Raslan, Rasha Mohammad Fathy
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Abstract

The most common ways to produce nanoparticles are through chemical and physical processes, which can be expensive and environmentally hazardous. Using plant extracts (green synthesis) as reducing and capping agents is a simple, cost-effective, and environmentally friendly method of lowering the usage of dangerous chemicals in the synthesis of metal nanoparticles. This study covers the environmentally friendly synthesis of cadmium sulphide nanoparticles (CdS NPs) using a blend of flaxseed extracts (FM), polyvinyl alcohol (PVA), and chitosan (Cs). The composites are then exposed to gamma irradiation at doses of 20 kGy and 40 kGy. UV–VIS absorption spectroscopy, SEM, HRTEM, EDX, and FTIR were used to analyse the produced nanocomposite films. UV–Vis absorption spectra showed considerable surface Plasmon resonance (SPR) bands at 396–440 nm, indicating that CdS NPs had been successfully synthesized. A progressive red shift in wavelength was noted, along with the broadening of the absorption band as the irradiation dose increased. Transmission electron microscopy pictures revealed that the generated CdS nanostructures were dispersed as spherical nanoparticles with remarkable structural homogeneity. Tensile strength and elongation measurements of the films revealed that the inclusion of CdS NPs improved their mechanical properties. The addition of CdS NPs to the current blends limits biodegradation in soil. Thermal gravimetric analysis findings showed that CdS NPs included in FM/PVA films had improved thermal stability. The antimicrobial activities of the tested films were performed against Staphylococcus aureus, Escherichia coli, and Candida albicans. The results revealed that all of the films exhibited more antibacterial activity against S. aureus than the two others, with the highest activity observed in nanocomposites with a high concentration of CdS.
利用伽马辐照绿色合成用于包装的 CdS/亚麻籽粘液纳米复合膜
生产纳米粒子最常见的方法是通过化学和物理过程,这些过程既昂贵又对环境有害。使用植物提取物(绿色合成)作为还原剂和封盖剂是一种简单、经济、环保的方法,可减少金属纳米粒子合成过程中危险化学品的使用。本研究采用亚麻籽提取物(FM)、聚乙烯醇(PVA)和壳聚糖(Cs)的混合物,以环保的方式合成硫化镉纳米粒子(CdS NPs)。然后将复合材料置于 20 kGy 和 40 kGy 剂量的伽马辐照下。使用紫外可见吸收光谱、扫描电镜、HRTEM、EDX 和傅立叶变换红外光谱分析所制备的纳米复合薄膜。紫外-可见吸收光谱在 396-440 纳米波长处显示出相当多的表面等离子共振 (SPR) 带,表明 CdS NPs 已成功合成。随着辐照剂量的增加,波长逐渐变红,吸收带也逐渐变宽。透射电子显微镜图片显示,生成的 CdS 纳米结构分散成球形纳米颗粒,结构均匀性非常好。薄膜的拉伸强度和伸长率测量结果表明,CdS NPs 的加入改善了薄膜的机械性能。在目前的混合物中添加 CdS NPs 限制了在土壤中的生物降解。热重分析结果表明,FM/PVA 薄膜中的 CdS NPs 提高了热稳定性。测试薄膜对金黄色葡萄球菌、大肠杆菌和白色念珠菌的抗菌活性。结果表明,所有薄膜对金黄色葡萄球菌的抗菌活性都高于其他两种薄膜,其中高浓度 CdS 纳米复合材料的抗菌活性最高。
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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