Synthesis, characterization and antibacterial studies of polyvinyl alcohol (PVA)–zinc sulfide (ZnS) thin films for its application in packaging material

IF 2.5 4区化学 Q2 Engineering

Chemical Papers Pub Date : 2025-05-31 DOI:10.1007/s11696-025-04117-1

I. K. Muralidhar, K. A. Vishnumurthy, M. Madhukara Naik, M. Giridhar, R. Madhuri, H. S. Bhojya Naik, B. E. Kumara Swamy, B. V. Mohan Kumar

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Abstract

Polyvinyl alcohol (PVA) thin films though excellent packaging material does not show any antibacterial activity, and hence reduces shelf life of food, thus effort to increase its activity against bacteria is a need of time. The current work emphasizes the preparation of undoped and co-doped zinc sulfide (ZnS) nanoparticle (NPs) embedded in PVA thin films were prepared by chemical precipitation and microwave method with concentrations of 0.1, 0.2, and 0.3% of ZnS NPs. PVA was used as a capping agent. The NPs synthesized were analyzed by XRD, SEM–EDS, UV–Visible, and FTIR techniques. XRD studies revealed the formation of the face-centered cubic (FCC) structure of zinc blende. FTIR represents the characteristic peaks of Zn–S stretching vibrations at 614 cm⁻¹. The morphology was found to be smooth and spherical shape of nanoparticles from SEM. The antimicrobial activity of as synthesized PVA films was investigated against gram-positive bacteria Enterococcus faecalis (MTCC 439) and gram-negative bacteria Escherichia coli (MTCC 1559). The result showed PVA films which did not show any activity can be made to show antibacterial property by incorporation of NPs which can be used as food packaging material.

Graphical abstract

Shows the mechanism of antibacterial action of PVA ZnS thin film

Abstract Image

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聚乙烯醇(PVA) -硫化锌（ZnS）薄膜的合成、表征及抗菌研究

聚乙烯醇（PVA）薄膜虽然是优良的包装材料，但却没有表现出任何抗菌活性，从而缩短了食品的保质期，因此努力提高其抗细菌活性是需要时间的。采用化学沉淀法和微波法制备了浓度分别为0.1、0.2和0.3%的未掺杂和共掺杂硫化锌纳米粒子（ZnS NPs）。采用PVA作为旋盖剂。采用XRD、SEM-EDS、UV-Visible和FTIR等技术对合成的NPs进行了分析。XRD研究表明，闪锌矿形成了面心立方（FCC）结构。FTIR表征Zn-S在614 cm−1处的拉伸振动特征峰。扫描电镜观察到纳米颗粒形貌光滑，呈球形。研究了合成的PVA膜对革兰氏阳性菌粪肠球菌（MTCC 439）和革兰氏阴性菌大肠埃希菌（MTCC 1559）的抑菌活性。结果表明，加入NPs可使原无抗菌活性的PVA膜具有抗菌性能，可作为食品包装材料。图表摘要显示了PVA ZnS薄膜的抗菌作用机理

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来源期刊

Chemical Papers Chemical Engineering-General Chemical Engineering

CiteScore

3.30

自引率

4.50%

发文量

590

期刊介绍： Chemical Papers is a peer-reviewed, international journal devoted to basic and applied chemical research. It has a broad scope covering the chemical sciences, but favors interdisciplinary research and studies that bring chemistry together with other disciplines.