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Biosurfactant-capped CuO nanoparticles coated cotton/polypropylene fabrics toward antimicrobial textile applications

抗菌剂 材料科学 纳米颗粒 微生物 最小抑制浓度 聚丙烯 金黄色葡萄球菌 纳米材料 最低杀菌浓度 纳米技术 银纳米粒子 细菌 微生物学 复合材料 生物 遗传学
作者
Polimetla Haripriya,M P Revathy,Megha S. Kumar,Punnakkal Navaneeth,Punathil Vasu Suneesh,Satheesh Babu T G,Darbha V. Ravi Kumar
出处
期刊:Nanotechnology [IOP Publishing]
标识
DOI:10.1088/1361-6528/ad1d15
摘要

Abstract The global COVID-19 pandemic has led to an increase in the importance of implementing effective measures to prevent the spread of microorganisms. Consequently, there is a growing demand for antimicrobial materials, specifically antimicrobial textiles and face masks, because of the surge in diseases caused by bacteria and viruses like SARS-CoV-2. Face masks that possess built-in antibacterial properties can rapidly deactivate microorganisms, enabling reuse and reducing the incidence of illnesses. Among the numerous types of inorganic nanomaterials, copper oxide nanoparticles (CuO NPs) have been identified as cost-effective and highly efficient antimicrobial agents for inactivating microbes. Furthermore, biosurfactants have recently been recognized for their potential antimicrobial effects, in addition to inorganic nanoparticles. Therefore, this research's primary focus is synthesizing biosurfactant-mediated CuO NPs, integrating them into natural and synthetic fabrics such as cotton and polypropylene and evaluating the resulting fabrics' antimicrobial activity. Using rhamnolipid (RL) as a biosurfactant and employing a hydrothermal method with a pH range of 9-10, RL capped CuO NPs are synthesized (RL-CuO NPs). To assess their effectiveness against gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) microorganisms, the RL-CuO NPs are subjected to antibacterial testing. The RL-capped CuO NPs exhibited antimicrobial activity at much lower concentrations than the individual RL, CuO. RL-CuO NPs have shown a minimum inhibitory concentration (MIC) of 1.2 mg/mL and minimum bactericidal concentration (MBC) of 1.6 mg/mL for E. coli and a minimum inhibitory concentration (MIC) of 0.8 mg/mL and a minimum bactericidal concentration (MBC) of 1.2 mg/mL for S. aureus, respectively. Furthermore, the developed RL-CuO NPs are incorporated into cotton and polypropylene fabrics using a screen-printing technique. Subsequently, the antimicrobial activity of the coated fabrics is re-evaluated, revealing that RL CuO NPs coated fabrics exhibited remarkable antibacterial properties against both gram-positive and gram-negative bacteria.
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