In-Situ Synthesis of CuO/TiO₂ Nanocomposite Onto Amine Modified Cotton Fabric for Antibacterial Durability and UV Protection

ABSTRACT

In this research work, we explore antibacterial activity and the UV-protection of cotton fabric functionalized with copper oxide-titanium dioxide nano composites particles (CuO+TiO₂ NCPs). Cotton fabrics (Cot) were treated with L-methionine (Am) and functionalized with bimetallic CuO+TiO₂ NCPs by pad and rolling technique. Cu(NO₃)₂ and titanium isopropoxide (TIP) were used as sources of Cu(OH)₂ and TiO₂ colloid respectively, which were then converted into CuO and TiO₂ nanoparticles (NPs) for making antibacterial and UV-protective cotton. The method yielded a crystallite size of CuO and TiO₂ NPs of 18.09 and 32.5 nm, respectively. FTIR, Raman spectroscopy, High-resolution scanning electron microscopy-Energy dispersive Spectroscopy (HRSEM), (EDS), X-ray photo spectroscopy (XPS), thermal gravimetric analysis (TGA), and XRD were used to analyze the functional group, morphology, chemical composition, thermal stability and crystalline structure of the functionalized cotton fabric samples. The results showed that an esterification reaction occurred between Am and OH in cotton fabric, which further enhanced the binding of NCPs. AmCot-CuO+TiO₂ NCPs exhibit outstanding antibacterial activity against gram-positive S. aureus and gram-negative E. coli. The UV protection factor (UPF) for AmCot-CuO+TiO₂ NCPs reached 50+; thus, multifunctional cotton fabrics with excellent antibacterial and anti-ultraviolet properties were obtained.

摘要

在这项研究工作中，我们探索了用氧化铜-二氧化钛纳米复合颗粒（CuO+TiO2-NCPs）功能化的棉布的抗菌活性和紫外线防护. 用L-甲硫氨酸（Am）对棉织物（Cot）进行处理，并用双金属CuO+TiO2-NCPs对其进行功能化处理. 分别以Cu（NO3）2和异丙氧基钛（TIP）作为Cu（OH）2和TiO2胶体的来源，将其转化为CuO和TiO2纳米粒子（NP），制备抗菌和防紫外线棉. 该方法产生的CuO和TiO2 NP的晶粒尺寸分别为18.09和32.5 nm. 采用傅立叶变换红外光谱、拉曼光谱、高分辨率扫描电子显微镜、能谱仪、X射线光电子能谱仪（XPS）、热重分析（TGA）和X射线衍射仪对功能化棉织物样品的官能团、形态、化学组成、热稳定性和晶体结构进行了分析. 结果表明，在棉织物中，Am和OH发生了酯化反应，进一步增强了NCPs的结合. AmCot-CuO+TiO2-NCPs对革兰氏阳性金黄色葡萄球菌和革兰氏阴性大肠杆菌表现出突出的抗菌活性. AmCot-CuO+TiO2-NCPs的紫外线防护因子（UPF）达到50+;从而制备出具有优异抗菌和抗紫外线性能的多功能棉织物.

KEYWORDS:

• Cotton fabric
• surface modification
• L-methionine
• CuO-TiO2 NCPs
• antibacterial
• UV-protection

关键词:

• 棉布
• 表面改性
• L-蛋氨酸
• CuO-TiO2 NCPs
• 抗菌
• 紫外线防护

Highlights

• Cotton fabric functionalized with copper oxide-titanium dioxide nano nanocomposite particles (CuO+TiO₂ NCPs) were prepared by using basic pad and rolling technique.

• CuO+TiO₂ NCPs in-situ synthesized onto the surface of cotton fabric modified by esterification of L-methionine and OH group of cellulose

• High crystalline purity of CuO+TiO₂ of NCPs is synthesized

• Cotton fabric coated with in-situ synthesized CuO-TiO₂ of NCPs were exhibit excellent antibacterial activity with laundering durability of up to 50 wash cycles and excellent UV protection

• The functionalized “fabrics” essential cotton properties, such as vapor permeability and water absorbability are maintained.

Acknowledgments

The authors thank Adama Science and Technology University, Ethiopia; for providing the necessary support and facilities for sample preparation and characterization.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Author contribution statement

Tariku Bayisa: Conceptualization, Methodology, Writing – original draft. Gemechu D: Investigation, Supervision, Validation, Writing – review & editing. Zerihun F.: Graph preparation. Neeraj K.: Supervision, Writing – review & editing. Leta G.: Antimicrobial analysis and Validation.