Abstract

In this research work, ZnO nanoparticles were produced by pulsed laser ablation method, employing the fundamental wavelength of pulsed Nd:YAG laser of 1064 nm and 7 ns pulse width in deionized water. Four sizes of nanoparticles were produced using different pulse numbers of laser. Simultaneously cotton fabric samples were placed near the Zn target in the ablation container. The ZnO nano particles were in situ synthesized on cotton samples. Characteristics of produced nanoparticles were examined using excitonic absorption peak and Fourier transform infrared (FTIR). X-ray diffraction pattern and dynamic light scattering (DLS) measurement were employed to determine the crystalline structure and size distribution of nanoparticles respectively. Morphology of nanoparticles were observed using Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM). Reflection and transmittance spectra of treated cotton fabrics were measured and compared using spectrophotometer. Results show that transmittance of treated cotton is less than untreated one in UVA and UVB region. Also inductively coupled plasma device were used to study the amounts of nanoparticles on the cotton fabrics before and after 20 cycles of washing. Finally, the antibacterial properties of ZnO nanoparticles on Staphylococcus Aureus contaminated cotton fabric were tested. Results show that Staphylococcus bacteria may not survive on the treated textile even after 20 cycles of washing.

摘要

在这项研究工作中，采用脉冲激光烧蚀法制备了 ZnO 纳米粒子，采用脉冲 Nd:YAG 激光的基本波长为 1064 nm，脉冲宽度为 7 ns，在去离子水中。使用不同脉冲数的激光产生四种尺寸的纳米颗粒。同时将棉织物样品放置在消融容器中的锌靶附近。ZnO 纳米颗粒原位在棉花样品上合成。使用激子吸收峰和傅里叶变换红外 (FTIR) 检查所产生的纳米粒子的特性。采用 X 射线衍射图和动态光散射 (DLS) 测量分别确定纳米颗粒的晶体结构和尺寸分布。使用扫描电子显微镜 (SEM) 和透射电子显微镜 (TEM) 观察纳米粒子的形态。使用分光光度计测量和比较处理过的棉织物的反射和透射光谱。结果表明，经过处理的棉花在UVA和UVB区域的透光率低于未经处理的棉花。还使用电感耦合等离子体装置来研究 20 次洗涤循环前后棉织物上纳米颗粒的数量。最后，测试了金黄色葡萄球菌污染的棉织物。结果表明，即使经过 20 次洗涤循环，葡萄球菌也可能无法在处理过的纺织品上存活。