Abstract

In the present study, the superhydrophobic surface was fabricated by spray pyrolysis method. The precursor for the spray process was the modified Al₂O₃ (Alumina) with a fatty acid, which was dispersed in alcohol. Fourier transform infrared spectroscopy (FT-IR) and thermogravimetric analysis (TGA) was used to investigate the chemical reaction and amount of the fatty acid on surface of the Alumina. Using density functional theory (DFT) and molecular dynamics (MD) simulations, the electronic structure and adsorption mechanism of fatty acid onto the Alumina surface were obtained. Three alcohols of methanol, ethanol, and 2-propanol were used as dispersion mediums and palmitic acid and stearic acid as modifying agents on the surface of the Alumina. Dynamic light scattering analysis (DLS) showed that the stability of the spray suspension increased with the increase in carbon chain length in both fatty acid and alcohol. Increasing the stability of the spray suspension reduced the sediment of particles, especially during the spray process. As a result, the scanning electron microscopy (SEM) analysis showed that reducing the sediment of particles could improve the coverage of film on the substrate, and after examining the following results with a surface profilometer, it was found that better coverage of film caused more roughness on the surface. The convenient superhydrophobic surface on the glass substrate was obtained using the modified Alumina by stearic acid in 2-propanol alcohol with a water contact angle around 160°.

中文翻译：

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喷涂热解法沉积超疏水性脂肪酸涂层Al 2 O 3膜：分散介质对层形貌和粗糙度的影响

摘要

在本研究中，超疏水表面是通过喷雾热解法制备的。喷涂过程的前体是改性的Al ₂ O ₃（氧化铝）与脂肪酸，分散在乙醇中。傅里叶变换红外光谱（FT-IR）和热重分析（TGA）用于研究氧化铝表面的化学反应和脂肪酸的含量。利用密度泛函理论（DFT）和分子动力学（MD）模拟，获得了脂肪酸在氧化铝表面的电子结构和吸附机理。甲醇，乙醇和2-丙醇这三种醇用作分散介质，棕榈酸和硬脂酸用作氧化铝表面的改性剂。动态光散射分析（DLS）表明，喷雾悬浮液的稳定性随脂肪酸和醇中碳链长度的增加而增加。增加喷雾悬浮液的稳定性可减少颗粒的沉淀，特别是在喷涂过程中。结果，扫描电子显微镜（SEM）分析表明，减少颗粒的沉积物可以提高薄膜在基材上的覆盖率，并且在用表面轮廓仪检查以下结果后，发现更好的薄膜覆盖率会导致更多的薄膜沉积。表面粗糙度。使用改性的氧化铝通过在2-丙醇醇中的硬脂酸以约160°的水接触角在玻璃基板上获得便利的超疏水表面。发现更好的膜覆盖率导致表面上更大的粗糙度。使用改性的氧化铝通过在2-丙醇醇中的硬脂酸以约160°的水接触角在玻璃基板上获得便利的超疏水表面。发现更好的膜覆盖率导致表面上更大的粗糙度。使用改性的氧化铝通过在2-丙醇醇中的硬脂酸以约160°的水接触角在玻璃基板上获得便利的超疏水表面。