Transparent hierarchical micro-nano structure PTFE-SiO2 nanocomposite thin film with superhydrophobic, self-cleaning and anti-icing properties
Transparent hierarchical micro-nano structure PTFE-SiO2 nanocomposite thin film with superhydrophobic, self-cleaning and anti-icing properties
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DOI：
10.1016/j.ijleo.2021.166967
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发表时间：
2021-05-11
期刊：
影响因子：
3.1
通讯作者：
Aghaei, Abbas Ali
中科院分区：
文献类型：
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作者：
Eshaghi, Akbar;Mesbahi, Morteza;Aghaei, Abbas Ali
超疏水表面通常被推荐用于防冰应用，因为它们具有很高的拒水能力并减少冰的积聚和粘附。在这项研究中，PTFE-SiO2薄膜与不同浓度的二氧化硅（0，1，2和5克/升）沉积在玻璃基板上的溶胶-凝胶浸涂法。通过水接触分析仪测量样品上的水接触角。利用衰减全反射傅里叶变换红外光谱（ATR-FTIR）和场发射扫描电子显微镜（FE-SEM）研究了薄膜表面形成的化学键和薄膜表面形貌。在不同温度（200至500摄氏度）下评估膜的热稳定性。此外，在紫外光照射下的膜在紫外辐射下的稳定性进行了研究。采用模拟静态和动态方法研究了薄膜的防冰性能。使用氧化铁粉末评价膜的自清洁性能。在具有PTFE膜而没有二氧化硅纳米颗粒的样品上的水接触角等于146 °。膜表面上的水接触角随着二氧化硅纳米颗粒的量从0增加到1g/l而保持恒定。通过将二氧化硅纳米颗粒的量增加到2g/l d，接触角增加到155 °。随着二氧化硅纳米粒子的量增加到5g/l，水接触角减小。因此，选择具有2g/l SiO2的PTFE-SiO2薄膜作为最佳薄膜。热稳定性和紫外线辐射测试的结果表明，该膜分别在高达400摄氏度和16天的紫外线辐射下是稳定的。事实上，最佳薄膜显示出防结冰和自清洁特性。
Superhydrophobic surfaces are often recommended for anti-icing applications due to their high ability to repel water and reduce ice accumulation and adhesion. In this study, PTFE-SiO2 thin films with different concentrations of silica (0, 1, 2 and 5 g/l) were deposited on the glass substrate by a sol-gel dip coating method. Water contact angle on the samples were measured by a water contact analyzer. Attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and field emission scanning electron microscopy (FE-SEM) techniques were used to investigate the chemical bonds formed on the film surface and film surface morphology. The thermal stability of the films was evaluated at different temperatures (from 200 to 500 degrees C). Also, the stability of the film under ultraviolet radiation was investigated under UV light irradiation. Also, the anti-icing properties of the films were investigated using both simulated static and dynamic methods. Self-cleaning properties of the film were evaluated using iron oxide powder. The water contact angle on the sample with PTFE film without silica nanoparticles is equal to 146-;. The water contact angle on the film surface remains constant with increasing amount of the silica nanoparticles from 0 to 1 g/l. By increasing the amount of the silica nanoparticles to 2 g/l d, the contact angle increases to 155-. With increasing the silica nanoparticles amount to 5 g/l, water contact angle decreases. So, PTFE-SiO2 thin film with 2 g/l SiO2 was selected as an optimal thin film. The results of the thermal stability and UV irradiation tests showed that the films were stable up to 400 degrees C and 16 days of UV radiation, respectively. Indeed, the optimal thin film showed anti-icing and self-cleaning properties.