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首页> 外文期刊>Nanotechnology >High temperature, transparent, superhydrophobic Teflon AF-2400/Indium tin oxide nanocomposite thin films
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High temperature, transparent, superhydrophobic Teflon AF-2400/Indium tin oxide nanocomposite thin films

机译：高温，透明，超疏水的Teflon AF-2400 /铟锡氧化铟锡纳米复合薄膜

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摘要

The outstanding properties of Teflon AF-2400-chemical, optical, etc-inspired us to make modifications to enhance its hydrophobicity. We prepared an AF-2400/indium tin oxide (ITO) nanocomposite by a spin coating technique at room temperature, using the AF-2400 polymer as the matrix and ITO nanoparticles as the filler. Different ITON concentrations ranging from 3 to 30 mg ml(-1) were prepared to study the effect of nanoparticle loading on the films' properties and superhydrophobicity. The effect of spin speed and annealing temperature was also studied. Atomic force microscopy, x-ray photoelectron spectroscopy, and UV-vis analysis were employed to characterize the prepared films The results indicated that the film's low surface energy and nano/micro-features made it superhydrophobic. Increasing the ITON concentration to 15 mg ml(-1) improved the superhydrophobicity of the composite film by increasing the surface roughness. The coating showed superhydrophobic behavior with a static contact angle (SCA) around 152 degrees and contact angle hysteresis less than 2 degrees. The nanocomposite films also exhibited excellent thermal stability, sustaining temperatures as high as 240 degrees C without losing their superhydrophobic behavior. Three models, Wenzel, Cassie-Baxter, and Shuttleworth-Bailey, were used to predict the SCA. The results confirmed that the latter model gave the best prediction. In addition to superhydrophobicity, the AF-2400/ITON films coated on a glass substrate showed very high transparency-around 95% in the visible and infrared ranges. An effective medium theory, the Bergman representation, was used to simulate the transmittance of the AF-2400/ITON nanocomposites. The measured and simulated transmittance values were in good agreement in the visible range. Based on our results, this coating may be highly useful for many practical applications, including solar cell coatings, chemical resistance protective coatings, and more.
机译：Teflon AF-2400-化学，光学等的优异性能，我们鼓励我们进行修饰，以提高其疏水性。我们在室温下通过旋涂技术制备了AF-2400 /铟锡（ITO）纳米复合材料，使用AF-2400聚合物作为基质和ITO纳米粒子作为填料。制备范围为3至30mg mL（-1）的不同ITON浓度，以研究纳米颗粒加载对薄膜性能和超疏水性的​​影响。还研究了旋转速度和退火温度的影响。采用原子力显微镜，X射线光电子能谱和UV-VIS分析表征制备的薄膜，结果表明薄膜的低表面能和纳米/微特征使其成为超疏水性的​​。将ITON浓度增加到15mg ml（-1）通过增加表面粗糙度来改善复合膜的超水性。涂层显示出具有约152度的静态接触角（SCA）的超疏水行为，并且接触角滞后小于2度。纳米复合膜还表现出优异的热稳定性，维持温度高达240℃，而不会失去其超疏水行为。三种型号，Wenzel，Cassie-Baxter和Shuttleworth-Bailey被用来预测SCA。结果证实，后一种模型给出了最佳预测。除了超疏水性之外，涂在玻璃基板上的AF-2400 / ITON薄膜在可见和红外线范围内呈现非常高的透明度 - 约95％。使用有效的介质理论，伯格曼表示，用于模拟AF-2400 / ITON纳米复合材料的透射率。测量和模拟的透射率值在可见范围内很好。基于我们的结果，该涂层对于许多实际应用，包括太阳能电池涂层，耐化学性保护性涂层等，这种涂层可能非常有用。

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