超疏水纳米氧化钴薄膜的制备及性能研究

超疏水纳米氧化钴薄膜的制备及性能研究
摘  要

近年来，超疏水表面的研究引起了人们广泛的关注。本文综述了超疏水表面现象、应用前景及制备研究进展，介绍了纳米氧化钴的特点、应用前景及制备研究进展。以草酸铵和氯化钴为原料，采用沉淀法制备了纳米氧化钴粉末，研究了制备过程中浓度、聚乙二醇、反应时间、过滤次数、干燥温度和时间以及煅烧温度对粒径的影响，研究结果表明，草酸铵浓度0.2mol/L，氯化钴0.15mol/L，滴入4滴聚乙二醇，反应时间25min，过滤5次，干燥温度100℃，干燥时间2h，煅烧温度400℃时粒径最小。然后将制备的氧化钴粉末分散到乙醇中，采用涂布方式在玻璃片上制备了超疏水纳米氧化钴薄膜，研究了薄膜厚度、浸渍方式和次数、表面修饰试剂、粒径大小对接触角和滚动角的影响，研究结果表明，通过10次反复浸渍，以1%的硬脂酸作为表面修饰剂制备出的薄膜具有最佳的超疏水性，其最大接触角为172°，滚动角为1°。接着研究了超疏水纳米氧化钴薄膜表面的热稳定性、紫外光下的稳定性以及酸碱盐溶液的稳定性，研究结果表明在300℃时薄膜表面由超疏水性变成了亲水性，紫外光下照射没什么变化，并且耐酸性不好，耐碱性较强。

关键词：超疏水性，纳米，接触角，滚动角

 
ABSTRACT

In recent years, the study of the super-hydrophobic surface has been arousing the widespread concern of people. This paper has summarized the phenomenon and the prospect of super-hydrophobic superficial and also the progress of its producing. At the same time, the thesis introduced the features of nano-cobalt oxide characteristics and the prospect of progress in research on it. Takes the grass ammonium chloride and the cobalt as the raw materials, use the way of precipitating and made the powder of nano-cobalt oxide. It researched the concentration of the test’s progress, the polyethylene glycol, the reaction time, the number of filtering, the drying temperature and time, and the effect of temperature on the size of  Calcined. The results of the research showed that the 0.2 mol/L concentration of ammonium grass, 0.15mol/L of cobalt chloride, 4 drips of infusion polyethylene glycol, the reaction time for 25min, filter for five times, drying temperature 100℃, dry Time for 2h, calcination temperature at 400℃ smallest particle size. Then, of the cobalt oxide distributed to ethanol, a coating on the glass in the form of super-hydrophobic nano-cobalt oxide film on the film thickness, dipping form and frequency, surface modification reagents, the particle size docking tentacles and rolling Kok The impact of research results show that by repeatedly dipping 10 to 1 percent of the stearic acid as a surface modification agents to the film has the best super-hydrophobic, the largest of its contact angle to 172°, rolling angle is 1°. Then the next the thesis did a  research on the thermal stability of super-hydrophobic nano-cobalt oxide film surface, the stability of UV-salt solution and the acid-base stability, the results showed that at 300℃ at the film will from the surface into a super-hydrophobic and hydrophilic, Under no changes in ultraviolet radiation, and of bad acid, alkali-resistant and stronger.

Keywords: Super-hydrophobic, nanometer, contact angle, rolling angle

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