Preparation of Zinc Carbonate Hydroxide Coating on Aluminum Surface and Its Superhydrophobic Properties after Modification
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摘要: 将纯铝片浸泡在弱碱性的金属盐溶液中, 直接在纯铝片上原位生长出碱式碳酸锌薄膜, 然后用硬脂酸无水乙醇溶液对该薄膜进行修饰, 并对修饰前后薄膜的润湿性、微观形貌和化学成分进行了研究。结果表明: 在铝片表面生成的碱式碳酸锌薄膜具有微纳米二元结构; 该薄膜修饰前的接触角为0°, 修饰后的接触角为163.1°, 实现了由超亲水表面到超疏水表面的转变, 这是因为吸附或接枝在薄膜表面上长的低表面能烷基长链改变了薄膜的润湿性。Abstract: A pure aluminum sheet metal was put in a weakly alkaline metal salt solution, and a basic zinc carbonate coating grew on the pure aluminum sheet. Then the coating was modified with stearic acid ethanol solution, and the wettability, surface morphology and chemical composition of the coating before and after modification were studied. The results show that the basic zinc carbonate coating on aluminum surface had micro-nano binary structure, the contact angle of the coating before and after modification was 0° and 163.1°, respectively, which realized the transition from superhydrophilic surface to the superhydrophobic surface, this was because the long chain alkyl with low surface energy adsorbed or grafted on the coating surface changed the wettability of the coating.
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Keywords:
- aluminum sheet /
- zinc carbonate hydroxide /
- coating /
- modification /
- superhydrophobic surface
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