IL-ZnO超疏水材料的制备及其稳定性研究

Preparation of superhydrophobic IL-ZnO nanofilms and study on their stability

描述了新型[C12mim]Br-ZnO超疏水材料的制备及其紫外光(UV)照射下稳定性研究。首先将ZnO纳米薄膜沉积在玻璃基底表面,然后覆盖[C12mim]Br修饰层。IL-ZnO的形貌用SEM表征,其疏水性用接触角仪表征。研究表明,在蒲草型ZnO纳米材料表面覆盖[C12mim]Br后,获得超疏水,接触角(CA)可高达151.7±3°。用紫外光照射,可以实现光诱导的润湿性转化。用紫外光连续照射24h,黑暗放置一段时间后,接触角可回复到150±5°。表明离子液体做修饰层可以实现ZnO超疏水薄膜的稳定性。

Novel[C12mim]Br-ZnO superhydrophobic hybrid materials were synthesized and characterized.ZnO nanoparticles were first deposited on glass surfaces to produce roughness.Next,films of[C12mim]Br was coated onto these surfaces.The IL-ZnO hybrid layers were characterized by scanning-electron microscopy（SEM）.Their wettability was estimated through the measurements of static contact angles（CAs）.Coating ILs would improve the CAs and superhydrophobic[C12mim]Br-ZnO with 151.7±3°was obtained.The wettability of ZnO/[C8Ftespim]X hybrid layers can be reversibly switched by altering ultraviolet（UV）irradiation and dark storage,which showed a photo-induced reversible switch of wettability.Under ultraviolet irradiation for 24 h,the CA could remained at 150±5°after dark storage,showing introduction of IL offered the stability of super-hydrophobic nano-ZnO thin films under ultraviolet irradiation.