【摘要】 采用简单的牺牲模板法在不锈钢网上构筑稳定的超疏水薄膜。首先通过浸泡沉积在不锈钢网上制备出分布均匀的ZIF-L(Co)纳米片阵列结构(ZIF-NFA),然后以此为牺牲模板,在室温下制备出微纳米尺寸的钴氢氧化物纳米片状阵列(Co LDH-NFA),最后通过浸泡硅烷降低其表面能。通过油水分离、溅射试验、抗污试验和耐酸碱试验,分别评价其油水分离效率、疏水性能、抗污性能和耐蚀性,并通过接触角测试、扫描电子显微镜(SEM)以及X-射线衍射(XRD)对不锈钢网表面的疏水程度以及表面结构进行分析。结果表明共沉积后的不锈钢网表面呈现3D多孔蜂巢状微纳结构。接触角测试表明,所制备的薄膜呈现良好的超疏水性能,静态接触角达157.3°,其油水分离效率均大于95%,具有一定的耐腐蚀性能且具有良好的抗污性。因此通过牺牲模板法构筑的蜂巢状微纳结构不仅具备超疏水特点,同时具备ZIFs材料的高稳定性,且该方法技术简单、反应条件温和、价格低廉、易于批量化生产,为MOFs在制备超疏水材料方面的应用提供了一个新的思路。更多还原

【Abstract】 A stable superhydrophobic film is constructed onto stainless steel mesh by a simple sacrificial template method. Firstly, the uniform distribution of zeolitic imidazolate framework nanoflake array(ZIF-NFA)(ZIF-L(Co)) is prepared by simple immersion deposition on stainless steel mesh. Then, using this as a sacrificial template, micro-nano scale cobalt hydroxide nanosheet array(Co LDH-NFA) is prepared at room temperature. Finally, its surface energy is reduced by soaking it in silane. The oil-water separation efficiency, hydrophobic performance, fouling resistance and corrosion resistance of the stain less steel mesh are evaluated by oil-water separation, sputtering test, fouling resistance test and acid and alkali resistance test. The hydrophobic degree and surface structure of the stain less steel mesh are analyzed by using contact angle test, scanning electronic microscopy(SEM) and X-ray diffraction(XRD). SEM and XRD analysis show that the surface of the stain less steel mesh show a 3D porous honeycomb-like micro-nano structure. Contact angle test demonstrate that the prepared film presents nice superhydrophobic performance, whose static contact angle is 157.3°, oil and water separation efficiency is more than 95%, exhibiting a certain corrosion resistance and good fouling resistance. Therefore, the honeycomb micro-nano structure prepared by the sacrificial template method, has not only the characteristics of superhydrophobic, but also the high stability of ZIFs materials. Moreover, the sacrificial template method under mild reaction conditions is simple, low cost and easy to mass production, providing a new idea for the application of MOFs in the preparation of superhydrophobic materials.更多还原