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制备并研究了几种超疏水性纳米界面材料 ,具体包括 :( 1 )以多孔氧化铝为模板 ,通过一种新的模板挤压法制备了聚丙烯腈纳米纤维 ,该纤维表面在没有任何低表面能物质修饰时即具有超疏水性 ,与水的接触角可高达 1 73 8° .( 2 )利用亲水性聚合物聚乙烯醇制备了具有超疏水性的表面 ,打破了传统上只有利用疏水材料才能得到超疏水性表面的局限性 ,扩大了制备材料的应用范围 .研究表明 ,这种特殊的现象是由于聚乙烯醇分子在纳米结构表面发生重排 ,使得疏水基团向外 ,分子间氢键向内 ,从而导致整个体系的表面能降低引起的 .( 3)将聚丙烯腈纳米纤维通过典型的热解过程 ,得到了具有类石墨结构的纳米结构碳膜 ,该膜表面在广泛pH值范围内都具有超疏水的特征 ,在基因传输、无损失液体输送、微流体等方面具有更广阔的应用前景 .( 4 )利用喷涂 干燥技术制备了一种新型的同时具有超疏水及超亲油性的油水分离网膜 .研究表明 ,网膜表面特殊的微米与纳米尺寸相结合的粗糙结构导致这种特殊的性质 ,该网膜具有很高的油水分离效率 ,具有极其广阔的应用前景 .
Preparation and research of several superhydrophobic nano-interface materials, including: (1) Porous alumina as a template by a new template extrusion polyacrylonitrile nanofibers, the fiber surface in the absence of any low Surface modification of the material that is superhydrophobic, with water contact angle up to 1 73 8 °. (2) The use of hydrophilic polymer polyvinyl alcohol prepared superhydrophobic surface, breaking the traditional use of only Hydrophobic materials in order to get the superhydrophobic surface limitations, expanding the scope of the preparation of materials.Research shows that this particular phenomenon is due to the rearrangement of polyvinyl alcohol molecules in the surface of the nanostructures, making hydrophobic groups outward, the molecule (3) The polyacrylonitrile nanofibers through a typical pyrolysis process, has a graphite-like structure of nanostructured carbon film, the surface of the film in a wide range of pH value has superhydrophobic features, in the gene transfer, lossless liquid transport, microfluidics and has a broader application prospects. (4) prepared by spray drying technology A novel oil-water separation omentum with both superhydrophobic and super-lipophilic properties.Studies have shown that the particular combination of coarse and fine structures on the surface of the omentum results in this particular property, with high oily water Separation efficiency, with extremely broad application prospects.