粉煤灰超疏水不锈钢网的制备及油水分离

Preparation of fly ash superhydrophobic mesh for effectiveoil-water separation

摘要:

采用树脂粘接法，将硬脂酸修饰后的粉煤灰用环氧树脂粘接在不锈钢网骨架表面，制备了超疏水不锈钢网，并对其进行了TEM、SEM、FTIR和接触角等表征。结果显示：在高倍显微镜下改性后的超疏水不锈钢网表面呈一定粗糙度的微纳米分级结构，静态水接触角高达153°。此外，该超疏水不锈钢网具有良好的机械稳定性和超疏水耐久性，其表面经机械磨损试验100次后水静态接触角仍高达141°。该材料用于多种油/有机溶剂与水的混合液的分离中，分离效率均高于94%。

Abstract:

Superhydrophobic stainless steel mesh was prepared by using epoxy resin to bondthe stearic acidmodified fly ash on the surface of stainless steel mesh skeleton. The as-prepared mesh was characterized by TEM, SEM, FTIR, and contact angle measurement. Theresults showed the surface of the modified super hydrophobic stainless steel mesh under high power microscope exhibited a micro-nanohierarchicalstructure with a certain roughness, and the water contact angle of the mess was up to 153°. In addition,the as-prepared stainless steel mesh had good mechanical stability and superhydrophobic durability. The water contact angle of the surface was still as high as 141° after 100 mechanical abrasiontests. The material was used in the separation of various oil/organic solvents and water mixtures, and the separation efficiency wasall higher than 94%.