油水分离铜网材料的制备及分离效率研究

Study of Preparation and Separation Efficiency of Oil-Water Separation Materials

摘要: 近年来特殊浸润性材料以其疏水或疏油的优良特性在油水分离领域中大受欢迎。铜网作为一种廉价易得的惰性金属滤网，有较强的稳定性和可加工性。通过化学镀的方法，在铜网材料表面沉积一层银粒子，经硫醇修饰后制得超疏水亲油的表面材料，进行油水分离考察。采用两种不同表面张力的油性液体(正己烷、石油醚)分别与不同含盐量的水样(去离子水、10%盐水、15%盐水)混合进行油水分离试验，计算不同表面张力油水混合物的分离效率并分析相应机理。研究发现：铜网孔径越小，疏水性能越好，油水分离效率也更高，网孔直径380 μm的铜网的接触角167˚，针对不同油水混合物，其油水分离效率最高可达到99.62%。

Abstract: In this thesis, superhydrophobic and lipophilic copper mesh has been fabricated by simple elec-troless galvanic deposition methods. The wetting behaviors and oil-water separation of the as-prepared copper mesh were investigated. The surface morphology and composition were also evaluated to understand the forming mechanism of superhydrophobicity. Oil-water separation experiments were carried out by mixing oil liquids with different surface tensions (n-hexane, pe-troleum ether) and water samples with different salt contents (deionized water, 10% and 15% NaCl solution), respectively. The separation efficiency of oil-water mixtures with different surface tensions was calculated and the corresponding mechanism was analyzed. The results show that the contact angle of the copper mesh with pore size of 380 μm is 167˚. And the oil-water separation efficiency increased as pore size of the copper mesh decreased. For different oil-water mixtures, the highest oil-water separation efficiency can reach 99.62%.