The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China.
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China.
Chemosphere. 2022 Sep;303(Pt 1):134756. doi: 10.1016/j.chemosphere.2022.134756. Epub 2022 May 6.
Three-dimensional (3D) porous architecture has attracted considerable attention in remediation of oil/water emulsion. In present work, an air superhydrophilic/superoleophobic diatomite porous ceramic (AS-DC) was prepared, using SiO whiskers modified diatomite ceramic as the substrate and FS-50 as the modifier. The interconnected SiO whiskers intertwined on the skeleton of ceramic block forming a 3D network structure, which not only improved the wettability of AS-DC, but also reinforced its mechanical property (about 2.5 MPa of compressive strength). The as-prepared AS-DC with intrinsically superoleophobicity (154°) and superhydrophilicity (0°) exhibited an underwater oil contact angle of 161°, suggesting a multifunctional separation capability. By simply assembling AS-DC with pipes and a pump, it could not only separate the surfactant-stabilized oil-in-water emulsion in a permeation flux as high as 107.8 kg min m with a selectivity of >95%, but also collect the clean water from the floating oil/water mixture in a flux of 197.4 kg min m and a selectivity of ∼99%. In addition, the AS-DC was resistant to the salt/acid/alkaline corrosion and temperature fluctuation. The mechanical/chemical firmness of AS-DC renders it tremendous potential as a robust 3D architecture in real application for purification of oil/water mixture.
三维（3D）多孔结构在油水乳液的修复中引起了相当大的关注。在本工作中，使用 SiO 晶须改性硅藻土陶瓷作为基底和 FS-50 作为改性剂，制备了空气超亲水/超疏油硅藻土多孔陶瓷（AS-DC）。相互交织的 SiO 晶须交织在陶瓷块的骨架上，形成了 3D 网络结构，不仅提高了 AS-DC 的润湿性，而且增强了其机械性能（抗压强度约为 2.5 MPa）。所制备的 AS-DC 具有本征的超疏油性（154°）和超亲水性（0°），水下油接触角为 161°，表现出多功能分离能力。通过简单地将 AS-DC 与管道和泵组装在一起，不仅可以以 107.8 kg min m 的渗透通量和 >95%的选择性分离表面活性剂稳定的水包油乳液，还可以以 197.4 kg min m 的通量和 ∼99%的选择性从浮油/水混合物中收集清洁水。此外，AS-DC 还能抵抗盐/酸/堿腐蚀和温度波动。AS-DC 的机械/化学坚固性使其在油水混合物净化的实际应用中具有巨大的潜力，成为一种坚固的 3D 结构。
