School of Chemical Engineering, Xi'an University, Xi'an, Shaanxi 710065, China E-mail:
Water Sci Technol. 2021 Oct;84(8):2040-2056. doi: 10.2166/wst.2021.426.
To obtain a kind of superhydrophobic sponge with high oil and water selectivity, the MS/TiO/PDMS sponge was prepared via a two-step hydrophobic fabrication based on the melamine sponge (MS), tetrabutyl titanate (TBOT), and polydimethylsiloxane (PDMS). The effects of modification time, the concentrations of TBOT and PDMS on the properties of the MS/TiO/PDMS sponge were studied, and the separation mechanism was also discussed based on the interaction between the oil and the surface of the MS/TiO/PDMS sponge. The results suggest that under optimal conditions, the MS/TiO/PDMS sponge show superhydrophobicity. The contact angle and adsorption capacity for oil of the MS/TiO/PDMS sponge are 149.2° and 98.5 g·g, respectively, and they can be recycled for about 25 cycles after oil-water separation test. This study prepares a new composite material with high oil-water selectivity, which is a good foundation for the development and research of new oil adsorbents.
为了获得一种具有高油水选择性的超疏水海绵，通过基于三聚氰胺海绵（MS）、钛酸四丁酯（TBOT）和聚二甲基硅氧烷（PDMS）的两步疏水制备，制备了 MS/TiO/PDMS 海绵。研究了改性时间、TBOT 和 PDMS 浓度对 MS/TiO/PDMS 海绵性能的影响，并基于油与 MS/TiO/PDMS 海绵表面之间的相互作用讨论了分离机制。结果表明，在最佳条件下，MS/TiO/PDMS 海绵表现出超疏水性。MS/TiO/PDMS 海绵的接触角和对油的吸附容量分别为 149.2°和 98.5 g·g，经过油水分离测试后，可回收约 25 次。本研究制备了一种具有高油水选择性的新型复合材料，为新型吸油剂的开发和研究奠定了良好的基础。
