One-Step Fabrication of a Functionally Integrated Device Based on Polydimethylsiloxane-Coated SiO2 NPs for Efficient and Continuous Oil Absorption

Materials

卷:14

Chang Jiao¹  Jiafeng Shen²  Guannan Ju³  Xinyu Zhao³  Lei Zhou³  Yihao Luan³ 

[1] China National Accreditation Service for Conformity Assessment, Beijing 100062, China;

[2] School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China;

[3] School of Materials Science and Engineering, Shandong University of Technology, Zibo 255000, China;

关键词: functionally integrated device;    oil-water separation;    superhydrophobic;    superoleophilic;   

DOI  :  10.3390/ma14205998

来源: DOAJ

【 摘 要 】

The construction of superhydrophobic surfaces necessitates the rational design of topographic surface structure and the reduction of surface energy. To date, the reported strategies are usually complex with multi-steps and costly. Thus, the simultaneous achievement of the two indispensable factors is highly desired, yet rather challenging. Herein, we develop a novel structure engineering strategy of realizing the fabrication of a functionally integrated device (FID) with a superhydrophobic surface via a one-step spraying method. Specifically, silica nanoparticles are used to control the surface roughness of the device, while polydimethylsiloxane is employed as the hydrophobic coating. Benefitting from the adopted superhydrophobicity, the as-fabricated FID exhibits a continuous, excellent oil-water separating performance (e.g., 92.5% separating efficiency) when coupled with a peristaltic pump. Notably, a smart design of incorporating a gas switch is adopted in this device, thereby effectively preventing water from entering the FID, realizing thorough oil collection, and avoiding secondary pollution. This work opens up an avenue for the design and development of the FID, accessible for rapid preparation and large-scale practical application.

【 授权许可】

Unknown