Superhydrophobicity of PTFE‐HFM with PDMS/Nano‐SiO<sub>2</sub> Composite Coating Used in Waste Oil Purification
Abstract In this study, superhydrophobic polytetrafluoroethylene hollow fiber membranes (PTFE‐HFM) were prepared by coating thermalization method for oil purification. The water contact angle of the composite membrane increased from 126° to 158° with the augmentation of SiO 2 content, attaining stable superhydrophobicity. When the SiO 2 content reached 2 wt.%, the membrane exhibited structural advantages: (1) maximized surface porosity, (2) exceptional high‐temperature permeation performance (817 L·m −2 ·h −1 ·bar −1 at 150 °C), (3) significantly enhanced operational stability, showing only 0.8 % flux attenuation versus 5 % for pristine membranes during 24 h continuous operation. These results provided a foundation for developing thermally stable membrane systems to treat oily industrial wastewater.
Authors
- Yunlong Dai
- Haibo Yan (ORCID: https://orcid.org/0000-0001-5215-3138)
- Jingjing Yan (ORCID: https://orcid.org/0009-0005-9946-9830)
- Kaikai Chen (ORCID: https://orcid.org/0000-0002-7284-0741)
- Weihong Gao (ORCID: https://orcid.org/0000-0001-8053-6531)
- Shuang Zhang (ORCID: https://orcid.org/0000-0002-9818-0200)
- Chen Xu (ORCID: https://orcid.org/0000-0002-7351-2280)
- Changfa Xiao (ORCID: https://orcid.org/0000-0003-0614-7348)
Institutions
- Shanghai University of Engineering Science (CN)
- Tiangong University (CN)
Publication Details
- Journal
- Chemical Engineering & Technology
- Published
- 2025-05-28
- DOI
- https://doi.org/10.1002/ceat.70044
- Primary Topic
- Surface Modification and Superhydrophobicity
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Natural Science Foundation of China
- National Key Research and Development Program of China