Volume 48, Issue 7 e70044
Research Article

Superhydrophobicity of PTFE-HFM with PDMS/Nano-SiO2 Composite Coating Used in Waste Oil Purification

Yunlong Dai

Yunlong Dai

Fiber Materials Research Center, School of Textiles and Fashion, Shanghai University of Engineering Science, Guangfulin, Songjiang, Shanghai, 201620 China

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Xu Chen

Xu Chen

Fiber Materials Research Center, School of Textiles and Fashion, Shanghai University of Engineering Science, Guangfulin, Songjiang, Shanghai, 201620 China

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Weihong Gao

Corresponding Author

Weihong Gao

Fiber Materials Research Center, School of Textiles and Fashion, Shanghai University of Engineering Science, Guangfulin, Songjiang, Shanghai, 201620 China

E-mail: [email protected]; [email protected]

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Kaikai Chen

Corresponding Author

Kaikai Chen

School of Textiles Science and Engineering, Tiangong University, No. 399, Binshui West Road, Xiqing, Tianjin, 300387 China

E-mail: [email protected]; [email protected]

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Haibo Yan

Haibo Yan

Fiber Materials Research Center, School of Textiles and Fashion, Shanghai University of Engineering Science, Guangfulin, Songjiang, Shanghai, 201620 China

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Shuang Zhang

Shuang Zhang

Fiber Materials Research Center, School of Textiles and Fashion, Shanghai University of Engineering Science, Guangfulin, Songjiang, Shanghai, 201620 China

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Jingjing Yan

Jingjing Yan

Fiber Materials Research Center, School of Textiles and Fashion, Shanghai University of Engineering Science, Guangfulin, Songjiang, Shanghai, 201620 China

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Changfa Xiao

Changfa Xiao

Fiber Materials Research Center, School of Textiles and Fashion, Shanghai University of Engineering Science, Guangfulin, Songjiang, Shanghai, 201620 China

School of Textiles Science and Engineering, Tiangong University, No. 399, Binshui West Road, Xiqing, Tianjin, 300387 China

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First published: 28 May 2025

Yunlong Dai and Xu Chen co-first author.

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 SiO2 content, attaining stable superhydrophobicity. When the SiO2 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.

Data Availability Statement

DOI: https://doi.org/10.24435/materialscloud:t9-wh.

The authors declare no conflicts of interest.

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