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Study on superhydrophobicity of hot embossed polytetrafluoroethylene/graphite composites

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Abstract

A large number of studies have attempted to fabricate superhydrophobic surface with micro-nano hierarchical structure on the surface of polytetrafluoroethylene (PTFE). However, the tough crystalline structure and extremely high viscosity of PTFE bring great challenges in the practical processing and industries application. In this study, we aim to fabricate superhydrophobic surface with micro-nano hierarchical structure on PTFE/graphite composite surface using hot embossing process. The as-fabricated superhydrophobic surface possesses micro-scale protrusion, nano-scale structures, and submicron fibers between the protrusions. The formation mechanism of the micro-nano hierarchical structure was analyzed numerically, and the superhydrophobicity of the embossed surfaces under different conditions was investigated experimentally. The superhydrophobic performance is fully realized at the process condition of temperature range of 210 ~ 250℃ and an embossing time of above 5 min. The impact of hot embossing process conditions on the height of protrusion and static contact angle was also analyzed. The maximum static contact angle was measured as 160.7°. Subsequently, by comparing the impact dynamics of droplets on PTFE and PTFE/ graphite composite surfaces, it is verified that PTFE/ graphite composite shows superior hydrophobicity.

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Funding

This research was supported by the foundation for the construction of first-class research institutes in China by the Guangdong Academy of Sciences (grant numbers 2021GDASYL-20210103029, 2021GDASYL-20210302002, 2018GDASCX-0103) and the Natural Science Foundation of Guangdong Province (grant numbers 2019A1515011655). BL acknowledges the financial supports by Sichuan Science and Technology Program (Grant No. 2022NSFSC1989).

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Authors and Affiliations

  1. Institute of Biological and Medical Engineering, Guangdong Academy of Sciences & National Engineering Research Center for Healthcare Devices, Guangdong, Guangzhou, 510500, China

    Yao Gong, Longsheng Chen, Qian Lv & Lili Zou

  2. Guangdong Engineering Technology Research Center for Diagnosis and Rehabilitation of Dementia, Guangzhou, 510500, China

    Yao Gong, Longsheng Chen, Qian Lv & Lili Zou

  3. School of Intelligent Manufacturing, Sichuan University of Arts and Science, Dazhou, 635002, China

    Bin Li

  4. Chinese Academy of Sciences University, Changchun, Jilin, 130000, China

    Qingran Wang

  5. School of Mechanical Engineering, Yeungnam University, Gyeongsan, 38541, Republic of Korea

    Wankun Liu

Authors
  1. Yao Gong
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  2. Bin Li
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  3. Longsheng Chen
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  4. Qian Lv
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  5. Qingran Wang
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  6. Wankun Liu
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  7. Lili Zou
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Contributions

Yao Gong: Experiments, Simulation, Formal analysis, Methodology, Writing-original draft; Bin Li: Methodology, Validation, Writing-review & editing; Longsheng Chen and Qian Lv: Methodology, Validation; Qingran Wang: Modified draft, Validation; Wankun Liu: Methodology, Formal analysis; Lili Zou: Founding acquision, Con-ceptualization, Writing-review & editing.

Corresponding author

Correspondence to Lili Zou.

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Gong, Y., Li, B., Chen, L. et al. Study on superhydrophobicity of hot embossed polytetrafluoroethylene/graphite composites. J Polym Res 30, 168 (2023). https://doi.org/10.1007/s10965-023-03539-3

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