Recyclable Superhydrophobic Surface Prepared via Electrospinning and Electrospraying Using Waste Polyethylene Terephthalate for Self-Cleaning Applications

Author:

Kim Taegyun1,Song Man Gyu2,Kim Kanghyun3,Jeon Hyungkook4ORCID,Kim Geon Hwee12ORCID

Affiliation:

1. Department of Mechanical Engineering, Chungbuk National University (CBNU), 1 Chungdae-ro, Seowon-gu, Cheongju-si 28644, Republic of Korea

2. School of Mechanical Engineering, Chungbuk National University (CBNU), 1 Chungdae-ro, Seowon-gu, Cheongju-si 28644, Republic of Korea

3. Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang 37673, Republic of Korea

4. Department of Manufacturing Systems and Design Engineering (MSDS), Seoul National University of Science and Technology (SEOULTECH), 232 Gongneung-ro, Nowon-gu, Seoul 01811, Republic of Korea

Abstract

Superhydrophobic surfaces, i.e., surfaces with a water contact angle (WCA) ≥ 150°, have gained much attention as they are multifunctional surfaces with features such as self-cleaning, which can be useful in various applications such as those requiring waterproof and/or protective films. In this study, we prepared a solution from recycled polyethylene terephthalate (PET) and fabricated a superhydrophobic surface using electrospinning and electrospraying processes. We observed that the fabricated geometry varies depending on the solution conditions, and based on this, we fabricated a hierarchical structure. From the results, the optimized structure exhibited a very high WCA (>156.6°). Additionally, our investigation into the self-cleaning functionality and solar panel efficiency of the fabricated surface revealed promising prospects for the production of superhydrophobic surfaces utilizing recycled PET, with potential applications as protective films for solar panels. Consequently, this research contributes significantly to the advancement of environmentally friendly processes and the progress of recycling technology.

Funder

National Research Foundation of Korea

Chungbuk National University BK21 program

Publisher

MDPI AG

Subject

Polymers and Plastics,General Chemistry

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