High‐Yield, Cost‐Effective Fabrication of High‐Aspect‐Ratio Polyimide Microstructures for Robust Superhydrophobic Surfaces
Abstract Superhydrophobic surfaces (SHS), with their exceptional water‐repellent properties, have attracted great interest due to their versatile applications. The robustness of SHS has emerged as an essential issue for practical applications, as SHS are directly exposed to various harsh environment...
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2025-05-01
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| Series: | Advanced Materials Interfaces |
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| Online Access: | https://doi.org/10.1002/admi.202400839 |
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| author | Jinpyeo Jeung Inyeol Yun Hyuk Park Yoonyoung Chung |
| author_facet | Jinpyeo Jeung Inyeol Yun Hyuk Park Yoonyoung Chung |
| author_sort | Jinpyeo Jeung |
| collection | DOAJ |
| description | Abstract Superhydrophobic surfaces (SHS), with their exceptional water‐repellent properties, have attracted great interest due to their versatile applications. The robustness of SHS has emerged as an essential issue for practical applications, as SHS are directly exposed to various harsh environments, such as continuous raindrop impact, corrosive media, and extreme temperatures. Polyimide (PI) is an ideal candidate for robust SHS due to its superior mechanical, thermal, and chemical properties. However, the low processability of PI in surface microstructuring has limited its application in SHS. In this study, a high‐yield and cost‐effective fabrication method for constructing high‐aspect‐ratio PI microstructures has been developed by controlling the template surface treatment, precursor molecular weight, and vacuum process. This approach achieves an exceptional yield rate of 99.8% and an aspect ratio of 10.7, enabling the construction of various microstructures. The SHS is demonstrated by fabricating microstructures on PI surfaces using the proposed method. The PI SHS exhibits a water contact angle of up to 162° and a roll‐off angle of less than 9°. The water repellency withstands 100 tape peeling tests and remains stable after continuous exposure to temperatures up to 250 °C and various chemical reagents for 60 days, which presents excellent robustness against environmental factors. |
| format | Article |
| id | doaj-art-4b0ec2b6636748d7a8ee6181a1325b6a |
| institution | OA Journals |
| issn | 2196-7350 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Materials Interfaces |
| spelling | doaj-art-4b0ec2b6636748d7a8ee6181a1325b6a2025-08-20T01:53:37ZengWiley-VCHAdvanced Materials Interfaces2196-73502025-05-011210n/an/a10.1002/admi.202400839High‐Yield, Cost‐Effective Fabrication of High‐Aspect‐Ratio Polyimide Microstructures for Robust Superhydrophobic SurfacesJinpyeo Jeung0Inyeol Yun1Hyuk Park2Yoonyoung Chung3Department of Electrical Engineering Pohang University of Science and Technology (POSTECH) 77 Cheongam‐ro Nam‐gu Pohang Gyeongbuk 37673 Republic of KoreaDepartment of Electrical Engineering Pohang University of Science and Technology (POSTECH) 77 Cheongam‐ro Nam‐gu Pohang Gyeongbuk 37673 Republic of KoreaDepartment of Electrical Engineering Pohang University of Science and Technology (POSTECH) 77 Cheongam‐ro Nam‐gu Pohang Gyeongbuk 37673 Republic of KoreaDepartment of Electrical Engineering Pohang University of Science and Technology (POSTECH) 77 Cheongam‐ro Nam‐gu Pohang Gyeongbuk 37673 Republic of KoreaAbstract Superhydrophobic surfaces (SHS), with their exceptional water‐repellent properties, have attracted great interest due to their versatile applications. The robustness of SHS has emerged as an essential issue for practical applications, as SHS are directly exposed to various harsh environments, such as continuous raindrop impact, corrosive media, and extreme temperatures. Polyimide (PI) is an ideal candidate for robust SHS due to its superior mechanical, thermal, and chemical properties. However, the low processability of PI in surface microstructuring has limited its application in SHS. In this study, a high‐yield and cost‐effective fabrication method for constructing high‐aspect‐ratio PI microstructures has been developed by controlling the template surface treatment, precursor molecular weight, and vacuum process. This approach achieves an exceptional yield rate of 99.8% and an aspect ratio of 10.7, enabling the construction of various microstructures. The SHS is demonstrated by fabricating microstructures on PI surfaces using the proposed method. The PI SHS exhibits a water contact angle of up to 162° and a roll‐off angle of less than 9°. The water repellency withstands 100 tape peeling tests and remains stable after continuous exposure to temperatures up to 250 °C and various chemical reagents for 60 days, which presents excellent robustness against environmental factors.https://doi.org/10.1002/admi.202400839high‐aspect‐ratiomoldingpolyimide microfabricationrobust superhydrophobic surfacessurface treatment |
| spellingShingle | Jinpyeo Jeung Inyeol Yun Hyuk Park Yoonyoung Chung High‐Yield, Cost‐Effective Fabrication of High‐Aspect‐Ratio Polyimide Microstructures for Robust Superhydrophobic Surfaces Advanced Materials Interfaces high‐aspect‐ratio molding polyimide microfabrication robust superhydrophobic surfaces surface treatment |
| title | High‐Yield, Cost‐Effective Fabrication of High‐Aspect‐Ratio Polyimide Microstructures for Robust Superhydrophobic Surfaces |
| title_full | High‐Yield, Cost‐Effective Fabrication of High‐Aspect‐Ratio Polyimide Microstructures for Robust Superhydrophobic Surfaces |
| title_fullStr | High‐Yield, Cost‐Effective Fabrication of High‐Aspect‐Ratio Polyimide Microstructures for Robust Superhydrophobic Surfaces |
| title_full_unstemmed | High‐Yield, Cost‐Effective Fabrication of High‐Aspect‐Ratio Polyimide Microstructures for Robust Superhydrophobic Surfaces |
| title_short | High‐Yield, Cost‐Effective Fabrication of High‐Aspect‐Ratio Polyimide Microstructures for Robust Superhydrophobic Surfaces |
| title_sort | high yield cost effective fabrication of high aspect ratio polyimide microstructures for robust superhydrophobic surfaces |
| topic | high‐aspect‐ratio molding polyimide microfabrication robust superhydrophobic surfaces surface treatment |
| url | https://doi.org/10.1002/admi.202400839 |
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