Flexible Broadband Light Absorbers with a Superhydrophobic Surface Fabricated by Ultraviolet-assisted Nanoimprint Lithography

doi:10.1007/s40242-022-2044-7

高等学校化学研究 ›› 2022, Vol. 38 ›› Issue (3): 829-833.doi: 10.1007/s40242-022-2044-7

Flexible Broadband Light Absorbers with a Superhydrophobic Surface Fabricated by Ultraviolet-assisted Nanoimprint Lithography

WEI Wanyuan¹, LI Mengwei¹, and CHEN Yulan²

1. Department of Chemistry, Tianjin University, Tianjin 100354, P. R. China;
2. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China

收稿日期:2022-02-07 修回日期:2022-03-09 出版日期:2022-06-01 发布日期:2022-05-26
通讯作者: CHEN Yulan E-mail:yulan.chen@tju.edu.cn
基金资助:
This work was supported by the National Key Research and Development Program of China(Nos.2017YFA0207800, 2017YFA0204503).

Flexible Broadband Light Absorbers with a Superhydrophobic Surface Fabricated by Ultraviolet-assisted Nanoimprint Lithography

WEI Wanyuan¹, LI Mengwei¹, and CHEN Yulan²

1. Department of Chemistry, Tianjin University, Tianjin 100354, P. R. China;
2. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China

Received:2022-02-07 Revised:2022-03-09 Online:2022-06-01 Published:2022-05-26
Contact: CHEN Yulan E-mail:yulan.chen@tju.edu.cn
Supported by:
This work was supported by the National Key Research and Development Program of China(Nos.2017YFA0207800, 2017YFA0204503).

摘要/Abstract

摘要： We present a simple approach to fabricate a kind of composite films with a superhydrophobic and broadband light absorbing surface by ultraviolet-assisted nanoimprinting over a gradiently deposited composite matrix. The wettability and optical property of the resultant surfaces are tunable by the deposition time before polymerization(T_s) and mold's topography. Mechanically robust and elastomeric films exhibiting high sunlight absorptivity up to 98.13% and contact angle of their surfaces up to 150° are prepared under optimized conditions, as using a mold with a small pattern size(hexagonal periodic mold with cylinder diameter of ca. 37 μm) under T_s=10 min for imprinting the crosslinked poly[di(ethylene glycol) ethyl ether acrylate] and poly(isobornyl acrylate) in the presence of polypyrrole(PPy) nanoparticles. Such dual functions are found related to the hierarchical architecture of the surface, arising from the synergetic effects of the periodical patterned polymer substrate and spontaneously assembled PPy microstructures on the patterns. The current strategy based on the combination of ultraviolet-assisted nanoimprint lithography and hierarchical assembly of gradiently deposited black nano-fillers offers a new insight into the design of robust superhydrophobic and black surfaces, which is helpful to deepen our understanding of the relationship between liquid/light manipulation and micro/nanostructured surfaces.

关键词: Superhydrophobic surface, Black absorber, Composite film, Ultraviolet-assisted nanoimprint lithography, Hierarchical microstructure

Abstract: We present a simple approach to fabricate a kind of composite films with a superhydrophobic and broadband light absorbing surface by ultraviolet-assisted nanoimprinting over a gradiently deposited composite matrix. The wettability and optical property of the resultant surfaces are tunable by the deposition time before polymerization(T_s) and mold's topography. Mechanically robust and elastomeric films exhibiting high sunlight absorptivity up to 98.13% and contact angle of their surfaces up to 150° are prepared under optimized conditions, as using a mold with a small pattern size(hexagonal periodic mold with cylinder diameter of ca. 37 μm) under T_s=10 min for imprinting the crosslinked poly[di(ethylene glycol) ethyl ether acrylate] and poly(isobornyl acrylate) in the presence of polypyrrole(PPy) nanoparticles. Such dual functions are found related to the hierarchical architecture of the surface, arising from the synergetic effects of the periodical patterned polymer substrate and spontaneously assembled PPy microstructures on the patterns. The current strategy based on the combination of ultraviolet-assisted nanoimprint lithography and hierarchical assembly of gradiently deposited black nano-fillers offers a new insight into the design of robust superhydrophobic and black surfaces, which is helpful to deepen our understanding of the relationship between liquid/light manipulation and micro/nanostructured surfaces.

Key words: Superhydrophobic surface, Black absorber, Composite film, Ultraviolet-assisted nanoimprint lithography, Hierarchical microstructure

WEI Wanyuan, LI Mengwei, and CHEN Yulan. Flexible Broadband Light Absorbers with a Superhydrophobic Surface Fabricated by Ultraviolet-assisted Nanoimprint Lithography[J]. 高等学校化学研究, 2022, 38(3): 829-833.

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Flexible Broadband Light Absorbers with a Superhydrophobic Surface Fabricated by Ultraviolet-assisted Nanoimprint Lithography

Flexible Broadband Light Absorbers with a Superhydrophobic Surface Fabricated by Ultraviolet-assisted Nanoimprint Lithography

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