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Construction of Janus structures on thin silk fabrics via misting for wet–thermal comfort and antimicrobial activity
[Display omitted] •Janus silk fabrics with asymmetric wettability were fabricated using a facile mist method.•Wetting gradient could be conveniently regulated through changing the mist time.•Wet–thermal comfort was achieved while breathability was negligibly affected. Owing to their small fiber diam...
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Published in: | Journal of colloid and interface science 2024-02, Vol.656, p.587-596 |
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Main Authors: | , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | [Display omitted]
•Janus silk fabrics with asymmetric wettability were fabricated using a facile mist method.•Wetting gradient could be conveniently regulated through changing the mist time.•Wet–thermal comfort was achieved while breathability was negligibly affected.
Owing to their small fiber diameter (10–15 μm), silk fabrics are always thin (32–90 g m−2). Therefore, construction of the Janus surfaces of silk fabrics that possess excellent multifunctionality remains a formidable challenge. Herein, first, silk fabrics were grafted using glycidyltrimethylammonium chloride to form a superhydrophilic surface (G-side). Then, a unilateral hydrophobic surface (O-side) was readily fabricated by mist coating octadecyltrichlorosilane-functionalized SiO2 nanoparticles (NPs) to produce hierarchical surface textures. To prevent NP penetration from the G-side to the O-side, a “fireproof isolation” method was employed. Consequently, Janus silk fabrics (JanSFs) bearing asymmetric wettability were prepared, and their wetting gradient could be conveniently regulated. With the mist time ranging from 4 to 7 min, the unidirectional transport index and efficiency of the unidirectional water transport increased and decreased by 13.2 and 10.4 times, respectively. Sweat could be effectively drained away from human skin to ensure that the skin was dry and comfortable. Compared with the surface temperature of the raw fabric, the raw fabric of JanSFs increased by 2.7 °C. Furthermore, the breathability of JanSF was negligibly affected, and the outer O-side of the JanSF showed substantial antibacterial activity. This study is important for designing JanSFs that exhibit unidirectional water transport. |
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ISSN: | 0021-9797 1095-7103 |
DOI: | 10.1016/j.jcis.2023.11.042 |