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Issue 9, 2019
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Collagen-based breathable, humidity-ultrastable and degradable on-skin device

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Realizing simultaneous high breathability and humidity stability of on-skin devices is still a critical challenge. Herein, we develop a breathable, humidity-ultrastable and degradable sensory skin by using cowskin as a skin-friendly substrate. Cowskin has similar constituents and hierarchical structure to human skin, which supplies the sensory skin with remarkable breathability and exceptional water-vapor permeability as high as 3714 g m−2 d−1, two orders of magnitude larger than conventional polydimethylsiloxane film (80 g m−2 d−1). Sensory skin features a distinct sensing mechanism that employs cowskin as a cross-scale deformable 3D sensory substrate for achieving high skin-conformability, detection sensitivity (0.144 kPa−1), fast response (200 ms), high operational stability (15 000 cycles) and wide sensory range from human physiological signals to high strain movements. Because sensory skin relies on a 3D sensory structure, its sensing ability is, therefore, free from a localized structure damage, including scratches, cuts and abrasions. Sensory skin is further processed to be superhydrophobic, gaining unaffected sensory capability under extremely humid conditions (50 °C and relative humidity of 82%) with exceptional breathability (1087 g m−2 d−1). The collagenous substrate of sensory skin is fully degradable. These outstanding advantages make sensory skin a powerful skin-friendly on-skin device.

Graphical abstract: Collagen-based breathable, humidity-ultrastable and degradable on-skin device

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Publication details

The article was received on 09 Nov 2018, accepted on 23 Jan 2019 and first published on 28 Jan 2019

Article type: Paper
DOI: 10.1039/C8TC05630G
Citation: J. Mater. Chem. C, 2019,7, 2548-2556

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    Collagen-based breathable, humidity-ultrastable and degradable on-skin device

    L. Ke, Y. Wang, X. Ye, W. Luo, X. Huang and B. Shi, J. Mater. Chem. C, 2019, 7, 2548
    DOI: 10.1039/C8TC05630G

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