Fig. 3: Switchable adhesion properties of hydrogels via dynamic multiscale contact synergy.
From: Design of large-span stick-slip freely switchable hydrogels via dynamic multiscale contact synergy
a The relationship between the temperature and adhesion strength of DMCS-hydrogel. The effects of contact time (b) and preload c on adhesion strength at high and low temperatures against a glass probe. d Thermo-responsive switchable adhesion cycles of DMCS-hydrogel at high and low temperature. e The switchable adhesion properties of the smart hydrogel can be applied to a variety of solid substrates including inorganic and organic surfaces. f The variation of LCST in DMCS-hydrogel with different pNIPAAm content. Transmittance vs. temperature captured at 400 nm wavelength by UV-vis spectrometer. g Friction curves in time domain at high temperature. Ultra-low adhesion and high roughness enable the DMCS-hydrogel to have low friction force at high temperature. h, i Comparison of adhesion properties between DMCS-hydrogel, other reported switchable adhesive hydrogels, and other smart adhesive materials1,4,13,14,16,19,35,36. The data used are summarized in Supplementary Fig. 30 and Supplementary Table 2. j Shear adhesion tests at low temperature and high temperature and k the corresponding stretch-time curve. The adhesion area was 1 cm2. Error bars represent the standard deviation from at least three replicates. Some error bars in a are hidden by the symbols. Data in a, b, c, d, and e are presented as mean values ± SD. F force, λ stretch, t time.
