Stimulus-sensitive composite hydrogels with both pH and temperature responsiveness were prepared to simulate the mucus on fish skin and were found to have superior performance to that of the mimicked substance. The coefficients of friction (COFs) of the gels were found to be easily tunable, from a low to moderate, and then a high level. Importantly, the COF can be reversibly switched for many times by the sequential regulation of external pH and temperature.
- Yang Wu
- Xiaowei Pei
- Feng Zhou
