Multimodal Wearable Sensory Platforms Without Crosstalk Between Mechanical and Thermo-Stimuli by Effective Molecular Design of Polymer Gelators
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Wearable ionoskins are one of the representative examples of the many useful applications offered by deformable stimuli-responsive sensory platforms. Herein, we propose versatile ionic conductors for high-performance, deformable and multimodal ionic sensory platforms by tailoring polymer gelators. The deformability is enhanced by binary polymer blends, which can effectively dissipate the applied stresses by doped low Tg polymer. Furthermore, we propose an effective strategy for the multimodal sensory platform that can independently detect various stimuli without signal interference through changes in two different physical properties. For this purpose, mechanically robust, thermo-responsive ion gels are prepared. The optical transmittance change arising from the LCST phenomenon between PnBMA and [BMI][TFSI] is exploited to track the external temperature. The tailoring molecular characteristics of gelators selectively improved the mechanical robustness of the gel, providing an additional application opportunity for strain sensors.