科研之友
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摘要
Novel liquid-free ionic conductive elastomers are fabricated by the polymerization of acrylic acid (AA) in polymerizable deep eutectic solvent (PDES). Liquid metal (LM) nanodroplets are used to initiate and further cross-link polyacrylic acid (PAA) chains into a liquid-free polymeric network without any extra initiators and cross-linkers. The resulting liquid-free ionic conductive elastomers exhibit high transparency (94.1%), ultra-stretchability (2600%), and autonomous self-healing. Spin trapping electron paramagnetic resonance and dye fading experiments reveal the generation of free radicals. UV-visible spectrometry and viscosity tests demonstrate the cross-linking effect of Ga3+. The gelation time is much shorter than that of the conventional ammonium persulfate thermal initiation process. Furthermore, this liquid-free polymer material is intrinsically resistant to freezing and drying, enabling it to operate under harsh conditions. In consideration of transparency, self-healing, ultra-stretchability, moldability, and sensory features, the resulting elastomeric conductor may hold promise for industrial applications in wearable devices, force mapping, and flexible electroluminescent devices.
