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Transparent, mechanically robust, and ultrastable ionogels enabled by hydrogen bonding between elastomers and ionic liquids

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Abstract

Nonvolatile ionogels have recently emerged as promising soft electrolyte materials for use in flexible electronics. However, it remains challenging to fabricate highly robust and stable transparent ionogels. Here, high-performance ionogels with excellent transparency, mechanical robustness, and ultrahigh stability are designed by virtue of hydrogen bonding between poly(ethyl acrylate)-based elastomers and room-temperature ionic liquids (ILs). Through rationally tuning the chemical structures of ILs and thus achieving good compatibility of ILs with elastomers, the transparent hydrophobic ionogels exhibit super-strong mechanical properties (favorable elasticity of 15–484 kPa, ultrahigh stretchability of more than 5000%, and record-high fracture toughness of up to 4.7 kJ m−2) and high stability (high thermal stability, high voltage stability, air stability, humidity resistance, strong self-adhesion, and non-corrosive stability). In particular, it is demonstrated that a skin-like sensor fabricated using the ionogel directly not only exhibits outstanding durability (10 000 cycles at 100% strain), but is also capable of operation under harsh environmental conditions, including high vacuum, high/low temperatures, and high humidity. It is believed that this work provides new prospects for sophisticated wearable optoelectronic devices.

Graphical abstract: Transparent, mechanically robust, and ultrastable ionogels enabled by hydrogen bonding between elastomers and ionic liquids

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Publication details

The article was received on 25 Oct 2019, accepted on 04 Dec 2019 and first published on 04 Dec 2019


Article type: Communication
DOI: 10.1039/C9MH01699F
Mater. Horiz., 2020, Advance Article

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    Transparent, mechanically robust, and ultrastable ionogels enabled by hydrogen bonding between elastomers and ionic liquids

    Z. Cao, H. Liu and L. Jiang, Mater. Horiz., 2020, Advance Article , DOI: 10.1039/C9MH01699F

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