Poly (ionic liquids) (PILs), known as a new class of polyelectrolytes, has attracted increasing interest during the past decade. Continuous efforts on developing novel PILs via different synthetic strategies has resulted in the application of PILs across a multitude of fields, such as responsive materials, electrochemical energy materials and absorption/separation materials. Although there’re many successful efforts to attain high conductivity in PILs reported, PIL materials are still suffering low elasticity and flexibility which obstructs PILs’ potential for application such as flexible electronics. Herein, we report elastic solid-state PILs with high elasticity and conductivity. Utilizing chemical cross-linking to tailor the molecular structure of brush PILs, we abate the brittleness of raw PILs. The mechanical, thermal and dielectrical properties of PILs were investigated, we achieved well-controlled mechanical property (Young’s modulus 2.5-4.0 MPa, elongation 180-250%) as well as dielectric performance. We’ve also demonstrated the PILs’ application capability as CO<sub>2</sub>/N<sub>2</sub> separation membrane.

Elastic multi-functional poly (ionic liquids) membrane

255th National Meeting (2018)

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