The triboelectric nanogenerator (TENG) has been anticipated as a cost-effective energy harvesting device that can convert mechanical energies to electricity. Further to the modification of structural and functional properties of triboelectric materials, an integration of self-healability has been explored as an advanced platform for the development of multifunctional TENGs due to their improved lifetime and function. In this study, we demonstrate the versatility of a reactive block copolymer approach that allows for the fabrication of ionic poly(hindered urea)-based covalent adaptive networks having pendant fluorinated species formulated with ionic liquid as effective self-healable triboelectric materials. The reactive block copolymer is well-defined, designed with a dynamic t-butylamino block for self-healability and a dielectric fluorinated block for improved triboelectric output, and used as a multifunctional crosslinker. Fabricated by two-step polyaddition in combination with physical blending with ionic liquid, the formed ionic fluorinated poly(hindered urea) networks crosslinked with reactive block copolymer have enhanced TENG outputs while retaining good self-healing and mechanical strength. Promisingly, their recovery of triboelectric performance is greater than 90% upon the repair of damaged surfaces. This work demonstrates the versatility of the new reactive block copolymer approach to fabricate dynamic PHU networks exhibiting desired properties useful for advanced self-healable-TENG-based energy harvesting devices and electronics.
Bibliographical noteFunding Information:
This work is supported from Natural Science and Engineering Research Council (NSERC) in Canada through Discovery Grant (RGPIN-2021-03473) and Canada Research Chair (CRC) (950-231058) Award, National Research Foundation (NRF) of Korea (2019R1I1A1A01060653), and Ministry of Trade, Industry and Energy (20010566). The Office of the VP Research at Concordia University is also acknowledged for the Horizon Postdoctoral Fellowship of Pothana Nellepalli and Concordia University Graduate Incentive Fellowship of Twinkal Patel. Authors thank Prof. Suong Van Hoa for our access to a tensile tester and Dr Heng Wang for his tensile measurements at Concordia Center of Composite (ConCom).
© 2022 The Royal Society of Chemistry.
ASJC Scopus subject areas
- Polymers and Plastics
- Organic Chemistry