Electrically, Thermally, and Mechanically Anisotropic Gels with a Wide Operational Temperature Range

Van Tron Tran, Md Tariful Islam Mredha, Yoonseong Lee, Mitsugu Todo, Hongyun So, Eunju Jeong, Woosung Park, Insu Jeon

    Research output: Contribution to journalArticlepeer-review

    13 Citations (Scopus)


    Next-generation applications, such as flexible electronic devices, sensors, actuators, and soft robotics, require anisotropic functional soft materials with controlled, directional electrical and heat conductivities, mechanical properties, and responsiveness, as well as shape-morphing capability, complex designability, and wide operational temperature ranges. However, a combination of these functions in any single class of materials has been very rarely seen to date. In this study, a novel class of multi-anisotropic gels is developed to realize all these functions through a new fabrication route. The gels are synthesized by integrating cellulose with poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) in tripropylene glycol. The prepared gels exhibit high electrical and thermal conductivities of ≈200 S m−1 and ≈1.49 W m−1 K−1, respectively, with exceptional Young's modulus (≈500 MPa) and tensile strength (≈55 MPa), which are much better than the previously reported mechanical properties of PEDOT-based gels (modulus/strength ≤ 10 MPa). Moreover, the gels exhibit self-welding ability and maintain their properties for 14 d over a wide temperature range (from −50 to 35 °C), covering almost the entire atmospheric temperature range on Earth surface. It is believed that the developed gels are promising candidates for application in many next-generation flexible devices, some of which are experimentally demonstrated in this study.

    Original languageEnglish
    Article number2110177
    JournalAdvanced Functional Materials
    Issue number14
    Publication statusPublished - Apr 4 2022

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • General Chemistry
    • Condensed Matter Physics
    • General Materials Science
    • Electrochemistry
    • Biomaterials


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