In Situ Production of Graphene-Fiber Hybrid Structures

Mandana Akia, Lee Cremar, Mircea Chipara, Edgar Munoz, Hilario Cortez, Hector de Santiago, Fernando J Rodriguez-Macias, Yadira I Vega-Cantú, Hamidreza Arandiyan, Hongyu Sun, Timothy P Lodge, Yuanbing Mao, Karen Lozano

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    We report a scalable method to obtain a new material where large graphene sheets form webs linking carbon fibers. Film-fiber hybrid nonwoven mats are formed during fiber processing and converted to carbon structures after a simple thermal treatment. This contrasts with multistep methods that attempt to mix previously prepared graphene and fibers, or require complicated and costly processes for deposition of graphene over carbon fibers. The developed graphene-fiber hybrid structures have seamless connections between graphene and fibers, and in fact the graphene "veils" extend directly from one fiber into another forming a continuous surface. The graphene-fiber hybrid structures are produced in situ from aqueous poly(vinyl alcohol) solutions. The solutions were subjected to centrifugal spinning to produce fine nanofiber mats. The addition of salt to the polymer solution stimulated a capillarity effect that promoted the formation of thin veils, which become graphene sheets upon dehydration by sulfuric acid vapor followed by carbonization (at relatively low temperatures, below 800 °C). These veils extend over several micrometers within the pores of the fiber network, and consist of crystalline graphene layers that cross-link the fibers to form a highly interconnected hybrid network. The surface area and pore diameter of the hybrid structures were measured to be 521 m2g-1 and 10 nm, respectively. The resulting structure shows high electrical conductivity, 550 S/m, and promising shielding of electromagnetic interference, making it an attractive system for a broad range of electronic applications.
    Original languageEnglish
    JournalA C S Applied Materials and Interfaces
    Volume9
    Issue number30
    Pages (from-to)25474-25480
    Number of pages7
    ISSN1944-8244
    DOIs
    Publication statusPublished - 2017

    Keywords

    • aqueous salt-polymer solutions
    • carbonization
    • centrifugal spinning
    • fabrication
    • graphene
    • nanofibers

    Cite this

    Akia, M., Cremar, L., Chipara, M., Munoz, E., Cortez, H., de Santiago, H., ... Lozano, K. (2017). In Situ Production of Graphene-Fiber Hybrid Structures. A C S Applied Materials and Interfaces, 9(30), 25474-25480. https://doi.org/10.1021/acsami.7b07509