Enhancement of the electromechanical behavior of IPMCs based on chitosan/polyaniline ion exchange membranes fabricated by freeze-drying

Seon Jeong Kim, Min Sup Kim, Su Ryon Shin, In Young Kim, Sun I. Kim, Sang Hoon Lee, Tae Soo Lee, Geoffrey M. Spinks

    Research output: Contribution to journalArticlepeer-review

    25 Citations (Scopus)

    Abstract

    The electromechanical behavior of an ionic polymer-metal composite (IPMC) based on a chitosan/polyaniline (CP) interpenetrating polymer network (IPN) is influenced by the internal structure of the CP ion exchange membrane. The freeze-drying method was found to be successful in improving the IPMC electromechanical properties. Scanning electron microscopy (SEM) observations indicated that the ion exchange membranes became more porous after freeze-drying. From swelling ratio and differential scanning calorimetry (DSC) measurements, the freeze-dried membranes exhibited a higher swelling ratio and increased free water content. Electron beam deposition was used to manufacture the IPMC metal electrodes. Experiments on the bending of IPMC samples in a direct current electric field showed that the freeze-dried samples had a faster and larger bending motion than non-freeze-dried samples.

    Original languageEnglish
    Pages (from-to)889-894
    Number of pages6
    JournalSmart Materials and Structures
    Volume14
    Issue number5
    DOIs
    Publication statusPublished - 2005 Oct 1

    ASJC Scopus subject areas

    • Signal Processing
    • Civil and Structural Engineering
    • Atomic and Molecular Physics, and Optics
    • General Materials Science
    • Condensed Matter Physics
    • Mechanics of Materials
    • Electrical and Electronic Engineering

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