Piezoelectric property of hot pressed electrospun poly(γ -benzyl-α, L-glutamate) fibers

Kailiang Ren, William L. Wilson, James E. West, Qiming Zhang, S. Michael Yu

    Research output: Contribution to journalArticlepeer-review

    17 Scopus citations


    Since the 1960s, the piezoelectricity in biopolymers (e.g. proteins and polynucleotides) has attracted considerable scientific attention. In particular, poly(glutamate)s have been one of the most popular targets for this research due to their well-defined helical structure and permanent polarity along the helical axis. To date, films of poly(glutamate)s have been shown to exhibit piezoelectricity only in shear mode (d 14), mainly due to the limitation in fabricating electrically poled polymer samples. This paper describes a combined electrospinning and hot press method that allows production of poled poly(γ -benzyl-α,Lglutamate) (PBLG) films with piezoelectricity in all d 33, d 31 and d 14 modes for the first time. It is found that this PBLG film belongs to the matrix structure of C ∞v group, which is the same as that of poled PVDF film. The moderately high piezoelectric coefficients in both d 33 and d 14 modes as well as their thermal stability make the poled PBLG film an excellent candidate for use in flexible transducers and small energy harvesting devices.

    Original languageEnglish (US)
    Pages (from-to)639-646
    Number of pages8
    JournalApplied Physics A: Materials Science and Processing
    Issue number3
    StatePublished - Jun 1 2012

    All Science Journal Classification (ASJC) codes

    • Chemistry(all)
    • Materials Science(all)

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