Cellulose nanofibril film as a piezoelectric sensor material

Satu Rajala, Tuomo Siponkoski, Essi Sarlin, Marja Mettänen, Maija Vuoriluoto, Arno Pammo, Jari Juuti, Orlando J. Rojas, Sami Franssila, Sampo Tuukkanen

    Tutkimustuotos: ArtikkeliTieteellinenvertaisarvioitu

    246 Sitaatiot (Scopus)
    519 Lataukset (Pure)

    Abstrakti

    Self-standing films (45-μm thick) of native cellulose nanofibrils (CNF) were synthesized and characterized for their piezoelectric response. The surface and the microstructure of the films were evaluated with image-based analysis and scanning electron microscopy (SEM). The measured dielectric properties of the films at 1 kHz and 9.97 GHz indicated a relative permittivity of 3.47 and 3.38 and loss tangent tan δ of 0.011 and 0.071, respectively. The films were used as functional sensing layers in piezoelectric sensors with corresponding sensitivities of 4.7 to 6.4 pC/N in ambient conditions. This piezoelectric response is expected to increase remarkably upon film polarization resulting from the alignment of the cellulose crystalline regions in the film. The CNF sensor characteristics were compared with those of polyvinylidene fluoride (PVDF) as reference piezoelectric polymer. Overall, the results suggest that CNF is a suitable precursor material for disposable piezoelectric sensors, actuator or energy generators with potential applications in the fields of electronics, sensors and biomedical diagnostics.
    AlkuperäiskieliEnglanti
    Sivut15607–15614
    Sivumäärä8
    JulkaisuACS Applied Materials & Interfaces
    Vuosikerta8
    Numero24
    Varhainen verkossa julkaisun päivämäärä27 toukok. 2016
    DOI - pysyväislinkit
    TilaJulkaistu - 22 kesäk. 2016
    OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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