Surface-coated fly ash reinforced biodegradable poly (vinyl alcohol) composite films: part 2-analysis and characterization

D. C. D. Nath, Sri Bandyopadhyay, Jonathan Campbell, A. Yu, D. Blackburn, C White

    Research output: Contribution to journalArticlepeer-review

    11 Citations (Scopus)

    Abstract

    Composite films of poly(vinyl alcohol) (PVA) reinforced with 5, 10, 15, 20 and 25 wt.% surface-coated fly ash by surfactant, sodium lauryl sulphate (SLS-FA) along with 1 wt.% cross-linking agent, glutaraldehyde (GLA) were prepared by aqueous casting method. The tensile strengths of the composite films were increased proportionally with the addition of SLS-FA. The maximum 75% higher strength of the composite with 20 wt.% was achieved compared to that of neat PVA. The modulus of the composites was also increased proportionally with SLS-FA and the maximum 218% reached in composite with 20 wt.%, but the strain at break was decreased with addition of SLS-FA. Changes in FTIR spectra reflect the chemical and/or physical bonding in the ternary PVA, SLS-FA and GLA component systems. In the study of surface morphology, the connectivity was visualized in SEM images along with interstitial voids. The films with SLS-FA show 53% smoother surface calculated with AFM compared to unmodified FA composite films.

    Original languageEnglish
    Pages (from-to)1216-1221
    Number of pages6
    JournalApplied Surface Science
    Volume257
    Issue number4
    DOIs
    Publication statusPublished - 1 Dec 2010

    Keywords

    • Composite film
    • Interface
    • Poly(vinyl alcohol)
    • Sodium lauryl sulphate
    • Surface-coated fly ash
    • Tensile strength

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