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Surface-coated fly ash reinforced biodegradable poly(vinyl alcohol) composite films: part 2-analysis and characterization |
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| Authors: | D.C.D. Nath J. Campbell D. Blackburn |
| Affiliation: | a School of Material Science and Engineering, The University of New South Wales, Kensington, Sydney, NSW 2052, Australia b School of Chemical Engineering, The University of New South Wales, Kensington, NSW, Australia c Research and Ash Development, Cement Australia, Brisbane, Queensland, Australia |
| 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. |
| Keywords: | Poly(vinyl alcohol) Surface-coated fly ash Sodium lauryl sulphate Composite film Tensile strength Interface |
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