TY - JOUR
T1 - High strength bio-composite films of poly(vinyl alcohol) reinforced with chemically modified-fly ash
AU - Nath, Dilip Chandra Deb
AU - Bandyopadhyay, Sri
AU - Yu, Aibing
AU - Blackburn, Darryl
AU - White, Chris
PY - 2010/3
Y1 - 2010/3
N2 - Fly ash (FA) was chemically modified by activation with sodium hydroxide and used in fabrication of bio-composite films with poly(vinyl alcohol) (PVA) by aqueous casting method. The particle size distribution patterns of modified-fly ash (MFA) were shifted from 2-20 μm to the higher regions 2-40 μm in the analysis chart of Malvern Light Scattering Particle Size Analyser (MLSPSA). On the oxides based chemical analysis by X-ray Fluorescence Spectroscopy (XRF), the compositions of major oxides, SiO2 73.5%, Al2O 3 19.2% and Na2O 1.4% were significantly changed to SiO2 52.9%, Al2O3 23.6% and Na2O 5.9%, due to the dissolution and re-crystallisation of new phases which are characterised by X-ray diffraction (XRD). The composite film reinforced with 20 wt% MFA showed up to higher tensile strength 289% (three-fold) compared to those of unmodified FA filled films. The alkali treatment (sodium hydroxide) of FA is a very promising approach to improve the mechanical strength, and hence, further enhance the potential for recycling FA as a suitable filler material in bio-composite materials.
AB - Fly ash (FA) was chemically modified by activation with sodium hydroxide and used in fabrication of bio-composite films with poly(vinyl alcohol) (PVA) by aqueous casting method. The particle size distribution patterns of modified-fly ash (MFA) were shifted from 2-20 μm to the higher regions 2-40 μm in the analysis chart of Malvern Light Scattering Particle Size Analyser (MLSPSA). On the oxides based chemical analysis by X-ray Fluorescence Spectroscopy (XRF), the compositions of major oxides, SiO2 73.5%, Al2O 3 19.2% and Na2O 1.4% were significantly changed to SiO2 52.9%, Al2O3 23.6% and Na2O 5.9%, due to the dissolution and re-crystallisation of new phases which are characterised by X-ray diffraction (XRD). The composite film reinforced with 20 wt% MFA showed up to higher tensile strength 289% (three-fold) compared to those of unmodified FA filled films. The alkali treatment (sodium hydroxide) of FA is a very promising approach to improve the mechanical strength, and hence, further enhance the potential for recycling FA as a suitable filler material in bio-composite materials.
UR - https://www.scopus.com/pages/publications/76649130179
U2 - 10.1007/s10853-009-4091-6
DO - 10.1007/s10853-009-4091-6
M3 - 文章
AN - SCOPUS:76649130179
SN - 0022-2461
VL - 45
SP - 1354
EP - 1360
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 5
ER -