Thermal,
spectral and AFM studies of calcium silicate hydrate-polymer nanocomposite
material |
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Authors: | S C Mojumdar L Raki N Mathis K Schimdt S Lang |
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Institution: | (1) Institute for Research in Construction, National Research Council Canada, Ottawa, Canada, K1A 0R6, Ontario, M-20, 1200 Montreal Road;(2) Mathis Instruments Ltd., Fredericton, Canada, NB E3C 2N5, 21 Alison Blvd.;(3) Steacie Institute for Molecular Sciences, National Research Council, Ottawa, Canada, K1A OR6, Ontario |
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Abstract: | A non-ionic polymer (poly(vinyl
alcohol) (PVA)) has been incorporated into the inorganic layers of calcium
silicate hydrate (C–S–H) during precipitation of quasicrystalline
C–S–H from aqueous solution. C–S–H and a C–S–H-polymer
nanocomposite (C–S–HPN) material were synthesized and characterized
by X-ray fluorescence (XRF), energy dispersive spectroscopy (EDS), 29Si
magic angle spinning nuclear magnetic resonance (29Si
MAS NMR) and 13C cross-polarization nuclear magnetic
resonance (13C CP NMR) spectroscopy, atomic force
microscopy (AFM), thermal conductivity, thermogravimetric analysis (TG) and
differential thermal analysis (DTA). Thermal conductivity of PVA, C–S–H
and C–S–HPN material was studied in the temperature range 25–50°C.
C–S–HPN materials exhibited the highest thermal conductivity at
25 and 50°C. The thermal conductivity increases from 25 to 50°C are
7.03, 17.46 and 14.85% for PVA, C–S–H and C–S–HPN
material, respectively. Three significant decomposition temperature ranges
were observed on the TG curve of C–S–HPN material. |
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Keywords: | AFM C– S– H C– S– HPN nanocomposites DTA NMR spectroscopy PVA TG thermal conductivity |
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