首页|Spectroscopic evidence of successful in situ insertion of sol-gel silica in a poly(3-hydroxybutyrate) matrix
Spectroscopic evidence of successful in situ insertion of sol-gel silica in a poly(3-hydroxybutyrate) matrix
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NSTL
Sage
Silica-based (SiO2) poly(3-hydroxybutyrate) (PHB) nanocomposites were obtained via an in situ sol-gel route in three distinct particle concentrations (1, 5, and 7.5% by weight of PHB). The polymer hybrids formed were analyzed via wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), Fourier transform infrared (FTIR) spectroscopy, and time-domain nuclear magnetic resonance relaxometry (TD-NMR). The SiO(2)inorganic structure displayed surface fractal features at low concentration (1 wt%) and denser agglomerates at higher concentrations (5 and 7.5 wt%). FTIR and SAXS results confirmed the formation of the inorganic matrix amid the polymer chains with different levels of distribution and organization. WAXD and TD-NMR results suggested the SiO(2)influence on the PHB crystallinity degree, which was reflected on the polymer's molecular dynamics with a nonlinear dependence of particles concentration in the PHB matrix.
Rodrigues, Elton Jorge da Rocha、Cavalcante, Maxwell de Paula、Dutra Filho, Jose Carlos、Tavares, Maria Ines Bruno、Martinez Martinez Toledo, Anna Lecticia
NSTL
Sage
