Abstract
A NH(2)-POSS/SiO(2) composite was successfully synthesized using nanosilica as a surface dispersant in a one-step reaction. The structure and morphology of the NH(2)-POSS/SiO(2) composite were characterized using a suite of techniques, including (1)H NMR spectroscopy, Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), field-emission scanning electron microscopy (SEM), energy-dispersive X-ray (EDS) spectrometer mapping analysis, and solid-state (29)Si MAS NMR spectra analysis. To study the application of the NH(2)-POSS/SiO(2) composite in emulsions, it was incorporated into the acrylic emulsion to formulate the coating ((NH(2)-POSS/SiO(2))-SA coating). The results of the contact angle showed that the addition of the NH(2)-POSS/SiO(2) composite could effectively improve the hydrophobicity of the coating. The thermal performance of the (NH(2)-POSS/SiO(2))-SA coating was characterized using TG-IR analysis, and its thermal decomposition kinetics was further explored. The thermal decomposition occurs in two stages, each following a single-step reaction mechanism. The corresponding thermodynamic parameters for each stage are as follows: (i) E (α) = 177.50 kJ mol(-1), g(α) = [-ln-(1 - α)](4), A = 3.08 × 10(12) s(-1), and (ii) E (α) = 188.95 kJ mol(-1), g(α) = [-ln-(1 - α)]((2/3)), A = 1.21 × 10(7) s(-1).