VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Determination of encapsulated organic pigments by electron microscopy [Elektronski vir]
    Švara, Erika, kemik ...
    Facade paints are expected to preserve both the functionality and the estheticlook through long periods of time. Introduction of up-to-date components such as photocatalysts, which are used for ... self-cleaning effect of paints, generates problems due to poor compatibility of selected materials properties. It seems that the weakest link in self-cleaning paints is the degradation of organic pigments. In the present work a model organic pigment ß - copper phthalo cyanine was encapsulated by silicon dioxide via a sol gel process to obtain protection against the photocatalyst titanium dioxide. Such encapsulated organic pigments can then be used in photocatalytically active self cleaning decorative facade coatings. Due to pigment inertness and low dispersion ability in water media, cetyl trimethyl ammonium bromide (CTAB) wasused as the active surface agent. For preparation of the outer coating, potassium water glass was used as precursor. The active silica was provided byadding mineral acid to potassium water glass. The quality of encapsulation around pigment particles was determined by Field Emission Scanning Electron Microscopy (FE-SEM) and Transmission Electron Microscopy (TEM). It was found that TEM is an excellent method for detecting and monitoring the quality of protective nanodimensional layer SiO2 onto the surfaces of organic pigments.
    Vir: e-Proceedings with full papers [Elektronski vir] ([7] str.)
    Vrsta gradiva - prispevek na konferenci ; neleposlovje za odrasle
    Leto - 2011
    Jezik - angleški
    COBISS.SI-ID - 1784935

Vnos na polico