VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Flame retardant activity of SiO[sub]2-coated regenerated cellulose fibres
    Hribernik, Silvo ...
    An alternative route to lower the flammability of viscose fibres is presented.Instead of adding a flame retardant to the viscose dope chemically, we have grown a layer of silica (SiO2) on the surface ... of a regenerated cellulose fibre via a sol-gel process. One set of samples was used as-received, while the other was pre-treated in an 18% NaOH solution, giving arough, etched surface to the fibre. The different surface morphology of both fibre types triggered a different growth of silica layers. On an untreated fibre, silica formed a 300-400 nm thick surface layer containing a high density of cracks and holes. Conversely, on a NaOH pre-treated fibre, the silica layer intruded into fibre interior, adhered more tightly to the fibre structure and formed an almost defect-free, thin (100 nm) layer on the outer fibre surface. This type of silica layer increased the temperature at which the fibre started to decompose by 20 °C. It also hindered significantly the flow of oxygen to the generated volatiles during the thermal decomposition, and increased the temperature of glowing combustion of the residual char; the temperature of the corresponding exothermic peaks increased by ca. 20 °C and 40 °C. In contrast, the thermal effects of silica coatings that grew on an untreated fibre were much smaller.
    Vir: Polymer degradation and stability. - ISSN 0141-3910 (Vol. 92, no. 11, 2007, str. 1957-1965)
    Vrsta gradiva - članek, sestavni del ; neleposlovje za odrasle
    Leto - 2007
    Jezik - angleški
    COBISS.SI-ID - 3823130
    DOI

vir: Polymer degradation and stability. - ISSN 0141-3910 (Vol. 92, no. 11, 2007, str. 1957-1965)
loading ...
loading ...
loading ...

Vnos na polico