VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • The effect of pressure and temperature on supecritical CO2 dyeing of PES - dyeing with mixtures of dyes
    Tušek, Lidija ; Golob, Vera, 1954-2005 ; Knez, Željko
    Dyeing in supercritical CO2 is one of the most advanced dyeing technologies. The dyeing medium is not water but carbon dioxide in the supercritical state (temperatures above 31oC and pressure above ... 74 bar). The effect of pressure and temperature on dyeing of PES in supercritical CO2 with only one dye and with mixtures of two or three dyes has been investigated. The variations of pressure (250 and 300 bar) and temperatures (70 and 130 oC) cause differences in colour, especially when mixtures of dyes are used. The dyed samples were evaluated using colorimetry and extraction of dyes from the fabric. The amountof all dyes on the fabric rises with the rising temperature due to the accelerated motion of molecular chains and the formation of the free volume in the fibre, so important for the diffusion of dyes. The change of pressure does not alter the amount of fixed dyes significantly, but the ratio between the dyes is changed when dyeing with mixtures of dyes.
    Vir: Proceedings of lectures and posters (Str. 186-192)
    Vrsta gradiva - prispevek na konferenci
    Leto - 1998
    Jezik - angleški
    COBISS.SI-ID - 3979798

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