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| Titel: |
The Effect of Pressure and Temperature on Supercritical CO2 Dyeing of PET-Dyeing with Mixtures of Dyes |
| Auteur: |
Tusek, L. Golob, V. Knez, Z |
| Verschenen in: |
International journal of polymeric materials |
| Paginering: | Jaargang 47 (2000) nr. 4 pagina's 657-665 |
| Jaar: |
2000-10-01 |
| Inhoud: |
Dyeing is 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 31°C and pressures above 74 bar). The effect of pressure and temperature on dyeing of PET in supercritical CO2 with only one dye and with mixtures of two or three dyes has been investigated. The variations of pressure (250 in 300 bar) and temperature (70 in 130°C) cause differences in colour, especially when mixtures of dyes are used. The dyed samples were evaluated using colorimetry and the extraction of dyes from the fabric. The amount of 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 after the amount of fixed dyes significantly, but the ratio between the dyes is changed when dyeing with mixtures of dyes. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 20 van 24 gevonden artikelen
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