Supercritical fluid dyeing of polycarbonate in carbon dioxide

Varga, Dániel and Alkin, Simon and Gluschitz, Peter and Péter-Szabó, Barbara and Kózelné Székely, Edit (2016) Supercritical fluid dyeing of polycarbonate in carbon dioxide. JOURNAL OF SUPERCRITICAL FLUIDS, 116. pp. 111-116. ISSN 0896-8446

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In this work, the applicability of the supercritical CO 2 dyeing process on polycarbonate pellets was inves- tigated by the use of two azo-disperse dyes; disperse red 1 (DR1) and disperse red 13 (DR13). Experiments were performed in the range of 100–300 bar and 40 ◦ C–60 ◦ C with 3–24 h of impregnation time. Dyeing took place in a high pressure vessel and kinetics was studied and explained. Impregnation efficiency on the polymer pellets was measured by UV–vis spectroscopy. The process was successfully applied and resulted in an entirely, equally deep-dyed polymer with excellent dyeing fixation. Arising from the different sol- ubility and chemical structure of the dyes, their sorption kinetics was found to be different. Maximal dye uptake obtained with DR1 and DR13 were 0.010 wt% and 0.055 wt% respectively, with respect to the mass of the polymer. New solubility data for DR13 in supercritical CO 2 has also been measured and partition coefficients ( K c ) for the dyes between the fluid and the polymer phase were calculated.

Item Type: Article
Subjects: Q Science / természettudomány > QD Chemistry / kémia
Depositing User: MTMT SWORD
Date Deposited: 16 Aug 2016 08:14
Last Modified: 16 Aug 2016 08:14

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