Supercritical fluid dyeing of synthetic and natural textiles – a review

Abstract

Supercritical fluid dyeing is an interesting alternative to the conventional aqueous process because of its environmental benefits. The aim of the paper is to provide the reader with an up‐to‐date overview of this subject, covering various aspects, such as the solubility and equilibrium partitioning of the dyes, mass transfer phenomena and solvent–polymer interactions occurring during coloration, up to the most recent reports on the technology of the dyeing process. Even though the best results have been obtained in the coloration of synthetic textiles, particular attention is given to the dyeing of natural textiles, which is, at the moment, the limiting step of this technology.

Drug loading of polymer implants by supercritical CO 2 assisted impregnation: A review

“…Bach et al and more recently Banchero reviewed the studies applying the scCO 2 impregnation process to the dyeing of synthetic and natural textiles [13,14]. The reviews mainly focus on the dyeing of PET and give an interesting overview of the phenomena occurring during this process.…”

In situ investigation of supercritical CO2 assisted impregnation of drugs into a polymer by high pressure FTIR micro-spectroscopy

“…Fluorescent dyes have been loaded into polymer optical fibers 9 , dyes into textiles 10 , monomers into polymeric matrix for polymer blending 11,12 , and bioactive molecules into biocompatible polymeric device for the biomedical field 13, 14 . In the literature, a large part of the studied systems has implied thin polymeric films or fibers (50 -1000 µm) [15][16][17][18][19][20][21] Various techniques are implemented in the literature to study the thermodynamic behavior of such impregnation systems. Gravimetric technics 16,17 are the simplest and the main technics used to determine the quantity of CO 2 sorbed and the amount of solute loaded into the polymer.…”

Eco-Friendly Disperse Dyeing and Functional Finishing of Nylon 6 Using Supercritical Carbon Dioxide

“…The washing fastness rating of the dyed nylon 6 fabric under supercritical medium was excellent for both fading and staining with ratings ranging from 4 to 5, while those of exhaustion dyeing were excellent for staining and ranged from moderate to excellent for fading (2)(3)(4)(5). This result is probably due the high affinity of the colored hydrazonopropanenitrile dyes for nylon 6 fibers.…”

“…This dyeing method offers many advantages compared with conventional aqueous dyeing; no carrier or dispersing agent is required, residual dyestuff can be collected and carbon dioxide can be recycled [1][2][3]. It is an environmentally friendly technique, as it may replace the traditional wet-dyeing method [4].…”