Adsorption of Congo Red on Viscose Fibres

49-50<span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:arial;mso-ansi-language:en-us;mso-fareast-language:="" en-us;mso-bidi-language:ar-sa"="">The adsorption and rate of dyeing of the highly aggregate anionic dye Congo Red on viscose fibres in the presence of water structure breaking electrolyte cations parallel almost quantitatively those of a monodisperse anionic dye, giving more evidence for the existence of a complex equilibrium between mobile dye aggregates in solution mobile single dye ions and adsorbed single dye ions.</span

An insight into the mechanism of the cellulose dyeing process, part 2: Simulation of aggregation, solvent and additive effects upon azo-linked aromatics and dyes

In order to probe the complex process of dying cellulosic materials with common azo- linked dye systems, the aggregation-disaggregation process has been studied using molecular simulation techniques. In particular, the dynamics of multiple dye species in both gaseous and aqueous environments have been examined by molecular modeling methods, with emphasis upon the effects of urea upon these species in aqueous solutions. Such simulation techniques can demonstrate the natural drive for dye molecules to aggregate in solution and compare well with those results obtained from spectroscopic results. In addition, molecular modeling does predict that urea tends to cause disaggregation, by breaking up dye clusters; this also closely follows literature prediction and practical predictions