Acid dyeing isotherms of cotton fabrics pretreated with mixtures of reactive cationic agents

Authors: Reda M El-Shishtawy; Y A Youssef; Nahed S E Ahmed; A A Mousa

Source: Coloration Technology, Volume 120, Number 4, 2004 , pp. 195-200(6)

Publisher: Society of Dyers and Colourists

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Abstract:

Reactive cationic agents, phenylmonochlorotriazinyl and epoxypropyl, are used for cotton pretreatment using a pad–dry–curing technique. The dyeability of cationised cotton fabrics using CI Acid Red 1, determined spectrophotometrically for the residual dyebath, has been dependent on the cationic agent concentration and the appropriate mixture used. Comparative sorption isotherms, rate of dyeing at different temperatures, standard affinity, entropy and heat of dyeing for three different pretreated fabrics have been calculated and discussed. The equilibrium data obtained were fitted by the Langmuir isotherm model, allowing the corresponding sorption parameters to be determined. Received: 16 January 2004; Accepted: 7 May 2004.

Document Type: Regular paper

Affiliations: 1: Textile Research Division, National Research Centre, El-Behouth St., Dokki, Cairo PO 12622, Egypt. : elshishtawy@hotmail.com

Publication date: 2004-01-01

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