Pretreatment of Cotton Fibres with Alcohols to Optimize Dye Uptake

Cotton fibres were subjected to cleaning process and then characterized for maturity. Decrystallisation and swelling processes with caustic soda, ethanol, propan-۲-ol and Trichloroethene on the native fibres were carried out. The effects of these on the strength and moisture regain were investigated. The activation energies of the dyeings were also analysed with Durazol Scarlet Red ۴ BAS. The results indicated that unlike the traditional scouring/bleaching processes the use of these reagents did not lead to adverse loss in strength. The moisture regain values also appreciated above the control indicating swelling, which might have resulted from decrystallization. The reduction of the activation energy as a result of the pretreatments confirmed the assertion. The performance of propan-۲-ol was phenomenal. It suffices to say that propan-۲-ol could replace the caustic soda kiering process with its attendant environmental hazards and often-difficult recycling procedure.   REFERENCES Balcerzyk, E., Kazlowski, W. and Wlodarski, G. (۱۹۶۹) Thermokinetics of Cellulose Fiber Penetration by Physically and Chemically Reactive Liquids and Structure of Accessible Regions. Text. Res. J., ۳۹, ۶۶۶-۶۶۷. D’Silva, A.P., Harrison G., Harrocs, A.R. and Rhodes, D. (۲۰۰۰a) Investigation into Cotton Fibre Morphology Part II: Effect of Scouring and Bleaching Treatments on Absorption. J. Text. Inst. ۹۱, ۱۰۷-۱۲۲. D’Silva, A.P., Harrison, G., Harrocs, A.R. and Rhodes, D. (۲۰۰۰b) Investigation into Cotton Fibre Morphology Part III: Effect of Alcohol Treatment on Water Absorption. J. Text. Inst. ۹۱, ۱۲۳-۱۳۱. Daruwalla E. H and D’Silva A. P (۱۹۶۳) Heats of Dyeing of Direct Cotton Dyes on Cellulose a new Thermodynamic Approach to the Determination of Activity of Direct Dyes in Cellulose. Text. Res. J. ۳۳: ۴۰-۵۱. Everett, D. H. and Stone, F. S. (۱۹۵۸) The structure and properties of porous materials, Butterworths, London, UK. pp. ۲۳-۸۷. Koshimo, A. and Kakishita, T. (۱۹۶۵) Steam and Heat Setting of Nylon ۶ Fiber X. Effect of Heat Setting on Diffusion of Dyestuff into Nylon ۶ fiber. J. Appl. Polym. Sci. ۹, ۹۱. Lemin, D. R. and Vickerstaff, T. (۱۹۴۷) The Measurement of the Affinity of Monobasic Acid Dyes for Wool. J. Soc. Dyers and Col. ۶۳, ۴۰۵. Porter, B. R. and Rollins, M. L. (۱۹۷۲) Changes in Porosity of Treated Lint Cotton Fibers ۴۴ Pretreatment of cotton fibres I. Purification and Swelling Treatments. J. Appl. Polym. Sci. ۱۶, ۲۱۷-۲۳۶. Rowland, S. P. and Bertoniere, N. R. (۱۹۸۵) Chemical methods of studying supramolecular structure in cellulose chemistry and its application. Ellis Harwood, Chichester, West Sussex, UK pp ۱۱۲-۱۳۷. Sivaraja Iyer S. R. (۱۹۷۴) Physical Chemistry of Dyeing: Kinetics, Equilibrium, Dye-Fiber Affinity and Mechanism. The Chemistry of Synthetic Dyes (ed. by Venkataraman K.) Vol. ۷, pp. ۱۱۵-۱۹۱, Academic Press, New York, San Francisco, London Tsurata, M. and Koshimo, A. (۱۹۶۵) Steam and Heat Setting of Nylon ۶ Fiber I. Effect of Dry Heat Setting and Steam Setting on Young’s Modulus and Specific Gravity of Nylon ۶ Fiber. J. Appl. Polym. Sci. ۹, ۳ Warwicker J. O, Jeffries R, Colbran R.L and Robinson, R. N (۱۹۶۶) A Review of the Literature on the Effect of Caustic Soda and other Swelling Agents on the Fine Structure of Cotton (Shirley Institute Pamphlet No. ۹۳) Shirley Institute, Manchester, U.K.

کلیدواژه ها:

Activation Energy ، Decrystallization ، Diffusion ، Swelling agents