Journal Title : International Journal of Modern Trends in Engineering and Science


Author’s Name : Beyene Dumecha | Nalankilli G

Volume 04 Issue 09 2017

ISSN no:  2348-3121

Page no: 3-14

Abstract – Polyester fibre, semi-crystalline fibrer is hydrophobic owing to the lack of any hydrophilic groups in its structure. It is necessary to impart desired properties by introducing specific functional groups on the surface of the fiber to make it more practically useful. Alkali and amine treatment with caustic soda and ethylene diamine, respectively were studied in the present work for surface modification. Dyeing of the treated samples with anionic dyes such as reactive dye, acid dye and vat dye as well as disperse dye for a comparison purpose was also studied. Aminolysis reaction of Poly (ethylene terephthalate) (PET) fibers with ethylene diamine gives amino (~NH2) functional groups whereas hydrolysis by sodium hydroxide gives hydroxide (~OH) functional groups on the surface of the polyester fabric as observed by the Fourier Transform Infrared Spectroscopy (FTIR). The effects of temperature, reaction time, ethylene diamine and caustic soda concentration were studied in order to find out the conditions in which best results dyeing could be obtained. The dyeability of treated samples with reactive, acid and vat dye was observed to increase with temperature, reaction time, and reagents concentration at optimum conditions due to significant increase in number of reactive functional groups on the surface of the fiber and considerable decrease in glass transition temperature, Tg which was indicated by Differential Scanning Calorimetry (DSC). The colour strength (K/S) values of all anionic and disperse dyed samples were measured using spectrophotometer and compared with the control samples. There is also a significant improvement in fabric water wettability, hand and comfort ty with good fastness properties (wash, rubbing and light) due to these surface modifications, although there is loss in weight and tensile strength because of chain scission, as the reaction proceeds.

Keywords – Polyester, Reactive Dye, Vat Dye, Acid Dye, Anionic Dyes, FTIR, DSC, Dyeability, Surface Modification


  1. Adler M.M., W. W. K. (1984). “Mechanisms of Transient Moisture Transport Between Fabrics.” Textile Research Journal, 1984, Vol.54, No.5, pp 334- 343.
  2. Rebenfeld, Y. A. a. L. (1985). “Chemical Modification Of Polyester Fiber Surfaces By Amination Reactions With Multifunctional Amines.”, Journal of Applied Polymer Science,Vol.32, No.3, 1986, pp 4009–4025
  3. Dershowitz, A. A, “Dyes Containing Aliphatic Amino End Groups: An Approach to Reactive Dyes for Polyester Fibre via Transamidation”Israel Fibre Institute, Jerusalem, Journal of Applied Polymer Science, Vol.95, No.4, 1979, pp 143-147
  4. S. H. Zeronian . & Martha J. Collins B.S, “Surface Modification of Polyester by Alkaline Treatments.” Textile Progress, 2009, pp 1-26.
  5. Wei, Q. (2009). “Surface modification of textiles.” Wood head Publishing Limited and CRC Press LLC, 2009, pp.288.
  6. Mazeyar Parvinzadeh Gashti, J. W., “Surface and Bulk Modification of Synthetic Textiles to Improve Dyeability.” Textile Dyeing: Textile Dyeing, Prof. Peter Hauser (Ed.), ISBN: 978-953-307-565-975, 2011
  7. Chavan, M. G. R., “Catalyzation of Alkaline Hydrolysis of Polyester by Oxidizing Agents for Surface Modification.” Journal of Basic and Applied Science, Vol. 22, 2015, pp 232-252
  8. Ilaria Donelli, G. F., Vincent A. Nierstrasz, Paola Taddei, “Surface structure and properties of poly-(ethylene terephthalate) hydrolyzed by alkali and cutinase.” Department of Textiles, Ghent University, Technologies park 907, 9052 Gent, Belgium, 2010
  9. Jeyakodi Moses J., P. S., “A Study on the Dyeing of Sodium Hydroxide Treated Polyester / Cotton Blend Fabrics.” International Journal of Science and Technology Society, Vol.3, No.1, 2015, pp 1-9
  10. Smith, F. “Fashion Applications for Polyester Fiber, Particularly Hydrophilic Polyester.” Associate TS&D Specialist Dow Corning Corporation.,1996
  11. Latta, B. M., “Improved Tactile and Sorption Properties of Polyester Fabrics through Caustic Treatment” Florida International University, 2014.
  12. Zhaohui Wei, Z. G., “A study of one-bath alkali–amine hydrolysis and silk-fibroin finishing of polyester microfiber crepe fabric.” Tianjin Institute of Textile Science and Technology College of Chemical Engineering and Material Science, 2000.
  13. D. Lozano-Castello´ a, J. A. Cazorla-Amoro´s, “Isotropic and Anisotropic Microporosity Development Upon Chemical Activation of Carbon Fibers, Revealed by Microbeam Small-angle X-ray Scattering.” Institute of Experimental and Applied Physic, Universitat Kiel, Kiel, Germany, 2006.
  14. Erin Murphy Sanders, S. H. Z. (1982). “An analysis of the moisture-related properties of hydrolyzed polyester” Journal of Applied Polymer Science Vol. 27, No.9, 1982, pp 3349 – 33562.
  15. Loi.C Bech, T. M., Be´Ne´Dicte Lepoittevin,Philippe Roger , “Chemical surface modification of poly (ethylene terephthalate) fibers by aminolysis and grafting of carbohydrates” Universite´ Paris-Sud 11, 91405 Orsay Cedex, France.,2007
  16. Nagla S El-Shemy, N. S. “Basic and Reactive-Dyeable Polyester Fabrics Using Lipase Enzymes.” Dyeing, Printing, and Auxiliaries Department, National Research Centre, Tahrir St., Dokki, Cairo, Egypt, Journal of Chemical Engineering & Process Technology, Vol.7, No..1, 2016, pp2-5.
  17. Dara Ardeshir Jilla, C., Va., Dyeing Assistant Composition Containing Organic Amines and Carboxylic Acids For Coloring Polyester Material With Acid Dyes. U. S. Patent. USA, 1976.
  18. Graecia Lugito , L.-Y. W., Eamor M. Woo , “Chemical and Morphological Alterations Effected by Methylamine Reactions on Polyesters.” University Road, Taiwan, 2014.
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