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Transport Studies of Hydrogels Based on Natural Rubber and Polyethylene Oxide in Cationic Dye Solutions

Author Affiliations

  • 1School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills, Kottayam, 686560, Kerala, INDIA

Res. J. Recent Sci., Volume 3, Issue (ISC-2013), Pages 352-361, (2014)


Block copolymers (BCs) of varying compositions were prepared from hydroxyl terminated liquid natural rubber (HTNR) and polyethylene oxide (PEO) of various molecular weight.. The hydrophilic PEO enables these NR-b-PEO BCs to swell in water and in aqueous cationic dyes, viz., malachite green (MG), crystal violet (CV), safranineT (ST), methylene blue (MB) and bromocresol green (BCG). The diffusion and permeation coefficients of BCs increases with the PEO content. The swelling studies also point to the fact that the general order of interaction of the dyes with the BCs is MG > CV > ST > MB > BCG. The diffusional exponent value is Fickian in water and in dye solution for BC-1 and for the rest of the BCs it is of the anomalous type, with a bias towards the Fickian type. Hence it is inferred that the polymer relaxation rate is greater than the solvent diffusion rate in BC-1 during swelling whereas in the others, rate of polymer chain relaxation and the solvent diffusion rate are about the same order of magnitude.


  1. Sanghi R., Bhatttacharya B. and Singh V., Cassia angustifolia seed gum as an effective natural coagulant for decolourisation of dye solutions, Green Chem.,4, 252254 (2002)
  2. Namasivayam C., Arasi D.J.S.E. Removal of congo red from wastewater by adsorption onto waste red mud, Chemosphere,34, 401417 (1997)
  3. Moozyckine A.U., Davies D.M., Green S as a prototype for an environmentally-degradable dye: the concept of a green dye in future Green Chemistry, Green Chem.,4,452458, (2002)
  4. Akhtar S., Khan A.A. and Husain Q., Potential of immobilized bitter gourd (Momordica charantia) preoxidases in the decolourization and removal of textile dyes from polluted wastewater and dyeing effluent, Chemosphere,60, 291301 (2005)
  5. Crini G., Recent developments in polysaccharide-based materials used as adsorbents in wastewater treatment, Prog. Polym. Sci.,30, 3870 (2005)
  6. Senkal B.F. and Yavuz E., Preparation of poly (vinylpyrrolidone) grafted sulfonamide based polystyrene resin and its use for the removal of dye from water, Polym. Adv. Tech., 17, 928931 (2006)
  7. Hashem A., Abdel-Halim E.S., Socker H.H. Bi-functional starch composites prepared by gamma-irradiation for removal of anionic and cationic dyes from aqueous solutions, Polym. Plast. Tech. Eng., 46, 719 (2007)
  8. Ohmine I., Tanaka T. Salt effects on the phase transition of ionic gels, J. Chem. Phys., 77, 57255729 (1982)
  9. Katayama S., Hirokawa Y., Tanaka T. Reentrant phase transition in acrylamide-derivative copolymer gels,Macromolecules,17, 26412643 (1984)
  10. Sibel Duran, Dilek Solpan, Olgun Guven, Nucl. Instr. and Meth. In Phys. Res. B,151, 196-199 (1999)
  11. Gamze Guclu, Sibel Keles, J. of Appl. Polym. Sci.,106,2422-2426 (2007)
  12. Karadag E., Saraydin D. and Guven O. J. of Appl. Polym. Sci., 61, 2367-2372 (1996)
  13. Zhang L.M., Zhou Y.J., Wang Y. Novel hydrogel composite for the removal of water-soluble cationic dye, J. Chem. Tech. Biotech., 81, 799804 (2006)
  14. Ravindran T., Nair M.R.G., Francis D.J., J Appl Polym Sci, 35, 1227 (1988)
  15. Chandrasekharan Nair R. Block Copolymers from liquid natural rubber and polyether. Ph.D thesis, 1998, School of Chemical Sciences, Mahatma Gandhi University, Kottayam, Kerala, India (1998)
  16. Hadjichristdis N., Pispas N. and Floudas G., Block copolymers: Synthetic strategies, Physical Properties and Applications Wiley- Interscience (2003)