Swelling behavior of poly(N-vinyl-2-pyrrolidone) and poly(N-vinyl-2-pyrrolidone)/K2S2O8 hydrogels in alpha-lactose solutions

Can H., Kavlak S., Kirci B., Guner A.

ADVANCES IN POLYMER TECHNOLOGY, vol.22, no.3, pp.252-259, 2003 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 22 Issue: 3
  • Publication Date: 2003
  • Doi Number: 10.1002/adv.10054
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.252-259
  • Hacettepe University Affiliated: No


Hydrogels with varying cross-linking densities, and average molecular weights between two consecutive cross-links, were prepared from the binary poly(N-vinyl-2-pyrrohdone)/water and ternary poly(N-vinyl-2-pyrrolidone)/water/K2S2O8 systems by irradiation withy gamma-rays at ambient temperature. Both hydrogel systems were employed for diffusion and swelling experiments in 0.00278 M alpha-lactose solution at room temperature. Diffusion of alpha-lactose solution into hydrogels was found to be of the Fickian type. The percent swelling, equilibrium swelling, initial rate of swelling, swelling rate of constant, equilibrium water/alpha-lactose content, and diffusion constant values were determined for PVP and PVP/K2S2O8 hydrogel systems in 0.00278 M alpha-lactose solution. (C) 2003 Wiley Periodicals, Inc.