Radiation synthesis of poly(N-vinyl 2-pyrrolidone/itaconic acid) hydrogels and their controlled release behaviours


Creative Commons License

Sen M. , Guven O.

RADIATION PHYSICS AND CHEMISTRY, cilt.55, ss.113-120, 1999 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 55
  • Basım Tarihi: 1999
  • Doi Numarası: 10.1016/s0969-806x(98)00315-6
  • Dergi Adı: RADIATION PHYSICS AND CHEMISTRY
  • Sayfa Sayıları: ss.113-120

Özet

N-vinyl 2-pyrrolidone/itaconic acid copolymeric hydrogels were prepared by irradiating the ternary mixtures of N-vinyl 2-pyrrolidone/itaconic acid/water by gamma-rays at ambient temperature. For the characterization of network structure of these hydrogels, swelling properties in phosphate buffer solutions and molecular weight between crosslinks were investigated. Methylene Blue was used as a model drug for the investigation of controlled release behaviour of hydrogels. Specific Methylene Blue adsorption capacity of hydrogels are found to increase from 0.36 to 47.7 (mg MB/g gel) with increasing amount of itaconic acid in the gel system. The influence of molecular weight between cross-links, the concentration of ionizable groups, ionization and concentration of MB in the hydrogel were examined. The release studies show that one of the basic parameters affecting the drug release behaviour of hydrogels is the pH of the solution. (C) 1999 Elsevier Science Ltd. All rights reserved.

N-vinyl 2-pyrrolidone/itaconic acid copolymeric hydrogels were prepared by irradiating the ternary mixtures of N-vinyl 2-pyrrolidone/itaconic acid/water by γ-rays at ambient temperature. For the characterization of network structure of these hydrogels, swelling properties in phosphate buffer solutions and molecular weight between crosslinks were investigated. Methylene Blue was used as a model drug for the investigation of controlled release behaviour of hydrogels. Specific Methylene Blue adsorption capacity of hydrogels are found to increase from 0.36 to 47.7 (mg MB/g gel) with increasing amount of itaconic acid in the gel system. The influence of molecular weight between cross-links, the concentration of ionizable groups, ionization and concentration of MB in the hydrogel were examined. The release studies show that one of the basic parameters affecting the drug release behaviour of hydrogels is the pH of the solution.