Radiation synthesis and characterization of N-vinyl-2-pyrrolidone/N-allylthiourea hydrogels and their use in the adsorption of invertase

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Sen M., Pekel N., Guven O.

ANGEWANDTE MAKROMOLEKULARE CHEMIE, cilt.257, ss.1-6, 1998 (SCI-Expanded, Scopus)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 257
  • Basım Tarihi: 1998
  • Dergi Adı: ANGEWANDTE MAKROMOLEKULARE CHEMIE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1-6
  • Hacettepe Üniversitesi Adresli: Evet

Özet

N-Vinyl-2-pyrrolidone/N-allylthiourea (VP/ATU) copolymeric hydrogels were prepared by gamma-irradiating ternary mixtures of VP/ATU/water. The influence of the ATU on the gelation of VP, on the network structure and on the adsorption of invertase was investigated. VP/ATU copolymeric hydrogels were found to swell in the range of 950-2500%. The water diffusion to the hydrogels is a non-Fickian type diffusion and the diffusion coefficients varied from 15.4.10(-8) to 1.5.10(-8) m(2) s(-1). The adsorption capacity of the hydrogels was found to increase from 8.0 to 380.0 mu g invertase/g dry gel with increasing amount of ATU, and loss in activity with adsorption is approximately threefold.

N-Vinyl-2-pyrrolidone/N-allylthiourea (VP/ATU) copolymeric hydrogels were prepared by gamma-irradiating ternary mixtures of VP/ATU/water. The influence of the ATU on the gelation of VP, on the network structure and on the adsorption of invertase was investigated. VP/ATU copolymeric hydrogels were found to swell in the range of 950-2500%. The water diffusion to the hydrogels is a non-Fickian type diffusion and the diffusion coefficients varied from 15.4.10(-8) to 1.5.10(-8) m(2) s(-1). The adsorption capacity of the hydrogels was found to increase from 8.0 to 380.0 mu g invertase/g dry gel with increasing amount of ATU, and loss in activity with adsorption is approximately threefold.