Swelling of iota-carrageenan gels prepared with various CaCl2 content: A fluorescence study
Yükleniyor...
Dosyalar
Tarih
2008-01-05
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
European Polymer Federation
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Iota carrageenan gels prepared with various CaCl2 content were completely dried and then swelled in water vapor. Steady-state fluorescence ( SSF) technique was used to monitor the swelling process of each iota carrageenan gels at various temperatures. Pyranine was used as a fluorescence probe. Apparent fluorescence intensity, I increased as swelling time increased for all gel samples. The increase in I was modelled using Li-Tanaka equation from which the swelling time constants, tau(1) and cooperative diffusion coefficients, D-c were determined. It was observed that D-c increased as the swelling temperature was increased. On the other hand at each temperature, it was seen that D-c decreased as CaCl2 content was increased. Activation energies for swelling were obtained and found to be 60.5, 61.0, 61.5 and 62.8 kJmol(-1) for the gels prepared with increasing amount of CaCl2 content.
Açıklama
Anahtar Kelimeler
Dynamicspoly(methyl methacrylate) gels, Photon transmission, Kinetics, Transition, Shrinking, Dynamics, Activation energy, Diffusion, Lithium, Swelling, Iota-carrageenan gels, Li-Tanaka equation, Steady-state fluorescence (SSF) technique, Calcium chloride
Kaynak
E-Polymers
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
8
Sayı
1
Künye
Tarı İlgin, Ö. & Pekcan, M. Ö. (2008). Swelling of iota-carrageenan gels prepared with various CaCl2 content: A fluorescence study. E-Polymers, 8(1), 1-10. doi:10.1515/epoly.2008.8.1.1
