Fractal dimensions of kappa-carrageenan gels during gelation and swelling
Küçük Resim Yok
Tarih
2018
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Taylor & Francıs Inc
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
A photon scattering technique for research on the sol-gel and gel-sol transitions in kappa-carrageenan-water systems with various carrageenan contents (CC) was utilized for characterizing the fractal dimensions during gelation and swelling. It was observed that the scattered photon intensity, I-sc, increased at all temperatures with an increase in the CC when I-sc was monitored against temperature. Additionally, the sol-gel transition temperatures were found to be much lower than the gel-sol transition temperatures, causing hysteresis of the phase transition loops. I-sc increased with an increase in CC at all test temperatures, which is attributed to the formation of a fractal-like carrageenan gel. After drying, the gels were used in swelling experiments where the gels were immersed in water at room temperature, reswelling to the original structure. It was observed that I-sc from the carrageenan gels increased as the CC was increased. The fractal dimension, d, during gelation was found to increase as the gelation temperature was increased. On the other hand, the d values during swelling decreased as the swelling time was increased.
Açıklama
Anahtar Kelimeler
Kappa-Carrageenan Gel, Fractal Dimension, Gel Swelling, Gel-sol Transition, Hysteresis, Photon Scattering Technique, Sol-Gel, Scatterıng, Aggregatıon, Kınetıcs
Kaynak
Journal of Macromolecular Scıence Part B-Physıcs
WoS Q Değeri
Q3
Scopus Q Değeri
N/A
Cilt
57
Sayı
11-12
