Fish gelatin/Laponite biohybrid elastic coacervates: A complexation kinetics-structure relationship study
Fatemeh Karimi, Nader Taheri Qazvini, Rashin Namivandi-Zangeneh
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | ELSEVIER SCIENCE BV | Published : 2013
Complex coacervation in exfoliated Laponite nanoplatelets and fish gelatin mixtures was studied as a function of four key parameters: pH, ionic strength, gelatin/Laponite weight ratio, and total weight. The aim was to understand how these parameters influence phase separation kinetics, composition, internal structure, and viscoelastic properties of coacervates. By careful experimental design and turbidity measurements, the optimum conditions for coacervation were obtained. Thermogravimetric analysis revealed an outstanding heat-resistance for gelatin/nanoclay coacervates. Finally, structure of the coacervate phase was characterized by oscillatory shear experiments. The storage modulus data w..View full abstract
Partial financial support from the Iranian Nanotechnology Initiative and vice-president for research and technology of University of Tehran is gratefully appreciated. Zeta potential measurements were performed at the Laboratory of Food and Soft Materials, ETH Zurich, Switzerland. The authors also thank Ms. Barbora Ehrlichova for proofreading of the manuscript.