title: Rheological properties and fractal structure of concentrated polyion complexes of chitosan and alginate.
abstract: Rheological properties and fractal structure of the polyion complex between chitosan and alginate have been studied using IR spectra, dynamic viscoelasticity and SAXS measurements. The complexation seems to occur between a carboxyl anion of the alginate and an amino group of the chitosan. The complex develops most markedly at a mixing ratio in weight of the chitosan/alginate from ca. 1/1 to 1/2 (in molar ratio), at which the dynamic viscoelastic functions of the systems manifest a plateau region due to a heterogeneous structure at a low frequency range. The heterogeneous structure shows a surface fractal structure having a fractal dimension of ca. 2.4.
authors.affiliation: Division of Material Chemistry, Kyoto University, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Matsumoto
authors.forename: M
authors.initials: M
authors.lastname: Kawai
authors.forename: T
authors.initials: T
authors.lastname: Masuda
mesh_terms: D000464:Alginates / Q000737:chemistry*; D000924:Anticholesteremic Agents / Q000737:chemistry*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002686:Chitin / Q000031:analogs & derivatives* / Q000737:chemistry; D048271:Chitosan; D004548:Elasticity; D017709:Fractals; D020723:Glucuronic Acid; D006490:Hemostatics / Q000737:chemistry*; D006603:Hexuronic Acids; D012212:Rheology; D017550:Spectroscopy, Fourier Transform Infrared; D014783:Viscosity
chemical_list: D000464:Alginates; D000924:Anticholesteremic Agents; D006490:Hemostatics; D006603:Hexuronic Acids; D002686:Chitin; D020723:Glucuronic Acid; D048271:Chitosan