Viscoelastic properties of alginate aqueous solutions in the presence of salts | Zendy

Matsumoto Takayoshi | Zendy; Mashiko Kimio | Zendy

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Viscoelastic properties of alginate aqueous solutions in the presence of salts

Author(s) -

Matsumoto Takayoshi,

Mashiko Kimio

Publication year - 1990

Publication title -

biopolymers

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.556

H-Index - 125

eISSN - 1097-0282

pISSN - 0006-3525

DOI - 10.1002/bip.360291404

Subject(s) - aqueous solution , chemistry , viscoelasticity , rheology , salt (chemistry) , relaxation (psychology) , plateau (mathematics) , moduli , ion , thermodynamics , chemical engineering , inorganic chemistry , polymer chemistry , organic chemistry , psychology , social psychology , mathematical analysis , physics , mathematics , quantum mechanics , engineering

The influence of added salts on the dynamic viscoelastic properties are investigated for aqueous solutions of alginates that have various molecular weights and mannuronate/guluronate (M/G) ratios. The dynamic moduli of the systems increase with increasing concentration of the added salt in the low‐frequency region. The effect is notable in the order of KCl < NaCl < MgCl 2 ≪ CaCl 2 . The values of the dynamic moduli in the rubbery plateau are independent of the addition of the salts, irrespective of the M/G ratio of the alginate. These facts strongly suggest that the structure that is formed by the interaction between the alginates and the metal ions does not work as cross‐linking points but as heterogeneous relaxation units having a relatively long relaxation time from a rheological viewpoint.

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