Premium
Starch Phosphate Hydrogels. Part II: Rheological Characterization and Water Retention
Author(s) -
Passauer Lars,
Liebner Falk,
Fischer Klaus
Publication year - 2009
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.200900169
Subject(s) - self healing hydrogels , rheology , water retention , viscoelasticity , starch , phosphate , chemical engineering , succinic acid , chemistry , dynamic mechanical analysis , citric acid , viscosity , adipic acid , materials science , soil water , polymer chemistry , organic chemistry , composite material , polymer , environmental science , soil science , engineering
Hydrogels with different mechanical properties were synthesized by cross‐linking monostarch monophosphates (MSMP) with various di‐ and tricarboxylic acids (succinic, glutaric, adipic, citric, and maleic acid) by using a semi‐dry method. For a physical characterization water retention and rheological parameters (dynamic viscosity η*, storage and loss moduli G ′ and G ″) of the hydrogels were determined. Rheomechanical measurements revealed the viscoelasticity and mechanical sturdiness of the gels. Due to their special physical qualities MSMP hydrogels are not only suitable for different industrial applications but also have a big potential to be used as water storing soil amendments improving the efficiency of irrigation especially in arid regions. In order to investigate the suitability of MSMP hydrogels as water storing soil amendments the water retention curves of a sandy soil treated with different amounts of a selected starch phosphate hydrogel were determined.