The effect of structural properties on rheological behaviour of starches in binary dimethyl sulfoxide-water solutions.
This research study analysed the rheological properties of potato amylose and potato amylopectin in binary solutions of the following water and dimethyl sulfoxide concentrations: 90% DMSO (1), 80% DMSO (2) and 50% DMSO (3), with preparation methodology involving the dissolution at the temperature of 98°C. The studies of dynamic light scattering on the biopolymer coils and the determination of main relaxation times of the solutions were carried out. For the amylose solutions, the fast relaxation phenomena are predominant. The results of the quality tests of the hysteresis loop showed, that the amylose solutions in the solvents (1) and (2) are rheologically stable and shear-thickened. The amylose solutions in solvents (3) reveal oscillatory alterations of viscosity in the time. Amylopectin solutions are characterized by 80% share of slow relaxation phenomena, very low diffusion coefficients and hydrodynamic radii in the range of 2000 nm. The amylopectin solutions are rheologically unstable.
Agriculture University in Krakow, Faculty of Food Technology, Department of Engineering and Machinery for Food Industry, ul. Balicka 122, Kraków, Poland.
Anna
http://orcid.org/0000-0002-2252-7650
A
Ptaszek
Agriculture University in Krakow, Faculty of Food Technology, Department of Engineering and Machinery for Food Industry, ul. Balicka 122, Kraków, Poland.
Paweł
P
Ptaszek
Technical University of Lodz, Faculty of Process and Environmental Engineering, Department of Chemical Engineering, ul. Wólczańska 175, Łódź, Poland.
Marek
M
Dziubiński
Institute of Chemical Engineering, Polish Academy of Science, ul. Bałtycka 5, Gliwice, Poland.
N Mirosław
NM
Grzesik
Agriculture University in Krakow, Faculty of Food Technology, Department of Engineering and Machinery for Food Industry, ul. Balicka 122, Kraków, Poland.
Marta
M
Liszka-Skoczylas
D000687:Amylopectin / Q000737:chemistry; D000688:Amylose / Q000737:chemistry; D004121:Dimethyl Sulfoxide; D000067493:Dynamic Light Scattering; D012212:Rheology; D011198:Solanum tuberosum / Q000737:chemistry; D012996:Solutions; D013213:Starch / Q000737:chemistry*; D014783:Viscosity; D014867:Water
D012996:Solutions; D014867:Water; D013213:Starch; D000688:Amylose; D000687:Amylopectin; D004121:Dimethyl Sulfoxide