title: The effect of NaCl on the rheological properties of suspension containing spray dried starch nanoparticles.
abstract: The effect of NaCl on the rheological properties of suspensions containing spray dried starch nanoparticles produced through high pressure homogenization and emulsion cross-linking technique was studied. Rheological properties such as continuous shear viscosity, viscoelasticity and creep-recovery were measured. NaCl (5-20%, w/w) was found to lower viscosity quite significantly (p<0.05), enhance the heat stability and weaken their gelling behavior compared to starch-only suspension. NaCl reduced both the storage and loss moduli of suspension within the frequency range (0.1-10 rads/s) studied. However, NaCl brought higher speed of reduction on the storage modulus than on the loss modulus, which resulted into large increase in loss angle. The creep-recovery behavior of suspension was affected by NaCl and the recovery rate was highest (86%) at 15% NaCl. The Cross, the Power law and the Burger's models followed the experimental viscosity, storage and loss moduli, and creep-recovery data well with R(2)>0.97.
authors.affiliation: College of Engineering, China Agricultural University, P.O. Box 50, 17 Qinghua Donglu, Beijing 100083, China.
authors.forename: Ai-min
authors.initials: AM
authors.lastname: Shi
authors.forename: Dong
authors.initials: D
authors.lastname: Li
authors.forename: Li-jun
authors.initials: LJ
authors.lastname: Wang
authors.forename: Benu
authors.initials: B
authors.lastname: Adhikari
mesh_terms: D003432:Cross-Linking Reagents / Q000494:pharmacology; D053758:Nanoparticles; D012212:Rheology / Q000187:drug effects*; D012965:Sodium Chloride / Q000494:pharmacology*; D013213:Starch / Q000737:chemistry*; D013535:Suspensions; D014783:Viscosity
chemical_list: D003432:Cross-Linking Reagents; D013535:Suspensions; D012965:Sodium Chloride; D013213:Starch