Micro-rheological and micro-heterogeneity properties of soluble glutinous rice starch (SGRS) solutions studied by diffusing wave spectroscopy (DWS)

被引:3
作者
Xu, Jingyuan [1 ]
Liu, Sean X. [1 ]
Boddu, Veera M. [1 ]
机构
[1] ARS, Natl Ctr Agr Utilizat Res, USDA, 1815 North Univ St, Peoria, IL 61604 USA
关键词
Diffusing wave spectroscopy (DWS); Micro-rheology; Soluble rice starch; CONCENTRATED ISOTROPIC SOLUTIONS; SEMIFLEXIBLE POLYMERS; VISCOELASTIC MODULI; MICRORHEOLOGY;
D O I
10.1007/s11694-019-00202-8
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
As a natural biopolymer, soluble glutinous rice starch (SGRS) is widely used in the food industry; and has better binding characteristics than dextrin. The micro-structural heterogeneity and micro-rheology of SGRS solutions were investigated by the novel technique diffusion wave spectroscopy (DWS). By comparing the mean-square displacement (MSD) of the microbeads imbedded in six concentrations of SGRS solutions, we found that the solutions exhibited nearly homogeneous behavior at <= 0.5%, but the material displayed a clear degree of heterogeneity at > 1%. Micro-rheology investigation revealed that SGRS solutions showed nearly perfect viscous behavior at <= 0.5%, but the property changed into viscoelastic one at > 1%. The magnitude of high-frequency viscoelastic moduli for the 3-5% SGRS solutions can be characterized by (vertical bar G*vertical bar) proportional to omega(3/4), which is the semi-flexible polymer behavior. However, the magnitude of high-frequency viscoelastic moduli (vertical bar G*vertical bar) for the 7-10% SGRS solutions is proportional to omega(1/2), which is the flexible polymer behavior. All micro-structural heterogeneity and micro-rheological property shifts occurred in relatively small concentration ranges.
引用
收藏
页码:2822 / 2827
页数:6
相关论文
共 25 条
  • [1] Doi M., 1986, THEORY POLYM DYNAMIC
  • [2] Ferry J. D., 1980, VISCOELASTIC PROPERT
  • [3] Microscopic viscoelasticity: Shear moduli of soft materials determined from thermal fluctuations
    Gittes, F
    Schnurr, B
    Olmsted, PD
    MacKintosh, FC
    Schmidt, CF
    [J]. PHYSICAL REVIEW LETTERS, 1997, 79 (17) : 3286 - 3289
  • [4] Glittenberg D., 2012, Polymer Science: A Comprehensive Reference, P165, DOI DOI 10.1016/B978-0-444-53349-4.00258-2
  • [5] The physicochemical properties of a spray dried glutinous rice starch biopolymer
    Laovachirasuwan, Pornpun
    Peerapattana, Jomjai
    Srijesdaruk, Voranuch
    Chitropas, Padungkwan
    Otsuka, Makoto
    [J]. COLLOIDS AND SURFACES B-BIOINTERFACES, 2010, 78 (01) : 30 - 35
  • [6] MULTIPLE LIGHT-SCATTERING FROM DISORDERED MEDIA - THE EFFECT OF BROWNIAN-MOTION OF SCATTERERS
    MARET, G
    WOLF, PE
    [J]. ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1987, 65 (04): : 409 - 413
  • [7] Estimating the viscoelastic moduli of complex fluids using the generalized Stokes-Einstein equation
    Mason, TG
    [J]. RHEOLOGICA ACTA, 2000, 39 (04) : 371 - 378
  • [8] OPTICAL MEASUREMENTS OF FREQUENCY-DEPENDENT LINEAR VISCOELASTIC MODULI OF COMPLEX FLUIDS
    MASON, TG
    WEITZ, DA
    [J]. PHYSICAL REVIEW LETTERS, 1995, 74 (07) : 1250 - 1253
  • [9] The Colloidal Behavior of Pectin Containing Water in Oil Emulsions as a Function of Emulsifier Concentration
    Massel, Valerie
    Alexander, Marcela
    Corredig, Milena
    [J]. FOOD BIOPHYSICS, 2015, 10 (01) : 57 - 65
  • [10] Viscoelasticity of concentrated isotropic solutions of semiflexible polymers. 2. Linear response
    Morse, DC
    [J]. MACROMOLECULES, 1998, 31 (20) : 7044 - 7067