Rheological and microstructural transitions in colloidal crystals
Journal Article
·
· Langmuir; (United States)
- Univ. of Illinois, Urbana, IL (United States)
- Oklahoma State Univ., Stillwater, OK (United States)
The flow of suspensions of 229-nm, charge-stabilized, polystyrene latex particles is directly linked with suspension microstructure. Transitions from long-range orientational order at rest to a steady-state, polycrystalline phase are associated with exceeding the dynamic yield stress. Application of stresses larger than a critical value nucleates a sliding layer microstructure which is accompanied by a discontinuous drop in suspension viscosity. Over a range of shear rates, polycrystalline and sliding layer microstructures coexist. At elevated shear rates, stresses and microstructures fluctuate in time. Shear thickening accompanies the complete loss of long-range orientational order. The transitions in rheology and microstructure are reversible except at very high shear rates where shear thickening accompanies irreversible flocculation. 48 refs., 20 figs., 1 tab.
- OSTI ID:
- 7178572
- Journal Information:
- Langmuir; (United States), Journal Name: Langmuir; (United States) Vol. 10:8; ISSN LANGD5; ISSN 0743-7463
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400201* -- Chemical & Physicochemical Properties
BARYONS
COLLOIDS
CREEP
CRYSTALS
DISPERSIONS
ELASTOMERS
ELECTRON MICROSCOPY
ELEMENTARY PARTICLES
FERMIONS
HADRONS
LATEX
MATERIALS
MECHANICAL PROPERTIES
MICROSCOPY
MICROSTRUCTURE
NEUTRONS
NUCLEONS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYMERS
POLYOLEFINS
POLYSTYRENE
POLYVINYLS
RHEOLOGY
RUBBERS
SCATTERING
SHEAR
SMALL ANGLE SCATTERING
STRESSES
SUSPENSIONS
SYNTHETIC MATERIALS
TRANSMISSION ELECTRON MICROSCOPY
VISCOSITY
400102 -- Chemical & Spectral Procedures
400201* -- Chemical & Physicochemical Properties
BARYONS
COLLOIDS
CREEP
CRYSTALS
DISPERSIONS
ELASTOMERS
ELECTRON MICROSCOPY
ELEMENTARY PARTICLES
FERMIONS
HADRONS
LATEX
MATERIALS
MECHANICAL PROPERTIES
MICROSCOPY
MICROSTRUCTURE
NEUTRONS
NUCLEONS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYMERS
POLYOLEFINS
POLYSTYRENE
POLYVINYLS
RHEOLOGY
RUBBERS
SCATTERING
SHEAR
SMALL ANGLE SCATTERING
STRESSES
SUSPENSIONS
SYNTHETIC MATERIALS
TRANSMISSION ELECTRON MICROSCOPY
VISCOSITY