High Solid Dispersion

Preface......Page 1
High Solid Dispersions
......Page 0
Contents......Page 4
From Polymers to Colloids: Engineering the Dynamic Properties of Hairy Particles......Page 5
1 Why Soft Colloids?......Page 6
2.1 Colloidal Star Polymers......Page 8
2.2 Block Copolymer Micelles......Page 10
2.3 Grafted Colloidal Particles......Page 11
2.4 Microgel Particles......Page 12
2.5 Selection of Model Systems......Page 14
3 Tuning the Softness: From Polymers to Hard Spheres......Page 15
4 Form, Structure and Diffusion Dynamics......Page 16
4.1 Comparing Different Systems......Page 17
4.2 Dynamics of Interacting Colloidal Star Polymers......Page 20
4.3 Dynamics of Core-Corona Systems: Block Copolymer Micelles and Grafted Particles......Page 25
4.4 Remarks on Crystallization......Page 31
5 Vitrification......Page 32
5.1 Soft Colloids in the Glassy State......Page 33
5.2 Signatures of Transitions and Rheology Manipulation......Page 35
6 Hybrid Systems and Other Emerging Applications......Page 40
7 Conclusions and Outlook......Page 47
References......Page 50
Nonlinear Rheological Properties of Dense Colloidal Dispersions Close to a Glass Transition Under Steady Shear......Page 59
1 Introduction......Page 61
2.1 Interacting Brownian Particles......Page 64
2.2.1 Generalized Green--Kubo Relations......Page 66
2.2.2 Aspects of Translational Invariance......Page 68
2.2.3 Coupling to Structural Relaxation......Page 72
2.2.4 Transient Density Correlator......Page 74
2.2.6 Mode-Coupling Closure......Page 75
2.4 Accounting for Hydrodynamic Interactions......Page 76
2.5 Comparison with Other MCT Inspired Approaches to Sheared Fluids......Page 77
3 Microscopic Results in Linear Response Regime......Page 78
3.1.1 MCT Equations and Results for Hard Spheres......Page 80
3.1.2 Comparison with Experiments......Page 84
3.2.1 Linear Order in......Page 85
3.2.2 Comparison with Simulations......Page 86
4 Universal Aspects of the Glass Transition in Steady Shear......Page 87
5.1.1 Definition of the ISHSM......Page 93
5.1.2 Transient Correlators......Page 94
5.1.3 Flow Curves......Page 97
5.2.1 Definition and Parameters......Page 99
5.2.2 Correlators and Stability Analysis......Page 101
5.2.3 Asymptotic Laws of Flow Curves......Page 103
5.2.4 Test of Asymptotics in a Polydisperse Dispersion......Page 106
6.1 ISHSM and Single Particle Motion Under Steady Shear......Page 108
6.2 F12()-Model and Shear Stresses in Equilibrium and Under Flow in a Polydisperse Dispersion......Page 111
6.3 F12()-Model and Flow Curves of a Simulated Supercooled Binary Liquid......Page 114
References......Page 117
Micromechanics of Soft Particle Glasses......Page 120
1 Introduction......Page 121
2.1.1 Colloidal-Like Particles......Page 123
2.1.2 Network Particles......Page 125
2.1.3 Polymer–Colloid Particles......Page 126
2.1.4 Liquid Dispersions: Emulsions, Vesicles, and Liposomes......Page 127
2.2 Origin of Particle Elasticity......Page 128
2.3 Phase Behavior of Soft Particle Dispersions: Suspensions and Glasses......Page 129
2.4 Interaction Pair Potential in the Dense State Limit......Page 131
3.1 Introduction......Page 134
3.2 Micromechanical Model......Page 135
3.3 Near-Equilibrium Radial Distribution Function......Page 137
3.4 Shear Moduli and Osmotic Pressure......Page 139
3.5 Comparison with Experimental Data......Page 141
4.1 Ubiquity of Wall Slip Phenomena in High-Solid Dispersions......Page 143
4.2.1 Slip Regimes......Page 144
4.2.2 Surface Rheology......Page 145
4.3.1 General Formalism and Slip Equations......Page 147
4.3.2 Case I: Elastohydrodynamic Slip......Page 149
5.1 Generic Properties of the Nonlinear Rheology of Soft Glasses......Page 151
5.2 Model Description......Page 154
5.3 Simulation Results......Page 156
6 Outlook and Open Questions......Page 158
References......Page 160
Quantitative Imaging of Concentrated Suspensions Under Flow......Page 165
1 Introduction......Page 166
2.1 The Colloidal Particles......Page 170
2.2 Imaging......Page 172
2.3 Flow Geometries......Page 175
3.1 General Methods......Page 180
3.2 Locating Particles......Page 181
3.3 Tracking Algorithms......Page 183
4 Imaging of Systems Under Deformation and Flow......Page 185
4.1 Disordered Systems......Page 186
4.2 Ordered Systems and Ordering Under Flow......Page 194
5 Conclusion and Outlook......Page 199
References......Page 200
Soft and Wet Materials: From Hydrogels to Biotissues......Page 205
1 General Introduction......Page 206
2.1 Optimized Structure for Tough DN Gels......Page 208
2.2 Necking and Hysteresis of Tough DN Gels......Page 211
2.3 Proposed DN Gel Toughening Mechanism: Local Damage Zone Models......Page 214
2.4 Structure of DN Gels Characterized by Small-Angle Neutral Scattering......Page 215
2.5 Tough DN Gels from Neutral Polymers......Page 216
3.1.1 Load Dependence......Page 218
3.1.2 Sample Area Dependence......Page 220
3.2 Proposed Gel Friction Mechanism: A Repulsion--Adsorption Model......Page 221
3.2.1 On a Smooth but Weakly Adhesive Substrate......Page 223
3.3.1 Gel Friction on Adhesive Surface......Page 225
3.3.2 Gel Friction on Repulsive Surface......Page 226
4.1 Friction Reduction by Template Effect......Page 227
4.2 Friction Reduction by Dangling Chains......Page 228
4.3 Friction Reduction by Dilute Polymer Solution......Page 230
4.4 Friction Reduction by Substrate Roughness......Page 231
5 Polymer Gels as Scaffolds for Cell Cultivation......Page 233
5.1 Cell Growth on Various Gels......Page 234
5.2 Effect of Charge on Cell Growth......Page 236
5.3 Cell Proliferation on Tough Gels......Page 237
6 Robust Gels with Low Friction: Excellent Candidates as Artificial Cartilage......Page 238
6.1 Wearing Properties of Robust DN Gels......Page 239
6.2 Robust Gels with Low Friction......Page 240
6.3 Biological Responses of DN Gels in Muscle and Subcutaneous Tissue......Page 242
References......Page 244