Intrinsic and extrinsic factors of powders

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Table of contents

1 General introduction 
2 Literature Review 
2.1 Introduction
2.2 General information on granular material
2.3 Intrinsic and extrinsic factors of powders
2.3.1 Particle morphology
2.3.2 Particle surface roughness
2.3.3 Particle porosity
2.3.4 Particle size and size distribution
2.3.5 Particle surface chemical composition
2.3.6 Environmental conditions
2.3.7 Processing parameters
2.4 Particle interactions in granular media
2.5 Inter-particle forces between solid particles
2.5.1 Van der Waals forces
2.5.2 Capillary force
2.5.3 Electrostatic force
2.5.4 Gravity force
2.5.5 Relative importance of different forces
2.6 Techniques to measure powder flowability
2.7 The repose angle
2.8 Dynamic angle
2.9 Powder settlement and compressibility tests
2.10 Flow measurements through a fluidized bed
2.11 Flow measurement through an orifice
2.12 Flow measurement in shear cell
2.13 Rheological measurements
2.14 Conclusion
3 Influence of surface formulation and particles size on powder flowability 
3.1 Introduction
3.2 Powder surface formulations
3.3 Powder flowability based on different particle sizes and surface treatement
3.3.1 Introduction
3.3.2 Materials and methods
3.3.3 Results and discussion
3.3.4 Supplemental data
3.3.5 Conclusion
3.4 Surface hardness and elasticity of formulated powders
3.5 Concluding diagram
4 Comparison of different flow measurement techniques 
4.1 Introduction
4.2 Powder characterisation with Granutools equipement
4.2.1 Granutools methodology
4.2.2 Granutools measurement results and discussions
4.3 Powder characterization with the Discovery-HR3 Rheometer
4.3.1 Methodology
4.3.2 Newtonian and Frictional regimes
4.4 Powders behavior at a controlled temperature and humidity conditions
4.4.1 The powders flow behavior after 50 % humid control
4.4.2 Dynamic water sorption (DVS) of formulated powders
4.5 Conclusion .
5 Influence of humidity and water addition on powder behavior 
5.1 Introduction
5.2 The powder preparation and rheology protocol
5.3 Influence of a wide range of humidity on powder behavior
5.3.1 Comparison of influence of humidity on flowability of control glass bead with two different sizes
5.3.2 Influence of humidity on flowablity of hydrophobic glass beads
5.4 Powder flow behaviors governed by the surface properties of particles
5.4.1 Introduction
5.4.2 Materials and Methods
5.4.3 Results .
5.4.4 Discussion
5.4.5 Conclusion
5.5 Influence of water addition on powder behavior
5.6 Conclusion of the chapter
General conclusion and perspectives
Résumé étendu en français
References