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Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers
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Porous Structure of Cylindrical Particle Compacts.
Aidana Boribayeva1, Gulfairuz Iniyatova1, Aruzhan Uringaliyeva1
1Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan.
Micromachines
|December 24, 2021
Summary
Compacts of cylindrical particles pack loosely with increasing aspect ratio due to interlocking. This impacts porous microstructure and transport properties in energy storage devices.
Area of Science:
- Materials Science and Engineering
- Computational Materials Science
- Particle Technology
Background:
- Porous compacts of non-spherical particles are crucial for energy storage and advanced applications.
- Understanding the microstructure of these compacts is key to optimizing their performance.
- Cylindrical particles present unique packing challenges compared to spherical ones.
Purpose of the Study:
- To investigate the microstructural characteristics of porous compacts formed by monodisperse cylindrical particles.
- To quantify how particle aspect ratio influences packing density and free volume.
- To provide data for optimizing porous microstructures to enhance transport properties.
Main Methods:
- Generation of cylindrical particles with varying aspect ratios using superquadrics.
- Simulation of gravity deposition and compaction using the discrete element method (DEM).
- Quantification of porous microstructure using Voronoi tessellation analysis.
Main Results:
- Increased aspect ratio of cylindrical particles generally leads to a higher median reduced free volume.
- Higher aspect ratios result in a decreased median local packing density.
- Mechanical interlocking of long cylinders contributes to looser packing structures.
Conclusions:
- The aspect ratio of cylindrical particles significantly affects the porous microstructure of compacts.
- Longer cylinders exhibit looser packing due to interlocking, impacting overall density and free volume.
- Findings are essential for designing and optimizing non-spherical particle compacts for improved functionality.
Keywords:
Voronoi tessellationmicrostructurenon-spherical particlespackingporous energy storage and devicespowder compactMore Related Videos
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