Effect of microwave radiation on diffusion behavior of anti-solvent during crystallization

• Published in: Journal of crystal growth Vol. 402; pp. 32 - 36
• Main Authors: Asakuma, Yusuke, Miura, Masataka
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.09.2014; Elsevier
• Subjects: A1. Diffusion; A2. Growth from solutions; B1. Sodium chloride; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Crystal growth; Crystallization; Diffusion in solids; Equations of state, phase equilibria, and phase transitions; Ethanol; Ethyl alcohol; Exact sciences and technology; Materials science; Microwaves; Nanoscale materials and structures: fabrication and characterization; Other topics in nanoscale materials and structures; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Physics; Precipitates; Precipitation; Sodium chloride; Solid-solid transitions; Specific phase transitions; Transport properties of condensed matter (nonelectronic); B1. Sodium chloride; A2. Growth from solutions; A1. Diffusion; Crystal growth; Particle size; Molecular diffusion; Ethanol; Crystallization; Sodium chloride; Dissolution; Precipitates; Nanoparticles; Precipitation; Diffusion; Nanostructured materials; Growth from solution
• ISSN: 0022-0248; 1873-5002
• DOI: 10.1016/j.jcrysgro.2014.04.031

The effect of microwave radiation on anti-solvent crystallization was investigated by in situ observation of nanoparticle size in a reactor. The precipitation of sodium chloride by the addition of ethanol was accelerated by the increase in molecular diffusion caused by microwave radiation. The microwave power controlled the particle size because increasing the power increases the temperature, which leads to the dissolution of the precipitate. The salt concentration in the solution, and the anti-solvent concentration and volume were important factors in anti-solvent crystallization under microwave radiation. Microwave reactor with a dynamic light scattering system. [Display omitted] •Anti-solvent diffusion and dissolution during MW caused rapid crystal growth.•Salt and ethanol concentrations are important for anti-solvent crystallization with MW.•Microwave radiation influences the precipitation more at higher salt concentrations.