Review
Version 1
Preserved in Portico This version is not peer-reviewed
Optimization of Mechanochemical Processes Toward Functional Nanocomposite Materials
Version 1
: Received: 23 June 2023 / Approved: 25 June 2023 / Online: 25 June 2023 (05:02:22 CEST)
A peer-reviewed article of this Preprint also exists.
Senna, M. The Optimization of Mechanochemical Processes toward Functional Nanocomposite Materials. Powders 2023, 2, 659-677. Senna, M. The Optimization of Mechanochemical Processes toward Functional Nanocomposite Materials. Powders 2023, 2, 659-677.
Abstract
Mechanochemical technology is developing rapidly, judging by the scientific information in both basic and applied studies. However, many issues and points of view remain to be discussed. This review presents some new key issues for the optimization of mechanochemical processes in theoretical and practical aspects. Emphasis is placed on powder technology aspects, which are not always discussed compared to functional or microscopic viewpoints. The transfer of chemical species across the interparticle interface between organic and inorganic species during the mechanosynthesis of nanocomposite oxides offers many new possibilities, which are discussed here in detail. Since all material transport is preceded by charge transfer, its driving force has been searched for using terminology beyond the well-established electrochemical ones. The role of organic compounds during the whole process is emphasized, regardless of their survival in the final product. The similarity with the pharmaceutical phenomena is pointed out, although its mentality is very different from that of the synthesis of nanocomposites. Not only for the rational amorphization of the active pharmaceutical ingredient, but also for the stabilization of molecular dispersion states with the participation of excipients are discussed. The effects of liquids, either added or formed by mechanochemical auto-liquefaction, are presented with reference to the comparison between wet and dry grinding. Finally, mechanisms of apparent stabilization of mechanically activated states of products are elucidated to investigate the practical applicability of mechanochemically synthesized products
Keywords
Charge transfer; Interparticle boundary; Metastable states; Molecular dispersion; Auto-liquefaction; Nanoglassy states:
Subject
Chemistry and Materials Science, Materials Science and Technology
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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