溶媒である「水」の仕組みを解明することで、より環境に配慮したセルロース系製品の開発に貢献(Studying Fundamentals of Water as a Solvent Could Lead to Greener Cellulose-Based Products)

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2023-05-03 ノースカロライナ州立大学(NCState)

◆ノースカロライナ州立大学の新しい研究成果によると、水は相互作用によってその可溶性特性を変えることができ、特にセルロースと相互作用すると、層状の殻に積み重なって、物質の化学反応や物理特性を制御することができることが分かった。
◆この研究成果は、セルロースベースの製品のより持続可能で効率的な設計に影響を与えるとされている。研究者らは、セルロースと水の相互作用を調べ、水が分子構造内の化学反応を制御する方法について探究した。
◆この研究成果は、水を操ることでより良い製品やプロセスを設計するための基盤を築くことに役立つと期待されている。

<関連情報>

水-セルロースネットワークの分子構造に関する計算および実験的な洞察 Computational and experimental insights into the molecular architecture of water-cellulose networks

Khandoker Samaher Salem, Nelson Barrios, Hasan Jameel, Lokendra Pal, Lucian Lucia
Matter  Available online: 3 May 2023
DOI:https://doi.org/10.1016/j.matt.2023.03.021

溶媒である「水」の仕組みを解明することで、より環境に配慮したセルロース系製品の開発に貢献(Studying Fundamentals of Water as a Solvent Could Lead to Greener Cellulose-Based Products)

Progress and potential

The current perspective provides insights into expressing a treatment of water from its traditional solvent role to one more participatory using the construct of cellulose networks. We contend that water molecules have a much more profound interaction and influence on “surrounding” reagents, networks, and chemical systems than deducible from first-order approximations. We have observed and calculated, for example, that water stacks in discrete layered hydration shells to control reactivity, engage in long-range chemical reactions, and induce significant exothermic organization (e.g., crystallization-like phenomena) that again affects ultimate reactivity and physical properties of cellulose networks. Such insights have significant implications for evaluating how to introduce and exploit water for controlling or mitigating reactivity, drying, and processing hydrophilic networks. Water above all does not behave as a simple “in-the-box” cage as expected for solvation. It can do much more, which is left for the scientific community to uncover, but our perspective offers intriguing insights and impetus to further such deeper investigations into its chemical dynamics.

Summary

The current perspective attempts to provide key insights into several major aspects of water solvation supported by several experimental and computational investigations. It is postulated that water is not just a common solvent from the framework of the molecular level, but in fact can play the role of a co-reactant or induce an “organizational constraint” (e.g., crystallization) to regulate the rate of chemical reactions. The focus of our perspective is to provide insight into these phenomena; we will cast our net toward the formation of putative water molecules’ stacking around the three-dimensional network of the cellulose, the most abundant biomaterial on the planet, which is further mitigated by hydrogen bonding and water-cellulose molecular architecture on the morphology, properties, and chemical reactivity of micro- and nanocellulose. Our perspective also introduces the idea of water hydration shells present immediate to the hydrophilic surface of the cellulose that can help articulate water chemistry and the challenges it presents during drying.

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