Is it possible to completely dry cellulose?

IF 10.7 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers Pub Date : 2025-05-23 DOI:10.1016/j.carbpol.2025.123803

Aleksandar Y. Mehandzhiyski , Maria-Ximena Ruiz-Caldas , Patrick Heasman , Varvara Apostolopoulou-Kalkavoura , Lennart Bergström , Igor Zozoulenko

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引用次数: 0

Abstract

Cellulose nanocrystals (CNCs) are widely used in advanced materials due to their unique mechanical and physicochemical properties. However, their interactions with water, particularly in the context of drying, remain poorly understood. The presence of bound water in CNC poses challenges for processing, storage, and applications sensitive to moisture. In this study, we combine molecular simulations and experimental drying investigations to assess the extent of water retention in both native and TEMPO-CNC under different thermodynamic conditions. Our results demonstrate that while native CNCs can be fully dried under low pressure (≤1 mbar) and elevated temperature (110 °C), TEMPO-CNC retain a significant amount of water (1–7 wt%) due to electrostatic interactions between water molecules and the charged surface carboxylic groups and the sodium counter-ions. These findings provide fundamental insights into the drying behavior of functionalized nanocellulose and highlight the importance of considering residual bound water in applications requiring moisture-sensitive performance.

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有可能使纤维素完全干燥吗？

纤维素纳米晶体以其独特的机械和物理化学性质在先进材料中得到了广泛的应用。然而，它们与水的相互作用，特别是在干燥的情况下，仍然知之甚少。CNC中结合水的存在对加工、存储和对水分敏感的应用提出了挑战。在这项研究中，我们结合分子模拟和实验干燥研究来评估不同热力学条件下天然和TEMPO-CNC的保水程度。我们的研究结果表明，虽然天然cnc可以在低压（≤1mbar）和高温（110°C）下完全干燥，但由于水分子与带电表面羧基和钠反离子之间的静电相互作用，TEMPO-CNC保留了大量的水（1 - 7 wt%）。这些发现为功能化纳米纤维素的干燥行为提供了基本的见解，并强调了在需要湿敏感性能的应用中考虑残余结合水的重要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Carbohydrate Polymers 化学-高分子科学

CiteScore

22.40

自引率

8.00%

发文量

1286

审稿时长

47 days

期刊介绍： Carbohydrate Polymers stands as a prominent journal in the glycoscience field, dedicated to exploring and harnessing the potential of polysaccharides with applications spanning bioenergy, bioplastics, biomaterials, biorefining, chemistry, drug delivery, food, health, nanotechnology, packaging, paper, pharmaceuticals, medicine, oil recovery, textiles, tissue engineering, wood, and various aspects of glycoscience. The journal emphasizes the central role of well-characterized carbohydrate polymers, highlighting their significance as the primary focus rather than a peripheral topic. Each paper must prominently feature at least one named carbohydrate polymer, evident in both citation and title, with a commitment to innovative research that advances scientific knowledge.