The morphological regulation of nanocellulose using a hydrated deep eutectic solvent system

IF 4.8 2区工程技术 Q1 MATERIALS SCIENCE, PAPER & WOOD

Cellulose Pub Date : 2025-07-15 DOI:10.1007/s10570-025-06667-9

Jie Jiang, Ze Li, Jing Luo, Juan Meng, Long Cheng, Hengfei Qin

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Abstract

As a renewable biomass nanomaterial, nanocellulose demonstrates immense potential for applications in reinforced composites, biomedicine, and nanoelectronics. The morphology of nanocellulose directly governs its properties and performance in specific applications. In this study, a hydrated citric acid/choline chloride deep eutectic solvent (DES) system was employed to modify straw cellulose for preparing nanocellulose. The kinetic interplay between citric acid-mediated hydrolysis and esterification reactions within cellulose during the modification process was systematically investigated. The carboxylate content of the modified cellulose exhibited a linear increase to 0.78 mmol/g within the initial one hour of DES treatment, followed by a plateau phase. Progressive hydrolysis of cellulose was observed throughout the DES treatment. By precisely controlling the carboxylate content and hydrolysis extent of modified cellulose, we successfully prepared nanocellulose with morphology controllably tailored from linear nanofibers to rod-like nanocrystals. The resulting nanocellulose with varying aspect ratios exhibited predictable variations in the mechanical properties of their corresponding films and hydrogels. Furthermore, the stabilization performance of Pickering emulsions using different types of nanocellulose was comparatively analyzed. This work elucidates the mechanism by which hydrated DES treatment conditions regulate the morphology of straw nanocellulose, while also providing a critical foundation and technical framework for nanocellulose production.

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水合深共晶溶剂体系对纳米纤维素的形态调控

纳米纤维素作为一种可再生的生物质纳米材料，在增强复合材料、生物医药、纳米电子学等领域具有巨大的应用潜力。纳米纤维素的形态直接决定了其在特定应用中的性能。本研究采用水合柠檬酸/氯化胆碱深度共熔溶剂（DES）体系对秸秆纤维素进行改性，制备纳米纤维素。研究了纤维素改性过程中柠檬酸介导的水解和酯化反应的动力学相互作用。改性纤维素的羧酸盐含量在DES处理后的1小时内呈线性增长，达到0.78 mmol/g，随后进入平稳期。在整个DES处理过程中观察到纤维素的逐步水解。通过精确控制改性纤维素的羧酸盐含量和水解程度，我们成功地制备了从线性纳米纤维到棒状纳米晶体的纳米纤维素。所得到的具有不同长宽比的纳米纤维素在其相应的薄膜和水凝胶的机械性能上表现出可预测的变化。对比分析了不同类型纳米纤维素对皮克林乳液的稳定性能。本研究阐明了水合DES处理条件调控秸秆纳米纤维素形态的机理，同时也为纳米纤维素的生产提供了重要的基础和技术框架。

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来源期刊

Cellulose 工程技术-材料科学：纺织

CiteScore

10.10

自引率

10.50%

发文量

580

审稿时长

3-8 weeks

期刊介绍： Cellulose is an international journal devoted to the dissemination of research and scientific and technological progress in the field of cellulose and related naturally occurring polymers. The journal is concerned with the pure and applied science of cellulose and related materials, and also with the development of relevant new technologies. This includes the chemistry, biochemistry, physics and materials science of cellulose and its sources, including wood and other biomass resources, and their derivatives. Coverage extends to the conversion of these polymers and resources into manufactured goods, such as pulp, paper, textiles, and manufactured as well natural fibers, and to the chemistry of materials used in their processing. Cellulose publishes review articles, research papers, and technical notes.