利用 TEMPO 氧化纤维增强纳米纤维素 xerogels 的机械性能

IF 10.7 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers Pub Date : 2024-10-30 DOI:10.1016/j.carbpol.2024.122839

Jerred Wassgren, Brandon R. Clarke, M. Bachir Messikh, Ching-Hsien Ho, Alfred J. Crosby, Gregory N. Tew, Kenneth R. Carter

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引用次数: 0

摘要

我们报告了由 TEMPO 氧化纤维素纳米纤维（Ox-CNF）制备的异构凝胶，这种凝胶的屈服应力和杨氏模量（E）最高可达 15.4 兆帕。通过密度测定、扫描电子显微镜（SEM）、Brunauer-Emmet-Teller（BET）实验和显微CT分析，测量了异构凝胶的高孔隙率（95%）。异构凝胶的密度为 0.0182 至 0.0471 g/cm3。我们报告说，溶剂交换过程引入了孔径分布，从而提高了机械性能。机械性能是通过使用扁平冲床进行单调和周期性单轴压缩测量来评估的。这些高多孔 Ox-CNF 异凝胶的机械性能优于其他 CNF 异凝胶和气凝胶。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Enhancement of mechanical properties of nanocellulose xerogels using TEMPO-oxidized fibers

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Enhancement of mechanical properties of nanocellulose xerogels using TEMPO-oxidized fibers

We report xerogels prepared from TEMPO-oxidized cellulose nanofiber (Ox-CNF) that have enhanced yield stresses and Young's Modulus (E) up to 15.4 MPa. The xerogels were highly porous (>95 %) and were measured by density determination, SEM, Brunauer-Emmet-Teller (BET) experiments, and microCT analysis. The xerogels had a density of 0.0182 to 0.0471 g/cm³. We report that the solvent exchange process introduces a distribution of pore sizes and leads to enhanced mechanical properties. Mechanical properties were evaluated by monotonic and cyclical uniaxial compression measurements using a flat punch. These highly porous Ox-CNF xerogels have superior mechanical properties to other CNF xerogels and aerogels.

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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.