Cellulose Nanowhiskers Extracted from Tempo-Oxidized Curaua Fibers

ABSTRACT

The objective of this study was to obtain nanowhiskers from bleached and milled curaua fibers. Nanowhiskers were obtained via a TEMPO system. TEM micrographies proved the fibers were obtained. FTIR analysis showed characteristic peaks of the oxidation products for the samples submitted to the treatment, suggesting that the it was effective for cellulose. The results show that the TEMPO method increased crystallinity and decreased the degree of polymerization. As for thermal stability, the nanowhiskers were more thermally stable than the other samples. Based on our findings, the use of nanowhiskers may be suitable for a variety of applications, such as the production of nanocomposites.

摘要

本工作的目的是通过TEMPO方法获得纤维素纳米纤维.然而，要达到这一目的，需要按照这一顺序应用漂白、除颤和TEMPO方法，即槽形Curaua纤维（CF）.TEM张显微照片证明，经过漂白和除颤处理后，获得了纤维素纳米纤维（CNF）.扫描电镜照片表明，CF漂白工艺是有效的.傅立叶变换红外光谱（FTIR）分析表明，处理后样品的氧化产物具有特征峰，表明对纤维素有效.结果表明，TEMPO方法提高了结晶度，降低了聚合度.根据我们的研究结果，纳米晶须的使用可能适用于多种应用，例如生产纳米复合材料.

KEYWORDS:

• Curaua fibers
• nanocellulose
• pretreatment
• bleaching
• TEMPO
• process

关键词:

• 纤维
• 纳米纤维素
• 预处理
• 漂白
• 过程

Acknowledgments

The authors would like to express their gratitude to the University of Caxias do Sul (UCS), to the Post-Graduate Program in Process and Technology Engineering (PGEPROTEC) and to the Ministry of Labor and Employment (MTE).

Additional information

Funding

This work was supported by the University of Caxias do Sul (UCS) [UCS];Ministry of Labor and Employment (MTE) [MTE];Post-Graduate Program in Process and Technology Engineering (PGEPROTEC) [PGEPROTEC].