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Materials 2014, 7(9), 6105-6119; doi:10.3390/ma7096105

Native Cellulose: Structure, Characterization and Thermal Properties

Laboratory of Polymers (LPOL), University of Caxias do Sul (UCS), Francisco Getúlio Vargas 1130, Caxias do Sul, Rio Grande do Sul 95070-560, Brazil
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Received: 25 June 2014 / Revised: 25 July 2014 / Accepted: 12 August 2014 / Published: 25 August 2014
(This article belongs to the Special Issue Advances in Cellulosic Materials 2014)
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Abstract

In this work, the relationship between cellulose crystallinity, the influence of extractive content on lignocellulosic fiber degradation, the correlation between chemical composition and the physical properties of ten types of natural fibers were investigated by FTIR spectroscopy, X-ray diffraction and thermogravimetry techniques. The results showed that higher extractive contents associated with lower crystallinity and lower cellulose crystallite size can accelerate the degradation process and reduce the thermal stability of the lignocellulosic fibers studied. On the other hand, the thermal decomposition of natural fibers is shifted to higher temperatures with increasing the cellulose crystallinity and crystallite size. These results indicated that the cellulose crystallite size affects the thermal degradation temperature of natural fibers. This study showed that through the methods used, previous information about the structure and properties of lignocellulosic fibers can be obtained before use in composite formulations. View Full-Text
Keywords: natural fibers; cellulose; crystallinity; XRD; FTIR; thermal stability natural fibers; cellulose; crystallinity; XRD; FTIR; thermal stability
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Poletto, M.; Ornaghi , H.L., Júnior; Zattera, A.J. Native Cellulose: Structure, Characterization and Thermal Properties. Materials 2014, 7, 6105-6119.

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