Extraction and characterization of nanocellulose structures from raw cotton linter

► We present a procedure for extraction of nanocellulose structures from raw cotton linter. ► The raw linter and nanocellulose structures were characterized. ► Pulping the raw linter is not required before the nanocellulose extraction. ► The nanostructures have properties significantly different fro...

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Bibliographic Details
Published in:Carbohydrate polymers 2013-01, Vol.91 (1), p.229-235
Main Authors: Morais, João Paulo Saraiva, Rosa, Morsyleide de Freitas, de Souza Filho, Men de sá Moreira, Nascimento, Lidyane Dias, do Nascimento, Diego Magalhães, Cassales, Ana Ribeiro
Format: Article
Language:English
Subjects:
Agroindustrial waste
Cellulose - chemistry
Cellulose - isolation & purification
Co-product
Cotton Fiber
Gossypium hirsutum
Light scattering diffraction
Lignocellulosic characterization
Nanostructures - chemistry
Nanowhisker
Particle Size
Temperature
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Summary:► We present a procedure for extraction of nanocellulose structures from raw cotton linter. ► The raw linter and nanocellulose structures were characterized. ► Pulping the raw linter is not required before the nanocellulose extraction. ► The nanostructures have properties significantly different from the raw linter. ► Using linter for nanocellulose extraction is an option for value addition to this textile by-product. This study aimed to characterize nanocellulose extracted from cotton (Gossypium hirsutum) linters. The nanocellulose was subjected to electronic microscopy, thermal analysis, X-ray diffractometry, light scattering, and contact angle. The properties of the nanocellulose are considerably different from the linter. The acidic hydrolyses applied to extract the nanocrystals increased the crystallinity index and the hydrophilicity and decreased the thermal stability. On average, the nanocrystals were 177nm long and 12nm wide, with an aspect ratio of 19 when measured by microscopy. The light scattering results were coherent with the crystal dimensions. Cotton linter is a potential source of nanocellulose crystals, particularly to be used in the production of hydrophilic nanocomposites. Extraction of nanocellulose from raw cotton linter does not require pulping.
ISSN:0144-8617
1879-1344
DOI:10.1016/j.carbpol.2012.08.010