Effect of mechanical treatment on properties of cellulose nanofibrils produced from bleached hardwood and softwood pulps

Bleached hardwood and softwood South African kraft pulps were passed through a commercially available micro grinder for varying number of passes and the properties of the resultant pulps were assessed periodically using microscopy, Fourier transform infrared spectroscopy (FTIR), X-ray crystallograph...

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Autores principales:	Lekha,P, Mtibe,A, Motaung,T.E, Andrew,J.E, Sitholè,B.B, Gibril,M
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2016
Materias:	Cellulose nanofibrils Supermasscolloider South African TGA transmission electron microscopy XRD
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2016000300006
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spelling	oai:scielo:S0718-221X20160003000062016-08-04Effect of mechanical treatment on properties of cellulose nanofibrils produced from bleached hardwood and softwood pulpsLekha,PMtibe,AMotaung,T.EAndrew,J.ESitholè,B.BGibril,M Cellulose nanofibrils Supermasscolloider South African TGA transmission electron microscopy XRD Bleached hardwood and softwood South African kraft pulps were passed through a commercially available micro grinder for varying number of passes and the properties of the resultant pulps were assessed periodically using microscopy, Fourier transform infrared spectroscopy (FTIR), X-ray crystallography (XRD) and Thermogravimetric analysis (TGA). The ultrastructural analysis of the pulp fibres revealed that after 120 passes both hardwood and softwood bleached fibres showed the presence of cellulose nanofibres (CNFs). The FTIR analysis showed no modification to the cellulose structure and side groups upon treatment with the supermasscolloider (SMC). Both hardwood and softwood pulp fibres showed a decline in crystallinity after SMC treatment. For the hardwood pulps there were no major differences between the untreated pulps and those passed through the SMC. In the case of the softwood pulps, the SMC treatment resulted in more thermally stable CNFs compared with the untreated bleached pulps. This was observed at several levels of treatment (40, 120 and 200 passes). After 200 passes both the hardwood and softwood kraft pulp fibres produced CNFs with an average width of 11 nm and lengths with several micrometers.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.18 n.3 20162016-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2016000300006en10.4067/S0718-221X2016005000041
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Cellulose nanofibrils Supermasscolloider South African TGA transmission electron microscopy XRD
spellingShingle	Cellulose nanofibrils Supermasscolloider South African TGA transmission electron microscopy XRD Lekha,P Mtibe,A Motaung,T.E Andrew,J.E Sitholè,B.B Gibril,M Effect of mechanical treatment on properties of cellulose nanofibrils produced from bleached hardwood and softwood pulps
description	Bleached hardwood and softwood South African kraft pulps were passed through a commercially available micro grinder for varying number of passes and the properties of the resultant pulps were assessed periodically using microscopy, Fourier transform infrared spectroscopy (FTIR), X-ray crystallography (XRD) and Thermogravimetric analysis (TGA). The ultrastructural analysis of the pulp fibres revealed that after 120 passes both hardwood and softwood bleached fibres showed the presence of cellulose nanofibres (CNFs). The FTIR analysis showed no modification to the cellulose structure and side groups upon treatment with the supermasscolloider (SMC). Both hardwood and softwood pulp fibres showed a decline in crystallinity after SMC treatment. For the hardwood pulps there were no major differences between the untreated pulps and those passed through the SMC. In the case of the softwood pulps, the SMC treatment resulted in more thermally stable CNFs compared with the untreated bleached pulps. This was observed at several levels of treatment (40, 120 and 200 passes). After 200 passes both the hardwood and softwood kraft pulp fibres produced CNFs with an average width of 11 nm and lengths with several micrometers.
author	Lekha,P Mtibe,A Motaung,T.E Andrew,J.E Sitholè,B.B Gibril,M
author_facet	Lekha,P Mtibe,A Motaung,T.E Andrew,J.E Sitholè,B.B Gibril,M
author_sort	Lekha,P
title	Effect of mechanical treatment on properties of cellulose nanofibrils produced from bleached hardwood and softwood pulps
title_short	Effect of mechanical treatment on properties of cellulose nanofibrils produced from bleached hardwood and softwood pulps
title_full	Effect of mechanical treatment on properties of cellulose nanofibrils produced from bleached hardwood and softwood pulps
title_fullStr	Effect of mechanical treatment on properties of cellulose nanofibrils produced from bleached hardwood and softwood pulps
title_full_unstemmed	Effect of mechanical treatment on properties of cellulose nanofibrils produced from bleached hardwood and softwood pulps
title_sort	effect of mechanical treatment on properties of cellulose nanofibrils produced from bleached hardwood and softwood pulps
publisher	Universidad del Bío-Bío
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2016000300006
work_keys_str_mv	AT lekhap effectofmechanicaltreatmentonpropertiesofcellulosenanofibrilsproducedfrombleachedhardwoodandsoftwoodpulps AT mtibea effectofmechanicaltreatmentonpropertiesofcellulosenanofibrilsproducedfrombleachedhardwoodandsoftwoodpulps AT motaungte effectofmechanicaltreatmentonpropertiesofcellulosenanofibrilsproducedfrombleachedhardwoodandsoftwoodpulps AT andrewje effectofmechanicaltreatmentonpropertiesofcellulosenanofibrilsproducedfrombleachedhardwoodandsoftwoodpulps AT sitholebb effectofmechanicaltreatmentonpropertiesofcellulosenanofibrilsproducedfrombleachedhardwoodandsoftwoodpulps AT gibrilm effectofmechanicaltreatmentonpropertiesofcellulosenanofibrilsproducedfrombleachedhardwoodandsoftwoodpulps
_version_	1714202625718616064

Effect of mechanical treatment on properties of cellulose nanofibrils produced from bleached hardwood and softwood pulps

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