Examining the efficiency of mechanic/enzymatic pretreatments in micro/nanofibrillated cellulose production

Abstract: There is still a need to improve the production sequences of micro fibrillated and nano fibrillated celluloses to obtain more economic and better quality products. The aim of this study was to improve the production efficiency and quality of micro fibrillated and nano fibrillated cellulose...

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Autores principales:	Tozluoglu,Ayhan, Poyraz,Bayram, Candan,Zeki
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2018
Materias:	Biofilm chemical characterization Kraft pulp homogenization thermomechanical characterization.
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2018000100067
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spelling	oai:scielo:S0718-221X20180001000672018-09-25Examining the efficiency of mechanic/enzymatic pretreatments in micro/nanofibrillated cellulose productionTozluoglu,AyhanPoyraz,BayramCandan,Zeki Biofilm chemical characterization Kraft pulp homogenization thermomechanical characterization. Abstract: There is still a need to improve the production sequences of micro fibrillated and nano fibrillated celluloses to obtain more economic and better quality products. The aim of this study was to improve the production efficiency and quality of micro fibrillated and nano fibrillated celluloses by examining the enzyme (xylanase endo-1,4-) employed in pretreatment sequences. Fairly homogeneous nano fibrillated cellulose with a width of 35 ± 12 nm was produced in this study. Sequences employed to produce micro fibrillated and nano fibrillated celluloses decreased the cellulose crystallinity of bleached kraft pulp and lower total crystalline index and lateral order index values were observed for micro fibrillated and nano fibrillated celluloses in FTIR examinations. Lower crystallinities were also defined by 13C-NMR (46,2 ppm) which was substantiated with C6 peaks in the amorphous domain. Sequences to produce micro fibrillated and nano fibrillated celluloses resulted in shorter fiber dimensions with less ordered cellulose structure leading lower thermal degradation that reveal main polymer chain source from cellulose units. Dynamic mechanical thermal analysis results showed that the initial and maximum storage modulus of the nano fibrillated and micro fibrillated celluloses films were improved by 114% and 101%, respectively. The storage modulus of micro fibrillated and nano fibrillated celluloses films were 4,96 GPa and 2,66 GPa at temperature of 235°C, respectively.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.20 n.1 20182018-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2018000100067en10.4067/S0718-221X2018005001601
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Biofilm chemical characterization Kraft pulp homogenization thermomechanical characterization.
spellingShingle	Biofilm chemical characterization Kraft pulp homogenization thermomechanical characterization. Tozluoglu,Ayhan Poyraz,Bayram Candan,Zeki Examining the efficiency of mechanic/enzymatic pretreatments in micro/nanofibrillated cellulose production
description	Abstract: There is still a need to improve the production sequences of micro fibrillated and nano fibrillated celluloses to obtain more economic and better quality products. The aim of this study was to improve the production efficiency and quality of micro fibrillated and nano fibrillated celluloses by examining the enzyme (xylanase endo-1,4-) employed in pretreatment sequences. Fairly homogeneous nano fibrillated cellulose with a width of 35 ± 12 nm was produced in this study. Sequences employed to produce micro fibrillated and nano fibrillated celluloses decreased the cellulose crystallinity of bleached kraft pulp and lower total crystalline index and lateral order index values were observed for micro fibrillated and nano fibrillated celluloses in FTIR examinations. Lower crystallinities were also defined by 13C-NMR (46,2 ppm) which was substantiated with C6 peaks in the amorphous domain. Sequences to produce micro fibrillated and nano fibrillated celluloses resulted in shorter fiber dimensions with less ordered cellulose structure leading lower thermal degradation that reveal main polymer chain source from cellulose units. Dynamic mechanical thermal analysis results showed that the initial and maximum storage modulus of the nano fibrillated and micro fibrillated celluloses films were improved by 114% and 101%, respectively. The storage modulus of micro fibrillated and nano fibrillated celluloses films were 4,96 GPa and 2,66 GPa at temperature of 235°C, respectively.
author	Tozluoglu,Ayhan Poyraz,Bayram Candan,Zeki
author_facet	Tozluoglu,Ayhan Poyraz,Bayram Candan,Zeki
author_sort	Tozluoglu,Ayhan
title	Examining the efficiency of mechanic/enzymatic pretreatments in micro/nanofibrillated cellulose production
title_short	Examining the efficiency of mechanic/enzymatic pretreatments in micro/nanofibrillated cellulose production
title_full	Examining the efficiency of mechanic/enzymatic pretreatments in micro/nanofibrillated cellulose production
title_fullStr	Examining the efficiency of mechanic/enzymatic pretreatments in micro/nanofibrillated cellulose production
title_full_unstemmed	Examining the efficiency of mechanic/enzymatic pretreatments in micro/nanofibrillated cellulose production
title_sort	examining the efficiency of mechanic/enzymatic pretreatments in micro/nanofibrillated cellulose production
publisher	Universidad del Bío-Bío
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2018000100067
work_keys_str_mv	AT tozluogluayhan examiningtheefficiencyofmechanicenzymaticpretreatmentsinmicronanofibrillatedcelluloseproduction AT poyrazbayram examiningtheefficiencyofmechanicenzymaticpretreatmentsinmicronanofibrillatedcelluloseproduction AT candanzeki examiningtheefficiencyofmechanicenzymaticpretreatmentsinmicronanofibrillatedcelluloseproduction
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Examining the efficiency of mechanic/enzymatic pretreatments in micro/nanofibrillated cellulose production

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