Relationship between Structural Characteristics of Cellulose Nanocrystals Obtained from Kraft Pulp
Kraft pulp cellulose was hydrolyzed using sulfuric acid, under different thermophysical conditions of temperature, time, pulp concentration, and sonication time. The experimental design revealed the effect of these conditions and their interaction on the hydrolysis yield obtained. In addition, the t...
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doaj-f0f35d16e83d4060846b8a3784e9f30f2020-11-25T02:53:01ZengMDPI AGNanomaterials2079-49912020-09-01101775177510.3390/nano10091775Relationship between Structural Characteristics of Cellulose Nanocrystals Obtained from Kraft PulpMaría Graciela Aguayo0Arturo Fernández-Pérez1Claudia Oviedo2Guillermo Reyes3Pablo Reyes-Contreras4Centro de Biomateriales y Nanotecnología, Universidad del Bío-Bío, Concepción C.P. 4081112, ChileFacultad de Ciencias, Depto. de Física, Universidad del Bío-Bío, Concepción C.P. 4081112, ChileFacultad de Ciencias, Depto. de Química, Universidad del Bío-Bío, Concepción C.P. 4081112, ChileBiobased Colloids and Materials, Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, FI-00076 Espoo, FinlandCentro de Excelencia en Nanotecnología Leitat Chile (CEN), LEITAT Chile, Santiago C.P. 7500000, ChileKraft pulp cellulose was hydrolyzed using sulfuric acid, under different thermophysical conditions of temperature, time, pulp concentration, and sonication time. The experimental design revealed the effect of these conditions and their interaction on the hydrolysis yield obtained. In addition, the top five cellulose nanocrystals (CNCs) yields from this experiment design were analyzed. The results obtained indicated that CNCs possess a morphology that can be described as individualized rod particles, with average diameters less than 50 nm and different size distribution. In the analysis of CNCs features, significant Pearson correlations were established between the crystallinity of the CNC, CNC yield, and interplanar crystallites distance (Δ<i>d</i>/<i>d</i>). The thermogravimetric (DTG) profiles exhibited two CNCs degradation stages, where the second stage CNCs degradation showed a significative correlation with CNC sulfur content. In our analysis, the crystallographic parameters exhibited a correlation with the mechanical behavior of the CNC, since the potential variation between the distances of the crystalline planes is related to the stress and deformation present in the crystallites of CNCs. This study provides new knowledge regarding CNCs, further enhancing information for CNC-based industries and the processability of CNCs for the development of new materials.https://www.mdpi.com/2079-4991/10/9/1775cellulose nanocrystalskraft pulpCNC characterizationcharacterization techniques |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
María Graciela Aguayo Arturo Fernández-Pérez Claudia Oviedo Guillermo Reyes Pablo Reyes-Contreras |
spellingShingle |
María Graciela Aguayo Arturo Fernández-Pérez Claudia Oviedo Guillermo Reyes Pablo Reyes-Contreras Relationship between Structural Characteristics of Cellulose Nanocrystals Obtained from Kraft Pulp Nanomaterials cellulose nanocrystals kraft pulp CNC characterization characterization techniques |
author_facet |
María Graciela Aguayo Arturo Fernández-Pérez Claudia Oviedo Guillermo Reyes Pablo Reyes-Contreras |
author_sort |
María Graciela Aguayo |
title |
Relationship between Structural Characteristics of Cellulose Nanocrystals Obtained from Kraft Pulp |
title_short |
Relationship between Structural Characteristics of Cellulose Nanocrystals Obtained from Kraft Pulp |
title_full |
Relationship between Structural Characteristics of Cellulose Nanocrystals Obtained from Kraft Pulp |
title_fullStr |
Relationship between Structural Characteristics of Cellulose Nanocrystals Obtained from Kraft Pulp |
title_full_unstemmed |
Relationship between Structural Characteristics of Cellulose Nanocrystals Obtained from Kraft Pulp |
title_sort |
relationship between structural characteristics of cellulose nanocrystals obtained from kraft pulp |
publisher |
MDPI AG |
series |
Nanomaterials |
issn |
2079-4991 |
publishDate |
2020-09-01 |
description |
Kraft pulp cellulose was hydrolyzed using sulfuric acid, under different thermophysical conditions of temperature, time, pulp concentration, and sonication time. The experimental design revealed the effect of these conditions and their interaction on the hydrolysis yield obtained. In addition, the top five cellulose nanocrystals (CNCs) yields from this experiment design were analyzed. The results obtained indicated that CNCs possess a morphology that can be described as individualized rod particles, with average diameters less than 50 nm and different size distribution. In the analysis of CNCs features, significant Pearson correlations were established between the crystallinity of the CNC, CNC yield, and interplanar crystallites distance (Δ<i>d</i>/<i>d</i>). The thermogravimetric (DTG) profiles exhibited two CNCs degradation stages, where the second stage CNCs degradation showed a significative correlation with CNC sulfur content. In our analysis, the crystallographic parameters exhibited a correlation with the mechanical behavior of the CNC, since the potential variation between the distances of the crystalline planes is related to the stress and deformation present in the crystallites of CNCs. This study provides new knowledge regarding CNCs, further enhancing information for CNC-based industries and the processability of CNCs for the development of new materials. |
topic |
cellulose nanocrystals kraft pulp CNC characterization characterization techniques |
url |
https://www.mdpi.com/2079-4991/10/9/1775 |
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