On the polymorphic and morphological changes of cellulose nanocrystals (CNC-I) upon mercerization and conversion to CNC-II

Tutkimustuotos: Lehtiartikkeli

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On the polymorphic and morphological changes of cellulose nanocrystals (CNC-I) upon mercerization and conversion to CNC-II. / Jin, Ersuo; Guo, Jiaqi; Yang, Fang; Zhu, Yangyang; Song, Junlong; Jin, Yongcan; Rojas, Orlando J.

julkaisussa: Carbohydrate Polymers, Vuosikerta 143, 05.06.2016, s. 327-335.

Tutkimustuotos: Lehtiartikkeli

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Jin, Ersuo ; Guo, Jiaqi ; Yang, Fang ; Zhu, Yangyang ; Song, Junlong ; Jin, Yongcan ; Rojas, Orlando J. / On the polymorphic and morphological changes of cellulose nanocrystals (CNC-I) upon mercerization and conversion to CNC-II. Julkaisussa: Carbohydrate Polymers. 2016 ; Vuosikerta 143. Sivut 327-335.

Bibtex - Lataa

@article{3ef7ba0e2d5d4ee8b7c577c7ad8b78db,
title = "On the polymorphic and morphological changes of cellulose nanocrystals (CNC-I) upon mercerization and conversion to CNC-II",
abstract = "Polymorphic and morphological transformations of cellulosic materials are strongly associated to their properties and applications, especially in the case of emerging nanocelluloses. Related changes that take place upon treatment of cellulose nanocrystals (CNC) in alkaline conditions are studied here by XRD, TEM, AFM, and other techniques. The results indicate polymorphic transformation of CNC proceeds gradually in a certain range of alkali concentrations, i.e. from about 8{\%} to 12.5{\%} NaOH. In such transition alkali concentration, cellulose I and II allomorphs coexists. Such value and range of the transition concentration is strongly interdependent with the crystallite size of CNCs. In addition, it is distinctively lower than that for macroscopic fibers (12-15{\%} NaOH). Transmission electron microscopy and particle sizing reveals that after mercerization CNCs tend to associate. Furthermore, TEMPO-oxidized mercerized CNC reveals the morphology of individual nanocrystal of the cellulose II type, which is composed of some interconnected granular structures. Overall, this work reveals how the polymorphism and morphology of individual CNC change in alkali conditions and sheds light onto the polymorphic transition from cellulose I to II.",
keywords = "Cellulose I and II, Cellulose nanocrystals, CNC, Crystallinity, Crystallite size, Mercerization, Polymorphs",
author = "Ersuo Jin and Jiaqi Guo and Fang Yang and Yangyang Zhu and Junlong Song and Yongcan Jin and Rojas, {Orlando J.}",
year = "2016",
month = "6",
day = "5",
doi = "10.1016/j.carbpol.2016.01.048",
language = "English",
volume = "143",
pages = "327--335",
journal = "Carbohydrate Polymers",
issn = "0144-8617",

}

RIS - Lataa

TY - JOUR

T1 - On the polymorphic and morphological changes of cellulose nanocrystals (CNC-I) upon mercerization and conversion to CNC-II

AU - Jin, Ersuo

AU - Guo, Jiaqi

AU - Yang, Fang

AU - Zhu, Yangyang

AU - Song, Junlong

AU - Jin, Yongcan

AU - Rojas, Orlando J.

PY - 2016/6/5

Y1 - 2016/6/5

N2 - Polymorphic and morphological transformations of cellulosic materials are strongly associated to their properties and applications, especially in the case of emerging nanocelluloses. Related changes that take place upon treatment of cellulose nanocrystals (CNC) in alkaline conditions are studied here by XRD, TEM, AFM, and other techniques. The results indicate polymorphic transformation of CNC proceeds gradually in a certain range of alkali concentrations, i.e. from about 8% to 12.5% NaOH. In such transition alkali concentration, cellulose I and II allomorphs coexists. Such value and range of the transition concentration is strongly interdependent with the crystallite size of CNCs. In addition, it is distinctively lower than that for macroscopic fibers (12-15% NaOH). Transmission electron microscopy and particle sizing reveals that after mercerization CNCs tend to associate. Furthermore, TEMPO-oxidized mercerized CNC reveals the morphology of individual nanocrystal of the cellulose II type, which is composed of some interconnected granular structures. Overall, this work reveals how the polymorphism and morphology of individual CNC change in alkali conditions and sheds light onto the polymorphic transition from cellulose I to II.

AB - Polymorphic and morphological transformations of cellulosic materials are strongly associated to their properties and applications, especially in the case of emerging nanocelluloses. Related changes that take place upon treatment of cellulose nanocrystals (CNC) in alkaline conditions are studied here by XRD, TEM, AFM, and other techniques. The results indicate polymorphic transformation of CNC proceeds gradually in a certain range of alkali concentrations, i.e. from about 8% to 12.5% NaOH. In such transition alkali concentration, cellulose I and II allomorphs coexists. Such value and range of the transition concentration is strongly interdependent with the crystallite size of CNCs. In addition, it is distinctively lower than that for macroscopic fibers (12-15% NaOH). Transmission electron microscopy and particle sizing reveals that after mercerization CNCs tend to associate. Furthermore, TEMPO-oxidized mercerized CNC reveals the morphology of individual nanocrystal of the cellulose II type, which is composed of some interconnected granular structures. Overall, this work reveals how the polymorphism and morphology of individual CNC change in alkali conditions and sheds light onto the polymorphic transition from cellulose I to II.

KW - Cellulose I and II

KW - Cellulose nanocrystals

KW - CNC

KW - Crystallinity

KW - Crystallite size

KW - Mercerization

KW - Polymorphs

UR - http://www.scopus.com/inward/record.url?scp=84959482761&partnerID=8YFLogxK

U2 - 10.1016/j.carbpol.2016.01.048

DO - 10.1016/j.carbpol.2016.01.048

M3 - Article

VL - 143

SP - 327

EP - 335

JO - Carbohydrate Polymers

JF - Carbohydrate Polymers

SN - 0144-8617

ER -

ID: 1709353