Effects of pretreatments on crystalline properties and morphology of cellulose nanocrystals View Full Text


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Article Info

DATE

2013-10

AUTHORS

Dong Yang, Xin-Wen Peng, Lin-Xin Zhong, Xue-Fei Cao, Wei Chen, Run-Cang Sun

ABSTRACT

Cellulose nanocrystals (CNCs) have drawn tremendous attention because of their extraordinary physical and chemical properties as well as renewability and sustainability. In this work, after a range of pretreatments, such as freeze-drying, ball-milling, mercerization, N-methylmorpholine-N-oxide dissolution and ionic liquid dissolution, various CNCs with different crystalline properties and morphologies were obtained by hydrolysis or oxidation. XRD and AFM were used to determine the influences of pretreatments on the crystalline properties and morphologies of CNCs. New methods, i.e., specific pretreatments followed by sulfuric acid hydrolysis or 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) oxidation, were developed to obtain sphere-like CNCs. It was found that sphere-like CNCs were more likely to be obtained from cellulose materials possessing high accessibility. Pretreatments produced cellulose with various crystallinities and polymorphs, and therefore changed the yields of CNCs and influenced their morphology. CNCs prepared by TEMPO oxidation generally had smaller size than the corresponding products obtained by sulfuric acid hydrolysis. In addition, for the dissolved/regenerated cellulose, TEMPO oxidation was a better method to yield sphere-like CNCs than sulfuric acid hydrolysis. More... »

PAGES

2427-2437

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10570-013-9997-0

DOI

http://dx.doi.org/10.1007/s10570-013-9997-0

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1005824231


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Turtle is a human-readable linked data format.

curl -H 'Accept: text/turtle' 'https://scigraph.springernature.com/pub.10.1007/s10570-013-9997-0'

RDF/XML is a standard XML format for linked data.

curl -H 'Accept: application/rdf+xml' 'https://scigraph.springernature.com/pub.10.1007/s10570-013-9997-0'


 

This table displays all metadata directly associated to this object as RDF triples.

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