Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Insight into thermal stability of cellulose nanocrystals from new hydrolysis methods with acid blends
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.
Show others and affiliations
2019 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 26, no 1, p. 507-528Article in journal (Refereed) Published
Abstract [en]

Abstract: This study provides insight into the thermal degradation of cotton cellulose nanocrystals (CNCs) by tuning their physico-chemical properties through acid hydrolysis using blends of phosphoric and sulfuric acid. CNCs isolated by sulfuric acid hydrolysis are known to degrade at lower temperatures than CNCs hydrolyzed with phosphoric acid; however, the reason for this change is unclear. Although all CNCs are inherently relatively thermally stable, their application in polymer composites and liquid formulations designed to function at high temperatures could be extended if thermal stability was improved. Herein, thermogravimetric analysis was carried out on six types of CNCs (in both acid and sodium form) with different surface chemistry, surface charge density, dimensions, crystallinity and degree of polymerization (DP) to identify the key properties that influence thermal stability of nanocellulose. In acid form, CNC surface charge density was found to be the determining factor in thermal stability due to de-esterification and acid-catalyzed degradation. Conversely, in sodium form, surface chemistry and charge density had a negligible effect on the onset of thermal degradation, however, the DP of the cellulose polymer chains highly influenced stability. The presence of more reducing ends in lower DP nanocrystals is inferred to facilitate thermally-induced depolymerization and degradation. Degree of crystallinity did not significantly affect CNC thermal stability. Studying CNCs produced from single or blends of acids (and changing the counterion) elucidated the thermal behavior of cellulose and furthermore demonstrated new routes to tailor CNCs thermal and colloidal stability. Graphical abstract: [Figure not available: see fulltext.].

Place, publisher, year, edition, pages
Springer Netherlands , 2019. Vol. 26, no 1, p. 507-528
Keywords [en]
Acid hydrolysis, Cellulose nanocrystals, Degree of polymerization, Nanocellulose, Phosphoric acid, Thermal stability, Cellulose, Charge density, Chemical analysis, Degradation, Hydrolysis, Nanocrystals, Polymerization, Sodium, Stability, Sulfuric acid, Surface chemistry, Thermodynamic stability, Thermogravimetric analysis, Acid-catalyzed degradation, Cellulose nano-crystals, Degree of crystallinity, Liquid formulations, Physicochemical property, Sulfuric acid hydrolysis, Cellulose derivatives, Gravimetry, Thermal Analysis
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-248282DOI: 10.1007/s10570-018-2175-7ISI: 000458742600027Scopus ID: 2-s2.0-85058103428OAI: oai:DiVA.org:kth-248282DiVA, id: diva2:1302586
Note

QC 20190405

Available from: 2019-04-05 Created: 2019-04-05 Last updated: 2019-04-05Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records BETA

Reid, Michael S.

Search in DiVA

By author/editor
Reid, Michael S.
By organisation
Fibre- and Polymer Technology
In the same journal
Cellulose (London)
Chemical Engineering

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 24 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf