Cargando…
Quantitative analysis of the distribution and mixing of cellulose nanocrystals in thermoplastic composites using Raman chemical imaging
Cellulose nanofibers hold much promise for enhancing the mechanical properties of composites owing to their uniquely high stiffness and strength. One major issue limiting this performance however is the dispersion and mixing of cellulose nanofibers within thermoplastic resins. A combination of Raman...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2018
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9088214/ https://www.ncbi.nlm.nih.gov/pubmed/35547896 http://dx.doi.org/10.1039/c8ra06674d |
_version_ | 1784704320647725056 |
---|---|
author | Lewandowska, Anna E. Inai, Nor H. Ghita, Oana R. Eichhorn, Stephen J. |
author_facet | Lewandowska, Anna E. Inai, Nor H. Ghita, Oana R. Eichhorn, Stephen J. |
author_sort | Lewandowska, Anna E. |
collection | PubMed |
description | Cellulose nanofibers hold much promise for enhancing the mechanical properties of composites owing to their uniquely high stiffness and strength. One major issue limiting this performance however is the dispersion and mixing of cellulose nanofibers within thermoplastic resins. A combination of Raman imaging and chemical analysis has been used to quantify the distribution and mixing of cellulose nanocrystals (CNCs) in a polyethylene-matrix composite. Large area spectral imaging provides information about the effect of a compatibilizer – namely poly(ethylene oxide) (PEO) and maleated polyethylene (MAPE) – on the distribution of CNCs in the thermoplastic matrix. High-resolution images enable quantification of the degree of mixing between the CNCs and HDPE. Lower resolution images, but with greater spatial spread, allow quantification of the distribution of the CNCs. It is shown that the CNCs tend to agglomerate, with little increase in distribution even with the use of the compatibilizer. A shift in the position of characteristic Raman bands indicates the formation of hydrogen bonding between the PEO compatibilizer and the CNCs, which in turn is thought to affect the distribution of aggregates of the reinforcing phase. |
format | Online Article Text |
id | pubmed-9088214 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90882142022-05-10 Quantitative analysis of the distribution and mixing of cellulose nanocrystals in thermoplastic composites using Raman chemical imaging Lewandowska, Anna E. Inai, Nor H. Ghita, Oana R. Eichhorn, Stephen J. RSC Adv Chemistry Cellulose nanofibers hold much promise for enhancing the mechanical properties of composites owing to their uniquely high stiffness and strength. One major issue limiting this performance however is the dispersion and mixing of cellulose nanofibers within thermoplastic resins. A combination of Raman imaging and chemical analysis has been used to quantify the distribution and mixing of cellulose nanocrystals (CNCs) in a polyethylene-matrix composite. Large area spectral imaging provides information about the effect of a compatibilizer – namely poly(ethylene oxide) (PEO) and maleated polyethylene (MAPE) – on the distribution of CNCs in the thermoplastic matrix. High-resolution images enable quantification of the degree of mixing between the CNCs and HDPE. Lower resolution images, but with greater spatial spread, allow quantification of the distribution of the CNCs. It is shown that the CNCs tend to agglomerate, with little increase in distribution even with the use of the compatibilizer. A shift in the position of characteristic Raman bands indicates the formation of hydrogen bonding between the PEO compatibilizer and the CNCs, which in turn is thought to affect the distribution of aggregates of the reinforcing phase. The Royal Society of Chemistry 2018-10-19 /pmc/articles/PMC9088214/ /pubmed/35547896 http://dx.doi.org/10.1039/c8ra06674d Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/ |
spellingShingle | Chemistry Lewandowska, Anna E. Inai, Nor H. Ghita, Oana R. Eichhorn, Stephen J. Quantitative analysis of the distribution and mixing of cellulose nanocrystals in thermoplastic composites using Raman chemical imaging |
title | Quantitative analysis of the distribution and mixing of cellulose nanocrystals in thermoplastic composites using Raman chemical imaging |
title_full | Quantitative analysis of the distribution and mixing of cellulose nanocrystals in thermoplastic composites using Raman chemical imaging |
title_fullStr | Quantitative analysis of the distribution and mixing of cellulose nanocrystals in thermoplastic composites using Raman chemical imaging |
title_full_unstemmed | Quantitative analysis of the distribution and mixing of cellulose nanocrystals in thermoplastic composites using Raman chemical imaging |
title_short | Quantitative analysis of the distribution and mixing of cellulose nanocrystals in thermoplastic composites using Raman chemical imaging |
title_sort | quantitative analysis of the distribution and mixing of cellulose nanocrystals in thermoplastic composites using raman chemical imaging |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9088214/ https://www.ncbi.nlm.nih.gov/pubmed/35547896 http://dx.doi.org/10.1039/c8ra06674d |
work_keys_str_mv | AT lewandowskaannae quantitativeanalysisofthedistributionandmixingofcellulosenanocrystalsinthermoplasticcompositesusingramanchemicalimaging AT inainorh quantitativeanalysisofthedistributionandmixingofcellulosenanocrystalsinthermoplasticcompositesusingramanchemicalimaging AT ghitaoanar quantitativeanalysisofthedistributionandmixingofcellulosenanocrystalsinthermoplasticcompositesusingramanchemicalimaging AT eichhornstephenj quantitativeanalysisofthedistributionandmixingofcellulosenanocrystalsinthermoplasticcompositesusingramanchemicalimaging |