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Amphiphilic Cellulose Nanocrystals for Aqueous Processing of Thermoplastics

[Image: see text] Conventional composite formulation of cellulose nanocrystals (CNCs) with thermoplastics involves melt compounding or in situ polymerisation. In this rather unconventional approach, polypropylene (PP) microparticles were finely suspended and stabilized, at varying weight loadings, i...

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Autores principales: Onyianta, Amaka J., Etale, Anita, Koev, Todor T., Eloi, Jean-Charles, Khimyak, Yaroslav Z., Stephen J. Eichhorn
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9667462/
https://www.ncbi.nlm.nih.gov/pubmed/36405305
http://dx.doi.org/10.1021/acsapm.2c01623
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author Onyianta, Amaka J.
Etale, Anita
Koev, Todor T.
Eloi, Jean-Charles
Khimyak, Yaroslav Z.
Stephen J. Eichhorn,
author_facet Onyianta, Amaka J.
Etale, Anita
Koev, Todor T.
Eloi, Jean-Charles
Khimyak, Yaroslav Z.
Stephen J. Eichhorn,
author_sort Onyianta, Amaka J.
collection PubMed
description [Image: see text] Conventional composite formulation of cellulose nanocrystals (CNCs) with thermoplastics involves melt compounding or in situ polymerisation. In this rather unconventional approach, polypropylene (PP) microparticles were finely suspended and stabilized, at varying weight loadings, in aqueous suspensions of amphiphilic CNCs to enable adsorption of the nanoparticles onto the thermoplastic. In order to achieve these suspensions, CNCs were modified with either octyl or hexadecyl groups. These modifications imparted hydrophobic properties to the CNCs, hence increasing interfacial adhesion to the PP microparticles. The modification, however, also retained the sulfate half ester groups that ensured dispersibility in aqueous media. The CNCs were evidently coated on the PP microparticles as revealed by confocal microscope imaging and had no detrimental effect on the melt properties of the PP-based composites. The approach is demonstrated to increase the Young’s moduli of CNC-thermoplastic composites prepared in optimum suspension loadings of 0.5 wt. % octyl-modified and 0.1 wt % hexadecyl-modified CNCs. This procedure can be extended to other thermoplastics as the ability to aqueously process these composites is a major step forward in the drive for more sustainable manufacturing.
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spelling pubmed-96674622022-11-17 Amphiphilic Cellulose Nanocrystals for Aqueous Processing of Thermoplastics Onyianta, Amaka J. Etale, Anita Koev, Todor T. Eloi, Jean-Charles Khimyak, Yaroslav Z. Stephen J. Eichhorn, ACS Appl Polym Mater [Image: see text] Conventional composite formulation of cellulose nanocrystals (CNCs) with thermoplastics involves melt compounding or in situ polymerisation. In this rather unconventional approach, polypropylene (PP) microparticles were finely suspended and stabilized, at varying weight loadings, in aqueous suspensions of amphiphilic CNCs to enable adsorption of the nanoparticles onto the thermoplastic. In order to achieve these suspensions, CNCs were modified with either octyl or hexadecyl groups. These modifications imparted hydrophobic properties to the CNCs, hence increasing interfacial adhesion to the PP microparticles. The modification, however, also retained the sulfate half ester groups that ensured dispersibility in aqueous media. The CNCs were evidently coated on the PP microparticles as revealed by confocal microscope imaging and had no detrimental effect on the melt properties of the PP-based composites. The approach is demonstrated to increase the Young’s moduli of CNC-thermoplastic composites prepared in optimum suspension loadings of 0.5 wt. % octyl-modified and 0.1 wt % hexadecyl-modified CNCs. This procedure can be extended to other thermoplastics as the ability to aqueously process these composites is a major step forward in the drive for more sustainable manufacturing. American Chemical Society 2022-11-01 2022-11-11 /pmc/articles/PMC9667462/ /pubmed/36405305 http://dx.doi.org/10.1021/acsapm.2c01623 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Onyianta, Amaka J.
Etale, Anita
Koev, Todor T.
Eloi, Jean-Charles
Khimyak, Yaroslav Z.
Stephen J. Eichhorn,
Amphiphilic Cellulose Nanocrystals for Aqueous Processing of Thermoplastics
title Amphiphilic Cellulose Nanocrystals for Aqueous Processing of Thermoplastics
title_full Amphiphilic Cellulose Nanocrystals for Aqueous Processing of Thermoplastics
title_fullStr Amphiphilic Cellulose Nanocrystals for Aqueous Processing of Thermoplastics
title_full_unstemmed Amphiphilic Cellulose Nanocrystals for Aqueous Processing of Thermoplastics
title_short Amphiphilic Cellulose Nanocrystals for Aqueous Processing of Thermoplastics
title_sort amphiphilic cellulose nanocrystals for aqueous processing of thermoplastics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9667462/
https://www.ncbi.nlm.nih.gov/pubmed/36405305
http://dx.doi.org/10.1021/acsapm.2c01623
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