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High Performance PA 6/Cellulose Nanocomposites in the Interest of Industrial Scale Melt Processing

On an industrial scale, it is a challenge to achieve cellulose based nanocomposites due to dispersion issues and high process temperatures sensitivity. The current study describes methods to develop mechanically strong and thermally stable polyamide 6 (PA 6) and cellulose nanofibers (CNF) composites...

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Autores principales: Sridhara, Pruthvi K., Vilaseca, Fabiola
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8124158/
https://www.ncbi.nlm.nih.gov/pubmed/34066567
http://dx.doi.org/10.3390/polym13091495
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author Sridhara, Pruthvi K.
Vilaseca, Fabiola
author_facet Sridhara, Pruthvi K.
Vilaseca, Fabiola
author_sort Sridhara, Pruthvi K.
collection PubMed
description On an industrial scale, it is a challenge to achieve cellulose based nanocomposites due to dispersion issues and high process temperatures sensitivity. The current study describes methods to develop mechanically strong and thermally stable polyamide 6 (PA 6) and cellulose nanofibers (CNF) composites capable of tolerating high processing temperatures. With PA 6 being a very technical polymer matrix to be reinforced with CNF, good dispersion can be achieved with a high speed kinetic mixer and also shield the CNF from excess thermal degradation by implementing extremely short processing time. This paper presents an industrially feasible method to produce PA 6/CNF nanocomposites with high CNF composition processed by a high speed kinetic mixer (GELIMAT(®)) followed by compression molding to obtain a homogenous and thermally stable nanocomposites aimed at high performance applications. PA 6 was reinforced with three different wt % formulations (5, 15 and 25 wt %) of cellulose nanofibers. The resulting nanocomposites exhibited significant increase in Young’s modulus and ultimate strength with CNF content, owing to the effective melt processing and the surface charge density of the CNF, which necessitated the dispersion. The thermal stability and polymer crystallinity with respect to CNF composition for the PA 6/CNF nanocomposites were examined by TGA and DSC analysis. Rheology studies indicated that viscosity of the composites increased with increase in CNF composition. Overall, this work demonstrates industrially viable manufacturing processes to fabricate high performance PA 6/CNF nanocomposites.
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spelling pubmed-81241582021-05-17 High Performance PA 6/Cellulose Nanocomposites in the Interest of Industrial Scale Melt Processing Sridhara, Pruthvi K. Vilaseca, Fabiola Polymers (Basel) Article On an industrial scale, it is a challenge to achieve cellulose based nanocomposites due to dispersion issues and high process temperatures sensitivity. The current study describes methods to develop mechanically strong and thermally stable polyamide 6 (PA 6) and cellulose nanofibers (CNF) composites capable of tolerating high processing temperatures. With PA 6 being a very technical polymer matrix to be reinforced with CNF, good dispersion can be achieved with a high speed kinetic mixer and also shield the CNF from excess thermal degradation by implementing extremely short processing time. This paper presents an industrially feasible method to produce PA 6/CNF nanocomposites with high CNF composition processed by a high speed kinetic mixer (GELIMAT(®)) followed by compression molding to obtain a homogenous and thermally stable nanocomposites aimed at high performance applications. PA 6 was reinforced with three different wt % formulations (5, 15 and 25 wt %) of cellulose nanofibers. The resulting nanocomposites exhibited significant increase in Young’s modulus and ultimate strength with CNF content, owing to the effective melt processing and the surface charge density of the CNF, which necessitated the dispersion. The thermal stability and polymer crystallinity with respect to CNF composition for the PA 6/CNF nanocomposites were examined by TGA and DSC analysis. Rheology studies indicated that viscosity of the composites increased with increase in CNF composition. Overall, this work demonstrates industrially viable manufacturing processes to fabricate high performance PA 6/CNF nanocomposites. MDPI 2021-05-06 /pmc/articles/PMC8124158/ /pubmed/34066567 http://dx.doi.org/10.3390/polym13091495 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Sridhara, Pruthvi K.
Vilaseca, Fabiola
High Performance PA 6/Cellulose Nanocomposites in the Interest of Industrial Scale Melt Processing
title High Performance PA 6/Cellulose Nanocomposites in the Interest of Industrial Scale Melt Processing
title_full High Performance PA 6/Cellulose Nanocomposites in the Interest of Industrial Scale Melt Processing
title_fullStr High Performance PA 6/Cellulose Nanocomposites in the Interest of Industrial Scale Melt Processing
title_full_unstemmed High Performance PA 6/Cellulose Nanocomposites in the Interest of Industrial Scale Melt Processing
title_short High Performance PA 6/Cellulose Nanocomposites in the Interest of Industrial Scale Melt Processing
title_sort high performance pa 6/cellulose nanocomposites in the interest of industrial scale melt processing
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8124158/
https://www.ncbi.nlm.nih.gov/pubmed/34066567
http://dx.doi.org/10.3390/polym13091495
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