Quantification of energy input required for chitin nanocrystal aggregate size reduction through ultrasound

Abstract Nanoparticles have been claimed to contribute efficiently to e.g. the mechanical strength of composite materials when present as individual particles. However, these particles tend to aggregate. In this paper we prepare nanocrystals from chitin, a product with high potential added value for...

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Autores principales:	Ivanna Colijn, Remco Fokkink, Karin Schroën
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2d9660501e4b4e0b9a763b8da268623a
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spelling	oai:doaj.org-article:2d9660501e4b4e0b9a763b8da268623a2021-12-02T18:53:14ZQuantification of energy input required for chitin nanocrystal aggregate size reduction through ultrasound10.1038/s41598-021-96657-12045-2322https://doaj.org/article/2d9660501e4b4e0b9a763b8da268623a2021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-96657-1https://doaj.org/toc/2045-2322Abstract Nanoparticles have been claimed to contribute efficiently to e.g. the mechanical strength of composite materials when present as individual particles. However, these particles tend to aggregate. In this paper we prepare nanocrystals from chitin, a product with high potential added value for application in bio-based materials, and investigate the effect of ultrasound on de-aggregation. Chitin nanocrystals with a length ~ 200 nm and a diameter ~ 15 nm, were obtained via acid hydrolysis of crude chitin powder. Freeze drying resulted in severe aggregation and after redispersion sizes up to ~ 200 µm were found. Ultrasound treatment was applied and break up behaviour was investigated using static light scattering, dynamic light scattering, and laser diffraction. Our results suggest that the cumulative energy input was the dominant factor for chitin nanocrystal aggregate breakup. When a critical energy barrier of ~ 100 kJ/g chitin nanocrystals was exceeded, the chitin nanocrystal aggregates broke down to nanometre range. The break up was mostly a result of fragmentation: the aggregation energy of chitin nanocrystal aggregates was quantified to be ~ 370 kJ/g chitin nanocrystals and we hypothesize that mainly van der Waals interactions and hydrogen bonds are responsible for aggregation.Ivanna ColijnRemco FokkinkKarin SchroënNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ivanna Colijn Remco Fokkink Karin Schroën Quantification of energy input required for chitin nanocrystal aggregate size reduction through ultrasound
description	Abstract Nanoparticles have been claimed to contribute efficiently to e.g. the mechanical strength of composite materials when present as individual particles. However, these particles tend to aggregate. In this paper we prepare nanocrystals from chitin, a product with high potential added value for application in bio-based materials, and investigate the effect of ultrasound on de-aggregation. Chitin nanocrystals with a length ~ 200 nm and a diameter ~ 15 nm, were obtained via acid hydrolysis of crude chitin powder. Freeze drying resulted in severe aggregation and after redispersion sizes up to ~ 200 µm were found. Ultrasound treatment was applied and break up behaviour was investigated using static light scattering, dynamic light scattering, and laser diffraction. Our results suggest that the cumulative energy input was the dominant factor for chitin nanocrystal aggregate breakup. When a critical energy barrier of ~ 100 kJ/g chitin nanocrystals was exceeded, the chitin nanocrystal aggregates broke down to nanometre range. The break up was mostly a result of fragmentation: the aggregation energy of chitin nanocrystal aggregates was quantified to be ~ 370 kJ/g chitin nanocrystals and we hypothesize that mainly van der Waals interactions and hydrogen bonds are responsible for aggregation.
format	article
author	Ivanna Colijn Remco Fokkink Karin Schroën
author_facet	Ivanna Colijn Remco Fokkink Karin Schroën
author_sort	Ivanna Colijn
title	Quantification of energy input required for chitin nanocrystal aggregate size reduction through ultrasound
title_short	Quantification of energy input required for chitin nanocrystal aggregate size reduction through ultrasound
title_full	Quantification of energy input required for chitin nanocrystal aggregate size reduction through ultrasound
title_fullStr	Quantification of energy input required for chitin nanocrystal aggregate size reduction through ultrasound
title_full_unstemmed	Quantification of energy input required for chitin nanocrystal aggregate size reduction through ultrasound
title_sort	quantification of energy input required for chitin nanocrystal aggregate size reduction through ultrasound
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/2d9660501e4b4e0b9a763b8da268623a
work_keys_str_mv	AT ivannacolijn quantificationofenergyinputrequiredforchitinnanocrystalaggregatesizereductionthroughultrasound AT remcofokkink quantificationofenergyinputrequiredforchitinnanocrystalaggregatesizereductionthroughultrasound AT karinschroen quantificationofenergyinputrequiredforchitinnanocrystalaggregatesizereductionthroughultrasound
_version_	1718377317616582656

Quantification of energy input required for chitin nanocrystal aggregate size reduction through ultrasound

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