Novel humidity sensors based on nanomodified Portland cement

Abstract Commonly used humidity sensors are based on metal oxides, polymers or carbon. Their sensing accuracy often deteriorates with time, especially when exposed to higher temperatures or very high humidity. An alternative solution based on the utilization of Portland cement-based mortars containi...

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Autores principales:	Thanyarat Buasiri, Karin Habermehl-Cwirzen, Lukasz Krzeminski, Andrzej Cwirzen
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a6df75cfad0a48e18ec9f77566bb4d2e
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spelling	oai:doaj.org-article:a6df75cfad0a48e18ec9f77566bb4d2e2021-12-02T18:03:21ZNovel humidity sensors based on nanomodified Portland cement10.1038/s41598-021-87563-72045-2322https://doaj.org/article/a6df75cfad0a48e18ec9f77566bb4d2e2021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87563-7https://doaj.org/toc/2045-2322Abstract Commonly used humidity sensors are based on metal oxides, polymers or carbon. Their sensing accuracy often deteriorates with time, especially when exposed to higher temperatures or very high humidity. An alternative solution based on the utilization of Portland cement-based mortars containing in-situ grown carbon nanofibers (CNFs) was evaluated in this study. The relationship between the electrical resistivity, CNF content and humidity were determined. The highest sensitivity was observed for samples containing 10 wt.% of the nanomodified cement which corresponded to 0.27 wt.% of CNFs. The highest calculated sensitivity was approximately 0.01024 per 1% change in relative humidity (RH). The measured electrical resistivity is a linear function of the RH in the humidity range between 11 and 97%. The percolation threshold value was estimated to be at around 7 wt.% of the nanomodified cement, corresponding to ~ 0.19 wt.% of CNFs.Thanyarat BuasiriKarin Habermehl-CwirzenLukasz KrzeminskiAndrzej CwirzenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Thanyarat Buasiri Karin Habermehl-Cwirzen Lukasz Krzeminski Andrzej Cwirzen Novel humidity sensors based on nanomodified Portland cement
description	Abstract Commonly used humidity sensors are based on metal oxides, polymers or carbon. Their sensing accuracy often deteriorates with time, especially when exposed to higher temperatures or very high humidity. An alternative solution based on the utilization of Portland cement-based mortars containing in-situ grown carbon nanofibers (CNFs) was evaluated in this study. The relationship between the electrical resistivity, CNF content and humidity were determined. The highest sensitivity was observed for samples containing 10 wt.% of the nanomodified cement which corresponded to 0.27 wt.% of CNFs. The highest calculated sensitivity was approximately 0.01024 per 1% change in relative humidity (RH). The measured electrical resistivity is a linear function of the RH in the humidity range between 11 and 97%. The percolation threshold value was estimated to be at around 7 wt.% of the nanomodified cement, corresponding to ~ 0.19 wt.% of CNFs.
format	article
author	Thanyarat Buasiri Karin Habermehl-Cwirzen Lukasz Krzeminski Andrzej Cwirzen
author_facet	Thanyarat Buasiri Karin Habermehl-Cwirzen Lukasz Krzeminski Andrzej Cwirzen
author_sort	Thanyarat Buasiri
title	Novel humidity sensors based on nanomodified Portland cement
title_short	Novel humidity sensors based on nanomodified Portland cement
title_full	Novel humidity sensors based on nanomodified Portland cement
title_fullStr	Novel humidity sensors based on nanomodified Portland cement
title_full_unstemmed	Novel humidity sensors based on nanomodified Portland cement
title_sort	novel humidity sensors based on nanomodified portland cement
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/a6df75cfad0a48e18ec9f77566bb4d2e
work_keys_str_mv	AT thanyaratbuasiri novelhumiditysensorsbasedonnanomodifiedportlandcement AT karinhabermehlcwirzen novelhumiditysensorsbasedonnanomodifiedportlandcement AT lukaszkrzeminski novelhumiditysensorsbasedonnanomodifiedportlandcement AT andrzejcwirzen novelhumiditysensorsbasedonnanomodifiedportlandcement
_version_	1718378770733203456

Novel humidity sensors based on nanomodified Portland cement

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