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The Effect of Pore Volume on the Behavior of Polyurethane-Foam-Based Pressure Sensors

In this work, three different polyurethane (PU) foams were prepared by mixing commonly used isocyanate and polyol with different isocyanate indices (1.0:0.8, 1.0:1.0, 1.0:1.1). Then, the prepared polyurethane foam samples were coated by dip-coating with a fixed ratio of nitrogen-doped, bamboo-shaped...

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Autores principales: Nabeel, Mohammed, Varga, Miklós, Kuzsella, László, Fiser, Béla, Vanyorek, László, Viskolcz, Béla
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9459917/
https://www.ncbi.nlm.nih.gov/pubmed/36080726
http://dx.doi.org/10.3390/polym14173652
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author Nabeel, Mohammed
Varga, Miklós
Kuzsella, László
Fiser, Béla
Vanyorek, László
Viskolcz, Béla
author_facet Nabeel, Mohammed
Varga, Miklós
Kuzsella, László
Fiser, Béla
Vanyorek, László
Viskolcz, Béla
author_sort Nabeel, Mohammed
collection PubMed
description In this work, three different polyurethane (PU) foams were prepared by mixing commonly used isocyanate and polyol with different isocyanate indices (1.0:0.8, 1.0:1.0, 1.0:1.1). Then, the prepared polyurethane foam samples were coated by dip-coating with a fixed ratio of nitrogen-doped, bamboo-shaped carbon nanotubes (N-BCNTs) to obtain pressure sensor systems. The effect of the isocyanate index on the initial resistance, pressure sensitivity, gauge factor (GF), and repeatability of the N-BCNT/PU pressure sensor systems was studied. The pore volume was crucial in finetuning the PU-foam-based sensors ability to detect large strain. Furthermore, large pore volume provides suitable spatial pores for elastic deformation. Sensors with large pore volume can detect pressure of less than 3 kPa, which could be related to their sensitivity in the high range. Moreover, by increasing the pore volume, the electrical percolation threshold can be achieved with a minimal addition of nanofillers. On the other hand, PU with a smaller pore volume is more suitable to detect pressure above 3 kPa. The developed sensors have been successfully applied in many applications, such as motion monitoring and vibration detection.
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spelling pubmed-94599172022-09-10 The Effect of Pore Volume on the Behavior of Polyurethane-Foam-Based Pressure Sensors Nabeel, Mohammed Varga, Miklós Kuzsella, László Fiser, Béla Vanyorek, László Viskolcz, Béla Polymers (Basel) Article In this work, three different polyurethane (PU) foams were prepared by mixing commonly used isocyanate and polyol with different isocyanate indices (1.0:0.8, 1.0:1.0, 1.0:1.1). Then, the prepared polyurethane foam samples were coated by dip-coating with a fixed ratio of nitrogen-doped, bamboo-shaped carbon nanotubes (N-BCNTs) to obtain pressure sensor systems. The effect of the isocyanate index on the initial resistance, pressure sensitivity, gauge factor (GF), and repeatability of the N-BCNT/PU pressure sensor systems was studied. The pore volume was crucial in finetuning the PU-foam-based sensors ability to detect large strain. Furthermore, large pore volume provides suitable spatial pores for elastic deformation. Sensors with large pore volume can detect pressure of less than 3 kPa, which could be related to their sensitivity in the high range. Moreover, by increasing the pore volume, the electrical percolation threshold can be achieved with a minimal addition of nanofillers. On the other hand, PU with a smaller pore volume is more suitable to detect pressure above 3 kPa. The developed sensors have been successfully applied in many applications, such as motion monitoring and vibration detection. MDPI 2022-09-02 /pmc/articles/PMC9459917/ /pubmed/36080726 http://dx.doi.org/10.3390/polym14173652 Text en © 2022 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
Nabeel, Mohammed
Varga, Miklós
Kuzsella, László
Fiser, Béla
Vanyorek, László
Viskolcz, Béla
The Effect of Pore Volume on the Behavior of Polyurethane-Foam-Based Pressure Sensors
title The Effect of Pore Volume on the Behavior of Polyurethane-Foam-Based Pressure Sensors
title_full The Effect of Pore Volume on the Behavior of Polyurethane-Foam-Based Pressure Sensors
title_fullStr The Effect of Pore Volume on the Behavior of Polyurethane-Foam-Based Pressure Sensors
title_full_unstemmed The Effect of Pore Volume on the Behavior of Polyurethane-Foam-Based Pressure Sensors
title_short The Effect of Pore Volume on the Behavior of Polyurethane-Foam-Based Pressure Sensors
title_sort effect of pore volume on the behavior of polyurethane-foam-based pressure sensors
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9459917/
https://www.ncbi.nlm.nih.gov/pubmed/36080726
http://dx.doi.org/10.3390/polym14173652
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