Investigation of the strain sensing performance of 3D-printed electrically conductive polymeric nanocomposites

Selective laser sintering (SLS) is an additive manufacturing (AM) technology that is widely used to create complicated three-dimensional (3D) parts. Although researchers have been studying the performance of various types of powder materials, there are only a few commercially available polymers for...

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Main Author: Koh, Peng Hoi
Other Authors: Zhou Kun
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2022
Subjects:
Online Access:https://hdl.handle.net/10356/158591
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1585912022-06-06T01:51:02Z Investigation of the strain sensing performance of 3D-printed electrically conductive polymeric nanocomposites Koh, Peng Hoi Zhou Kun School of Mechanical and Aerospace Engineering kzhou@ntu.edu.sg Engineering::Mechanical engineering Engineering::Materials::Material testing and characterization Selective laser sintering (SLS) is an additive manufacturing (AM) technology that is widely used to create complicated three-dimensional (3D) parts. Although researchers have been studying the performance of various types of powder materials, there are only a few commercially available polymers for SLS. Flexible strain sensors and their sensing capability have been appealing in human motion detection applications, since wearable electronic devices have become increasingly popular, especially for medical applications. Consequently, in this final year project, SLS 3D printing technology was utilized to fabricate electrically conductive polymeric nanocomposites. The electrically conductive polymeric nanocomposites were prepared with carbon nanotubes (CNTs) at a concentration of 2 wt%, wrapped thermoplastic polyurethane (TPU) powders. The strain sensing performance of the 3D fabricated CNT/TPU nanocomposite specimens was investigated further to evaluate their mechanical and electrical properties under tensile deformation and bending motion. The mechanical performance of specimens printed in the y-direction was found to be greater than specimens printed in the x and z-directions. Furthermore, the y-direction-printed CNT/TPU specimens displayed a significant stretchability, with an average strain of about 75%. The mechanical properties of SLS-fabricated 2 wt% CNT/TPU nanocomposites, such as the ultimate tensile strength (UTS) and the Young’s modulus, were considerably good. Both the x and y-direction-printed nanocomposites showed a relatively high gauge factor value, indicating that they are sensitive to applied strain. They responded rapidly to bending and unbending actions, paving the possibility for SLS 3D printing technology to be used to fabricate wearable electrical devices. Bachelor of Engineering (Mechanical Engineering) 2022-06-06T01:51:01Z 2022-06-06T01:51:01Z 2022 Final Year Project (FYP) Koh, P. H. (2022). Investigation of the strain sensing performance of 3D-printed electrically conductive polymeric nanocomposites. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/158591 https://hdl.handle.net/10356/158591 en A237 application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Mechanical engineering
Engineering::Materials::Material testing and characterization
spellingShingle Engineering::Mechanical engineering
Engineering::Materials::Material testing and characterization
Koh, Peng Hoi
Investigation of the strain sensing performance of 3D-printed electrically conductive polymeric nanocomposites
description Selective laser sintering (SLS) is an additive manufacturing (AM) technology that is widely used to create complicated three-dimensional (3D) parts. Although researchers have been studying the performance of various types of powder materials, there are only a few commercially available polymers for SLS. Flexible strain sensors and their sensing capability have been appealing in human motion detection applications, since wearable electronic devices have become increasingly popular, especially for medical applications. Consequently, in this final year project, SLS 3D printing technology was utilized to fabricate electrically conductive polymeric nanocomposites. The electrically conductive polymeric nanocomposites were prepared with carbon nanotubes (CNTs) at a concentration of 2 wt%, wrapped thermoplastic polyurethane (TPU) powders. The strain sensing performance of the 3D fabricated CNT/TPU nanocomposite specimens was investigated further to evaluate their mechanical and electrical properties under tensile deformation and bending motion. The mechanical performance of specimens printed in the y-direction was found to be greater than specimens printed in the x and z-directions. Furthermore, the y-direction-printed CNT/TPU specimens displayed a significant stretchability, with an average strain of about 75%. The mechanical properties of SLS-fabricated 2 wt% CNT/TPU nanocomposites, such as the ultimate tensile strength (UTS) and the Young’s modulus, were considerably good. Both the x and y-direction-printed nanocomposites showed a relatively high gauge factor value, indicating that they are sensitive to applied strain. They responded rapidly to bending and unbending actions, paving the possibility for SLS 3D printing technology to be used to fabricate wearable electrical devices.
author2 Zhou Kun
author_facet Zhou Kun
Koh, Peng Hoi
format Final Year Project
author Koh, Peng Hoi
author_sort Koh, Peng Hoi
title Investigation of the strain sensing performance of 3D-printed electrically conductive polymeric nanocomposites
title_short Investigation of the strain sensing performance of 3D-printed electrically conductive polymeric nanocomposites
title_full Investigation of the strain sensing performance of 3D-printed electrically conductive polymeric nanocomposites
title_fullStr Investigation of the strain sensing performance of 3D-printed electrically conductive polymeric nanocomposites
title_full_unstemmed Investigation of the strain sensing performance of 3D-printed electrically conductive polymeric nanocomposites
title_sort investigation of the strain sensing performance of 3d-printed electrically conductive polymeric nanocomposites
publisher Nanyang Technological University
publishDate 2022
url https://hdl.handle.net/10356/158591
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