Preparation and characterization of Epoxy/Carbon nanofiber nanocomposites

In this Final Year Project, the effects of functionalization of carbon nanofibres on its mechanical and thermo-mechanical properties were studied. To this end, vapour-grown carbon nanofibres (VGCNF / CNF) were first functionalized via one-step arylation with in situ generated diazonium salts. Fourie...

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Main Author: Toh, Eric Weilong.
Other Authors: Lu Xuehong
Format: Final Year Project
Language:English
Published: 2013
Subjects:
Online Access:http://hdl.handle.net/10356/52111
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-521112023-03-04T15:39:02Z Preparation and characterization of Epoxy/Carbon nanofiber nanocomposites Toh, Eric Weilong. Lu Xuehong School of Materials Science and Engineering Advanced Materials Research Centre DRNTU::Engineering::Materials::Composite materials In this Final Year Project, the effects of functionalization of carbon nanofibres on its mechanical and thermo-mechanical properties were studied. To this end, vapour-grown carbon nanofibres (VGCNF / CNF) were first functionalized via one-step arylation with in situ generated diazonium salts. Fourier Transform Infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA) and elemental analysis were used to verify that triazole groups had been grafted onto the surface of the carbon nanofibres. The nanofibres were then incorporated in epoxy thermoset resins to form CNF/epoxy nanocomposites. Tensile testing, fracture toughness testing and dynamic mechanical analysis (DMA) testing were then carried out to determine the effect of functionalization the mechanical and thermo-mechanical properties of the nanocomposite. The data showed that modified CNFs (m-CNF) exhibited superior performance, particularly in terms of toughening. At 0.4 wt% filler loading level, m-CNF/epoxy nanocomposites have 41% and 80% higher critical stress intensity factor (KIc) and critical strain energy release rate (GIc) than neat epoxy resin respectively, versus 27% and 46% higher for p-CNF/epoxy. Experimentally obtained optical microscopy showed that the m-CNF exhibited less agglomeration in the epoxy matrix, while Field Emission Scanning Electron Microscopy (FESEM) data provided evidence of better interfacial interaction between the CNF and epoxy, both of which are posited as key factors for the enhanced mechanical properties exhibited by m-CNF/epoxy nanocomposites. Bachelor of Engineering (Materials Engineering) 2013-04-22T08:37:42Z 2013-04-22T08:37:42Z 2013 2013 Final Year Project (FYP) http://hdl.handle.net/10356/52111 en Nanyang Technological University 34 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Materials::Composite materials
spellingShingle DRNTU::Engineering::Materials::Composite materials
Toh, Eric Weilong.
Preparation and characterization of Epoxy/Carbon nanofiber nanocomposites
description In this Final Year Project, the effects of functionalization of carbon nanofibres on its mechanical and thermo-mechanical properties were studied. To this end, vapour-grown carbon nanofibres (VGCNF / CNF) were first functionalized via one-step arylation with in situ generated diazonium salts. Fourier Transform Infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA) and elemental analysis were used to verify that triazole groups had been grafted onto the surface of the carbon nanofibres. The nanofibres were then incorporated in epoxy thermoset resins to form CNF/epoxy nanocomposites. Tensile testing, fracture toughness testing and dynamic mechanical analysis (DMA) testing were then carried out to determine the effect of functionalization the mechanical and thermo-mechanical properties of the nanocomposite. The data showed that modified CNFs (m-CNF) exhibited superior performance, particularly in terms of toughening. At 0.4 wt% filler loading level, m-CNF/epoxy nanocomposites have 41% and 80% higher critical stress intensity factor (KIc) and critical strain energy release rate (GIc) than neat epoxy resin respectively, versus 27% and 46% higher for p-CNF/epoxy. Experimentally obtained optical microscopy showed that the m-CNF exhibited less agglomeration in the epoxy matrix, while Field Emission Scanning Electron Microscopy (FESEM) data provided evidence of better interfacial interaction between the CNF and epoxy, both of which are posited as key factors for the enhanced mechanical properties exhibited by m-CNF/epoxy nanocomposites.
author2 Lu Xuehong
author_facet Lu Xuehong
Toh, Eric Weilong.
format Final Year Project
author Toh, Eric Weilong.
author_sort Toh, Eric Weilong.
title Preparation and characterization of Epoxy/Carbon nanofiber nanocomposites
title_short Preparation and characterization of Epoxy/Carbon nanofiber nanocomposites
title_full Preparation and characterization of Epoxy/Carbon nanofiber nanocomposites
title_fullStr Preparation and characterization of Epoxy/Carbon nanofiber nanocomposites
title_full_unstemmed Preparation and characterization of Epoxy/Carbon nanofiber nanocomposites
title_sort preparation and characterization of epoxy/carbon nanofiber nanocomposites
publishDate 2013
url http://hdl.handle.net/10356/52111
_version_ 1759856071047905280