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Electrosprayed PMMA microcapsules containing green soybean oil-based acrylated epoxy and a thiol: a novel resin for smart self-healing coatings

For the first time, the binary components of a self-healing epoxy system was developed comprising of a green acrylated epoxy resin and its thiol-based curing agent encapsulated in a poly (methyl methacrylate) (PMMA) shell by electrospraying technique. The field emission scanning electron microscopy...

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Main Authors: Ataei, Shahla, Hassan, Aziz, Azari, Pedram, Pingguan-Murphy, Belinda, Yahya, Rosiyah, Basirun, Wan Jefrey, Shahabudin, Nurshafiza
Format: Article
Published: IOP Publishing Ltd 2020
Subjects:
QD Chemistry
Online Access:http://eprints.um.edu.my/36506/
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spelling my.um.eprints.365062023-12-30T15:30:35Z http://eprints.um.edu.my/36506/ Electrosprayed PMMA microcapsules containing green soybean oil-based acrylated epoxy and a thiol: a novel resin for smart self-healing coatings Ataei, Shahla Hassan, Aziz Azari, Pedram Pingguan-Murphy, Belinda Yahya, Rosiyah Basirun, Wan Jefrey Shahabudin, Nurshafiza QD Chemistry For the first time, the binary components of a self-healing epoxy system was developed comprising of a green acrylated epoxy resin and its thiol-based curing agent encapsulated in a poly (methyl methacrylate) (PMMA) shell by electrospraying technique. The field emission scanning electron microscopy images revealed that the two microcapsules formed were almost spherical with rough and irregular surfaces. The average diameter of microcapsules ranged from 1.165 to 1.418 mu m for the two microcapsules. FTIR spectra and thermal analysis were used to investigate the encapsulation of acrylated epoxy resin and thiol curing agent in PMMA as well as the kinetics of crosslinking reaction between the two components. Based on FTIR spectra, the thiol curing agent was involved in the crosslinking reaction with the epoxy group (810 cm(-1)) and the C = C segment (1634 and 1613 cm(-1)) of acrylated epoxy resin. The DSC results indicated an exothermic peak (at 65 degrees C) proving that this system is efficient in self-healing epoxy resins for coating applications. Furthermore, the ability of epoxy coatings to protect the scratched coating substrate from corrosion media (the healing performance) without microcapsule, with dual microcapsules, single healing agent-containing microcapsule and single curing agent-containing microcapsule were also evaluated using potentiodynamic polarization tests and electrochemical impedance spectroscopy (EIS). The results were in line with the potentiodynamic polarization and the EIS. The highest self-healing efficiency (78%) was obtained for binary capsule concentration of 1%, indicating presence of sufficient amount of material to heal the cracks. IOP Publishing Ltd 2020-08 Article PeerReviewed Ataei, Shahla and Hassan, Aziz and Azari, Pedram and Pingguan-Murphy, Belinda and Yahya, Rosiyah and Basirun, Wan Jefrey and Shahabudin, Nurshafiza (2020) Electrosprayed PMMA microcapsules containing green soybean oil-based acrylated epoxy and a thiol: a novel resin for smart self-healing coatings. Smart Materials And Structures, 29 (8). ISSN 09641726, DOI https://doi.org/10.1088/1361-665X/ab9754 <https://doi.org/10.1088/1361-665X/ab9754>. 10.1088/1361-665X/ab9754
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic QD Chemistry
spellingShingle QD Chemistry
Ataei, Shahla
Hassan, Aziz
Azari, Pedram
Pingguan-Murphy, Belinda
Yahya, Rosiyah
Basirun, Wan Jefrey
Shahabudin, Nurshafiza
Electrosprayed PMMA microcapsules containing green soybean oil-based acrylated epoxy and a thiol: a novel resin for smart self-healing coatings
description For the first time, the binary components of a self-healing epoxy system was developed comprising of a green acrylated epoxy resin and its thiol-based curing agent encapsulated in a poly (methyl methacrylate) (PMMA) shell by electrospraying technique. The field emission scanning electron microscopy images revealed that the two microcapsules formed were almost spherical with rough and irregular surfaces. The average diameter of microcapsules ranged from 1.165 to 1.418 mu m for the two microcapsules. FTIR spectra and thermal analysis were used to investigate the encapsulation of acrylated epoxy resin and thiol curing agent in PMMA as well as the kinetics of crosslinking reaction between the two components. Based on FTIR spectra, the thiol curing agent was involved in the crosslinking reaction with the epoxy group (810 cm(-1)) and the C = C segment (1634 and 1613 cm(-1)) of acrylated epoxy resin. The DSC results indicated an exothermic peak (at 65 degrees C) proving that this system is efficient in self-healing epoxy resins for coating applications. Furthermore, the ability of epoxy coatings to protect the scratched coating substrate from corrosion media (the healing performance) without microcapsule, with dual microcapsules, single healing agent-containing microcapsule and single curing agent-containing microcapsule were also evaluated using potentiodynamic polarization tests and electrochemical impedance spectroscopy (EIS). The results were in line with the potentiodynamic polarization and the EIS. The highest self-healing efficiency (78%) was obtained for binary capsule concentration of 1%, indicating presence of sufficient amount of material to heal the cracks.
format Article
author Ataei, Shahla
Hassan, Aziz
Azari, Pedram
Pingguan-Murphy, Belinda
Yahya, Rosiyah
Basirun, Wan Jefrey
Shahabudin, Nurshafiza
author_facet Ataei, Shahla
Hassan, Aziz
Azari, Pedram
Pingguan-Murphy, Belinda
Yahya, Rosiyah
Basirun, Wan Jefrey
Shahabudin, Nurshafiza
author_sort Ataei, Shahla
title Electrosprayed PMMA microcapsules containing green soybean oil-based acrylated epoxy and a thiol: a novel resin for smart self-healing coatings
title_short Electrosprayed PMMA microcapsules containing green soybean oil-based acrylated epoxy and a thiol: a novel resin for smart self-healing coatings
title_full Electrosprayed PMMA microcapsules containing green soybean oil-based acrylated epoxy and a thiol: a novel resin for smart self-healing coatings
title_fullStr Electrosprayed PMMA microcapsules containing green soybean oil-based acrylated epoxy and a thiol: a novel resin for smart self-healing coatings
title_full_unstemmed Electrosprayed PMMA microcapsules containing green soybean oil-based acrylated epoxy and a thiol: a novel resin for smart self-healing coatings
title_sort electrosprayed pmma microcapsules containing green soybean oil-based acrylated epoxy and a thiol: a novel resin for smart self-healing coatings
publisher IOP Publishing Ltd
publishDate 2020
url http://eprints.um.edu.my/36506/
_version_ 1787133824545587200
score 13.211869

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