Self-healing epoxy coating synthesis by embedment of metal 2-methyl imidazole and acetylacetonate complexes with microcapsules

The restoration of mechanical properties is desired for creating the self-healing coatings with no corrosion capabilities. The encapsulation of epoxy resins is limited by various factors in urea and melamine formaldehyde microcapsules. An improved method was developed, where epoxy resin was encapsul...

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Main Authors: Ullah, H., Qureshi, K.S., Khan, U., Zaffar, M., Yang, Y.J., Rabat, N.E., Khan, M.I., Saqib, S., Mukhtar, A., Ullah, S., Mubashir, M., Bokhari, A., Chai, W.S., Chew, K.W., Show, P.L.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.29672 /
Published: Elsevier Ltd 2021
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85109661371&doi=10.1016%2fj.chemosphere.2021.131492&partnerID=40&md5=371e0246713ae65f4df7dc30f9b242b3
http://eprints.utp.edu.my/29672/
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spelling utp-eprints.296722022-03-25T02:29:53Z Self-healing epoxy coating synthesis by embedment of metal 2-methyl imidazole and acetylacetonate complexes with microcapsules Ullah, H. Qureshi, K.S. Khan, U. Zaffar, M. Yang, Y.J. Rabat, N.E. Khan, M.I. Saqib, S. Mukhtar, A. Ullah, S. Mubashir, M. Bokhari, A. Chai, W.S. Chew, K.W. Show, P.L. The restoration of mechanical properties is desired for creating the self-healing coatings with no corrosion capabilities. The encapsulation of epoxy resins is limited by various factors in urea and melamine formaldehyde microcapsules. An improved method was developed, where epoxy resin was encapsulated by individual wrapping of poly(melamine-formaldehyde) and poly(urea-formaldehyde) shell around emulsified epoxy droplets via oil-in-water emulsion polymerization method. The synthesized materials were characterized analytically. The curing of the epoxy was achieved by adding the Ni/Co(2-MI)6.2NO3 as a latent hardener and iron acetylacetonate Fe(acac)3 as a latent accelerator. Isothermal and non-isothermal differential scanning calorimetric analysis revealed lower curing temperature (Tonset = 116 °C) and lower activation energies (Ea � 69�75 kJ/mol). The addition of microcapsules and complexes did not adversely alter the flexural strength and flexural modulus of the epoxy coatings. The adhesion strength of neat coating decreased from 6310.8 ± 31 to 4720.9 ± 60 kPa and percent healing increased from 50.83 to 67.45% in the presence of acetylacetonate complex at 10 wt% of microcapsules. © 2021 Elsevier Ltd Elsevier Ltd 2021 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85109661371&doi=10.1016%2fj.chemosphere.2021.131492&partnerID=40&md5=371e0246713ae65f4df7dc30f9b242b3 Ullah, H. and Qureshi, K.S. and Khan, U. and Zaffar, M. and Yang, Y.J. and Rabat, N.E. and Khan, M.I. and Saqib, S. and Mukhtar, A. and Ullah, S. and Mubashir, M. and Bokhari, A. and Chai, W.S. and Chew, K.W. and Show, P.L. (2021) Self-healing epoxy coating synthesis by embedment of metal 2-methyl imidazole and acetylacetonate complexes with microcapsules. Chemosphere, 285 . http://eprints.utp.edu.my/29672/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description The restoration of mechanical properties is desired for creating the self-healing coatings with no corrosion capabilities. The encapsulation of epoxy resins is limited by various factors in urea and melamine formaldehyde microcapsules. An improved method was developed, where epoxy resin was encapsulated by individual wrapping of poly(melamine-formaldehyde) and poly(urea-formaldehyde) shell around emulsified epoxy droplets via oil-in-water emulsion polymerization method. The synthesized materials were characterized analytically. The curing of the epoxy was achieved by adding the Ni/Co(2-MI)6.2NO3 as a latent hardener and iron acetylacetonate Fe(acac)3 as a latent accelerator. Isothermal and non-isothermal differential scanning calorimetric analysis revealed lower curing temperature (Tonset = 116 °C) and lower activation energies (Ea � 69�75 kJ/mol). The addition of microcapsules and complexes did not adversely alter the flexural strength and flexural modulus of the epoxy coatings. The adhesion strength of neat coating decreased from 6310.8 ± 31 to 4720.9 ± 60 kPa and percent healing increased from 50.83 to 67.45% in the presence of acetylacetonate complex at 10 wt% of microcapsules. © 2021 Elsevier Ltd
format Article
author Ullah, H.
Qureshi, K.S.
Khan, U.
Zaffar, M.
Yang, Y.J.
Rabat, N.E.
Khan, M.I.
Saqib, S.
Mukhtar, A.
Ullah, S.
Mubashir, M.
Bokhari, A.
Chai, W.S.
Chew, K.W.
Show, P.L.
spellingShingle Ullah, H.
Qureshi, K.S.
Khan, U.
Zaffar, M.
Yang, Y.J.
Rabat, N.E.
Khan, M.I.
Saqib, S.
Mukhtar, A.
Ullah, S.
Mubashir, M.
Bokhari, A.
Chai, W.S.
Chew, K.W.
Show, P.L.
Self-healing epoxy coating synthesis by embedment of metal 2-methyl imidazole and acetylacetonate complexes with microcapsules
author_sort Ullah, H.
title Self-healing epoxy coating synthesis by embedment of metal 2-methyl imidazole and acetylacetonate complexes with microcapsules
title_short Self-healing epoxy coating synthesis by embedment of metal 2-methyl imidazole and acetylacetonate complexes with microcapsules
title_full Self-healing epoxy coating synthesis by embedment of metal 2-methyl imidazole and acetylacetonate complexes with microcapsules
title_fullStr Self-healing epoxy coating synthesis by embedment of metal 2-methyl imidazole and acetylacetonate complexes with microcapsules
title_full_unstemmed Self-healing epoxy coating synthesis by embedment of metal 2-methyl imidazole and acetylacetonate complexes with microcapsules
title_sort self-healing epoxy coating synthesis by embedment of metal 2-methyl imidazole and acetylacetonate complexes with microcapsules
publisher Elsevier Ltd
publishDate 2021
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85109661371&doi=10.1016%2fj.chemosphere.2021.131492&partnerID=40&md5=371e0246713ae65f4df7dc30f9b242b3
http://eprints.utp.edu.my/29672/
_version_ 1741197281298743296
score 11.62408

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