The Mechanical Integrity of Self-Healing Coating Embedded with Microencapsulated Vegetable Oil

Abstract:

The challenge of self-healing coating is the mechanical integrity of the coating system embedded with microcapsules. This paper emphasis the mechanical integrity of self-healing coating embedded with microencapsulated vegetable oil (waste sunflower oil). The mechanical integrity of the coating system was determined by the bending and Vickers test. The microencapsulation of waste sunflower oil was successfully produced microcapsules with a mean diameter of 1 μm and a rough shell structure that matchable to embedded in coating matrix. The embedment of microcapsules into the coating matrix has generated self-healing performance with ability to self-heal after 5 days. The mechanical integrity of coating system was increased and demonstrated higher maximum stress (654.25 N/mm2) and higher hardness value (4.40 HV) as compared to the reference sample. It can be concluded that, the microencapsulated waste sunflower oil as an alternative natural vegetable oil to be embedded in the coating system to generate self-healing performance and induce higher mechanical integrity. This finding was able to contribute to the advancement of the future of metal coating industries.

• Periodical: Key Engineering Materials (Volume 908)
• Pages: 612-617
• DOI: https://doi.org/10.4028/p-v7e94l
• Online since: January 2022
• Authors: Zulkhibri Baharom, Zamratul Maisarah Mohd Ismail, Maizlinda Izwana Idris, Hasan Zuhudi Abdullah*
• Keywords: Microencapsulation, Self-Healing Coating, Waste Sunflower Oil

References

[1] K. Thanawala, N. Mutneja, A.S. Khanna, and R.K.S. Raman, Development of self-healing coatings based on linseed oil as autonomous repairing agent for corrosion resistance, Materials (Basel). 7 (2014) 7324–7338.

DOI: 10.3390/ma7117324

[2] M. Samadzadeh, S.H. Boura, M. Peikari, A. Ashrafi, and M. Kasiriha, Progress in organic coatings tung oil: An autonomous repairing agent for self-healing epoxy coatings, Prog. Org. Coatings. 70 (2011) 383–387.

DOI: 10.1016/j.porgcoat.2010.08.017

[3] H. Li, Y. Cui, Z. Li, Y. Zhu, and H. Wang, Fabrication of microcapsules containing dual-functional tung oil and properties suitable for self-healing and self-lubricating coatings, Prog. Org. Coatings. 115 (2018) 164–171.

DOI: 10.1016/j.porgcoat.2017.11.019

[4] T. Szabó, J. Telegdi, and L. Nyikos, Linseed oil filled microcapsules containing drier and corrosion inhibitor-Their effect on self-healing, Prog. Org. Coatings. 84 (2015) 136–142.

DOI: 10.1016/j.porgcoat.2015.02.020

[5] Z. Baharom, N.B. Baba, R. Ramli, M.I. Idris, and H.Z. Abdullah, Microencapsulation of natural self-healing agent as corrosion coating, AIP Conf. Proc., 2068 (2019) 1-5.

DOI: 10.1063/1.5089402

[6] S.N. Khorasani, S. Ataei, and R.E. Neisiany, Microencapsulation of a coconut oil-based alkyd resin into Poly (Melamine – Urea – Formaldehyde) as shell for self-healing purposes, Prog. Org. Coatings. 111 (2017) 99–106.

DOI: 10.1016/j.porgcoat.2017.05.014

[7] N. Shahabudin, R. Yahya, and S.N. Gan, Microcapsules filled with a palm oil-based alkyd as healing agent for epoxy matrix, Polymers (Basel). 8 (2016) 1–16.

DOI: 10.3390/polym8040125

[8] T. Yin, M.Z. Rong, M.Q. Zhang, and G.C. Yang, Self-healing epoxy composites - Preparation and effect of the healant consisting of micro-encapsulated epoxy and latent curing agent. Compos. Sci. Technol. 67 (2017) 201–212.

DOI: 10.1016/j.compscitech.2006.07.028

[9] D.H. Turkenburg, Y. Durant, and H.R. Fischer, Bio-based selfhealing coatings based on thermo-reversible Diels-Alder reaction, Prog. Org. Coatings. 111 (2017) 38–46.

DOI: 10.1016/j.porgcoat.2017.05.006

[10] Z. Cai, Z. Li, Y. Ding, J. Zheng, J. Liu, and Z. Zhou, Preparation and impact resistance performance of bionic sandwich structure inspired from beetle forewing, Compos. Part B. 161 (2019) 490–501.

DOI: 10.1016/j.compositesb.2018.12.139

[11] K. Thanawala, A.S. Khanna, and R.K.S. Raman, Development of self-healing coatings using encapsulated linseed oil and tung oil as healing agents, NACE Int. 7310 (2016) 1–9.

DOI: 10.3390/ma7117324

[12] P.R. Hondred, L. Salat, and M.R. Kessler, Tung oil‐based thermosetting polymers for self‐healing applications, J. Appl. Polym. Sci. 131 (2014) 1–15.

DOI: 10.1002/app.40406

[13] S.M. Mirabedini, I. Dutil, and R.R. Farnood, Preparation and characterization of ethyl cellulose-based core–shell microcapsules containing plant oils. Colloids Surfaces A Physicochem. Eng. Asp., 394 (2012) 74–84.

DOI: 10.1016/j.colsurfa.2011.11.028

[14] D. Abrantes, I.C. Riegel-vidotti, M. Guerreiro, S. Ferreira, C. Eliana, and B. Marino, Smart coating based on double stimuli-responsive microcapsules containing linseed oil and benzotriazole for active corrosion protection, Corros. Sci. 130 (2018) 56–63.

DOI: 10.1016/j.corsci.2017.10.009

[15] N. Shahabudin, R. Yahya, and S.N. Gan, Microencapsulation of a palm oil-based alkyd by amino resins, Macromol. Symp. 354 (2015) 305–313.

DOI: 10.1002/masy.201400085

[16] S. Ataei, S. Nouri, R. Torkaman, and R. Esmaeely, Self-healing performance of an epoxy coating containing microencapsulated alkyd resin based on coconut oil, Prog. Org. Coatings. 120 (2018) 160–166.

DOI: 10.1016/j.porgcoat.2018.03.024

[17] Z. Baharom, M.I. Idris, T.C. Lee, S.A.S.A. Bakar, and H.Z. Abdullah, Characterizations on microencapsulated sunflower oil as self-healing agent using in situ polymerization method, Mater. Sci. Forum. 1010 (2020) 433–438.

DOI: 10.4028/www.scientific.net/msf.1010.433

[18] Z. Baharom, M.I. Idris, T.C. Lee, and H.Z. Abdullah, Effects of surfactant concentration on microencapsulated waste vegetable oil, AIP Conf. Proc. 2068 (2019) 1–5.

DOI: 10.1063/1.5089404

[19] Z. Baharom, M.I. Idris, T.C. Lee, and H Z. Abdullah, Comparative study on microencapsulated of natural and waste sunflower oil as self-healing agent, Mater. Sci. Forum. 1010 (2020) 439–444.

DOI: 10.4028/www.scientific.net/msf.1010.439

[20] F. Safaei, S.N. Khorasani, H. Rahnama, and R.E. Neisiany, Single microcapsules containing epoxy healing agent used for development in the fabrication of cost efficient self-healing epoxy coating, Prog. Org. Coatings. 114 (2018) 40–46.

DOI: 10.1016/j.porgcoat.2017.09.019

[21] M. Behzadnasab, S.M. Mirabedini, M. Esfandeh, and R.R. Farnood, Evaluation of corrosion performance of a self-healing epoxy-based coating containing linseed oil-filled microcapsules via electrochemical impedance spectroscopy, Prog. Org. Coatings. 105 (2017) 212–224.

DOI: 10.1016/j.porgcoat.2017.01.006

[22] J. Lee, M. Zhang, D. Bhattacharyya, and Y. Chao, Micromechanical behavior of self-healing epoxy and hardener-loaded microcapsules by nanoindentation, Mater. Lett. 76 (2012) 62–65.

DOI: 10.1016/j.matlet.2012.02.052