Study on the properties of self-healing epoxy coating based on Pickering emulsion system
DOI:
https://doi.org/10.54097/hset.v62i.10679Keywords:
Microcapsule; self-healing epoxy coating; corrosion resistance; mechanical property.Abstract
In this study, Pickering emulsion template method and interfacial polymerization method are used to prepare microcapsules containing tung oil with Polyvinyl alcohol (PVA) as stabilizer, PUA as wall material and tung oil as core material. Microcapsules are structured and spherical, with uniform size distribution. The prepared microcapsules were dispersed in epoxy resin to form a self-healing epoxy coating. The effect of brine soaking time on the corrosion resistance of the self-healing epoxy coating was studied. EIS results showed that the self-healing epoxy coating with microcapsules had better corrosion resistance than pure epoxy resin. The mechanical properties of the self-healing epoxy coating with microcapsule content were studied by measuring the tensile strength, tensile shear strength and coating hardness. When the microcapsule content was 3%, the tensile strength increased to 84.71 MPa, which was 35.53% higher than that of pure epoxy resin. The hardness of self-healing epoxy coating is 22.46 HV, which is 0.18% lower than that of pure epoxy coating. The experimental results show that a small amount of microcapsules can improve the mechanical properties of the self-healing coating.
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Seongpil A, Lee M W, Yarin A L, et al. A review on corrosion-protective extrinsic self-healing: Comparison of microcapsule-based systems and those based on core-shell vascular networks[J]. Chemical Engineering Journal, 2018, 344:206-220.
Sarah B. U, Ramya R, Jerin K P, et al. Developments in smart anticorrosive coatings with multifunctional characteristics[J]. Progress in Organic Coatings, 2017, 111:294-314.
Sepideh P, Farhad S, Duan J Z, et al. Polymer/Inorganic nanocomposite coatings with superior corrosion protection performance: A review[J]. Journal of Industrial and Engineering Chemistry, 2020, 88:29-57.
Zhang Z H, Yan D H, Liu X C, et al. Jun. Self-healing nanocomposite coatings containing organic-inorganic inhibitors functionalized dendritic silica nanocontainers for synergistic corrosion protection of carbon steel[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2023, 656:130430.
Wang W, Wang H L, Zhao J, et al. Self-healing performance and corrosion resistance of graphene oxide-mesoporous silicon layer-nanosphere structure coating under marine alternating hydrostatic pressure[J]. Chemical Engineering Journal, 2018, 361(C):792-804.
Korde J M, Balasubramanian K. Fundamentals and effects of biomimicking stimuli-responsive polymers for engineering functions[J]. Industrial & Engineering Chemistry Research, 2019, 58(23):9709-9757.
Zhang F, Ju P F, Pan M Q, et al. Self-healing mechanisms in smart protective coatings: A review[J]. Corrosion Science, 2018, 144:74-88.
Poornima V P, Mariam A M. Self-repairing composites for corrosion protection: A review on recent strategies and evaluation methods[J]. Materials, 2019, 12(17):2754.
Katharina U, Andreas K, Wolfgang K, et al. Self-healing of densely crosslinked thermoset polymers-a critical review[J]. Progress in Organic Coatings, 2016, 104:232-249.
Zhang X h, Liu L, Zhang Z Q, et al. Microencapsulation technology and its application[J]. Heilongjiang Medicine, 2014, 27(05):1051-1055. (in Chinese)
Brown E N, Kessler M R, Sottos N R, et al. In situ poly(urea-formaldehyde) microencapsulation of dicyclopentadiene[J]. Journal of Microencapsulation, 2003, 20(6):719-719.
Yuan L, Gu A J, Liang G Z. Preparation and properties of poly(urea–formaldehyde) microcapsules filled with epoxy resins[J]. Materials Chemistry and Physics, 2008, 110(2):417-425.
Blaiszik B J, Caruso M M, Mcllroy D A, et al. Microcapsules filled with reactive solutions for self-healing materials[J]. Polymer, 2009, 50(4):990-997.
Yan X X, Qian X Y, Chang Y J. Preparation and characterization of urea formaldehyde@epoxy resin microcapsule on waterborne wood coatings[J]. Coatings, 2019, 9(8):475-475.
Li K K, Li H Y, Cui Y X, et al. Dual-functional coatings with self-lubricating and self-healing properties by combining poly(urea-formaldehyde)/SiO2 hybrid microcapsules containing linseed oil[J]. Industrial & Engineering Chemistry Research, 2019, 58(48):22032-22039.
Du W, Yu J Y, Gu Y, et al. Preparation and application of microcapsules containing toluene-di-isocyanate for self-healing of concrete[J]. Construction and Building Materials, 2019, 202:762-769.
Sun D W, Chong Y B, Chen K, et al. Chemically and thermally stable isocyanate microcapsules having good self-healing and self-lubricating performances[J]. Chemical Engineering Journal, 2018, 346:289-297.
Yin T, Rong M Z, Zhang M Q, et al. Self-healing epoxy composites-preparation and effect of the healant consisting of microencapsulated epoxy and latent curing agent[J]. Composites Science and Technology, 2006, 67(2):201-212.
Li H, Wang X M. Preparation of microcapsules with IPDI monomer and isocyanate prepolymer as self-healing agent and their application in self-healing materials[J]. Polymer, 2022, 262:125478.
Li J Y, Shi H W, Liu F C, et al. Self-healing epoxy coating based on tung oil-containing microcapsules for corrosion protection[J]. Progress in Organic Coatings, 2021, 156:106236.
Joseph D R, Nancy R S, Scott R W. Effect of microcapsule size on the performance of self-healing polymers[J]. Polymer, 2007, 48(12):3520-3529.
Ding S X, Yan C Y, Min Z R, et al. Self-healing epoxy based on cationic chain polymerization[J]. Polymer, 2009, 50(13):2967-2975.
Balaji K, Prasanna S R V, Binder W H, et al. Catalyst free self-healable vitrimer/graphene oxide nanocomposites[J]. Composites Part B: Engineering, 2020, 184(C):107647.
Samadzadeh M, Boura S H, Peikari M, et al. Tung oil: An autonomous repairing agent for self-healing epoxy coatings[J]. Progress in Organic Coatings, 2010, 70(4):383-387.
Li H Y, Cui Y X, Wang H Y, et al. Preparation and application of polysulfone microcapsules containing tung oil in self-healing and self-lubricating epoxy coating[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2017, 518:181-187.
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