Tung oil: An autonomous repairing agent for self-healing epoxy coatings

Samadzadeh, Mahdi; Boura, Saeed Hatami; Peikari, M.; Ashrafi, Ali; Kasiriha, Mahmood

doi:10.1016/j.porgcoat.2010.08.017

Cited by 226 publications

(91 citation statements)

References 7 publications

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“…Stankiewicz et al [51] reviewed different type of self-healing coating for anti-corrosion applications. Drying oil encapsulated capsules such linseed oil encapsulated phenol-formaldehyde (PF) microcapsules [52] and tung oil encapsulated PUF microcapsules [53] were used to make self-healing epoxy coatings. Drying oils are chemically unsaturated glycerides of long chain fatty acids.…”

Section: Polymer Capsules In Epoxy Coatingsmentioning

confidence: 99%

‘Containers’ for self-healing epoxy composites and coating: Trends and advances

Vijayan¹,

Al-Maadeed²

2016

Express Polym. Lett.

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Abstract.The introduction of self-healing functionality into epoxy matrix is an important and challenging topic. Various micro/nano containers loaded self-healing agents are developed and incorporated into epoxy matrix to impart self-healing ability. The current report reviews the major findings in the area of self-healing epoxy composites and coatings with special emphasis on these containers. The preparation and use of polymer micro/nano capsules, polymer fibers, hollow glass fibers/bubbles, inorganic nanotubes, inorganic meso-and nano-porous materials, carbon nanotubes etc. as self-healing containers are outlined. The nature of the container and its response to the external stimulations greatly influence the self-healing performance. The self-healing mechanism associated with each type of container and the role of container parameters on self-healing performance of self-healing epoxy systems are reviewed. Comparison of the efficiency offered by different types of containers is introduced. Finally, the selection of containers to develop cost effective and green self-healing systems are mentioned.

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Section: Polymer Capsules In Epoxy Coatingsmentioning

confidence: 99%

‘Containers’ for self-healing epoxy composites and coating: Trends and advances

Vijayan¹,

Al-Maadeed²

2016

Express Polym. Lett.

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“…The most common core substances for self-healing systems are dicyclopentadiene and Grubbs catalysts (White et al, 2001), epoxy resins (Zhao et al, 2012;Liu et al, 2012), diglycidyl ether bisphenol-A based epoxy resins with an imidazole hardener (Rong et al, 2007), mercaptan compounds and cationic initiators BF 3 .OEt 2 , vinyl functionalized poly(dimethylsiloxane) resins and platinum catalysts (Keller et al, 2007), styrene (Wang et al, 2008, Wang et al, 2009, polythiol epoxy hardeners , reactive amines (McIlroy et al, 2010), diisocyanate resins , methyl(methacrylate) . ils draying on air can be used in coatings contacted with air: linseed oil (Selvakumar et al, 2012, Szabó et al, 2011, Boura et al, 2012, Nesterova et al, 2012), tung oil ( Samadzadeh et al, 2011), water-reactive silyl ester (García et al, 2011). Shell materials are polyurethane, amino or phenolic resins, and silica.…”

Section: Core-shell Structuresmentioning

confidence: 99%

The use of nano-/microlayers, self-healing and slow-release coatings to prevent corrosion and biofouling

Telegdi

Szabó

Románszki

et al. 2014

Handbook of Smart Coatings for Materials Protection

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The mitigation of corrosion and biofouling is a challenge. Through application of chemicals and special techniques can slow these undesired processes, an effective resolution requires a multidisciplinary approach involving scientists, engineers, and metallurgists. In order to understand the importance of the use of nano-and microlayers as well as selfhealing coatings, the basic concepts of corrosion, corrosion mechanisms, corrosion inhibition and the microbiologically influenced corrosion will be summarised. The preparation, characterization and application of Langmuir-Blodgett and self assembled nanolayers in corrosive and microbial environment will be discussed. Preparation and characterization of microcapsules/ microspheres and their application in coatings will be demonstrated by a number of examples.Keywords: nano-and microcoating, self-healing, slow-release, anticorrosion, antifouling IntroductionCorrosion is a well-known problem all over the world. It consumes a significant part of the gross national product (GDP) of developed and developing countries. A number of authors have provided comprehensive introductions to corrosion mainly in aqueous and wet environments (Jones, 1991;Kaesche, 2003; McCafferety, 2010). Corrosion is the destructive result of the chemical/electrochemical reactions between metals and the environment. Corrosive reactions involve water in either liquid or condensed phases. Most corrosion reactions are electrochemical processes. These involve electron or charge transfer in aqueous solution which leads to metal dissolution (anodic reaction). Depending on the pH of the solution, either hydrogen or hydroxonium ions evolve, resulting in oxides, oxyhydroxides, hydroxides and salts formed on the metal surface (cathodic reaction). The electrochemical potential or electron activity affects the rate of corrosion reaction. To understand corrosion it is necessary to discuss briefly the types of corrosion and the reactions involved.Corrosion occurs in various forms.-Uniform corrosion: The metal surface must be compositionally uniform; the aggressive environment has the same access to all parts of the metal. This type of

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“…Como dito anteriormente, dentro da composição básica do revestimento temos os aditivos, alguns são aditivos de reologia, de cinética, de processo e de preservação (Fazenda, 1993 Nesterova et al, 2011;Samadzadeh et al, 2011) foram realizados e encontrou-se que a escala de tamanho das cápsulas é de aproximadamente 100 micras, mas há interesse em algumas aplicações, em reduzir esse tamanho a escalas nanométricas. Estudos mostram que é possível variar o tamanho das cápsulas usando diferentes velocidades de agitação na etapa de formação da emulsão.…”

Section: Pré-tratamentosunclassified

“…Em um estudo prévio já tinham demonstrado que efetivamente melhorava a proteção do aço carbono, mas o seguinte passo foi descobrir se diante de um defeito executado qual seria o comportamento deste revestimento, e encontraram que quando o processo de corrosão começa na área do defeito, o pH geralmente diminui o que incita a atuação da argila a liberar a substância (inibidor) sendo este chamado pelos autores, um comportamento de autorreparação. Samadzadeh, et al (2011) e Dhirendra et al (2008 também na busca de proteger os substratos utilizaram outro mecanismo para a autorreparação do filme que revestia o metal (aço carbono e latão) em estudo. Aditivando uma resina epóxi com cápsulas contendo óleos secantes (óleo de tung -árvore chinesa-e óleo de linhaça, respectivamente), posteriormente aplicando-se a resina sobre os substratos e após a cura, um defeito foi executado para que as microcápsulas quebrassem e liberassem o óleo formador de película autorreparadora.…”

Section: Mecanismos De Autorreparaçãounclassified

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Estudo do efeito de autorreparação nos revestimentos aditivados com microcápsulas contendo óleo de linhaça.

Restrepo¹

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Tung oil: An autonomous repairing agent for self-healing epoxy coatings

Cited by 226 publications

References 7 publications

‘Containers’ for self-healing epoxy composites and coating: Trends and advances

‘Containers’ for self-healing epoxy composites and coating: Trends and advances

The use of nano-/microlayers, self-healing and slow-release coatings to prevent corrosion and biofouling

Estudo do efeito de autorreparação nos revestimentos aditivados com microcápsulas contendo óleo de linhaça.

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