The influence of the healing agent characteristics on the healing performance of epoxy coatings: Assessment of the repair process by EIS technique
The effects of the healing agents' molecular characteristics were studied on the self-healing performance of the epoxy coatings via corrosion evaluation techniques. Methylene diphenyl diisocyanate (kept constant) and different polyetheramine healing agents were encapsulated separately in poly(s...
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| Veröffentlicht in: | Progress in organic coatings 2021-10, Vol.159, p.106431, Article 106431 |
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| creator | Koochaki, Mohammad Sadegh Neisiany, Rasoul Esmaeely Khorasani, Saied Nouri Ashrafi, Ali Trasatti, Stefano P. Magni, Mirko |
| description | The effects of the healing agents' molecular characteristics were studied on the self-healing performance of the epoxy coatings via corrosion evaluation techniques. Methylene diphenyl diisocyanate (kept constant) and different polyetheramine healing agents were encapsulated separately in poly(styrene-co-acrylonitrile) through the electrospray method and added to the epoxy matrix to prepare a polyurea-based dual capsule extrinsic healing system. Commercial grades of polyetheramine, Jeffamine D230, Jeffamine D400, and Jeffamine T403, were used to study the effects of molecular weight and functionality. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images revealed the formation of spherical shape with multicore morphology for the prepared polyetheramine containing microcapsules (MCs). Successful encapsulation was evaluated by Fourier transform infrared spectroscopy (FTIR), while the encapsulation yield was measured by thermogravimetric analysis (TGA). Electrochemical Impedance Spectroscopy (EIS) was employed to monitor the corrosion behaviour of a series of coated carbon steel samples through the evolution of the impedance spectra, and the numerical values of the related electrical equivalent circuit components (e.g., corrosion resistance), of the scratched coatings at different exposure times in a near-neutral 3.5 wt% NaCl solution. The results revealed the adverse effect on the corrosion protection ability by increasing the healing agent's molecular weight, while an increase of its functionality improved the final healing efficiency of the coating. According to the EIS results, the maximum healing efficiency was determined to be 85%, 72%, and 90% for Jeffamine D230, Jeffamine D400, and Jeffamine T403, respectively.
[Display omitted]
•A polyurea-based dual capsule system was employed to develop a highly responsive self-healing coating.•The influence of the healing agent characteristics on the healing performance was investigated.•EIS technique was utilized for the evaluation of self-healing performance.•The healing agent characteristics significantly control the healing rate and barrier feature of the healed layer. |
| doi_str_mv | 10.1016/j.porgcoat.2021.106431 |
| format | Article |
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[Display omitted]
•A polyurea-based dual capsule system was employed to develop a highly responsive self-healing coating.•The influence of the healing agent characteristics on the healing performance was investigated.•EIS technique was utilized for the evaluation of self-healing performance.•The healing agent characteristics significantly control the healing rate and barrier feature of the healed layer.</description><identifier>ISSN: 0300-9440</identifier><identifier>EISSN: 1873-331X</identifier><identifier>DOI: 10.1016/j.porgcoat.2021.106431</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Amines ; Carbon steels ; Corrosion ; Corrosion effects ; Corrosion prevention ; Corrosion resistance ; Diisocyanates ; Electrochemical impedance spectroscopy ; Electron microscopy ; Encapsulation ; Epoxy coatings ; Equivalent circuits ; Fourier transforms ; Image transmission ; Infrared analysis ; Infrared spectroscopy ; Microencapsulation ; Microscopy ; Molecular weight ; Morphology ; Polyetheramine functionality ; Polyethers ; Polystyrene resins ; Polyurea ; Protective coatings ; Scratch resistance ; Self-healing coatings ; Spectrum analysis ; Thermogravimetric analysis</subject><ispartof>Progress in organic coatings, 2021-10, Vol.159, p.106431, Article 106431</ispartof><rights>2021 Elsevier B.V.</rights><rights>Copyright Elsevier BV Oct 2021</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c388t-12b93a4da652ddb0ff4445b1860da0e913687bd04e98f4875fc24f24dbfb45033</citedby><cites>FETCH-LOGICAL-c388t-12b93a4da652ddb0ff4445b1860da0e913687bd04e98f4875fc24f24dbfb45033</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.porgcoat.2021.106431$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3548,27923,27924,45994</link.rule.ids></links><search><creatorcontrib>Koochaki, Mohammad Sadegh</creatorcontrib><creatorcontrib>Neisiany, Rasoul Esmaeely</creatorcontrib><creatorcontrib>Khorasani, Saied Nouri</creatorcontrib><creatorcontrib>Ashrafi, Ali</creatorcontrib><creatorcontrib>Trasatti, Stefano P.</creatorcontrib><creatorcontrib>Magni, Mirko</creatorcontrib><title>The influence of the healing agent characteristics on the healing performance of epoxy coatings: Assessment of the repair process by EIS technique</title><title>Progress in organic coatings</title><description>The effects of the healing agents' molecular characteristics were studied on the self-healing performance of the epoxy coatings via corrosion evaluation techniques. Methylene diphenyl diisocyanate (kept constant) and different polyetheramine healing agents were encapsulated separately in poly(styrene-co-acrylonitrile) through the electrospray method and added to the epoxy matrix to prepare a polyurea-based dual capsule extrinsic healing system. Commercial grades of polyetheramine, Jeffamine D230, Jeffamine D400, and Jeffamine T403, were used to study the effects of molecular weight and functionality. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images revealed the formation of spherical shape with multicore morphology for the prepared polyetheramine containing microcapsules (MCs). Successful encapsulation was evaluated by Fourier transform infrared spectroscopy (FTIR), while the encapsulation yield was measured by thermogravimetric analysis (TGA). Electrochemical Impedance Spectroscopy (EIS) was employed to monitor the corrosion behaviour of a series of coated carbon steel samples through the evolution of the impedance spectra, and the numerical values of the related electrical equivalent circuit components (e.g., corrosion resistance), of the scratched coatings at different exposure times in a near-neutral 3.5 wt% NaCl solution. The results revealed the adverse effect on the corrosion protection ability by increasing the healing agent's molecular weight, while an increase of its functionality improved the final healing efficiency of the coating. According to the EIS results, the maximum healing efficiency was determined to be 85%, 72%, and 90% for Jeffamine D230, Jeffamine D400, and Jeffamine T403, respectively.
[Display omitted]
•A polyurea-based dual capsule system was employed to develop a highly responsive self-healing coating.•The influence of the healing agent characteristics on the healing performance was investigated.•EIS technique was utilized for the evaluation of self-healing performance.•The healing agent characteristics significantly control the healing rate and barrier feature of the healed layer.</description><subject>Amines</subject><subject>Carbon steels</subject><subject>Corrosion</subject><subject>Corrosion effects</subject><subject>Corrosion prevention</subject><subject>Corrosion resistance</subject><subject>Diisocyanates</subject><subject>Electrochemical impedance spectroscopy</subject><subject>Electron microscopy</subject><subject>Encapsulation</subject><subject>Epoxy coatings</subject><subject>Equivalent circuits</subject><subject>Fourier transforms</subject><subject>Image transmission</subject><subject>Infrared analysis</subject><subject>Infrared spectroscopy</subject><subject>Microencapsulation</subject><subject>Microscopy</subject><subject>Molecular weight</subject><subject>Morphology</subject><subject>Polyetheramine functionality</subject><subject>Polyethers</subject><subject>Polystyrene resins</subject><subject>Polyurea</subject><subject>Protective coatings</subject><subject>Scratch resistance</subject><subject>Self-healing coatings</subject><subject>Spectrum analysis</subject><subject>Thermogravimetric analysis</subject><issn>0300-9440</issn><issn>1873-331X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNqFkMFKAzEQhoMoWKuvIAHPW5NNNt31ZClVC4IHK3gL2eykTWk3a5KKfQ2f2CytB0-eBmb-_5-ZD6FrSkaUUHG7HnXOL7VTcZSTnKam4IyeoAEtxyxjjL6fogFhhGQV5-QcXYSwJoQIxqoB-l6sANvWbHbQasDO4JgaK1Ab2y6xWkIbsV4pr3QEb0O0OmDX_hF14I3zW3X0Q-e-9rg_Jw3DHZ6EACFs-6BjuodOWY8773Sa4HqPZ_NXHEGvWvuxg0t0ZtQmwNWxDtHbw2wxfcqeXx7n08lzpllZxozmdcUUb5Qo8qapiTGc86KmpSCNIlBRJspx3RAOVWl4OS6MzrnJeVObmheEsSG6OeSmQ9LaEOXa7XybVsq8qJgQXFRlUomDSnsXggcjO2-3yu8lJbLnL9fyl7_s-csD_2S8Pxgh_fBpwcugbQ-5sR50lI2z_0X8AMWJlHc</recordid><startdate>202110</startdate><enddate>202110</enddate><creator>Koochaki, Mohammad Sadegh</creator><creator>Neisiany, Rasoul Esmaeely</creator><creator>Khorasani, Saied Nouri</creator><creator>Ashrafi, Ali</creator><creator>Trasatti, Stefano P.</creator><creator>Magni, Mirko</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>202110</creationdate><title>The influence of the healing agent characteristics on the healing performance of epoxy coatings: Assessment of the repair process by EIS technique</title><author>Koochaki, Mohammad Sadegh ; Neisiany, Rasoul Esmaeely ; Khorasani, Saied Nouri ; Ashrafi, Ali ; Trasatti, Stefano P. ; Magni, Mirko</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c388t-12b93a4da652ddb0ff4445b1860da0e913687bd04e98f4875fc24f24dbfb45033</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Amines</topic><topic>Carbon steels</topic><topic>Corrosion</topic><topic>Corrosion effects</topic><topic>Corrosion prevention</topic><topic>Corrosion resistance</topic><topic>Diisocyanates</topic><topic>Electrochemical impedance spectroscopy</topic><topic>Electron microscopy</topic><topic>Encapsulation</topic><topic>Epoxy coatings</topic><topic>Equivalent circuits</topic><topic>Fourier transforms</topic><topic>Image transmission</topic><topic>Infrared analysis</topic><topic>Infrared spectroscopy</topic><topic>Microencapsulation</topic><topic>Microscopy</topic><topic>Molecular weight</topic><topic>Morphology</topic><topic>Polyetheramine functionality</topic><topic>Polyethers</topic><topic>Polystyrene resins</topic><topic>Polyurea</topic><topic>Protective coatings</topic><topic>Scratch resistance</topic><topic>Self-healing coatings</topic><topic>Spectrum analysis</topic><topic>Thermogravimetric analysis</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Koochaki, Mohammad Sadegh</creatorcontrib><creatorcontrib>Neisiany, Rasoul Esmaeely</creatorcontrib><creatorcontrib>Khorasani, Saied Nouri</creatorcontrib><creatorcontrib>Ashrafi, Ali</creatorcontrib><creatorcontrib>Trasatti, Stefano P.</creatorcontrib><creatorcontrib>Magni, Mirko</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Progress in organic coatings</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Koochaki, Mohammad Sadegh</au><au>Neisiany, Rasoul Esmaeely</au><au>Khorasani, Saied Nouri</au><au>Ashrafi, Ali</au><au>Trasatti, Stefano P.</au><au>Magni, Mirko</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The influence of the healing agent characteristics on the healing performance of epoxy coatings: Assessment of the repair process by EIS technique</atitle><jtitle>Progress in organic coatings</jtitle><date>2021-10</date><risdate>2021</risdate><volume>159</volume><spage>106431</spage><pages>106431-</pages><artnum>106431</artnum><issn>0300-9440</issn><eissn>1873-331X</eissn><abstract>The effects of the healing agents' molecular characteristics were studied on the self-healing performance of the epoxy coatings via corrosion evaluation techniques. Methylene diphenyl diisocyanate (kept constant) and different polyetheramine healing agents were encapsulated separately in poly(styrene-co-acrylonitrile) through the electrospray method and added to the epoxy matrix to prepare a polyurea-based dual capsule extrinsic healing system. Commercial grades of polyetheramine, Jeffamine D230, Jeffamine D400, and Jeffamine T403, were used to study the effects of molecular weight and functionality. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images revealed the formation of spherical shape with multicore morphology for the prepared polyetheramine containing microcapsules (MCs). Successful encapsulation was evaluated by Fourier transform infrared spectroscopy (FTIR), while the encapsulation yield was measured by thermogravimetric analysis (TGA). Electrochemical Impedance Spectroscopy (EIS) was employed to monitor the corrosion behaviour of a series of coated carbon steel samples through the evolution of the impedance spectra, and the numerical values of the related electrical equivalent circuit components (e.g., corrosion resistance), of the scratched coatings at different exposure times in a near-neutral 3.5 wt% NaCl solution. The results revealed the adverse effect on the corrosion protection ability by increasing the healing agent's molecular weight, while an increase of its functionality improved the final healing efficiency of the coating. According to the EIS results, the maximum healing efficiency was determined to be 85%, 72%, and 90% for Jeffamine D230, Jeffamine D400, and Jeffamine T403, respectively.
[Display omitted]
•A polyurea-based dual capsule system was employed to develop a highly responsive self-healing coating.•The influence of the healing agent characteristics on the healing performance was investigated.•EIS technique was utilized for the evaluation of self-healing performance.•The healing agent characteristics significantly control the healing rate and barrier feature of the healed layer.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.porgcoat.2021.106431</doi><oa>free_for_read</oa></addata></record> |
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| ispartof | Progress in organic coatings, 2021-10, Vol.159, p.106431, Article 106431 |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Amines Carbon steels Corrosion Corrosion effects Corrosion prevention Corrosion resistance Diisocyanates Electrochemical impedance spectroscopy Electron microscopy Encapsulation Epoxy coatings Equivalent circuits Fourier transforms Image transmission Infrared analysis Infrared spectroscopy Microencapsulation Microscopy Molecular weight Morphology Polyetheramine functionality Polyethers Polystyrene resins Polyurea Protective coatings Scratch resistance Self-healing coatings Spectrum analysis Thermogravimetric analysis |
| title | The influence of the healing agent characteristics on the healing performance of epoxy coatings: Assessment of the repair process by EIS technique |
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