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Synthesis of Cloisite 30B-acrylamide/acrylic acid nanogel composite for self-healing purposes
Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran.
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2021 (English)In: Applied Clay Science, ISSN 0169-1317, E-ISSN 1872-9053, Vol. 210, article id 106174Article in journal (Refereed) Published
Abstract [en]

In the present study, Cloisite 30B nanoclay was modified to prepare a nanogel composite based on acrylic acid (AA) and acrylamide (AAm) through in-situ copolymerization. The prepared nanogel composites were cross-linked and subsequently embedded within a commercial epoxy resin to develop a self-healing epoxy-based coating. The nanogel composites were assessed using Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), and field emission scanning electron microscopy (FE-SEM). FTIR results confirmed a successful nanogel composite synthesis while the XRD results revealed the increase of the interlayer space of modified nanoclay leading to better dispersion in nanogel, which was also corroborated by TEM. The swelling ratio of the nanogel composite was evaluated to investigate the effect of the crosslinking agent on the swelling of the nanogel. The composite incorporation influence on the properties of the epoxy-based coatings was studied through the pull-off adhesion and elongation at break assessments. The results revealed the nanogel composite embedment within the epoxy coatings slightly decreased the mechanical properties. The self-healing performance of the nanogel incorporated epoxy-based coating was evaluated by electrochemical tests. The obtained results confirmed that the epoxy coating containing 0.5 wt% of nanogel composite provided the highest corrosion resistance after damages with the self-healing efficiency of 99.88%.

Place, publisher, year, edition, pages
Elsevier, 2021. Vol. 210, article id 106174
Keywords [en]
Self-healing, Surface modification, Nanogel composite, Montmorillonite Cloisite 30B
National Category
Composite Science and Engineering
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-84951DOI: 10.1016/j.clay.2021.106174ISI: 000672810600004Scopus ID: 2-s2.0-85107157808OAI: oai:DiVA.org:ltu-84951DiVA, id: diva2:1561260
Note

Validerad;2021;Nivå 2;2021-06-07 (johcin)

Available from: 2021-06-07 Created: 2021-06-07 Last updated: 2023-09-05Bibliographically approved

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Das, OisikNeisiany, Rasoul Esmaeely

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