Investigation of the self-healing properties of shape memory polyurethane coatings with the ‘odd random phase multisine’ electrochemical impedance spectroscopy

Jorcin, Jean-Baptiste; Scheltjens, Gill; Ingelgem, Yves Van; Tourwe, Els; Assche, Guy Van; Graeve, Iris De; Mele, Bruno Van; Terryn, Herman; Hubin, Annick

doi:10.1016/j.electacta.2010.01.027

Cited by 66 publications

(28 citation statements)

References 10 publications

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“…8 The engineering applications of the shape memory (SM) effect have recently expanded to the design of self-healing polymeric systems, attracting enormous attention in both scientific and industrial areas of research. 10 Jorcin et al 14 studied the physical selfhealing effect of SM polycaprolactone-based polyurethane thermoplastics as coatings on aluminium substrates. [11][12][13] In general, the shape recovery effect brings the crack surfaces into intimate contact, which allows healing, thus eliminating the need for external intervention to close the crack.…”

Section: Introductionmentioning

confidence: 99%

Healable shape memory (thio)urethane thermosets

et al. 2015

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Urethane-thiourethane networks combining shape memory properties and the ability to self-heal under mild temperature conditions via Diels-Alder (DA) chemistry were developed. As a result of the shape recovery effect, no external force was needed to bring the fracture surfaces into intimate contact during the healing process. Four network architectures with DA net-points were evaluated. Two systems were composed of either bismaleimidic or bisfuranic semi-crystallized polycaprolactone chains acting as shape memory switching segments (T trans = T m ), whereas the other two networks consisted of bis-/trismaleimidic and trisfuranic monomers and displayed glass transitions for initiating shape recovery behaviour (T trans = T g ). The formation of the DA cross-links, the DA reversibility and shape memory assisted scratch healing of the materials were studied by FTIR and 1 H-NMR spectrometry, differential scanning calorimetry, optical microscopy and tensile measurements. The results indicated that the healing efficiency of scratches depends strongly on the shape recovery ability, without which crack closure and thus the healing reaction could not occur. Two materials were found to feature good shape memory properties as well as efficient scratch-healing capacities, showing mechanical recoveries of 70-80% and the almost complete disappearance of scratches after healing at a mild temperature of 60°C for 1-3 days. These materials could find applications in diverse fields such as self-healing coatings.Scheme 1 Chemical structures of the (thio)urethane multi-maleimide and multi-furan monomers and schematic depiction of the SM networks reversibly cross-linked by the DA reaction. Polymer Chemistry PaperThis journal is

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Section: Introductionmentioning

confidence: 99%

Healable shape memory (thio)urethane thermosets

et al. 2015

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“…PUR segments are meanwhile responsible for maintaining mechanical properties 18 . Further research focused on investigation of the self-healing properties showed that SMPUR with 12% of hard domains has the ability to self-repair 19 .…”

Section: Reversible Polymersmentioning

confidence: 99%

Polyurethanes as self-healing materials

Szmechtyk¹,

Sienkiewicz²,

Woźniak³

et al. 2015

10.5267/j.ccl

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“…The use of shape memory polymers (SMPs) provides another promising solution by which coating's bulk integrity and surface morphology can be restored from temporary deformation in response to environmental stimuli such as heat or light [25][26] . For example, self-healing coatings based on poly(ε-caprolactone) (PCL)-containing polyurethanes (PU) SMPs were reported in several previous works [27][28][29] . By triggering the shape memory effect above the melting temperature of PCL, coating damages were physically closed, leading to the recovery of the corrosion protection of the aluminum or aluminum alloy substrates.…”

Section: Introductionmentioning

confidence: 99%

Dual-action smart coatings with a self-healing superhydrophobic surface and anti-corrosion properties

et al. 2017

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Important noteTo cite this publication, please use the final published version (if applicable). Please check the document version above. CopyrightOther than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons. Takedown policyPlease contact us and provide details if you believe this document breaches copyrights. We will remove access to the work immediately and investigate your claim. AbstractThis work introduces a new self-healing superhydrophobic coating based on dual actions by the corrosion inhibitor benzotriazole (BTA) and an epoxy-based shape memory polymer (SMP). Damage to the surface morphology (e.g., crushed areas and scratches) and the corresponding superhydrophobicity is shown to be rapidly healed through a simple heat treatment at 60 °C for 20 min. Electrochemical impedance spectroscopy (EIS) and scanning electrochemical microscopy (SECM) were used to study the anti-corrosion performance of the scratched and the healed superhydrophobic coatings immersed in a 3.5 wt% NaCl solution. The results revealed that the anti-corrosion performance of the scratched coatings was improved upon the incorporation of BTA. After the heat treatment, the scratched superhydrophobic coatings exhibited excellent recovery of the anti-corrosion performance, which is attributed to the closure of the scratch by the shape memory effect and to the improved inhibition efficiency of BTA. Furthermore, we found that the pre-existing corrosion product inside the coating scratch could hinder the scratch closure by the shape memory effect and reduce the coating adhesion in the scratched region. However, the addition of BTA effectively suppressed the formation of corrosion product and enhanced the self-healing and adhesion performance under this condition. Importantly, we also demonstrated that the coating can be autonomously healed within 1 h in an outdoor environment using sunlight as the heat source.

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Investigation of the self-healing properties of shape memory polyurethane coatings with the ‘odd random phase multisine’ electrochemical impedance spectroscopy

Cited by 66 publications

References 10 publications

Healable shape memory (thio)urethane thermosets

Healable shape memory (thio)urethane thermosets

Polyurethanes as self-healing materials

Dual-action smart coatings with a self-healing superhydrophobic surface and anti-corrosion properties

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