Synthesis of UV-Responsive Dual-Functional Microspheres for Highly Efficient Self-Healing Coatings

Zhu, Yuye; Chen, Min; Wu, Limin

doi:10.1016/j.cej.2021.130034

Cited by 32 publications

(16 citation statements)

References 46 publications

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“…To fulfil multi-functions, either multilayer-microcapsules [ 19 ] or dual functional microcapsules [ 20 ] were prepared. Healing agent linseed oil and corrosion inhibitor benzotriazole (BTA) were stored separately in multi-layer microcapsules through in situ polymerization and layer-by-layer assembly [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Dual Functional Graphene Oxide Microcapsules Carrying Corrosion Inhibitor and Encapsulating Self-Healing Agent

Tao

Cui

et al. 2022

Polymers

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Dual functional graphene oxide (GO) microcapsules were fabricated through self-assembly in Pickering emulsions, carrying corrosion inhibitor benzotriazole (BTA) on the microcapsule shells and encapsulating a self-healing agent epoxy monomer. The formation of the GO microcapsules was assisted by the interaction between BTA and GO, which provided robust encapsulation for the epoxy monomer. The loading capacity of BTA and epoxy monomer reached 90.5%. The addition of the GO microcapsules simultaneously promoted the corrosion protection and self-healing properties of the waterborne epoxy composite coatings. The healing efficiency of the composite coatings reached over 99.7% when the content of the microcapsules was 10 wt%. Meanwhile, the corrosion current density of the intact coatings was decreased for around 50 times.

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Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Dual Functional Graphene Oxide Microcapsules Carrying Corrosion Inhibitor and Encapsulating Self-Healing Agent

Tao

Cui

et al. 2022

Polymers

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“…[3,32] In addition, researchers have paid more attention to photoresponsive healing agent containers. [33] For instance, Zhu et al [34] prepared a photoresponsive self-healing microcapsule with coumarin as a healing agent and cross-linking agent for the shell. Under UV irradiation, the repair agent was released, and cracks were repaired due to the breakage of the cross-linked network of coumarin.…”

Section: Introductionmentioning

confidence: 99%

Photoresponsive Self‐Healing Epoxy Composites with Azobenzene Grafted Mesoporous Silica for Controlled Release and Visualization

Zhou

Chen

et al. 2022

Macro Materials & Eng

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The substantial progress made in extrinsic self‐healing has been limited to microcapsules containing heat‐active polymerizable monomers. Fabrication of self‐healing microvascular and nanoparticle systems that are responsive to light is, therefore, an important task. In this study, using azobenzene‐grafted mesoporous SBA‐15 (Azo‐SBA) as the functional nanocontainer to adsorb a photoactive repair agent (glycidyl methacrylate, GMA)(GMA@Azo‐SBA), a facile yet feasible strategy is demonstrated to prepare photoresponsive self‐healing epoxy composites. The resulting composite integrates the controllable fixation and release of the repair agent driven by the isomerization of azobenzene and photo‐induced self‐healing properties under UV irradiation. The hydrogenated epoxy resin composite, incorporated with isophorone diamine (IPDA) as the curing agent and 2 wt.% GMA@Azo‐SBA and 4 wt.% photoinitiator, exhibits desirable self‐healing properties; the microcracks of the composite can be completely repaired after self‐healing for 15 min. In addition, the pyrene‐modified GMA monomer with fluorescence characteristics as a fluorescent probe is further employed to successfully visualize the fixation and release process of the repair agent under UV irradiation.

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“…It is suitable to be used as the capsule core of microcapsules, which can effectively heal the generation of microcracks and achieve the role of being self repairing. Zhu et al [17] reported a UV responsive, bifunctional microsphere system for repairing coating cracks for efficient self-healing coatings. Therefore, the self repair of a water-based coating on a wood surface can further protect the wood substrate.…”

Section: Introductionmentioning

confidence: 99%

Effects of Thermochromic Fluorane Microcapsules and Self-Repairing Waterborne Acrylic Microcapsules on the Properties of Water-Based Coatings on Basswood Surface

2022

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The effect of the addition of fluorane microcapsules and urea formaldehyde resin (UF) waterborne acrylic resin microcapsules on the comprehensive properties of the water film on the surface of basswood was studied. Three-factor and two-level orthogonal experiments were carried out with “fluorane microcapsule content”, “aqueous acrylic resin microcapsule content” and the “fluorane microcapsule addition method” to prepare a self-repairing thermochromic coating. The optical, mechanical, microstructure and self-repairing properties of the film were optimized by independent experiments on the maximum influence factors of the fluorane microcapsule content. It was concluded that the topcoat with 15% fluorane microcapsules and primer added with 15% water acrylic resin microcapsules had better comprehensive properties. The temperature range was 30–32 °C, the color difference at 32 °C was 72.6 ± 2.0, the 60° gloss was 3.3%, the adhesion was 0 grade, the hardness was 4 H, the impact resistance was 15.0 ± 0.8 kg∙cm, the elongation at break was 17.2% and the gap width was reduced by 3.5 ± 0.1 μm after the film was repaired. The repair rate reached 62.5%. By using microcapsule embedding technology, the repair agent and discoloration agent are embedded in the matrix. The waterborne acrylic resin microcapsules can effectively inhibit crack formation in the coating, and the fluorane microcapsules can achieve the thermochromic property of the coating. This study provides a new research idea for the self-repairing thermochromic dual function of a water-based coating.

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Synthesis of UV-Responsive Dual-Functional Microspheres for Highly Efficient Self-Healing Coatings

Cited by 32 publications

References 46 publications

Facile Fabrication of Dual Functional Graphene Oxide Microcapsules Carrying Corrosion Inhibitor and Encapsulating Self-Healing Agent

Facile Fabrication of Dual Functional Graphene Oxide Microcapsules Carrying Corrosion Inhibitor and Encapsulating Self-Healing Agent

Photoresponsive Self‐Healing Epoxy Composites with Azobenzene Grafted Mesoporous Silica for Controlled Release and Visualization

Effects of Thermochromic Fluorane Microcapsules and Self-Repairing Waterborne Acrylic Microcapsules on the Properties of Water-Based Coatings on Basswood Surface

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