High-efficiency self-repairing anticorrosion coatings with controlled assembly microcapsules

Kong, Fanhou; Xu, W. C.; Zhang, Xuelong; Wang, Xin; Wu, Jinglong

doi:10.1007/s10853-018-2596-6

Cited by 16 publications

(4 citation statements)

References 32 publications

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“…Methods. Preparation of urea formaldehyde-coated epoxy resin microcapsules was composed of three processes [8]: preparation of the urea formaldehyde prepolymer (the wall material), preparation of the epoxy resin emulsion (the core material), and microencapsulation [9].…”

Section: 2mentioning

confidence: 99%

Preparation and Self-Repairing Properties of Urea Formaldehyde-Coated Epoxy Resin Microcapsules

Yan

Chang

Qian

2019

International Journal of Polymer Science

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Urea formaldehyde resin-coated epoxy resin microcapsules were prepared by two-step in situ polymerization. The effects of five factors on the yield, coverage rate, repair rate, and morphology of the microcapsules were investigated by five factors and four levels of orthogonal test. These five factors were the mass ratio of the core to the wall material (Wcore:Wwall), the mass ratio of the emulsifier to the core material (Wemulsifier:Wcore), stirring rate, deposition time, and mass ratio of the emulsifier solution to the core material (Wemulsifier solution:Wcore). The ideal technological level of microcapsule synthesis was determined. According to the results of the range and variance of yield, coverage rate, and repair rate, the comprehensive properties of microcapsules became ideal. At this time, the Wcore:Wwall was 0.8 : 1, Wemulsifier:Wcore was 1 : 100, stirring rate was 600 r/min, deposition time was 32 h, and Wemulsifier solution:Wcore was 8 : 1. When the concentration of microcapsules in the epoxy resin was 10.0%, the self-repair rate was the best and the repair rate was 114.77%. This study is expected to provide a reference value for the preparation of a microcapsule self-healing technology and lay a foundation for the subsequent development of self-healing materials.

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Section: 2mentioning

confidence: 99%

Preparation and Self-Repairing Properties of Urea Formaldehyde-Coated Epoxy Resin Microcapsules

Yan

Chang

Qian

2019

International Journal of Polymer Science

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“…Therefore, self‐healing materials have a wide range of promising applications in aerospace, coatings, medicine, electronic skin, and high elastomers 3 . In order to confer excellent repair ability to materials, various approaches have been explored, including the use of microcapsule repair agents, 4 dense hydrogen bonds, 5,6 reversible covalent bonds, 7 and coordination bonds 1 . When molecular chain breaks occur under external forces, these covalent or non‐covalent bonds are dynamically reorganized at the break surface or the broken molecular chains are reattached covalently or non‐covalently by releasing the repair agents using microcapsules 2,8 .…”

Section: Introductionmentioning

confidence: 99%

High‐efficiency self‐repairing polyurethane based on synergy of disulfide bonds and graded hydrogen bonds

Song,

et al. 2023

J of Applied Polymer Sci

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Designing an elastomer that possesses both mechanical strength and self‐healing properties is a challenging. In this study, a polyurethane elastomer (PUSTP) was successfully synthesized, featuring disulfide bonds along the main chain and graded intermolecular hydrogen bonds. The results demonstrated that the mechanical properties of the polyurethane elastomer improved with an increase in the number of disulfide bonds increased. Specifically, when the molar ratio of disulfide bonds to IPDA was 5:5, the tensile strength of the composite elastomeric film was 5.22 MPa, with an elongation of 1820.26%. Furthermore, the material exhibited robust thermal stability after undergoing repair at 70°C for 12 h, the mechanical strength of the polyurethane membrane remained unchanged, showing outstanding self‐healing capabilities. Additionally, the polyurethane film served as the substrate material for crafting self‐healing conductive devices, which maintained excellent electrical conductivity even after damage repair. This flexible material, combining impressive mechanical recovery capabilities with electrical performance, holds significant promise for a wide array of applications.

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“…The wall of the microcapsule will be destroyed by external force when micro cracks occur in the coating [ 21 ]. The core material containing a repair agent can repair the cracks [ 22 ]. The application of microcapsule technology in the coating on wood surface can repair the micro-cracks in time at the early stage of microcrack formation that cannot be perceived by the naked eye [ 23 ], avoid causing micro cracks or even breaks to improve the service life of the coating film and prolonging the service life of wood.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Urea-Formaldehyde Microcapsule Containing Fluororesin and Its Effect on Performances of Waterborne Coatings on Wood Surface

Yan

Yin

2021

Polymers

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In order to self-repair the cracks of waterborne coatings on Basswood at room temperature, with fluororesin and waterborne coatings embedded in the shell structure of urea formaldehyde (UF) resin, the microcapsules were fabricated via in-situ polymerization, and the effect of microcapsules on the chroma, gloss, mechanics and repair effect for waterborne coatings on wood was discussed. The results indicated that the coating effect was the most significant when the ratio value of the core materials to the shell material of microcapsules in mass was 0.75, and the agglomeration of particles was the least and the surface was the smoothest when the content of microcapsules was 1.0%. It was negative between the gloss of the film and microcapsule content. The ratio value of the core materials to the shell material in mass and the amount of microcapsules had great influence on the film hardness and adhesion, but had little effect on the impact resistance. When the ratio value of the core materials to the shell material of microcapsules in mass was 0.65 and the addition amount was 4.0–10.0%, the aging resistance of the film was improved most significantly. When the ratio value of the core materials to the shell material of microcapsules in mass was 0.65 and the addition amount was 7.0%, the overall properties of topcoat film on Basswood board was the most significant. It is for the application of fluororesin microcapsules possessing self-repairing effect in waterborne coating on Basswood board that a technical groundwork is provided by this study.

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High-efficiency self-repairing anticorrosion coatings with controlled assembly microcapsules

Cited by 16 publications

References 32 publications

Preparation and Self-Repairing Properties of Urea Formaldehyde-Coated Epoxy Resin Microcapsules

Preparation and Self-Repairing Properties of Urea Formaldehyde-Coated Epoxy Resin Microcapsules

High‐efficiency self‐repairing polyurethane based on synergy of disulfide bonds and graded hydrogen bonds

Synthesis of Urea-Formaldehyde Microcapsule Containing Fluororesin and Its Effect on Performances of Waterborne Coatings on Wood Surface

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