Mechanical behavior and self-healing mechanism of polyurea-based double-walled microcapsule/epoxy composite films

Ma, Yanxuan; Liu, Jiatong; Zhang, Yingrui; Ge, Yajie; Wu, Rui; Song, Xiaohui; Zhang, Peng; Wu, Jian

doi:10.1016/j.porgcoat.2021.106283

Cited by 14 publications

(10 citation statements)

References 36 publications

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“…The aggregation of polymer between the fibers (as seen in the SEM image) and the presence of fluorine (indicated by EDS spectra) proved that the healing agent released and polymerized by the double-shell microcapsules dispersed between the fibers and resin matrix, thus achieving effective self-healing behavior of the interface damage. Additionally, the healing efficiency and time required for self-healing of composites in this study were compared with those reported in previous typical studies, ,,,,− which indicated that the composites in our study exhibited high-efficiency and ultrafast self-healing performance (Figure ).…”

Section: Resultssupporting

confidence: 65%

“…Comparison of self-healing performance and time required between this work and previous typical work. ,,,,− …”

Section: Resultsmentioning

confidence: 96%

“…However, when the microcapsule content was further increased to 20 wt %, microcapsules could agglomerate and disperse unevenly owing to the high microcapsule content. This reduced the strength of the virgin IFSS . Meanwhile, the rupture of the agglomerated microcapsules caused IFSS damage on a larger scale, increasing the difficulty of healing and reducing the effectiveness of healing.…”

Section: Resultsmentioning

confidence: 99%

“…This reduced the strength of the virgin IFSS. 44 Meanwhile, the rupture of the agglomerated microcapsules caused IFSS damage on a larger scale, increasing the difficulty of healing and reducing the effectiveness of healing. Additionally, the rupture led to plenty of the repair agent flowing out and the ultrafast cationic polymerization of epoxy repair agent caused the brittle fracture of the original epoxy resin to become ductile fracture.…”

Section: Characterization Of Double-shell Microcapsulesmentioning

confidence: 99%

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Ultrafast Self-Healing Fiber/Matrix Composite with Single-Component Microcapsules Loaded with Cationic Catalyst

Yuan

Shen

Wang

et al. 2023

ACS Appl. Polym. Mater.

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In this study, ultrafast self-healing of different damage modes in resin and fiber/matrix composites was achieved by incorporating single-component double-shell microcapsules loaded with a cationic catalyst. The formation of stable and size-controllable inner microcapsules was achieved using hydrophilic metal−organic frameworks (MOFs) as stabilizers for the Pickering emulsion. With adjustable nanospaces, MOFs served as a good platform for host− guest interactions, providing an ideal environment for capturing and storing the cationic catalyst. Unlike traditional two-component microcapsule systems, the cationic catalyst could be loaded relatively easily into the double-shell microcapsules. More importantly, a singlecomponent microcapsule system could achieve immediate repair of microcracks in situ as the agents could immediately react with the cationic catalyst upon the rupturing of microcapsules. A satisfactory healing efficiency was achieved along with outstanding mechanical properties of the composite. For example, epoxy resin with 15 wt % microcapsules loading showed 95% healing efficiency within 10 min at room temperature, and the interlaminar shear strength of the composite reached 92% in 5 min.

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Section: Resultssupporting

confidence: 65%

“…Comparison of self-healing performance and time required between this work and previous typical work. ,,,,− …”

Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Section: Characterization Of Double-shell Microcapsulesmentioning

confidence: 99%

See 2 more Smart Citations

Ultrafast Self-Healing Fiber/Matrix Composite with Single-Component Microcapsules Loaded with Cationic Catalyst

Yuan

Shen

Wang

et al. 2023

ACS Appl. Polym. Mater.

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“…The corrosion current density was greatly affected by an increase or decrease in microcapsules and SNPs [ 8 ]. Ma et al reported on epoxy resin coatings containing double-walled microcapsules to achieve self-healing ability with great success [ 14 ]. However, due to its high rigidity, low shock resistance, and hygroscopic properties, the use of epoxy resin as an anticorrosion coating has become questionable.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Alumina-Doped Prunus domestica Gum Grafted Polyaniline Epoxy Resin for Corrosion Protection Coatings for Mild Steel and Stainless Steel

et al. 2022

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Eco-friendly inhibitors have attracted considerable interest due to the increasing environmental issues caused by the extensive use of hazardous corrosion inhibitors. In this paper, environmentally friendly PDG-g-PANI/Al2O3 composites were prepared by a low-cost inverse emulsion polymerization for corrosion inhibition of mild steel (MS) and stainless steel (SS). The PDG-g-PANI/Al2O3 composites were characterized by different techniques such as X-ray diffraction (XRD), UV/Vis, and FTIR spectroscopy. XRD measurements show that the PDG-g-PANI/Al2O3 composite is mostly amorphous and scanning electron micrographs (SEM) reveal a uniform distribution of Al2O3 on the surface of the PDG-g-PANI matrix. The composite was applied as a corrosion inhibitor on mild steel (MS) and stainless steel (SS), and its efficiency was investigated by potentiodynamic polarization measurement in a 3.5% NaCl and 1 M H2SO4 solution. Corrosion kinetic parameters obtained from Tafel evaluation show that the PDG-g-PANI/Al2O3 composites protect the surface of MS and SS with inhibition efficiencies of 92.3% and 51.9% in 3.5% NaCl solution, which is notably higher than those obtained with untreated epoxy resin (89.3% and 99.5%). In particular, the mixture of epoxy/PDG-g-PANI/Al2O3 shows the best performance with an inhibition efficiency up to 99.9% on MS and SS. An equivalent good inhibition efficiency was obtained for the composite for 1M H2SO4. Analysis of activation energy, formation enthalpy, and entropy values suggest that the epoxy/PDG-g-PANI/Al2O3 coating is thermodynamically favorable for corrosion protection of MS and exhibits long-lasting stability.

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Preparation of two‐component micro‐encapsulated epoxy self‐healing materials based on Pickering emulsion method

Wang

Feng

et al. 2023

J of Applied Polymer Sci

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The use of microencapsulated self‐healing materials has been widely applied in many fields, while factors (e.g., the size and content of the microcapsules) markedly affect the mechanical properties of the self‐healing material. In this study, an epoxy‐amine microencapsulated self‐healing material was developed through Pickering emulsion to reduce the effects of the above‐mentioned factors. In this study, the Pickering emulsion was stabilized using two two‐dimensional (2D) materials (i.e., GO and BN), and epoxy microcapsules and amine microcapsules were prepared, with average size of 3.62 and 4.63 μm, respectively. FTIR spectroscopy was used to identify the presence of characteristic PU peaks in the microcapsules, and the bilayer shell microcapsules were well‐prepared. To prepare the binary epoxy resin self‐healing material, two microcapsules were added to the epoxy resin matrix and its mechanical properties were analyzed. Based on the test results, it was suggested that the addition of microcapsules in this study slightly affected the mechanical properties of the material, and the binary self‐healing material still exhibited 89% of the bending stress below the 10 wt% content of the microcapsules. In addition, the tensile stress after repair was 148% of that before. These materials have promising applications in many areas (e.g., engineering technology).

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Mechanical behavior and self-healing mechanism of polyurea-based double-walled microcapsule/epoxy composite films

Cited by 14 publications

References 36 publications

Ultrafast Self-Healing Fiber/Matrix Composite with Single-Component Microcapsules Loaded with Cationic Catalyst

Ultrafast Self-Healing Fiber/Matrix Composite with Single-Component Microcapsules Loaded with Cationic Catalyst

Investigation of Alumina-Doped Prunus domestica Gum Grafted Polyaniline Epoxy Resin for Corrosion Protection Coatings for Mild Steel and Stainless Steel

Preparation of two‐component micro‐encapsulated epoxy self‐healing materials based on Pickering emulsion method

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