Preparation and characterization of microcapsules based self-healing coatings containing epoxy ester as healing agent

Zhang, Cheng; Wang, Haoran; Zhou, Qixin

doi:10.1016/j.porgcoat.2018.09.028

Cited by 97 publications

(41 citation statements)

References 29 publications

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“…To allow enough repair agents to heal the damage, as many microcapsules as possible should be incorporated without affecting the performance of the coating. Meanwhile, SEM was employed to observe the scratched surface morphology of the self-healing coating to provide intuitive information of the anti-corrosion process of the coatings [32][33][34].…”

Section: Preparation and Characterization Of The Self-healing Coatingmentioning

confidence: 99%

“…Compared with M0, which lost the ability to prevent corrosion completely as R c reached values lower than 4.23 × 10 4 Ω•cm 2 , it can be concluded that the sample with 5.0 wt% microcapsules shows excellent corrosion resistance of 3.31 × 10 5 Ω•cm 2 until 336 h, proving that the microcapsules can release the healing agent and repair the scratch. Therefore, it is a protective method for enhancing the coating with self-healing microcapsules [33,41,42].…”

Section: Electrochemical Corrosion Resistance Of the Self-healing Coamentioning

confidence: 99%

“…The self-healing performance of the scratched coating embedded with different microcapsules content was evaluated by SEM [43]. Zhang et al [33] showed that the micro-cracks in self-healing coatings were automatically covered and healed by healing agents compared to the control sample. As Li et al [34] reported, a narrow gap was left after 15 days, but irregular edges were presented around the scratched area.…”

Section: Electrochemical Corrosion Resistance Of the Self-healing Coamentioning

confidence: 99%

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Preparation and Characterization of Ethylenediamine-Polyurea Microcapsule Epoxy Self-Healing Coating

Zhang

Liu

et al. 2020

Materials

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Polyurea microcapsules with Ethylenediamine (EDA) as the core material were synthesized. A set of characterization methods, including optical and scanning electron microscopy (OM and SEM), the Fourier transform infrared (FTIR) spectroscopy and thermogravimetric analysis (TGA) were used to confirm the microcapsule morphology and chemical structures. The influence of emulsifier content and stirring rate on size and morphology of the microcapsules was investigated, and the self-healing performance of EDA-Polyurea microcapsule/epoxy coatings was evaluated by electrochemical impedance spectroscopy (EIS) measurements. The results showed that the microcapsules obtained had good spherical shape with a mean diameter of 0.54–0.70 μm. Compared with pure core material, the microcapsule showed excellent thermostability, and the content of core materials was up to 56.00 wt%. The epoxy coating with 5.0 wt% EDA-Polyurea microcapsules achieved average corrosion resistance efficiencies of 90.00%, significantly enhancing the capability of the scratched coating to resist external corrosion.

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Section: Preparation and Characterization Of The Self-healing Coatingmentioning

confidence: 99%

Section: Electrochemical Corrosion Resistance Of the Self-healing Coamentioning

confidence: 99%

Section: Electrochemical Corrosion Resistance Of the Self-healing Coamentioning

confidence: 99%

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Preparation and Characterization of Ethylenediamine-Polyurea Microcapsule Epoxy Self-Healing Coating

Zhang

Liu

et al. 2020

Materials

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“…In particular, it was found that adding microcapsules to waterborne coatings can improve the water resistance, wear resistance and the healing properties of coatings [13], which had attracted wide attention [14]. Zhang et al prepared microcapsule-based self-healing coatings containing epoxy ester as a healing agent [15]. Mirabedini et al prepared self-healing acrylic latex coatings using novel oil-filled ethyl cellulose microcapsules with enhanced mechanical properties and healing properties of latex coating [16].…”

Section: Of 14mentioning

confidence: 99%

Effect of Urea-Formaldehyde-Coated Epoxy Microcapsule Modification on Gloss, Toughness and Chromatic Distortion of Acrylic Copolymers Waterborne Coating

2019

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The modification experiment of waterborne coating was carried out by adding microcapsules. The wall material of the microcapsule was urea-formaldehyde resin and the core material of the microcapsule was epoxy resin. Core material can improve the toughness of the coating and prevent the cracking of the coating. The influences of different contents of microcapsules and the order of adding microcapsules in the coating process on the properties of gloss, color difference and toughness were studied. The results showed that the gloss of the waterborne coating decreased with the increase of microcapsule content. The color difference of coating increased first and then decreased, and when the microcapsule content was 8.0%, the color difference was the largest. The toughness of the coatings also increased first and then decreased. When the content of the microcapsule was 10.0%, the toughness of the coating was significantly enhanced. When the microcapsules with a content of 10.0% were added to the waterborne coating, under the same process, the coating gloss of microcapsules added to the primer was relatively high, and the coating gloss was the highest when the coating process was three-layer primer and two-layer topcoat. The microcapsule had little effect on the color difference of coating in different coating processes. When the coating process was three-layer primer and three-layer topcoat, the coating toughness was the best when microcapsules were added to the topcoats. This study provides a basis for industrial application of waterborne coatings to enhance their toughness.

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“…If the self-repairing microcapsule can be added without affecting the performance of the waterborne wood coatings when the coatings are damaged and microcracks occur, the wall of the capsule can be automatically fractured, and the core material is released [13]. The core material (the healing agent) will be polymerized and directly acted to bond the crack [14], and the utilization and safety of the waterborne wood coatings can be improved. Urea formaldehyde resin is hard, scratch-resistant, acid-and alkali-resistant, cheap, and has certain toughness [15].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Urea Formaldehyde @ Epoxy Resin Microcapsule on Waterborne Wood Coatings

2019

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Urea formaldehyde @ epoxy resin microcapsules were prepared by two steps in situ polymerization, and the morphology and composition of microcapsules with different mass ratios of core to wall material were examined by scanning electron microscopy (SEM) and infrared (IR) spectroscopy. The microcapsules were added to the waterborne wood coatings to explore the effect of microcapsules on the properties of coatings and their self-repairing characteristics, and the gloss, hardness, adhesion, and impact resistance of the waterborne wood coatings were investigated. The results showed that when the concentration of microcapsule was 10.0% and the mass ratio of core to wall material was 0.83:1, the waterborne wood coatings had a good comprehensive performance and less negative impact. In the scratch test, the waterborne wood coatings with a concentration of 10.0% microcapsule had good repair ability. The possibility of applying the self-repairing technology of microcapsule to waterborne wood coatings was discussed through the preparation and performance characterization of self-repairing coatings and the results can become a guideline for the engineering application of waterborne wood coatings.

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Preparation and characterization of microcapsules based self-healing coatings containing epoxy ester as healing agent

Cited by 97 publications

References 29 publications

Preparation and Characterization of Ethylenediamine-Polyurea Microcapsule Epoxy Self-Healing Coating

Preparation and Characterization of Ethylenediamine-Polyurea Microcapsule Epoxy Self-Healing Coating

Effect of Urea-Formaldehyde-Coated Epoxy Microcapsule Modification on Gloss, Toughness and Chromatic Distortion of Acrylic Copolymers Waterborne Coating

Preparation and Characterization of Urea Formaldehyde @ Epoxy Resin Microcapsule on Waterborne Wood Coatings

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