Mode II interlaminar fracture toughness of CF/EP composite containing microencapsulated healing resins

Ghazali, Habibah; Ye, Lin; Zhang, Ming Q.

doi:10.1016/j.compscitech.2017.02.018

Cited by 31 publications

(19 citation statements)

References 35 publications

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“…al. [15], such self-healing systems have attracted considerable attention in the research society due to the minimal reduction of the mechanical properties after the incorporation of the self-healing properties, the potential for mass production and the fairly high healing efficiency values [16][17][18][19][20][21][22]. Jin et al [23] developed a polyurethane (PU)-poly(urea-formaldehyde) (PUF) double shell wall capsule system, where the microcapsules containing the epoxy resin and amine (PUF walled) were embedded into an epoxy matrix.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Microcapsule-based self-healing materials: Healing efficiency and toughness reduction vs. capsule size

Kosarli

Bekas

Tsirka

et al. 2019

Composites Part B: Engineering

120

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We report the synthesis of controlled sized Urea-formaldehyde (UF) microcapsules containing an epoxy healing agent via in situ emulsification polymerization for the study of self-healing epoxy systems. Scanning Electron Microscopy (SEM) confirmed that the capsules possessed rough external surface which enhanced mechanical interlocking. Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA) and Solid-state Nuclear Magnetic Resonance (NMR) spectroscopy were employed so as to determine the capsules thermal stability and decompositions and

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Section: Accepted Manuscriptmentioning

confidence: 99%

Microcapsule-based self-healing materials: Healing efficiency and toughness reduction vs. capsule size

Kosarli

Bekas

Tsirka

et al. 2019

Composites Part B: Engineering

120

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“…When the microcapsules were added to the primer and topcoat, the flexibility tester was used to test the coating prepared by different coating processes [25]. After bending, it was found that when bending with the smallest diameter of the steel shaft of 0.5 mm, no cracks appeared in all the coating, which proved that the coating had good flexibility.…”

Section: Flexibility Analysis Of Coatingmentioning

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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“…Over the past two decades, many systems were utilized in the microcapsule‐based self‐healing of fiber composites including chemistry of dicyclopentadiene (DCPD)/ethylidene‐norbornene (ENF), epoxy–imidazoles, epoxy–metal triflates, epoxy–mercaptenes, and organic solvents . The systems based on crosslinking reaction of epoxy resin with hardeners or catalysts have attracted the most attention due to their low cost, versatile chemistry, and compatibility with the base polymeric matrix.…”

Section: Introductionmentioning

confidence: 99%

Autonomous self‐healing based on epoxy resin–imidazole chemistry in carbon fiber‐reinforced polymer composites

Bolimowski

Boczkowska

2018

J of Applied Polymer Sci

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Epoxy resin-imidazole chemistry is used as a new autonomous self-healing system for unidirectional fiber-reinforced polymers and tested for its efficiency in recovery of fracture properties in laminated carbon fiber-reinforced polymers. The dual microcapsule approach is utilized to store and distribute the reactive chemistries in the structure. Microcapsules were located in possible damage regions using polymeric interleaves. Microcapsules containing separately the epoxy resin (EPIDIAN 52-ethyl phenylacetate) and imidazole hardener (1-benzyl-2-methylimidazole) are prepared with poly(urea-formaldehyde) and PMMA shell wall, respectively. Mode I fracture toughness tests are used to evaluate the recovery of the material mechanical properties. At optimized conditions, 117.5% of the interlaminar fracture toughness (G IC ) was recovered after heat treatment at 100 C for 24 h. Furthermore, it is demonstrated that the self-healing efficiency is strongly dependent on the load of microcapsules with the imidazole hardener and that the microcapsules' presence in the laminate has a detrimental effect on the material's mechanical performance.

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Mode II interlaminar fracture toughness of CF/EP composite containing microencapsulated healing resins

Cited by 31 publications

References 35 publications

Microcapsule-based self-healing materials: Healing efficiency and toughness reduction vs. capsule size

Microcapsule-based self-healing materials: Healing efficiency and toughness reduction vs. capsule size

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

Autonomous self‐healing based on epoxy resin–imidazole chemistry in carbon fiber‐reinforced polymer composites

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