The synergic effect of microcapsules and titanium nanoparticles on the self-healing and self-lubricating epoxy coatings: A dual smart application

Ghorbani, Maryam; Ebrahimnezhad‐Khaljiri, Hossein; Eslami‐Farsani, Reza; Vafaeenezhad, Hasan

doi:10.1016/j.surfin.2021.100998

Cited by 29 publications

(23 citation statements)

References 34 publications

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“…Thus, it was a key point to avoid the contact between oil and EP, and the encapsulation technique was a suitable resolution. Ghorbani et al, Ma et al, and Li et al investigated the tribological properties of EP composites with the modification of oil-containing microcapsules. It was found that the synergistic effect of liquid lubricants and polymer shells can greatly reduce the COF and the wear rate.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Tribological Properties of Self-Lubricating Epoxy Resins with Oil-Containing Nanocapsules

Xiong

Chen

et al. 2022

ACS Appl. Mater. Interfaces

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The design and development of self-lubricating materials aid in enhancing the tribological performance and prolonging the service life of aero self-lubricating spherical plain bearings. Herein, monodisperse hollow mesoporous carbon nanospheres (HMCNs) with thin shell thickness and uniform particle size were synthesized. Afterward, oil-containing nanocapsules (Oil@HMCNs) were obtained by the impregnation method, which was an innovative approach to prepare nanoscale capsules. The Oil@HMCNs were monodispersed, and the oil content rate could reach 45 wt %. The nanocapsules were applied as additives to achieve the self-lubricating properties of epoxy resin (EP). It was revealed that the coefficient of friction (COF) and the wear rate of EP in dry friction can be decreased from 0.56 to 0.084 and from 50.15 × 10–6 to 0.27 × 10–6 mm3/N/m, respectively. The tribological properties of EP composites in dry friction are better than those of EP with external oil. According to the analysis of friction pairs, the antifriction performance was contributed by the released automatic transmission fluid 6HP (ATF6) from nanocapsules. Meanwhile, the presence of ATF6 effectively could inhibit fatigue wear, and the decrease of compressive strength and surface hardness led to plastic deformation and mechanical polishing. Both resulted in a lower wear rate of EP. In conclusion, this work explored the application possibility of hollow mesoporous materials in lubrication. The prepared EP composites exhibited excellent tribological performances and self-lubricating properties, which were expected to be applied to self-lubricating spherical plain bearings and other mechanical parts.

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Section: Introductionmentioning

confidence: 99%

Preparation and Tribological Properties of Self-Lubricating Epoxy Resins with Oil-Containing Nanocapsules

Xiong

Chen

et al. 2022

ACS Appl. Mater. Interfaces

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“…The extrinsic healing approach has been adapted for higher melting point processed metals as a healing agent is stored in hollow fibre or tubes, microvascular networks etc. and reinforced in the matrix [3][4][5][6]. The damage control that occurs without the intervention of human effort comes under the category of passive modes.…”

Section: Introductionmentioning

confidence: 99%

Evaluation and Prediction of Self-healing Assessments for AA2014 Based Hybrid Smart Composite Structures: A Novel Fuzzy Logic Approach

Srivastava

Gupta

2022

IJE

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An idea to heal the damaged surface through healing agents in metallic composite are at their developmental stage. Therefore, the selection of design parameters for a new generation smart composite is more complex and difficult. In the present study the two case studies on self healing smart strucures are included with different input design parameters to evaluate the healing properties. Taguchi based L-8 experiments were conducted to analyze the influencial parameters responsible for higher self healing assessments (i.e. recovery in crack width, recovery in crack depth and flexural strength recovery). To evaluate the self-healing assessments of the damaged structure, a soft computing technique based on S/N ratio from ANOVA analysis is obtained. The experimental results were further considered for constructing the fuzzy logic predictive model. Linear regression models i.e. a statistical tool is generated to judge the accuracy of the fuzzy based predicted model through various error analyses. Based on S/N ratio Fuzzy logic model, results show less error values of 6.33 and 4.94 % for case studies I and II, respectively in compared to the regression model adapted for all self-healing assessments. The model offers a close resemblance with the experimental observations even with less number of experimental runs. This concludes that the fuzzy logic model provides a powerful soft computing tool to perform large research work related to the design of input parameters for metallic based self-healing composites structures in near future.

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“…al. [13] added linseed oil microcapsules into epoxy coatings, and the friction coefficient of final composites was 0.1, showed outstanding selflubricating performances. Khun et al [12,14] prepared successfully self-lubricant materials by embedding liquid wax microcapsules in silicone and encapsulated hexamethylene diisocyanate (HDI) in epoxy resin, obtaining interesting effects.…”

Section: Introductionmentioning

confidence: 99%

“…Fig 13. The wear width (a) and depth (b) of pure epoxy samples, composites metal microcapsules-10 wt%, composites metal microcapsules-30 wt%, and composites polymer microcapsules-10 wt% as a function of sliding velocity (25 REV, 50 REV, and 100 REV).…”

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confidence: 99%

Tribological Investigation of Self-Healing Composites Containing Metal/Polymer Microcapsules

Sun¹,

Yan²,

Ma³

et al. 2021

ES Mater. Manuf.

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The tribological properties of epoxy composites containing metal microcapsules and polymer microcapsules were investigated systematically. Both metal microcapsules and polymer microcapsules showed obvious core shell structures. The diameter of metal microcapsules and polymer microcapsules was 200.7±44.5 μm and 185.2±44.2 μm with a corresponding core fraction of 23.5±1.3 wt% and 75.0±2.1 wt%, respectively. The epoxy composites containing metal microcapsules possessed higher compressive strength than that containing polymer microcapsules, but its compressive modulus remained stable relatively with microcapsule concentrations, comparing with the gradual decrease of compressive modulus of composites containing polymer microcapsules. Besides, the friction coefficient of epoxy composites containing polymer microcapsules (less than 0.1) was several times lower than that of epoxy composites containing metal microcapsules (around 0.55). The friction coefficients of epoxy composites containing polymer microcapsules were decreased under higher microcapsules concentrations, but that of epoxy composites containing metal microcapsules was increased with microcapsules concentrations. Although composites containing metal microcapsules had higher strength and modulus than that containing polymer microcapsules, its wear loss including wear depth and wear width was far more than the composites containing polymer microcapsules under different normal loads and velocities.

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The synergic effect of microcapsules and titanium nanoparticles on the self-healing and self-lubricating epoxy coatings: A dual smart application

Cited by 29 publications

References 34 publications

Preparation and Tribological Properties of Self-Lubricating Epoxy Resins with Oil-Containing Nanocapsules

Preparation and Tribological Properties of Self-Lubricating Epoxy Resins with Oil-Containing Nanocapsules

Evaluation and Prediction of Self-healing Assessments for AA2014 Based Hybrid Smart Composite Structures: A Novel Fuzzy Logic Approach

Tribological Investigation of Self-Healing Composites Containing Metal/Polymer Microcapsules

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