Evaluation of Thin-Shell Properties of Self-Healing Microcapsules by Reinforcement of Carbon Nanotubes

장정근; 김현지; 윤성호

doi:10.7736/JKSPE.022.089

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저널정보

Korean Society for Precision Engineering
Journal of the Korean Society for Precision Engineering 학술저널
Journal of the Korean Society for Precision Engineering Vol.40 No.1
2023.1 71 - 77 (7page)
DOI : 10.7736/JKSPE.022.089

저자정보

장정근 (금오공과대학교)
김현지 (금오공과대학교)
윤성호 (금오공과대학교)

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초록·키워드

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In this study, thin-shell surface observation, storage capability test, and micro-compressive test were performed for self-healing microcapsules using a field emission scanning electron microscope (FE-SEM) and a micro-compressive testing machine. A microcapsule having a melamine-urea-formaldehyde thin-shell and a microcapsule having a melamine-urea-formaldehyde thin-shell reinforced with carbon nanotubes were used. Two carbon nanotube contents were considered: 0.17 wt% and 0.50 wt%. Thin-wall shell state was relatively smooth when microcapsules were not reinforced with carbon nanotubes. It was uneven when microcapsules were reinforced with carbon nanotubes. Prepared microcapsules showed little decreases of weights even when the exposure time was increased regardless of whether they were reinforced with carbon nanotubes. Thus, their storage capability was good. When carbon nanotube content was the same, the fracture load was almost constant without being affected by the diameter of the microcapsule. However, fracture displacement increased with increasing diameter of the microcapsule. When diameters of microcapsules were similar, fracture load and fracture displacement increased when carbon nanotube content increased. It was found that self-healing microcapsules had good storage capability and mechanical properties. Thus, they could be applied to repair damage to composite materials if thin-shell formation mechanism for adding carbon nanotubes is supplemented.

#Self-healing microcapsules (자기치료용 마이크로캡슐) #Carbon nanotubes (탄소나노튜브) #Storage capability test (보관성능시험) #Micro-compressive test (미소압축시험)