Lap shear strength and healing capability of self-healing adhesive containing epoxy/mercaptan microcapsules
- Centre for Advanced Materials Technology (CAMT), School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW 2006 (Australia)
- Key Laboratory of Polymeric Composite and Functional Materials of Ministry of Education, Zhongshan University, Guangzhou 510275 (China)
The aim of this work is to develop a self-healing polymeric adhesive formulation with epoxy/mercaptan microcapsules. Epoxy/mercaptan microcapsules were dispersed into a commercialize two-part epoxy adhesive for developing self-healing epoxy adhesive. The influence of different content of microcapsules on the shear strength and healing capability of epoxy adhesive were investigated using single-lap-joints with average thickness of adhesive layer of about 180 µm. This self-healing adhesive was used in bonding of 5000 series aluminum alloys adherents after mechanical and alkaline cleaning surface treatment. The adhesion strength was measured and presented as function of microcapsules loading. The results indicated that the virgin lap shear strength was increased by about 26% with addition of 3 wt% of self-healing microcapsules. 12% to 28% recovery of the shear strength is achieved after self-healing depending on the microcapsules content. Scanning electron microscopy was used to study fracture surface of the joints. The self-healing adhesives exhibit recovery of both cohesion and adhesion properties with room temperature healing.
- OSTI ID:
- 22589318
- Journal Information:
- AIP Conference Proceedings, Vol. 1713, Issue 1; Conference: PPS-31: 31. international conference of the Polymer Processing Society, Jeju Island (Korea, Republic of), 7-11 Jun 2015; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ADHESION
ADHESIVES
ALUMINIUM ALLOYS
EPOXIDES
FRACTURES
HEALING
JOINTS
LAYERS
LOADING
MATERIALS RECOVERY
ORGANIC POLYMERS
SCANNING ELECTRON MICROSCOPY
SHEAR PROPERTIES
SURFACE TREATMENTS
SURFACES
TEMPERATURE RANGE 0273-0400 K
THIOLS