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Influence of hierarchical micro-micro patterning and chemical modifications on adhesion between aluminum and epoxy
- Source :
- International Journal of Adhesion and Adhesives. 66:128-137
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- The main target in the study of aluminum-epoxy resin joints was to enhance adhesion by increasing the surface area of aluminum substrates and by chemical functionalizing the aluminum surface to provide coupling points for epoxy resin. The surface area of the aluminum substrates was increased by fabricating microscale structures and hierarchical micro-microstructures by utilizing a micro-mesh printing technique and sandblasting. The effects of silanization with 3-glycidoxypropyltrimethoxysilane (GPTMS) and of oxygen plasma treatment were also investigated. Compared to a smooth surface, the micro-mesh structures improved shear strength by 33% and the hierarchical micro-microstructures by 116%. The utilization of the oxygen plasma treatment and especially the silane modification of the aluminum substrates were found to be effective in promoting adhesion. The specimens modified by combining the chemical or energetic modification method with surface texturing tended to fracture more cohesively than the specimens having a single modification. The hierarchically patterned and plasma and silane modified specimens had so high adhesion that the aluminum substrates started to deflect during the shear strength measurements, thus preventing the evaluation of their maximum strength.
- Subjects :
- Materials science
Polymers and Plastics
General Chemical Engineering
chemistry.chemical_element
02 engineering and technology
Epoxy
Adhesion
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Silane
0104 chemical sciences
Biomaterials
chemistry.chemical_compound
chemistry
Aluminium
visual_art
Silanization
visual_art.visual_art_medium
Shear strength
Adhesive
Composite material
0210 nano-technology
Microscale chemistry
Subjects
Details
- ISSN :
- 01437496
- Volume :
- 66
- Database :
- OpenAIRE
- Journal :
- International Journal of Adhesion and Adhesives
- Accession number :
- edsair.doi...........586ea50e64417c193840351a3d253879