In situ poly(urea-formaldehyde) microencapsulation of dicyclopentadiene
University of Illinois Urbana-Champaign · University of Tulsa
Abstract
Microencapsulated healing agents that possess adequate strength, long shelf-life and excellent bonding to the host material are required for self-healing materials. Urea-formaldehyde microcapsules containing dicyclopentadiene were prepared by in situ polymerization in an oil-in-water emulsion that meet these requirements for self-healing epoxy. Microcapsules of 10–1000 mm in diameter were produced by appropriate selection of agitation rate in the range of 200–2000 rpm. A linear relation exists between log(mean diameter) and log(agitation rate). Surface morphology and shell wall thickness were investigated by optical and electron microscopy. Microcapsules are composed of a smooth 160–220 nm inner membrane and a…
Citation impact
- FWCI
- 6.87
- Percentile
- 100%
- References
- 19
Authors
4Topics & keywords
- Dicyclopentadiene
- In situ
- Materials science
- Formaldehyde
- Urea-formaldehyde
- Urea
- In situ polymerization
- Chemical engineering