| Encapsulation of Polystyrenic Nanocapsules Containing Reactive Amine with Potential Application in Self-healing Composites |
| Paper ID : 2546-UFGNSM13-FULL |
| Authors: |
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Seyed Hossein Payandeh Gharib Doost1, Sepideh Khoee *2 16 Olfat avenue , Yaghma avenue , Darband street, Tajrish square 2Polymer Chemistry Department, School of Science, University of Tehran, PO Box 14155-6455 Tehran, Iran |
| Abstract: |
| Self-healing polymers are designed to autonomically repair damage. Many of the efforts on developing self-healing systems have focused on chemistries that are different from the host epoxy matrix. However encapsulation of epoxy and its hardener provides a repair system that is chemically and mechanically compatible with host matrix. In practice, preparation of capsules containing a liquid amine is really difficult. McIlroy reported a method for loading diethylenetriamine (DETA), however, the healing capability of these amine capsules was limited by the resulting high viscosity of core content[1] . Another method for encapsulating reactive amine is to prepare hallow capsules then fill them with reactive amine but the yields for this encapsulation procedure ranged from 9.6% to 17.7%. [2]. As a result an effective Encapsulation of a reactive amine can represent a leap forward in self-healing chemistry in an epoxy matrix. Here we report for the first time a new method for encapsulation of reactive amine in polymeric shell via multiple emulsions with potential application in self-healing. The nanocapsules were produced using a multiple-emulsion, solvent evaporation technique, using surfactants with different hydrophilic to hydrophobic ratio. The produced nanocapsules were isolated successfully by freeze drying method and characterized by Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), optical microscopy and scanning electron microscopy (SEM) analysis. Smooth spherical nanocapsules with 60-600 nm in mean diameter are produced by varying concentration of surfactants. Their performance in self-healing nanocomposites is currently under evaluation. |
| Keywords: |
| self healing composites, investigation of size, morphology, epoxy nano capsule, self healing. |
| Status : Paper Accepted (Poster Presentation) |
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