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Design and Study of Epoxy Composites based on Polycaprolactone and Nanodiamond Functionalized Carbon Fibers

Ayesha Kausar

Abstract


In this study, the carbon fibers were coated with polycaprolactone (PCL) through in-situ polymerization. During this process, different content (1-10 wt. %) of functional nanodiamonds (NDs) were added to form PCL-CFs-NDs. The affect of NDs on the polymerization and molecular weight of PCL was deliberated through gel-permeation chromatography. The weight average molecular weight of PCL was decreased from 42×103 gmol-1 to 18×103 gmol-1 when the polymerization was carried out in the presence of 10 wt. % NDs. The fractographic study showed the formation of polycaprolactone and nanodiamonds coating over the surface of modified carbon nanofibers. The fiber pullout was found to decrease with the filler loading due to better interface bonding and interaction with epoxy. DSC results revealed an increase in the melting temperature with higher NDs content. Epoxy/PCL-CFs-NDs 10 with 10 wt. % filler acquired the tensile strength of 1226 MPa and tensile modulus of 891 MPa.


Keywords


Epoxy; polycaprolactone; carbon fiber; functional nanodiamond; in-situ polymerization

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References


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