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One-step amino-functionalization of milled carbon fibre for enhancement of thermo-physical properties of epoxy composites
journal contribution
posted on 2016-09-01, 00:00 authored by Omid ZabihiOmid Zabihi, Mojtaba Ahmadi, Sajjad Shafei, Seyed Mohsen Seraji, Seyedeh Azam Oroumei, Minoo NaebeMinoo NaebeDevelopment of new chemical approaches for preparation of engineered carbon-based fillers is critical for high-performance applications. Herein, an efficient method for covalent functionalization of polyacrylonitrile-based carbon fibre through azo radical addition under mild condition is demonstrated. In this way, isobutyronitrile radicals in situ produced from thermal decomposition of 2,2′-azobisisobutyronitrile (AIBN), were covalently grafted on milled carbon fibre (MCF) surface, assisted by microwave irradiation, as evidenced by FTIR, Raman, and TGA analysis. The grafted isobutyronitriles on MCF surface (n-MCF) were applied for further MCF amino-functionalization (a-MCF) via nucleophilic reaction of an amine-rich compound. Then, both pure MCF and a-MCF were incorporated into epoxy matrix; and its curing process and thermo-physical properties were investigated using DSC, rheometry, DMA, TGA, and flexural analysis. The Tg and flexural strength of epoxy/a-MCF composites, compared to epoxy/MCF, increased by ∼3.5% and ∼10.2%, resulting from good adhesion between a-MCF and epoxy matrix which confirmed by SEM observations.
History
Journal
Composites part A: applied science and manufacturingVolume
88Pagination
243 - 252Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
1359-835XeISSN
1878-5840Language
engPublication classification
C Journal article; C1 Refereed article in a scholarly journalCopyright notice
2016, ElsevierUsage metrics
Categories
Keywords
carbon fibrespolymer-matrix composites (PMCs)interface\/interphasethermal propertiesScience & TechnologyTechnologyEngineering, ManufacturingMaterials Science, CompositesEngineeringMaterials ScienceINTERFACIAL PROPERTIESMECHANICAL-PROPERTIESREINFORCED POLYMERSSURFACE-TREATMENTNANOTUBESRESINRAMANVISCOSITYCOVALENTSTRENGTHAerospace EngineeringMechanical Engineering
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