In order to enhance the dispersion of multi walled carbon nanotubes (MWCNTs) in the epoxy resin (EP) and improve the interface properties of composite materials
polymerized ionic liquid (PIL) was synthesized using 1-vinyl-3-butylimidazolium hexafluorophosphate as monomer and then used to modify the surface of MWCNTs.The modified carbon nanotubes by PIL (PIL-CNTs) were characterized by thermogravimetric analysis (TG)
Raman spectroscopy (Raman) and scanning electron microscopy (SEM).The results showed that PIL can be adsorbed on the surface of MWCNTs and not change the electronic structure of MWCNTs.The PIL-CNTs showed better dispersion in acetone than pristine MWCNTs.PIL-CNTs/EP was prepared by incorporating 0.5 wt% PIL-CNTs into EP with DDM as a curing agent.Analysis of dynamical mechanical properties
mechanical properties and morphology showed the presence of PIL improved the dispersion of MWCNTs and enhanced the mechanical property.In comparison with neat EP and MWCNTs/EP systems
and glass transition temperature was also increased by 5.6 ℃ and 3.3 ℃ than those of neat EP and MWCNTs/EP
respectively.Compared to neat EP
he tensile strength
bending strength and impact strength of PIL-CNTs/EP composites increased by 35.2%
26.4% and 45.0%
respectively.The SEM images of fracture surface indicated the dispersion of PIL-CNTs in the matrix and the interfacial adhesion were obviously improved.
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National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-dimension Materials, College of Materials Science and Engineering, Donghua University
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China
Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China