Preparation of ionic liquid modified graphene and its effect on thermal conductivity of ABS composites
Ionic liquid modified graphene(G@ILs),prepared from graphite powder(G powder)and 1-hexyl-3-aminoethylimidazolium tetrafluoroborate ionic liquid[HAIM]BF4 via a green ball milling method,was blended with acrylonitrile-butadiene-styrene copolymer(ABS)by melt blending method to synthesize G@ILs/ABS composites.The G@ILs was characterized by FTIR,XPS,XRD,Raman spectroscopy,SEM,TEM and EDS.the properties and morphology of ABS composites were tested and characterized.The results showed that[HAIM]BF4 effectively modified graphene through cation-π interactions and maintained the structural integrity of graphene.The G@ILs/ABS composites exhibited considerable improvement in mechanical properties due to the introduction of G@ILs.When the mass fraction of G@ILs was 1.0%,the tensile strength and bending modulus of G@ILs/ABS composites(named 1.0%G@ILs/ABS)were 42.4 MPa and 2145.1 MPa,8.36%and 12.76%higher than those of ABS.In addition,the thermal conductivity of 1.0%G@ILs/ABS was 0.249 W/(m·K),which was 21.5%higher than that of ABS.
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