Synthesis of mica-multiwalled carbon nanotube (MWCNT) hybrid material and properties of mica-MWCNT/epoxy composites coating research

Abstract

Multiwalled carbon nanotubes (MWCNTs) were acidified by mixed acid, and mica was modified with a silane coupling agent (KH560). Hexamethylenediamine was used to connect mica and MWCNTs, and mica-MWCNTs hybrid materials were obtained. The result of cladding was verified through X-ray diffraction (XRD) and scanning electron microscopy (SEM). Composites coated with mica-MWCNTs/epoxy resin, mica/epoxy resin, and pure epoxy were prepared separately. Impedance performance was tested through an electrochemical workstation, and SEM was used to observe the surface condition of the coatings. Thermogravimetric analysis–differential thermogravimetry (TGA-DTG) was used to characterize the thermal stability of the composite coating. The results show that MWCNTs can be well dispersed on the surface of mica when 10% KH560 is added. The composite coating of mica-MWCNTs/epoxy has larger impedance compared with those of the mica/epoxy and pure epoxy. The anticorrosion property of the mica-MWCNTs composite coating increased greatly though SEM, and the thermal degradation rate of composites decreased after coating with CNTs.

Keywords

Mica mica-MWCNTs composites coating properties

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