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In this work, multi-walled carbon nanotubes (MWCNTs) coated with surfactant and biomacromolecule were embedded in polyvinylidene fluoride (PVDF) by solution blending.Fourier transform infrared (FTIR) and X-Ray diffraction (XRD) were employed to analyze whether the MWCNTs have been functionalized or not.Ultraviolet and visible spectrophotometer (UV-Vis), dynamic light scattering (DLS) were adopted to investigate the dispersion of MWCNTs and coated MWCNTs in solvents.