1：Experimental Design and Method Selection:

The study uses a combination of surface modification of graphene oxide (GO) with APTES, reduction with NaBH4, and PVDF grafting using BPO, followed by electrospinning to create fibrous membranes and hot pressing to form solid composites. This method is chosen to achieve good dispersion of graphene in the PVDF matrix and enhance dielectric properties through microcapacitor formation and interfacial polarization.

2：Sample Selection and Data Sources:

Samples include GO, amino-GO, amino-G, SMG, and SMG/PVDF composites with varying SMG content (4 wt.%, 8 wt.%, 12 wt.%, 16 wt.%). Data are sourced from synthesized materials and characterized using various techniques.

3：List of Experimental Equipment and Materials:

Equipment includes TEM (JEOL JEM-2010), SEM (Zeiss Merlin), FTIR (Nicolet/Nexus 670 spectrometer), WAXD (Bruker D8 diffractometer), TGA (Shimadzu DTG-60A), Raman spectroscopy (Renishaw 2000), XPS (Thermal Scientific Escalab 250Xi), impedance analyzer (Agilent 4294A), and thermal conductivity equipment (TPS2500 Hot Disk). Materials include GO, PVDF (Solef 6008), APTES, NaBH4, DMF, ethanol, BPO, acetone.

4：Experimental Procedures and Operational Workflow:

GO is modified with APTES to form amino-GO, reduced with NaBH4 to amino-G, and grafted with PVDF using BPO to form SMG. SMG/PVDF solutions are electrospun into membranes with specific parameters (voltages +15 kV and -2 kV, distance 10 cm, rotation speed 2800 rpm), dried, laminated, and hot-pressed (200°C, 12-14 MPa, 4 minutes) to form composites.

5：Data Analysis Methods:

Data are analyzed using techniques like FTIR peak fitting, WAXD pattern analysis, XPS peak fitting, calculation of β phase content using specific equations, and measurement of dielectric properties and thermal conductivity.