1：Experimental Design and Method Selection:

The study involved preparing epoxy nanocomposites with varying contents (

2：5, 1, and 2 wt %) of nonfunctionalized porous graphene (NPG), carboxylated porous graphene (CNPG), and amine-functionalized porous graphene (ANPG). The nanomaterials were synthesized and functionalized using chemical methods, and their dispersion in the epoxy matrix was optimized with a reactive diluent. Sample Selection and Data Sources:

Samples included neat epoxy and nanocomposites with different loadings of nanomaterials, as specified in Table I of the paper. Materials were sourced from commercial suppliers and synthesized in-house.

3：List of Experimental Equipment and Materials:

Epoxy resin (Epiran 06), hardener (triethylene tetramine, TETA), reactive diluent (EPOTEC RD108), NPG synthesized via CVD, CNPG and ANPG prepared by chemical modification. Equipment included universal electronic machine (GoTech AL-3000) for tensile tests, impact tester (XCJ-400), FE-SEM for morphology, DMTA for thermomechanical analysis, TGA (Q50, TA Instruments), DSC (Q2000, TA Instruments), multimeter (BK PRECISION A5491) for electrical conductivity, and optical light microscopy (OPTIKA B-380).

4：0). Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: Nanomaterials were dispersed in epoxy-diluent mixture via mechanical stirring and sonication, followed by addition of hardener, molding, and curing. Tests were conducted according to ASTM standards for tensile (D-638) and impact (D-256) properties.

5：Data Analysis Methods:

Data from mechanical, thermal, and electrical tests were analyzed to determine properties such as modulus, toughness, Tg, and conductivity, with averages reported from multiple samples.