1：Experimental Design and Method Selection:

The study involved fabricating ternary composite blends of epoxy, halloysite nanotubes (HNTs), and cellulose acetate butyrate (CAB) with varying concentrations. Methods included differential scanning calorimetry (DSC) for thermal analysis, nanoindentation and nanoscratching for mechanical properties, falling-sand and Taber abrasion tests for damage induction, and atomic force microscopy (AFM) for surface characterization. Healing was induced by heating above the glass transition temperature.

2：Sample Selection and Data Sources:

Samples were prepared with HNT concentrations up to 1.0 vol% and CAB concentrations from 1.5 to 24.0 vol%. Data were collected from mechanical tests, optical measurements, and surface analyses.

3：0 vol% and CAB concentrations from 5 to 0 vol%. Data were collected from mechanical tests, optical measurements, and surface analyses. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Equipment included DSC (TA Instrument Q20), nanoindenter (Hysitron Inc.), AFM (Dimension 3100), falling-sand test apparatus, Taber abrasion tester, tensile tester (Q800, TA Instruments), profilometer (DektakXT-A), UV-Vis spectrometer (Lambda 1050), and goniometer (Ramé-Hart model 590). Materials included epoxy 142-112, halloysite nanotubes from Applied Materials, acetone, and CAB from Sigma Aldrich and Fisher Scientific.

4：0). Materials included epoxy 142-112, halloysite nanotubes from Applied Materials, acetone, and CAB from Sigma Aldrich and Fisher Scientific. Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: Coatings were fabricated using spray coating and UV curing. Mechanical damages were induced via nanoscratching, falling-sand tests, and Taber abrasion. Healing was performed by heating in an oven at temperatures from 50°C to 120°C for varying durations. Properties were measured before and after damage and healing.

5：Data Analysis Methods:

Data were analyzed using software like Gwyddion for AFM, and statistical methods for mechanical and optical properties. Healing efficiency was calculated based on roughness changes and mechanical parameter recovery.