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In the current study, a self-healing coating was prepared by the synthesis of an absorbent copolymeric gel on the surfaces of titanium dioxide (TiO₂) and its incorporation into epoxy resin. The preparation of the nanogel composite occurred in two steps; firstly, by using 3-(triethoxysilyl) propyl methacrylate (MPS) and then by the absorbent acrylamide (AAm) and acrylic acid (AA) copolymeric gel. The prepared nanogel composite was then added to the epoxy resin in different loading weight percentages (1, 2, and 4). The chemical structure of the synthesized TiO₂ nanogel composite was evaluated using Fourier transform infrared (FTIR), and X-ray diffraction (XRD). In order to investigate the thermal stability and morphology of the nanogel composite thermogravimetric analysis (TGA) and Field Emission Scanning Electron Microscopy (FESEM) were utilized, respectively. The result of the characterization tests verified the …