Synthesis, Characterization and anti-corrosion property of GPTMS functionalized mesoporous silica (F-SBA-15) incorporated aliphatic chain containing polybenzoxazine nanocomposites

Abstract

ABSTRACT The (F-SBA-15) dispersed aliphatic chain containing polybenzoxazine nanocomposite coating materials having better corrosion resistance property has been developed. The new aliphatic chain containing polybenzoxazines is synthesized from n-octylamine, bisphenol-A and paraformaldehyde involving mannich condensation reaction. The structure of polymer and monomer was examined with the help of proton magnetic resonance1NMR spectroscopy and Fourier transform IR spectroscopy. The polybenzoxazine composites were prepared n-octylamine, bisphenol-A and paraformaldehyde and using varying percentages (1, 5, 10 wt%) of GPTMS functionalized mesoporous silica (F-SBA-15) through in situ polymerization process. The polybenzoxazine nanocomposites were characterized using X-ray powder diffraction and scanning electron microscopy. In addition Surface treated (F-SBA-15) dispersed polybenzoxazine nanocomposites has been prepared and studied for their N2 adsorption/desorption, water contact angle, dielectric behavior and anticorrosive properties. The polymer nanocomposites subjected to the highest water contact angle noted at 115° was attained for 10 wt% (F-SBA-15). The value of dielectric constant for neat, 1, 5, 10 wt% (F-SBA-15) incorporated polymer nanocomposites was noted as 4.7, 3.8, 2.9, and 2.1, respectively. The corrosion resistant capacity of BZ/(F-SBA-15), on mild steel specimens, was noticeably higher than that of conventional polybenzoxazine due to the hydrophobic aliphatic chain segments and porous structure of (F-SBA-15).