Super-hydrophobic silane functional cardanol based sustainable polybenzoxazine-silica hybrids: Thermal, flame resistant and oil-water separation properties

Abstract

Abstract In this work, an effort has been made to develop silane functional cardanol based polybenzoxazine-silica hybrid material for high thermal, flame resistant, super hydrophobic and oil-water separation applications. Silane functional cardanol based benzoxazine (C-aptes) monomer is synthesized using cardanol, 3-aminopropyltriethoxysilane (APTES) and paraformaldehyde through Mannich condensation reaction. Later, C-aptes and various weight percentages (0, 25, 50, 75, 100 wt. %) of tetraethylorthosilicate (TEOS) solution is coated on cotton fabric/ or filter paper and polymerized via thermal induced ring opening polymerization. The developed Poly(C-aptes)-silica hybrid materials are utilized to check their molecular structure, thermal, flame resistant, hydrophobic, oil-water separation properties. Data attained from thermal, flame resistant, and hydrophobic studies, conferred that the prepared eco-friendly hybrid poly(C-aptes)-silica revealed higher properties with superior oil-water separation behaviour over the neat PBZ matrices. Consequently the developed sustainable bio-based poly(C-aptes)-silica hybrid materials will be able to useful in hydrophobic coatings and oil-water separations.