Mono and di-functional benzoxazines were developed based on both sustainable bio-based cardanol and less hazardous synthetic bisphenol-F using mono and di amino derivatives with paraformaldehyde under appropriate experimental conditions. The molecular structure of the developed benzoxazines was confirmed using FTIR and 1HNMR spectra. The ring opening polymerization of developed benzoxazines was studied using differential scanning calorimetry to ascertain their cure behaviour. The hydrophophic and oleophhilic behaviour of benzoxazines coated melamine foam developed in the present work were ascertained from the values of water contact angle determined using goniometer. The optimum concentration required to transform hydrophilic melamine foam in to hydrophobic/oleophilic nature was studied using varying weight percentage amount of benzoxazines as coating material. Based on the results of water contact angle obtained for 25 wt%, 50 wt%, 75 wt% and 100 wt% of benzoxazine coated on melamine foam, it was ascertained that 50 wt% of benzoxazine was required to obtain maximum water contact angle. The values of water contact angle obtained for 50 wt% of C-a, C-l, C-s, C-h, C-i, BF-l and BF-s are 150˚,153˚,155˚,153˚,158˚,150˚and152˚respectively. It was also noticed that, among the different benzoxazines coated melamine foam, 50 wt% C-i possesses the highest value of water contact angle of 158˚. The oil (engine oil, mineral oil and soybean oil) absorption capacity of different polybenzoxazines coated melamine foam was obtained in the range between 85 and 95 times based on the weight of melamine foam. It is concluded from the results obtained, the materials developed in the present work has great utility in the field of oil/water separation and environmental pollution control.