The core and wall interaction were examined by Fourier transform infrared (FTIR) spectroscopy for all the SFD, FD and SD microencapsulated vanillin samples// Similarly, unencapsulated vanillin, b-cyd and WPI were also analysed // FTIR-KBr pure compound was used to pelletize all the samples in this experiment // The scanning was kept in the range of 500–4000 cm1.