In the presented work, damping and stiffness properties of thermo plastic reinforced with egg shell micro sized powder has been investigated. The new polymer composite material has been developed for mounting of a Micro Electro Mechanical System (MEMS) sensor. The egg shell micro powder has been coated with a refractory material powder followed by addition in the thermoplastic polymer along with a coupling agent to increase bonding of the micro reinforcement to the polymer. Scanning Electron Microscopy (SEM) and Electronic Dispersion Spectroscopy (EDS) is used to investigate the particle morphology and chemical composition. Later, the composite material specimen is subjected to experimental analysis to determine damping factor and natural frequencies by using impact hammer and accelerometer along with Fast Fourier transform (FFT) analyser. Investigations performed with different proportion of the egg shell reinforcement indicates that maximum improvement in the damping factor up to 235% can be achieved with the egg shell particle reinforcement in comparison to that of the thermoplastics without the reinforcement. Lastly, Finite Element Analysis (FEA) simulations indicate that the proposed composite material can reduce peak acceleration of the MEMS sensor by 43% whereas the force transmitted from the sensor will reduce by 52%, in comparison to that the thermoplastic without egg shell particle reinforcement.

Keywords—Eggshell Micro-powder, Epoxy, Biological-Composite, FEA, Vibrational analysis.