Molecular behaviour of polymer based nanofluids using acoustic method

Abstract

The ultrasonic study of polymer based nanofluids is important for understanding the hydrogen bonding and molecular interaction. In the present investigation of ultrasonic study of copper based polymer nanofluids are reported. Polymer colloidal solutions having dispersed nanoparticles of Copper metals have been used to study ultrasonic velocity and other acoustic parameters such as adiabatic compressibility, acoustic impedance, free length and relaxation time. The measurements were carried out at frequency 2 MHz and temperature 298.15 K. Base fluids such as Ethylene glycol (EG), and Poly(propylene glycols) (PPG) having molecular weight 425 have been used for the preparation of nanofluids. The results have been compared and behaviour of ultrasonic velocity and acoustic parameters observed at different particle concentrations reveals the presence of specific molecular interaction between nanoparticles and polymer as colloidal suspension occurs in divided groups in the small micelles.