Journal of Pure and Applied Ultrasonics

A. Sarangi ¹, G. Nath ², S. K. Swain ³, R. Paikaray ⁴

Affiliations
1 Department of Physics, Christ College, Cuttack, IN
2 Department of Physics, Veer Surendra Sai University of Technology, Sambalpur, Burla, IN
3 Department of Chemistry, Veer Surendra Sai University of Technology, Sambalpur, Burla, IN
4 Department of Physics, Ravenshaw University, Cuttack, IN

Abstract

Ultrasonic wave propagation in solvent mixture is an important technique in fiber engineering technology. Surface bleaching and surface modification of natural fiber can be well maintained when the basic interaction can be studied in natural fiber-reinforced composites with solvent mixture. In the present investigation sisal fiber has been chosen as natural fiber and its surface is treated with solvent mixture of malleic acid with ethanol. The ultrasonic velocities are determined in binary mixture of malleic acid and ethanol with different frequencies (1 MHz, 3 MHz and 5 MHz) at temperature 303 K. The different acoustical properties like intermolecular free length, isentropic compressibility, acoustic impedance and bulk modulus are computed from the ultrasonic velocity and density of the mixture. The variation of these parameters relating to chemical composition of fiber and solvent mixture are discussed in terms of intermolecular interactions.

Keywords

Ultrasonic Velocity, Binary Mixture, Intermolecular Free Length, Isentropic Compressibility, Acoustic Impedance, Bulk Modulus.

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S. P. Mishra ¹, A. Sarangi ², G. Nath ¹

Affiliations
1 Department of Physics, V S S University of Technology, Sambalpur-768018, IN
2 Department of Physics, Christ College, Cuttack-753008, IN

Abstract

The huge deposition of industrial waste and by-product of different agricultural waste in open environment of many regions of India are creating the new environmental problems day by day. The composite materials made from industrial waste or bio-waste has found to be less significant than that of hybrid one. The hybrid composite using coir dust and fly ash particle reinforcement were prepared with proper treatment of blended chemicals by ultrasonic technique. The optimized value of blended chemicals proves its importance in synthesis of better hybrid composite rather than that of unknown proportions of chemicals. The different physico acoustic properties like dielectric constant and sound absorption of synthesized composites has been measured. The results of dielectric measurement and sound absorption property of this material ensures the importance of hybrid composite rather than single composite. The resulting composite property shows that the injection of coir dust and fly ash into it helps in the interface bonding and distribution of absorbed moisture in the material producing a change in dielectric behavior.

Keywords

Coconut Coir Powder, Fly Ash, Ultrasonic Velocity, Acoustic Parameters, Sound Absorbing Material, Dielectric Constant.

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