Effective Method of Characterizing Specific Liquid Fluorocarbon Interactions Using Ultrasound

Abstract

Several studies have used the analytical results available for structure factor, osmotic pressure, vapor pressure, and suspension viscosity to characterize nanoparticle interactions. In this work a novel attempt has been made to characterize seven different types of liquid per fluorocarbon nanoparticles (LPFC-np) by estimating packing factor, segment diameter, chemical potential, Rao's constant, and adiabatic and isothermal compressibilities using experimental ultrasonic velocity as input. The segment diameter has also been examined by using experimental surface tension and viscosity for comparison. The calculations were extended for different temperatures involving four different equations of state. We have tested the sensitivity of all these parameters to a very small change in the heat capacity ratio. This extensive calculation helps to make a reasonable description about the interactions among the LPFC-np. Also a better correlation could be determined between the interaction of ultrasound with LPFC-np (as a facilitator) and the pure absorption (propagation) of ultrasound by the entire system.

Computational studies on physico-chemical properties in the quality analysis of corn and peanut oil

“…In addition, the glycerol in the oil leaves a space for the fatty acids to occupy and forms a cavity. A system under study is an m-component mixture and this is possible only because the probability of cavity formation is large (Percus and Yevick, 1958;Reiss et al, 1959;Ravi et al, 2008). An equation relating ultrasonic velocity (U) with the change in the molecular weight using the MCSL model incorporating particle interaction in the PY equation is given as (Wertheim, 1963;Yarnell et al, 1973):…”

“…In colloidal science and liquid state theory, the three models (PY, SPT, MCSL) are very important in the study of the distribution of heavy and low weight molecules that are formed when exposed to different temperatures (Reiss et al, 1959;Ravi et al, 2008). Fatty acid molecules in glycerol get distributed in oil depending on the change in the chemical potential (μ/kT), and also in inter-particle potential.…”

Improved Performance of Carbamazepine and Benzodiazepine by Oxygen Enrichment through Perfluorodecalin for Lennox-Gastaut Type of Seizures

“…A drastic increase, almost twice, could be observed in the velocity. Since, the compressibility β=1/U 2 ρ, the value of β has reduced to half, indicating the reduction in molecular interaction energies [37,38] . Hence the feasibility of both the drug and PFD existing together in the form of emulsion for a longer period of time is substantiated.…”

Gels from a semifluorinated n-alkane in fluorinated solvents as a probe for intermolecular interactions

“…r 1 , r 2 , N A , and P are the diameters of the equivalent hard sphere for the solute and the solvent molecules, the Avogadro number, and the pressure, respectively. The values of R, y and G cav were then calculated according to the literature data [42]. The values of DG solv,1 , G cav and G int are listed in Table 1.…”