Photoacoustic studies on thermal parameters of liquid crystal mixtures

Sajan D. George; A. K. George; P. Radhakrishnan; V. P.N. Nampoori; C. P.G. Vallabhan

doi:10.1088/0964-1726/16/4/042

Photoacoustic studies on thermal parameters of liquid crystal mixtures

Sajan D. George^*, A. K. George, P. Radhakrishnan, V. P.N. Nampoori, C. P.G. Vallabhan

^*Corresponding author for this work

Physics

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Complete thermal characterization of liquid crystal mixtures in the smectic phase consisting of various relative volume fractions of cholesterol and 1-hexadecanol have been carried out using the photoacoustic technique. Thermal diffusivity values of these liquid crystal mixtures are evaluated using the open cell photoacoustic technique whereas the thermal effusivity value is measured using the conventional photoacoustic technique. From the measured values of these transient thermophysical parameters, the thermal conductivity and heat capacity of the sample under investigation are calculated. Analyses of the results show that all the thermophysical parameters depend strongly on the volume fraction of the constituents. Results are interpreted in terms of enhanced hydrogen bonding and the consequent enhancement in cohesive thermal energy transport with increasing volume fraction of 1-hexadecanol.

Original language	English
Article number	042
Pages (from-to)	1298-1301
Number of pages	4
Journal	Smart Materials and Structures
Volume	16
Issue number	4
DOIs	https://doi.org/10.1088/0964-1726/16/4/042
Publication status	Published - Aug 1 2007

ASJC Scopus subject areas

Signal Processing
Civil and Structural Engineering
Atomic and Molecular Physics, and Optics
General Materials Science
Condensed Matter Physics
Mechanics of Materials
Electrical and Electronic Engineering

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abstract = "Complete thermal characterization of liquid crystal mixtures in the smectic phase consisting of various relative volume fractions of cholesterol and 1-hexadecanol have been carried out using the photoacoustic technique. Thermal diffusivity values of these liquid crystal mixtures are evaluated using the open cell photoacoustic technique whereas the thermal effusivity value is measured using the conventional photoacoustic technique. From the measured values of these transient thermophysical parameters, the thermal conductivity and heat capacity of the sample under investigation are calculated. Analyses of the results show that all the thermophysical parameters depend strongly on the volume fraction of the constituents. Results are interpreted in terms of enhanced hydrogen bonding and the consequent enhancement in cohesive thermal energy transport with increasing volume fraction of 1-hexadecanol.",

author = "George, {Sajan D.} and George, {A. K.} and P. Radhakrishnan and Nampoori, {V. P.N.} and Vallabhan, {C. P.G.}",

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AU - George, Sajan D.

AU - George, A. K.

AU - Radhakrishnan, P.

AU - Nampoori, V. P.N.

AU - Vallabhan, C. P.G.

PY - 2007/8/1

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N2 - Complete thermal characterization of liquid crystal mixtures in the smectic phase consisting of various relative volume fractions of cholesterol and 1-hexadecanol have been carried out using the photoacoustic technique. Thermal diffusivity values of these liquid crystal mixtures are evaluated using the open cell photoacoustic technique whereas the thermal effusivity value is measured using the conventional photoacoustic technique. From the measured values of these transient thermophysical parameters, the thermal conductivity and heat capacity of the sample under investigation are calculated. Analyses of the results show that all the thermophysical parameters depend strongly on the volume fraction of the constituents. Results are interpreted in terms of enhanced hydrogen bonding and the consequent enhancement in cohesive thermal energy transport with increasing volume fraction of 1-hexadecanol.

AB - Complete thermal characterization of liquid crystal mixtures in the smectic phase consisting of various relative volume fractions of cholesterol and 1-hexadecanol have been carried out using the photoacoustic technique. Thermal diffusivity values of these liquid crystal mixtures are evaluated using the open cell photoacoustic technique whereas the thermal effusivity value is measured using the conventional photoacoustic technique. From the measured values of these transient thermophysical parameters, the thermal conductivity and heat capacity of the sample under investigation are calculated. Analyses of the results show that all the thermophysical parameters depend strongly on the volume fraction of the constituents. Results are interpreted in terms of enhanced hydrogen bonding and the consequent enhancement in cohesive thermal energy transport with increasing volume fraction of 1-hexadecanol.

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Photoacoustic studies on thermal parameters of liquid crystal mixtures

Abstract

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