Photopyroelectric Spectroscopy of Pure Fluids and Liquid Mixtures: Foundations and State-of-the-Art Applications

Balderas‐López, J. A.; Mandelis, Andreas

doi:10.1007/s10765-020-02662-3

Cited by 9 publications

(5 citation statements)

References 37 publications

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“…The experimental set-up used in this work is typical for PPE experiments [4,5]. The radiation source was a 200 mW YAG laser, modulated from its internal power supply.…”

Section: Methodsmentioning

confidence: 99%

“…Afterwards, this heat is measured with a pyroelectric sensor which is located in thermal contact with the sample [1][2][3]. One or two thermal parameters can be directly measured by using the PPE method in various detection configurations [4,5]. It is well known that the static thermal parameter, the volume specific heat, C, is linked with the three dynamic thermal parameters, thermal conductivity, k, diffusivity, α, and effusivity, e, by two relationships [4,5]and consequently, if you want a complete thermal characterization of a material, you need to directly measure at least two of them.…”

Section: Introductionmentioning

confidence: 99%

“…Concerning the type of samples suitable to be investigated by PPE, the best are liquids, because the thermal contact between a liquid sample and a solid sensor is perfect [5]. When investigating solid compounds, a coupling fluid is placed between the sensor and sample, to assure a good thermal contact [4,[6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Non-Contact and Self-Calibrated Photopyroelectric Method for Complete Thermal Characterization of Porous Materials

et al. 2023

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A general theory of a photopyroelectric (PPE) configuration, based on an opaque sample and transparent pyroelectric sensor, backing and coupling fluids is developed. A combined back-front detection investigation, based on a frequency scan of the phase of the PPE signals, followed by a self-normalization of the phases’ behavior, leads to the possibility of simultaneously measuring both thermal effusivity and diffusivity of a solid sample. A particular case of this configuration, with no coupling fluid at the sample/backing interface and air instead of coupling fluid at the sample/sensor interface (non-contact method) is suitable for simultaneous measurement ofboth thermal diffusivity and effusivity (in fact complete thermal characterization) of porous solids. Compared with the already proposed configurations for investigations of porous materials, this novel configuration makes use of a fitting procedure with only one fitting parameter, in order to guarantee the uniqueness of the solution. The porous solids belong to a class of materials which are by far not easy to be investigated using PPE. To the best of our knowledge, porous materials represent the only type of compounds, belonging to condensed matter, which were not taken into consideration (until recently) as potential samples for PPE calorimetric investigations. Consequently, the method proposed in this paper complete the area of applications of the PPE method. Applications on some porous building materials and cellulose-based samples validate the theory.

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“…The experimental set-up used in this work is typical for PPE experiments [4,5]. The radiation source was a 200 mW YAG laser, modulated from its internal power supply.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Non-Contact and Self-Calibrated Photopyroelectric Method for Complete Thermal Characterization of Porous Materials

et al. 2023

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“…The technique is suitable for solids and is excellent for liquids, as it provides excellent thermal contact at the liquid-pyroelectric sensor (PS) interface [33]. PPE technique, finds applications in broader areas, from nondestructive testing and imaging in materials science to medical diagnostics and environmental monitoring [34,35]. In materials testing, PPE technique enables the characterisation of optical and thermal properties with high sensitivity, while in medical diagnostics, it finds utility in analysing structural changes in biological samples [34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

“…PPE technique, finds applications in broader areas, from nondestructive testing and imaging in materials science to medical diagnostics and environmental monitoring [34,35]. In materials testing, PPE technique enables the characterisation of optical and thermal properties with high sensitivity, while in medical diagnostics, it finds utility in analysing structural changes in biological samples [34][35][36][37]. The present paper investigates the nanocarbon-effected thermal effusivity and thermal diffusivity tuning of an ionanofluid by the sensitive and nondestructive photothermal technique-photopyroelectric calorimetry.…”

Section: Introductionmentioning

confidence: 99%

Tuning the Dynamic Thermal Parameters of Nanocarbon Ionanofluids: A Photopyroelectric Study

Swapna,

Tripon,

Farcas

et al. 2024

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The present work delineates the tailoring of the thermal effusivity and diffusivity of the novel class of heat transfer fluids—ionanofluids—by the incorporation of nanocarbons like diesel soot (DS), camphor soot (CS), carbon nanotubes (CN), and graphene (GR). When the thermal diffusivity delivers information on the thermal energy propagation, the thermal effusivity concerns the energy exchange at the interface, enabling energy-efficient thermal system design. The nanocarbons are subjected to morphological characterisation by field emission scanning electron microscopy. Fourier-transform infrared and Raman spectroscopic analyses confirm functional groups and vibrational bands. The microcrystalline size and graphiticity are also understood from the Raman spectrum. Ionanofluids prepared by dispersing nanocarbons into an ionic liquid base 1-Butyl-3-methylimidazolium methyl sulfate (BMMS) are analysed by nondestructive photopyroelectric calorimetry (PPE). The PPE analysis of ionanofluids demonstrates that nanocarbons influence thermal parameters in the base fluid, with soot ionanofluids exhibiting increased thermal effusivity and diffusivity due to their various carbon allotropic composition. This study underscores the importance of selecting the appropriate carbon allotrope for tailoring ionanofluids’ thermal properties, providing insights into manipulating these properties for enhanced performance across various industrial applications.

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On the Importance of Using Reliability Criteria in Photothermal Experiments for Accurate Thermophysical Property Measurements

Balderas-López,

Jaime-Fonseca,

Abrica-González

et al. 2024

Int J Thermophys

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Photopyroelectric Spectroscopy of Pure Fluids and Liquid Mixtures: Foundations and State-of-the-Art Applications

Cited by 9 publications

References 37 publications

Non-Contact and Self-Calibrated Photopyroelectric Method for Complete Thermal Characterization of Porous Materials

Non-Contact and Self-Calibrated Photopyroelectric Method for Complete Thermal Characterization of Porous Materials

Tuning the Dynamic Thermal Parameters of Nanocarbon Ionanofluids: A Photopyroelectric Study

On the Importance of Using Reliability Criteria in Photothermal Experiments for Accurate Thermophysical Property Measurements

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