Thermal lens spectrometry to study complex fluids

Baesso, Mauro Luciano; Pereira, J. R. D.; Bento, A. C.; Palangana, A. J.; Mansanares, A. M.; Evangelista, L. R.

doi:10.1590/s0103-97331998000400011

Cited by 22 publications

(10 citation statements)

References 5 publications

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“…The thermal lens method is a sensitive technique used to measure the absolute thermal diffusivity value of liquids. This method is favourable due to its ultrahigh sensitivity, small volume of sample requirement, and its dependence on solvent thermo-optical properties [267,268]. Murshed et al [269] reported the enhancement in effective thermal diffusivity of nanofluids experimentally and found that they exceeded those calculated by (7).…”

Section: Thermal Diffusivitymentioning

confidence: 99%

A Review on Nanofluids: Fabrication, Stability, and Thermophysical Properties

Ali

Teixeira

Addali

2018

Journal of Nanomaterials

307

178

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Nanofluids have been receiving great attention in recent years due to their potential usage, not only as an enhanced thermophysical heat transfer fluid but also because of their great importance in applications such as drug delivery and oil recovery. Nevertheless, there are some challenges that need to be solved before nanofluids can become commercially acceptable. The main challenges of nanofluids are their stability and operational performance. Nanofluids stability is significantly important in order to maintain their thermophysical properties after fabrication for a long period of time. Therefore, enhancing nanofluids stability and understanding nanofluid behaviour are part of the chain needed to commercialise such type of advanced fluids. In this context, the aim of this article is to summarise the current progress on the study of nanofluids, such as the fabrication procedures, stability evaluation mechanism, stability enhancement procedures, nanofluids thermophysical properties, and current commercialisation challenges. Finally, the article identifies some possible opportunities for future research that can bridge the gap between in-lab research and commercialisation of nanofluids.

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Section: Thermal Diffusivitymentioning

confidence: 99%

A Review on Nanofluids: Fabrication, Stability, and Thermophysical Properties

Ali

Teixeira

Addali

2018

Journal of Nanomaterials

307

178

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“…Electronic mail: mlbaesso@uem.br ment presents, in principle, no extra difficulty. [28][29][30] It is precisely this aspect we take advantage of to carry on the thermal properties measurements of polymers as a function of temperature.…”

Section: Introductionmentioning

confidence: 99%

Thermal lens scanning of the glass transition in polymers

Rohling

Caldeira

Pereira

et al. 2001

Journal of Applied Physics

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In this article we discuss the use of the thermal lens technique for investigating the thermal properties of polymers as a function of temperature. It is also discussed how the experimentally determined thermal lens parameters can be used to locate the glass transition in polymers. The methodology is tested using a solution casted films of poly͑vinyl chloride͒ as a testing sample. A comparison with conventional differential scanning calorimetry data is made. It is proposed that the current transient thermal lens methodology, with minor changes in its experimental configuration, could be adapted to develop a new methodology called differential thermal lens scanning especially designed for the investigation of the phase transitions in polymers. It is shown that this new methodology could be equally used for the measurement of the thermal expansion coefficient, above and below the glass transition.

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“…Pulses of ms-width of a continuous wave (cw) single-mode TEM 00 laser beam, obtained by a mechanical shutter, are used to excite the sample and to induce a thermal lens, which is probed by a second cw single-mode TEM 00 laser. The mode-mismatched dualbeam thermal lens technique apparatus is the usual one described elsewhere [37].…”

Section: Methodsmentioning

confidence: 99%

Thermal diffusivity of ferrofluids as a function of particle size determined using the mode-mismatched dual-beam thermal lens technique

Lenart

Astrath

Turchiello

et al. 2018

Journal of Applied Physics

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Ferrouids are colloids of superparamagnetic nanoparticles that are envisaged for use in hyperthermia, which is based on nonradiative relaxation after interaction with a high-frequency magnetic eld or light. For such applications, an important parameter is the thermal diusivity. In this communication, we present an experimental study of the dependence of thermal diusivity of ferrouids on the size of the magnetite nanoparticles by employing the mode-mismatched thermal lens technique. The results show a huge enhancement of the thermal diusivity by increasing the average size of the nanoparticles, while the number density of the nanoparticles is maintained as constant.

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Thermal lens spectrometry to study complex fluids

Cited by 22 publications

References 5 publications

A Review on Nanofluids: Fabrication, Stability, and Thermophysical Properties

A Review on Nanofluids: Fabrication, Stability, and Thermophysical Properties

Thermal lens scanning of the glass transition in polymers

Thermal diffusivity of ferrofluids as a function of particle size determined using the mode-mismatched dual-beam thermal lens technique

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