The anisotropic temperature rise on wood surfaces during adsorption measured by thermal imaging

Dupleix, Anna; Nguyen, Tien Van; Vahtikari, Katja; Hughes, Mark

doi:10.1007/s00226-017-0968-8

Cited by 6 publications

(2 citation statements)

References 17 publications

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“…As seen in Figure a, sweat droplets are all‐direction equally spread on the reference PET film with no further transport (no channels thus no transport) but can be transported in the wood slice. This is because wood slice has lumen channels, along which sweat transport // is promoted readily by virtue of capillary force and on the surface of which pits (Figure a) allow the transport ⊥ …”

Section: Resultsmentioning

confidence: 99%

Breathable Nanowood Biofilms as Guiding Layer for Green On‐Skin Electronics

Zhou

Wang

Huang

et al. 2019

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thermoelectric [3,4] and moisture-inducedelectric [5] effects also has gained great attention (skin and on-skin electronics (On-skinE) themselves are energy storehouse). However, several challenges are to be faced, "thin-film" On-skinE I) cannot install "bulky" heatsinks [6] or sweat transport channels, but the output power of the thermoelectric generator and moistureinduced-electric generator depends on the temperature difference (∆T) across generator [4] and the ambient humidity (AH), [5] respectively; II) also lack a routing and accumulation of sweat for biosensing technologies, [7,8] and lack a targeted delivery of drugs for precise feedback transdermal therapy technologies; [9,10] and III) need insulate between the heatgenerating unit and heat-sensitive unit.In these regards, a "routing and accumulation" of heat and sweat can "concurrently" enhance the ∆T/AH-dependent output power, enable a reliable sweatbased biosensing, and prove the ability of targeted delivery of saline-soluble drugs for precise feedback transdermal therapy. Therefore, it is in great demand for developing strong-guiding films, which can help insulate between units and guide the heat and sweat to another in-plane direction.Besides, breathability [3] and stretchability [11] are essential for the on-skin use of electronics with long-term comfort. Several strategies have been proposed to realize the "stretchability" and the strategy placing rigid electronic units on the Thin-film electronics are urged to be directly laminated onto human skin for reliable, sensitive biosensing together with feedback transdermal therapy, their self-power supply using the thermoelectric and moisture-induced-electric effects also has gained great attention (skin and on-skin electronics (On-skinE) themselves are energy storehouses). However, "thin-film" On-skinE 1) cannot install "bulky" heatsinks or sweat transport channels, but the output power of thermoelectric generator and moisture-induced-electric generator relies on the temperature difference (∆T ) across generator and the ambient humidity (AH), respectively; 2) lack a routing and accumulation of sweat for biosensing, lack targeted delivery of drugs for precise transdermal therapy; and 3) need insulation between the heat-generating unit and heat-sensitive unit. Here, two breathable nanowood biofilms are demonstrated, which can help insulate between units and guide the heat and sweat to another in-plane direction. The transparent biofilms achieve record-high transport // /transport ⊥ (//: along cellulose nanofiber alignment direction, ⊥: perpendicular direction) of heat (925%) and sweat (338%), winning applications emphasizing on ∆T/AH-dependent output power and "reliable" biosensing. The porous biofilms are competent in applications where "sensitive" biosensing (transporting // sweat up to 11.25 mm s −1 at the 1st second), "insulating" between units, and "targeted" delivery of saline-soluble drugs are of uppermost priority.

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Section: Resultsmentioning

confidence: 99%

Breathable Nanowood Biofilms as Guiding Layer for Green On‐Skin Electronics

Zhou

Wang

Huang

et al. 2019

Small

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“…At present, there are plenty of indexes to prediction of coal and gas outburst at home and abroad, such as drill cuttings gas desorption index, drillings volume index, index of initial velocity of gas emission from borehole, and temperature index. Among them, the fundamental question involved in predicting the risk of outburst using temperature indicators are temperature changes caused by coal deformation, gas adsorption/desorption, and gas seepage. − The temperature changes in the process of coal and gas outburst mainly include the heat released by coal deformation and adsorbed gas, the heat absorbed by gas expansion and desorption, and the heat diffusion and convection in the process of gas seepage. The adsorption/desorption thermal effect is an important part of coal temperature change.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Thermal Effect during Gas Adsorption and Desorption on the Coal Surface

Hao

Sun

2021

ACS Omega

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The thermal effect of coal adsorption/desorption gas is very important for understanding the evolution of coal temperature and interaction between coal and gas during coal and gas outburst. The pressure difference between the high gas pressure area in front of the working face and the low gas pressure area near the coal wall may affect the adsorption/desorption thermal effect. In order to reveal the characteristics of the coal adsorption/desorption gas thermal effect at different pressure differences, a thermo-hydro-mechanicalcoupled experimental system of coal and gas was designed. Taking no.3 coal from Xinjing Mine as the research object, the characteristics of the coal adsorption/desorption gas thermal effect under different pressure differences are studied by using the cycle-step experiment method. It is found that coal adsorbs gas to release heat, while coal desorbs gas to absorb heat. Also, the temperature variation and temperature accumulation caused by adsorption are greater than those caused by desorption. Under the same pressure difference, the temperature increase rate during the adsorption changes from large to small, and the temperature variation gradually decreases; the temperature decrease rate during the desorption changes from small to large, and the temperature variation gradually increases; desorption is the reverse process of adsorption. The relation between temperature variation and gas pressure is linear, and the increasing range of temperature variation gradually decreases with the increase of pressure difference. The relation between temperature accumulation and gas pressure conforms to an exponential function, and the decreasing range of temperature accumulation gradually decreases with the increase of pressure difference. The greater the pressure difference, the greater is the energy variation caused by the adsorption/ desorption thermal effect. The experimental results of different pressure differences can reflect the characteristics of the coal adsorption/desorption gas thermal effect under different geological structures or outburst types.

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Infrared Thermography as a Powerful, Versatile, and Elegant Research Tool in Chemistry: Principles and Application to Catalysis and Adsorption

Vainer

2020

ChemPlusChem

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In this Review, diverse chemical problems that have been approached by means of infrared thermography (IRT) are covered in depth. Moreover, some novel steps forward in this field are made, described and discussed. Namely, the latest‐generation IRT performance capabilities are harnessed in full; the initial phase of catalytic CO oxidation (called “fast ignition”) is presented at the 0.01 s temporal resolution; at the same resolution, the thermal manifestation of the adsorption‐desorption wave propagation after the gaseous reactant pulsed (0.6 s) wetting is exhibited. Furthermore, a radical difference in the thermal behavior of differently calcined γ‐Al2O3 supported Au catalysts, which underwent successive H2O and CO attacks, is demonstrated, and the generally accepted fact that the catalyst temperature reflects the catalytic activity is validated experimentally. It is shown that latest‐generation IRT may serve as unique and highly informative research tool in chemistry.

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The anisotropic temperature rise on wood surfaces during adsorption measured by thermal imaging

Cited by 6 publications

References 17 publications

Breathable Nanowood Biofilms as Guiding Layer for Green On‐Skin Electronics

Breathable Nanowood Biofilms as Guiding Layer for Green On‐Skin Electronics

Experimental Study on the Thermal Effect during Gas Adsorption and Desorption on the Coal Surface

Infrared Thermography as a Powerful, Versatile, and Elegant Research Tool in Chemistry: Principles and Application to Catalysis and Adsorption

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