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Measurement of the thermal conductivity of flexible biosourced polymers using the 3-omega method

Abstract : The thermal conductivity of flexible biosourced polymers was measured by the 3-omega method. Two biopolymers were investigated: the polylactic acid (PLA), a widely used commercial biodegradable one, and the cellulose palmitate (CP), a hydrophobic biosourced material developed in the laboratory, that could be used in electronic or microfluidic applications. The 3-omega method is based-on the use of a metal element as both heating device to thermally disturb the system and temperature sensor. A stencil lithography technique was applied to obtain metallic lines, since biopolymers are not compatible with classical photolithography method. Thermal conductivities of 0.19 and 0.30 W/m.K are obtained respectively for PLA and CP thick films, and 0.12 and 0.22 W/m.K for respectively PLA and CP thin films. These values are close to those measured for petro-sourced substrates or films and so give the possibility to address the applications mentioned.
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https://hal.inrae.fr/hal-02625518
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Submitted on : Tuesday, May 26, 2020 - 2:47:24 PM
Last modification on : Monday, April 26, 2021 - 11:41:19 AM

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G. Boussatour, Pierre-Yves Cresson, B. Genestie, N. Joly, Jean-François Brun, et al.. Measurement of the thermal conductivity of flexible biosourced polymers using the 3-omega method. Polymer Testing, Elsevier, 2018, 70, pp.503-510. ⟨10.1016/j.polymertesting.2018.07.026⟩. ⟨hal-02625518⟩

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