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Giant Reversible Barocaloric Effects in Nitrile Butadiene Rubber around Room Temperature AITranslate

E. O. Usuda; W. Imamura; N. M. Bom; L. S. Paixão; A. M. G. Carvalho;
Universidade Federal de São Paulo (UNIFESP); Universidade Estadual de Campinas (UNICAMP); Spain|The Institute of Photonic Sciences (ICFO);Laboratório Nacional de Luz Síncrotron (LNLS), Centro Nacional de Pesquisa em Energia e Materiais (CNPEM);Laboratório Nacional de Luz Síncrotron (LNLS), Centro Nacional de Pesquisa em Energia e Materiais (CNPEM)
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Publisher: ACS
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Abstract AITranslate

Elastomers have shown to be promising barocaloric materials, being suitable candidates for solid-state cooling devices. Moreover, this family of polymers presents additional advantages, such as their low cost and long fatigue life. In this context, we investigated the barocaloric effects in nitrile butadiene rubber (NBR) in a large range around room temperature. Applied pressures up to 390 MPa on NBR yield giant reversible isothermal entropy change (ΔST) and adiabatic temperature change (ΔTS), reaching the maximum absolute values of 59(6) J kg–1 K–1 at 303 K and 16.4(2) K at 323 K, respectively, for a pressure change of 390 MPa. Besides, both ΔTS and ΔST have shown to be rather reversible in a wide range of temperatures. For the first time, it was reported the influence of the glass transition on ΔST. Our study evidences the potential of NBR for room-temperature cooling applications based on the barocaloric effect.

KeyWords AITranslate

barocaloric effect mechanocaloric effect nitrile butadiene rubber polymer elastomer solidstate cooling
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Basic Information:

DOI：https://doi.org/10.1021/acsapm.9b00235

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Citation Information:

Elastomers have shown to be promising barocaloric materials, being suitable candidates for solid-state cooling devices. Moreover, this family of polymers presents additional advantages, such as their low cost and long fatigue life. In this context, we investigated the barocaloric effects in nitrile butadiene rubber (NBR) in a large range around room temperature. Applied pressures up to 390 MPa on NBR yield giant reversible isothermal entropy change (ΔST) and adiabatic temperature change (ΔTS), reaching the maximum absolute values of 59(6) J kg–1 K–1 at 303 K and 16.4(2) K at 323 K, respectively, for a pressure change of 390 MPa. Besides, both ΔTS and ΔST have shown to be rather reversible in a wide range of temperatures. For the first time, it was reported the influence of the glass transition on ΔST. Our study evidences the potential of NBR for room-temperature cooling applications based on the barocaloric effect.

quote

GB/T 7714-2015 [1] E. O. Usuda, W. Imamura, N. M. Bom, et al. ACS Applied Polymer Materials, 2019(1). DOI:10.1021/acsapm.9b00235.
MLA [1] E. O. Usuda, et al., ACS Applied Polymer Materials, no. 1, 2019, https://doi.org/10.1021/acsapm.9b00235.
APA [1] E. O. Usuda, W. Imamura, N. M. Bom, L. S. Paixão, & A. M. G. Carvalho. (2019). ACS Applied Polymer Materials(1). https://doi.org/10.1021/acsapm.9b00235
IEEE [1] E. O. Usuda, W. Imamura, N. M. Bom, L. S. Paixão, and A. M. G. Carvalho, ACS Applied Polymer Materials, no. 1, 2019, doi: 10.1021/acsapm.9b00235. keywords: {barocaloric effect;mechanocaloric effect;nitrile butadiene rubber;polymer;elastomer;solidstate cooling}