Shearo-caloric effect enhances elastocaloric responses in polymer composites for solid-state cooling

Author:

Zhang ShixianORCID,Fu Yuheng,Nie Xinxing,Li Chenjian,Zhou Youshuang,Wang Yaqi,Yi Juan,Xia Wenlai,Song Yiheng,Li QiORCID,Xiong ChuanxiORCID,Qian SuxinORCID,Yang QuanlingORCID,Wang QingORCID

Abstract

AbstractRoom-temperature elastocaloric cooling is considered as a zero-global-warming-potential alternative to conventional vapor-compression refrigeration technology. However, the limited entropy and large-deformation features of elastocaloric polymers hinder the creation of the breakthrough in their caloric responses and device development. Herein, we report that the addition of a small amount of inorganic nanofillers into the polymer induces the aggregate of the effective elastic chains via shearing the interlaminar molecular chains, which provides an additional contribution to the entropy in elastocaloric polymers. Consequently, the adiabatic temperature change of −18.0 K and the isothermal entropy change of 187.4 J kg−1 K−1 achieved in the polymer nanocomposites outperform those of current elastocaloric polymers. Moreover, a large-deformation cooling system with a work recovery efficiency of 56.3% is demonstrated. This work opens a new avenue for the development of high-performance elastocaloric polymers and prototypes for solid-state cooling applications.

Funder

National Natural Science Foundation of China

ACS | American Chemical Society Petroleum Research Fund

Publisher

Springer Science and Business Media LLC

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