Twistocaloric Modeling of Elastomer Fibers and Experimental Validation

The twistocaloric effect is attributed to the change in entropy of the material driven by torsional stress. It is responsible for the torsional refrigeration of fiber materials that has been widely exploited as one of the solid‐state cooling techniques with high efficiency and low volume change rate...

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Bibliographic Details
Published in:Macromolecular rapid communications. 2023-12, Vol.44 (23), p.e2300275-n/a
Main Authors: Mei, Guangkai, Li, Jiatian, Feng, Danyang, Qian, Dong, Liu, Zunfeng
Format: Article
Language:English
Subjects:
Actuators
Cold Temperature
Elastomers
Fibers
Mathematical analysis
Mathematical models
Maxwell relation
Models, Theoretical
Natural rubber
polymer composites
Refrigeration
Rubber
Shear strain
solid state cooling
Temperature
Temperature effects
Temperature measurement
Torquemeters
Torsional stress
twistocaloric refrigeration
Yarns
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Summary:The twistocaloric effect is attributed to the change in entropy of the material driven by torsional stress. It is responsible for the torsional refrigeration of fiber materials that has been widely exploited as one of the solid‐state cooling techniques with high efficiency and low volume change rate. The lack of theories and mathematical models of twistocaloric effect, however, limits broad applications of torsional refrigeration. In this work, a twistocaloric model is established to capture the relationship between twist density and temperature variation of natural rubber fibers and thermoplastic elastomer yarns. An experimental setup consisting torsion actuator and torque sensor coupled with a temperature measurement system is built to validate the model. Using the Maxwell relationship, twistocaloric coefficient is measured by quantifying the thermal effect induced by torsion under shear strain. The experimental characterization of the twistocaloric effect in natural rubber fiber and thermoplastic elastomer yarn are consistent with the theoretical predictions. The twistocaloric model is established to capture the relationship between twist density and temperature variation of natural rubber fibers and thermoplastic elastomer yarns. An experimental setup consisting torsion actuator and torque sensor coupled with a temperature measurement system is built to validate the model. The experimental characterization of the twistocaloric effect is consistent with the theoretical predictions.
ISSN:1022-1336
1521-3927
DOI:10.1002/marc.202300275