Thermoelectric hydrogel with high toughness, fatigue resistance and high thermoelectric performance as well as preparation method and application of thermoelectric hydrogel

Abstract

The invention relates to the field of material science, and discloses a thermoelectric hydrogel with high toughness, fatigue resistance and high thermoelectric performance and a preparation method and application thereof.The preparation method comprises the steps that polyvinyl alcohol is added into aramid nanofiber dispersion, stirred and mixed to be uniform and defoamed, the mixture is immersed into glycerin to complete dimethyl sulfoxide-glycerin solvent exchange, and the hydrogel is obtained; the ANFs / PVA gel is obtained; annealing the ANFs / PVA gel at the temperature of 100-150 DEG C, and soaking the ANFs / PVA gel in deionized water to prepare ANFs / PVA hydrogel; and soaking the ANFs / PVA hydrogel in a mixed aqueous solution containing potassium ferricyanide, potassium ferrocyanide and guanidine hydrochloride to obtain the thermoelectric hydrogel. The thermoelectric hydrogel prepared by the invention has excellent mechanical strength and thermoelectric performance, is simple in preparation process, can be produced on a large scale, is safe and non-toxic, and has a wide application prospect in the fields of flexible thermoelectric conversion, medical sensing monitoring and the like.

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