A kind of preparation method of composite thermoelectric thin film

Abstract

The invention belongs to the technical field of energy harvesting, in particular to a preparation method of a composite thermoelectric thin film. The method proposed by the present invention is to successively vacuum-plate silver on polyester non-woven fabrics, and heat emboss 1,3-dibenzyl-4,5-cis-bis(p-toluenesulfonyloxymethyl)-2-imidazolidinone , 1,3‑dibenzyl‑tetrahydro‑1H‑thieno[3,4‑d]imidazol‑2(3H)‑one, vacuum aluminized, hot embossed bis(4‑diphenylmethylpiperazine ‑1‑base) methane, screen printing conductive silver glue and polymethyl methacrylate, a multi-layer sandwich structure film; and then annealing the multi-layer sandwich structure film in a hot embossing machine to obtain a composite thermoelectric film. The power factor of the composite thermoelectric thin film measured by a pyroelectric coefficient measuring instrument is 4.8~5.5 mW.m ‑1 .K ‑2 , the thermoelectric figure of merit is 3.6~4.1.

Description

technical field [0001] The invention belongs to the technical field of energy harvesting, in particular to a preparation method of a composite thermoelectric thin film. Background technique [0002] Thermoelectric collection is the conversion of thermal energy into electrical energy, using a physical principle called the Seebeck effect. A Peltier element plus a pair of specific semiconductors generates an electric current whenever there is a temperature difference. For wearable devices, the human body, which is constantly emitting heat, can be used as the hot end, while the environment becomes the cold end. How much energy is produced depends on the difference between the high and low temperatures. Peltier elements can harvest a lot of energy, making them potentially useful for devices that sit next to the skin and have high energy demands. One of the great advantages of thermoelectric recovery is that there is a constant source of energy, whether it is indoors or outdoor...

AI Technical Summary

Problems solved by technology

[0004] Beijing University of Chemical Technology announced a preparation method of polyaniline carbon tube flexible composite thermoelectric thin film material (application publication number: CN109251337A), which solves the difficulties in the preparation of existing thermoelectric materials, complex methods, unstable structures, residual impurities, and poor thermoelectric performance. The ideal technical problem includes the following steps: (1) Weigh the aniline monomer and the oxidant ammonium persulfate and disperse them in hydrochloric acid respectively, gradually add the hydrochloric acid solution of ammonium persulfate into the hydrochloric acid of the aniline monomer, stir and polymerize in an ice bath Prepare polyaniline; (2) dope with ammonia water, wash with water and ethanol until neutral, and dry to obtain intrinsic polyaniline; (3) disperse polyaniline and carbon tubes in a solvent, ultrasonically and stir to prepare polyaniline Obtain the carbon tube-polyaniline dispersion solution; (4) the dispersion solution is vacuum decompressed and suction-filtered and dried on the nanofiber filter screen membrane, and treated with temperature and pressure to obtain the polyaniline-carbon tube flexible composite film material