Preparation method of poly(p-phenylene) nanoparticle composite ZnO-based thermoelectric material system

Abstract

The invention relates to a preparation method of a poly(p-phenylene) nanoparticle composite ZnO-based thermoelectric material system. The preparation method comprises the following steps of: adding poly(p-phenylene) nanoparticles into sulfuric acid of which the concentration is higher than 85%, stirring for 5-10 minutes at 20-50 DEG C, filtering, washing, drying, and carrying out ball milling on a high-energy ball mill for 0.5-4 hours; dissolving 0.1-10mol% of acetate of dopant ion and 2.20g of zinc acetate into 500ml of diglycol, adding 20ml of water, stirring for 10 minutes at 160-170 DEG C, and standing for 2 hours after a white precipitate appears, thereby obtaining ZnO sol; adding the treated poly(p-phenylene) nanoparticles into the ZnO sol, stirring, dispersing for 30 minutes under the ultrasonic condition, heating to 160-170 DEG C, and reacting for 1 hour; and washing the product with anhydrous alcohol and deionized water many times, drying at 100 DEG C, and carrying out discharge plasma sintering to obtain the blocky poly(p-phenylene) nanoparticle composite ZnO-based thermoelectric material. The preparation method provided by the invention has the characteristics of simple and practicable method, low reaction temperature, short reaction time, low energy consumption, good chemical uniformity and the like.

Description

technical field [0001] The invention relates to a preparation method of a poly-p-phenylene nanoparticle composite ZnO-based thermoelectric material system, and belongs to the technical field of preparation of new energy materials. Background technique [0002] With the increasingly prominent energy and environmental issues, people are paying more and more attention to the reuse of a large amount of waste heat released by industrial production, transportation and residential life. The use of devices based on thermoelectric materials for thermoelectric power generation is one of the effective ways to utilize high-temperature waste heat from automobile exhaust and waste incineration. Compared with the commonly used power generation devices with working fluid circulation, thermoelectric power generation technology has the advantages of simple structure, no moving parts, long life, and convenient combination. It is expected to play a huge role in all aspects of human life. Howeve...

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Problems solved by technology

By synthesizing nanostructures, the interfacial scattering of phonons is significantly increased without significantly increasing electron scattering, that is, without significantly changing the electrical conductivity of the material, which is expected to greatly reduce the thermal conductivity of the material; give full play to the lower thermal conductivity of conductive polymers Conductivity, high electrical conductivity and high Seebeck coefficient of inorganic materials, etc., improve the thermoelectric performance of the nanocomposite material system, in order to overcome the difficulties in processing and preparation of traditional thermoelectric materials due to the use of active metal elements, expensive prices, and scarce resources , It is easy to cause environmental pollution and easy to be oxidized at high temperature. However, the thermal conductivity of oxide thermoelectric materials is relatively large, and the coefficient of merit is not easy to increase, which limits its application.

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