Method for improving thermoelectric properties of cement-based composite material by ionic liquid

A technology of composite materials and ionic liquids, which is applied in the field of preparation of cement-based composite materials, can solve the problems of poor thermoelectric performance and achieve the effects of improved thermoelectric performance, simple production process, and high ion mobility
CN108264302AActive Publication Date: 2018-07-10西安华清科教产业(集团)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
西安华清科教产业(集团)有限公司
Publication Date
2018-07-10

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Abstract

Provided is a method for improving thermoelectric properties of a cement-based composite material by an ionic liquid. In the process of preparation of the cement-based composite material, the ionic liquid 1-butyl-3-methyl imidazolium bromide ([Bmim]Br) is added. The ionic liquid 1-butyl-3-methyl imidazolium bromide ([Bmim]Br), a carbon fiber, expanded graphite, sulphoaluminate cement and water areevenly mixed by a stirring process, and the mixture is pressed to form the cement-based composite material. The prepared cement-based composite material has the characteristics of high Seebeck coefficient, good thermoelectric property, low cost, simple production process and the like. In the case of greatly increasing the Seebeck coefficient, due to high ionic migration rate of the used ionic liquid, the electrical conductivity of the cement-based composite material is still up to 0.078 S / cm, and the thermoelectric properties of the cement-based composite material are significantly improved.The steps of pretreating the cement-based composite material at the temperature of 80 DEG C can realize uniform distribution of the ionic liquid in the cement base, and the Seebeck coefficient and thethermoelectric properties of the cement-based composite material are further enhanced.
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Description

technical field

[0001] The invention belongs to the technical field of preparation of cement-based composite materials, and in particular relates to a method for improving the thermoelectric performance of cement-based composite materials by ionic liquid. Background technique

[0002] With the development of intelligent buildings, cement-based materials must not only have good mechanical properties and durability, but also have some special functional properties, such as pressure-sensitive properties, piezoelectric properties, electromagnetic shielding, thermoelectric properties, etc. Cement-based composites with thermoelectric properties have broad application prospects in the fields of alleviating the urban heat island effect in summer, energy harvesting, and melting snow and ice with low energy consumption on roads in winter. However, at present, cement-based composite materials still have problems such as low Seebeck coefficient, low electrical conductivity, low thermoel...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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