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Polymer sheath-core composite fiber with thermoelectric effect as well as preparation method and application thereof

A composite fiber and thermoelectric effect technology, applied in the direction of conjugated synthetic polymer artificial filament, fiber treatment, fiber chemical characteristics, etc., can solve the problems of low thermoelectric power factor, low conductivity and Seebeck coefficient of organic thermoelectric materials, etc., Achieve excellent thermoelectric properties, good industrialization prospects, and simple preparation process

Active Publication Date: 2017-05-10
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low conductivity and Seebeck coefficient of organic thermoelectric materials make their thermoelectric power factors low, which is only equivalent to one thousandth of the current ideal inorganic thermoelectric materials.

Method used

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  • Polymer sheath-core composite fiber with thermoelectric effect as well as preparation method and application thereof
  • Polymer sheath-core composite fiber with thermoelectric effect as well as preparation method and application thereof
  • Polymer sheath-core composite fiber with thermoelectric effect as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Using high-purity bismuth telluride and graphene (3-6 layers) powder as raw materials, according to the stoichiometric ratio of 50 g bismuth telluride and 30 g graphene, weigh a total of 80 g of powder and put it into a ball mill tank. Perform ball milling with a ball-to-material ratio of 13:1, a rotating speed of 350 r / min, and a ball milling time of 12 hours to obtain micron-sized powders. After mixing the obtained micron-sized powder with PP (20g), put it into a twin-screw blender, set the screw temperature at 180°C, and the extrusion speed at 5 kg / h, and then immerse the extruded material in a water bath to cool down , pelletized, and dried to obtain a thermoelectric masterbatch.

[0037] Two-component compound spinning screw extruder In the process, the thermoelectric masterbatch is put into the core material hopper, the cortex is put into pure PP, and the mass ratio of the cortex to the core is 1:2; the spinning process parameters are set as follows: spinning te...

Embodiment 2

[0039]Using high-purity bismuth telluride and graphene (3-6 layers) powder as raw materials, according to the stoichiometric proportion of 20 g of bismuth telluride and 5 g of graphene, weigh a total of 25 g of powder and put it into a ball mill tank. Perform ball milling with a ball-to-material ratio of 13:1, a rotating speed of 350 r / min, and a ball milling time of 12 hours to obtain micron-sized powders. Mix the obtained micron-sized powder with PA6 (75 g), put it into a twin-screw blender, set the screw temperature at 270°C, and the extrusion speed at 5 kg / h, and then immerse the extruded material in a water bath Cool down, pelletize, and dry to obtain thermoelectric masterbatch.

[0040] Two-component compound spinning screw extruder In the process, the thermoelectric masterbatch is put into the core material hopper, the cortex is put into pure PA6, and the mass ratio of the cortex to the core is 1:1; the spinning process parameters are set as follows: spinning temperat...

Embodiment 3

[0042] Using high-purity bismuth telluride and graphene (3-6 layers) powder as raw materials, according to the stoichiometric proportion of 40 g bismuth telluride and 20 g graphene, weigh a total of 60 g of powder and put it into a ball mill tank. Perform ball milling with a ball-to-material ratio of 13:1, a rotating speed of 350 r / min, and a ball milling time of 12 hours to obtain micron-sized powders. After mixing the obtained micron-sized powder with PET (40 g), put it into a twin-screw blender, set the screw temperature at 220 ° C, and the extrusion speed at 5 kg / h, and then the extruded material is immersed in a water bath Cool down, pelletize, and dry to obtain thermoelectric masterbatch.

[0043] Two-component compound spinning screw extruder In the process, the thermoelectric masterbatch is put into the core material hopper, the cortex is put into pure PET, and the mass ratio of the cortex to the core is 2:1; the spinning process parameters are set as follows: spinni...

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Abstract

The invention discloses a polymer sheath-core composite fiber with a thermoelectric effect as well as a preparation method and application thereof. The polymer sheath-core composite fiber is composed of a polymer sheath layer and a thermoelectric master batch material core layer, wherein the mass ratio of the sheath layer to the core layer ranges from (2 to 1) to (1 to 2); the polymer sheath layer is prepared from one of polypropylene, polyamide 6, polyamide 66 and polyethylene terephthalate resin; the thermoelectric master batch material core layer is composed of ternary components including carbon nanotubes / graphene, bismuth telluride and resin. According to the polymer sheath-core composite fiber disclosed by the invention, the graphene, the bismuth telluride and the macromolecule resin are used as raw materials, and are subjected to methods including melting and commixing, solid-phase force shearing and the like, so that uniform dispersion of a graphene and bismuth telluride compound phase is realized in one step. After thermoelectric master batches are prepared, a melting compounded spinning technology is adopted to prepare a sheath-core composite thermoelectric fiber material. The fiber material has an important application prospect in the field of thermoelectric conversion. The polymer sheath-core composite fiber can be made into a thermoelectric refrigerating device which is arranged in a fabric and clothes; the temperature can be adjusted and the temperature is comfortable and adjustable.

Description

technical field [0001] The invention belongs to the field of thermoelectric materials and device preparation, and relates to fibers with thermoelectric properties and devices made of such fibers. Specifically, it is a polymer sheath-core composite fiber with thermoelectric effect and its preparation method and application. Background technique [0002] worldwide problem. Therefore, the development and use of new green energy has become very urgent. However, in industrial production and life, there are many unavoidable generated but discarded heat energies, such as geothermal heat, frictional heat generation, automobile exhaust, hot steam discharged from boilers, waste heat from steel plants, etc. If these waste heat can be processed Effective recycling will be an effective means to alleviate the non-renewable energy crisis. Thermoelectric materials are functional materials that can directly convert heat and electricity into each other. [0003] Thermoelectric materials r...

Claims

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Application Information

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IPC IPC(8): D01F8/06D01F8/12D01F8/14D01F1/10D01D5/34
CPCD01D5/34D01F1/10D01F8/06D01F8/12D01F8/14
Inventor 刘海辉刘艳欣靳艳梅张兴祥王建平
Owner TIANJIN POLYTECHNIC UNIV
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