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Manufacturing method of high-temperature-resistant high-heat-conductivity nano composite floor heating pipe

A nano-composite, high thermal conductivity technology, used in pipes, rigid pipes, mechanical equipment, etc., can solve problems such as affecting heat transfer performance and low thermal conductivity, and achieve excellent mechanical properties, improve thermal conductivity, and reduce production costs.

Inactive Publication Date: 2016-09-21
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its thermal conductivity is very low, which seriously affects the improvement of its heat transfer performance.

Method used

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  • Manufacturing method of high-temperature-resistant high-heat-conductivity nano composite floor heating pipe

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] 25 parts of SiC with a particle size of 20nm, 15 parts of CaCO 3 and 10 parts Al 2 o 3 Add ethanol (the amount of ethanol added is that the nano-SiC and the filler can be completely dissolved) and carry out ultrasonic vibration for 15 minutes, then add 1.5 parts of silane coupling agent, ball mill for 12 hours, filter and dry to obtain the modified mixed powder; 100 parts of linear low density polyethylene (LLDPE) materials were heated to 50°C and stirred evenly; after stirring evenly, 2 parts of calcium stearate heat stabilizer, 4 parts of chlorinated polyethylene impact modifier, 0.5 parts Antioxidant 1010 and 0.5 parts of high temperature resistant pigment copper black, stir evenly, stirring speed 45rpm, stirring time 30 minutes, stirring temperature 50°C, and keep warm for 3 hours; then add the modified mixed powder to it, and stir evenly , the stirring speed is 45rpm, the stirring temperature is 60°C, and the stirring time is 30 minutes; after the stirring is com...

example 2

[0028] 35 parts of SiC with a particle size of 100nm, 10 parts of CaCO 3 and 10 parts Al 2 o 3 Add acetone (the amount of acetone added is enough to completely dissolve the nano-SiC and the filler) and perform ultrasonic vibration for 15 minutes, then add 1.5 parts of titanate coupling agent, ball mill for 12 hours, filter and dry to obtain the modified mixed powder ; Heat 80 parts of linear low-density polyethylene (LLDPE) and 20 parts of low-density polyethylene (LDPE) materials to 55 ° C, and stir evenly; after stirring evenly, add 3 parts of dibasic lead sulfite heat stabilizer, 5 parts of acrylonitrile-butadiene-styrene copolymer (ABS) impact modifier, 1 part of antioxidant 1076 and 0.6 part of high temperature resistant pigment copper black, stir evenly, stirring speed 50rpm, stirring time 40 minutes, stirring The temperature is 60°C, and it is kept for 5 hours; then the modified mixed powder is added to it, and stirred evenly, the stirring speed is 50rpm, the stirring...

example 3

[0030] 45 parts of SiC with a particle size of 500nm, 10 parts of CaCO 3 and 5 Al 2 o 3 Add absolute ethanol (the amount of ethanol added is enough to completely dissolve the nano-SiC and the filler) and perform ultrasonic vibration for 15 minutes, then add 1 part of titanate coupling agent and 0.8 part of silane coupling agent, ball mill for 12 hours, filter and dry, Obtain the modified mixed powder; heat 80 parts of linear low-density polyethylene (LLDPE) and 20 parts of high-density polyethylene (HDPE) to 60°C, and stir evenly; after stirring evenly, add 4 parts of stearin Calcium acid heat stabilizer, 4 parts of ethylene-vinyl acetate copolymer (EVA) impact modifier, 1.5 parts of antioxidant 168 and 0.7 part of copper black, stir evenly, stirring speed 55rpm, stirring time 50 minutes, stirring temperature 65 ℃, and keep warm for 6 hours; then add the modified mixed powder to it, and stir evenly, the stirring speed is 55rpm, the stirring temperature is 65°C, and the stirr...

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Abstract

The invention belongs to the field of preparation methods of nano composite materials and relates to a manufacturing method of a high-temperature-resistant high-heat-conductivity nano composite floor heating pipe. The manufacturing method includes: using nano SiC as a high-temperature-resistant high-heat-conductivity source and a high polymer material as a substrate; utilizing a double-screw extruder for extruding and granulating; utilizing a former for traction and cutting to obtain the pipe. The pipe is cheap in raw material, low in cost, good in heat conducting effect and excellent in mechanical performance. Pressing needs on novel high-heat-conductivity low-energy-consumption composite floor heating pipes of residential heating are met, and the pipe has wide application prospect in the aspect of heat transfer.

Description

technical field [0001] The invention belongs to the field of preparation technology of composite materials, and relates to a preparation method of a nano-composite floor heating pipe with high temperature resistance and high thermal conductivity. Background technique [0002] With the development of the chemical building materials industry, a batch of chemical pipes with good flexibility, high strength, impact resistance and certain heat resistance have come out, providing a breakthrough development opportunity for ground radiant heating. However, its thermal conductivity is very low, which seriously affects the improvement of its heat transfer performance. Silicon carbide is a compound with a strong covalent bond. Common crystal forms include hexagonal α-SiC and cubic β-SiC. Among them, β-SiC has better electrical and thermal conductivity. The thermal conductivity λ is 100-125W / (m·K), and it has higher hardness, better toughness, and is resistant to wear, high temperature,...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L23/28C08L23/06C08L55/02C08K13/06C08K9/06C08K9/04C08K3/34C08K3/26C08K3/22F16L9/12
CPCF16L9/12C08L23/0815C08L2203/18C08L2205/03C08L2201/08C08K2201/011C08L23/286C08K13/06C08K9/06C08K3/34C08K2003/265C08K2003/2227C08L23/06C08L55/02C08K9/04C08L23/0853
Inventor 崔升景峰沈晓冬林本兰
Owner NANJING UNIV OF TECH