Heat conducting nanometer material and preparation method and application thereof

A nano-composite material, nano-scale technology, applied in chemical instruments and methods, fibrous fillers, inorganic pigment processing, etc., can solve the problems of limited improvement in mechanical properties of composite materials, lack of thermal conductivity of composite materials, and reduction of production costs. , to achieve the effect of improving mechanical properties and thermal conductivity, accelerating the pace of industrialization of in-situ composite technology, and reducing costs

Inactive Publication Date: 2012-12-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in order to make the polymer composite materials have insulation while conducting heat, graphite, carbon black, and other high-conductivity fillers are often not added; and AlN and BN are respectively due to factors such as high cost and poor processability. It is not suitable for industrial production of low-cost, high-performance thermally conductive and insulating plastics; more importantly, how to increase the thermal conductivity of the composite material while maintaining other excellent properties of the matrix resin to become a thermally conductive and insulating composite material important direction of research
[0004] Xiao Bo et al. (Xiao Bo, Liu Shumei, Chen Jun, Structure and Properties of PA66 / TLCP / Hallosite Nanotube Ternary Composite [J]. Engineering Plastics Application, 37(4), 10-14) combined liquid crystal and Egyptian The combination of allosite nanotubes and polyamide 66 improves the comprehensive mechanical properties of the composite material, but the halloysite nanotubes in this process are easy to agglomerate, and the halloysite content is only 5wt%, which limits the improvement of the mechanical properties of the composite material. And the prepared composite material does not have thermal conductivity; on the other hand, the liquid crystal content of 10wt% does not fundamentally achieve the purpose of reducing production costs

Method used

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  • Heat conducting nanometer material and preparation method and application thereof
  • Heat conducting nanometer material and preparation method and application thereof
  • Heat conducting nanometer material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Remove the brown part contained in the natural halloysite, dry it with hot air at 90°C for 10 hours, and then pulverize it; take the pulverized halloysite powder, distilled water and powdered sodium hexametaphosphate at a mass ratio of 1:10:0.002 to prepare solution; stirred at room temperature for 24 hours and then stood still for 72 hours; took the clear solution after standing and stratified and dried it with hot air at 90°C for 24 hours until the halloysite became a block; crushed the block halloysite and passed 200 Mesh sieve to obtain nano-scale pure halloysite powder; nano-scale halloysite powder has a tubular structure, which can be called halloysite nanotubes (HNTs), and HNTs is rich in high thermal conductivity components Al2O3 (Al 2 o 3 ), the mass content of aluminum oxide is as high as 40.4%.

[0037]The raw materials of polyamide 66 and Vectra A 950 (TLCP) were vacuum-dried at 110°C for 10 hours; the halloysite nanotubes (HNTs) prepared above were dried i...

Embodiment 2

[0042] Remove the brown part contained in the natural halloysite, dry it with hot air at 90°C for 10 hours, and then pulverize it; take the pulverized halloysite powder, distilled water and powdered sodium hexametaphosphate at a mass ratio of 1:10:0.5% to prepare into a solution; stirred at room temperature for 24 hours and then stood still for 72 hours; took the clear solution after standing and stratified and dried it with hot air at 90 ° C for 24 hours until the halloysite became a block; crushed the block halloysite, and passed 200 mesh sieve to obtain nano-scale pure halloysite powder;

[0043] The polyamide 66 and Vectra A 950 raw materials were vacuum-dried at 110°C for 10 hours; the homemade halloysite nanotubes (HNTs) were vacuum-dried at 100°C for 8 hours; the dried raw materials were prepared according to the following ratio (mass ratio) Preparation of blends: PA66 / TLCP / HNTS were 93.5:4:2.5; 91:4:5; 86:4:10; 81:4:15; the total weight of the blends was 550 grams, and...

Embodiment 3

[0047] Remove the brown part contained in the natural halloysite, dry it with hot air at 90°C for 10 hours, and then pulverize it; take the pulverized halloysite powder, distilled water and powdered sodium hexametaphosphate at a mass ratio of 1:10:1.0% to prepare into a solution; stirred at room temperature for 24 hours and then stood still for 72 hours; took the clear solution after standing and stratified and dried it with hot air at 90 ° C for 24 hours until the halloysite became a block; crushed the block halloysite, and passed 200 mesh sieve to obtain nano-scale pure halloysite powder;

[0048] The polyamide 66 and Vectra A 950 raw materials were vacuum-dried at 110°C for 10 hours; the homemade halloysite nanotubes (HNTs) were vacuum-dried at 100°C for 8 hours; the dried raw materials were prepared according to the following ratio (mass ratio) Preparation of blends: PA66 / TLCP / H NTS are 93.5:4:2.5; 91:4:5; 86:4:10; 81:4:15; the total weight of the blend is 550 grams, after...

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Abstract

The invention discloses a heat conducting nanometer material and a preparation method and application thereof. The composite material comprises the following raw materials in percentage by mass: 51.5 to 91 percent of polyamide 66, 1 to 1.5 percent of silicone resin, 2 to 8 percent of thermotropic liquid crystal Vectra A 950, 5 to 40 percent of nanometer scale halloysite powder and 1 to 7 percent of ethylene-propylene non-conjugated diene elastomer grafting maleic anhydride. The preparation method comprises the following steps of: drying natural halloysite by using hot air, and crushing; preparing mixed solution from the crushed halloysite powder, distilled water and powdery sodium hexametaphosphate, and standing for demixing; and drying the clarified solution by using the hot air, crushing and sieving to obtain purified nanometer scale halloysite powder. The halloysite powder is subjected to nanocrystallization, and a proper amount of compatilizer is added to improve compatibility between the halloysite and a matrix, so that the composite material has higher performance compared with that achieved by the conventional mixed composite technology, and the tensile strength, flexural strength and flexural modulus of the composite material are improved obviously.

Description

technical field [0001] The invention relates to a heat-conducting material, in particular to a heat-conducting nanometer material containing halloysite nanotubes and polyamide 66, which is an in-situ hybrid composite material. Background technique [0002] The excellent comprehensive properties of polyamide make it more and more widely used in the fields of electronics and electrical appliances. With the rapid development of modern electronic assembly technology and the rapid increase of assembly density, it is required that a large amount of heat generated by components during work must be able to be dissipated and conducted in time, otherwise it will affect the normal operation of the system and the stability of component dimensions , thus putting forward higher requirements on the thermal conductivity of the material. However, because the thermal conductivity of plastic materials is generally poor, even the thermal conductivity of high-density polyethylene with the best ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/06C08L83/04C08L51/00C08K9/02C08K3/34C09C1/40C09C3/06C09C3/04
Inventor 宁平甘典松
Owner SOUTH CHINA UNIV OF TECH
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