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A kind of nylon composite material containing secondary surface modified filler and its preparation method

A nylon composite material and a composite material technology are applied in the field of nylon composite materials containing secondary surface modified fillers and their preparation, which can solve the problems of poor mechanical properties of composite materials, poor compatibility of substrates, etc., and increase the interface bonding force. , The effect of improving mechanical properties and improving heat resistance

Active Publication Date: 2021-06-04
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the composite materials made of PA, PPO and PP have the characteristics of high temperature resistance and excellent thermal conductivity, at the same time, due to the poor compatibility of the matrix, the mechanical properties of the final composite materials will be deteriorated.

Method used

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  • A kind of nylon composite material containing secondary surface modified filler and its preparation method
  • A kind of nylon composite material containing secondary surface modified filler and its preparation method
  • A kind of nylon composite material containing secondary surface modified filler and its preparation method

Examples

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preparation example Construction

[0040] Please also refer to Figure 1-3 Shown, the present invention also provides a kind of preparation method of the nylon composite material containing secondary surface modification filler, it comprises the following steps at least:

[0041] S1 uses an aminosilane coupling agent to modify the filler surface once. In order to make the aminosilane coupling agent have a larger grafting rate, the aminosilane coupling agent is weighed according to 1%-1.5% of the mass of the thermally conductive filler. The aminosilane coupling agent can be one of 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane species or several. Mix the aminosilane coupling agent with ethanol and water, and the molar amount of ethanol is 4-5 times that of the aminosilane coupling agent. In this range, the aminosilane coupling agent can be fully diluted to effectively expand the aminosilane coupling agent. The distance between the linker molecules. ...

Embodiment 1

[0047] Mix 20 g (0.09 mol) of 3-aminopropyltriethoxysilane with 0.45 mol of ethanol and 0.27 mol of water, and hydrolyze at 30°C for 40 minutes to obtain an aminosilane coupling agent hydrolyzate. Weigh 1000g of silicon micropowder and 1000g of boron nitride dried in an oven for 8 hours, add them to a high-speed mixer, and when the materials reach 110°C, add aminosilane coupling agent hydrolyzate evenly, and continue stirring for 50 minutes; then raise the temperature to 125°C and add 100g of iso Triglycidyl cyanurate was mixed at high speed for 60 minutes, and then dried in an oven at 105°C for 8 hours to prepare a thermally conductive filler with multiple epoxy groups on the surface.

[0048] Dry nylon 6 at 105°C in a vacuum oven for 8 hours, take 34 parts of dried nylon 6, 6 parts of nylon 1212, 60 parts of the above-mentioned thermally conductive filler with multiple epoxy groups on the surface, 0.1 part of antioxidant (antioxidant Agent 1010 and antioxidant 168 are used i...

Embodiment 2

[0050] Mix 30 g (0.14 mol) of 3-aminopropyltrimethoxysilane with 0.7 mol of ethanol and 0.42 mol of water, and hydrolyze at 30° C. for 30 min to obtain an aminosilane coupling agent hydrolyzate. Weigh 1,000g of silicon carbide and 1,000g of boron nitride dried in an oven for 8 hours, add them to a high-speed mixer, and when the materials reach 110°C, add aminosilane coupling agent hydrolyzate evenly, continue stirring for 50 minutes, then raise the temperature to 135°C, and add 80g of isocyanide Triglycidyl urate was mixed at high speed for 50 minutes, and then dried in an oven at 105°C for 8 hours to prepare a thermally conductive filler with multiple epoxy groups on the surface.

[0051] Dry nylon 6 at 105°C in a vacuum oven for 7 hours, take 44 parts of dried nylon 6, 6 parts of nylon 1012, 50 parts of the above-mentioned thermally conductive filler with multiple epoxy groups on the surface, 0.2 parts of antioxidant, 0.2 parts of bismuth Methylimidazole was added to a high-...

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Abstract

The invention discloses a nylon composite material containing secondary surface modified filler and a preparation method thereof, and relates to the technical field of engineering plastics. The nylon composite material of the present invention at least contains the following raw materials in parts by mass: nylon: 25-50 parts; secondary surface modification filler: 50-75 parts. In the present invention, by melting and blending the secondary surface modified filler and nylon, the epoxy group of the secondary surface modified filler can react with the amino or carboxyl functional group of nylon, introduce a molecular structure with large steric hindrance, and limit the nylon chain segment It improves the heat resistance of the composite material, and at the same time increases the interface bonding force between the nylon and the thermally conductive filler, effectively improving the thermal conductivity and mechanical properties of the composite material.

Description

technical field [0001] The invention belongs to the technical field of engineering plastics, and in particular relates to a nylon composite material containing secondary surface modified fillers and a preparation method thereof. Background technique [0002] Nylon has excellent comprehensive properties, but its low thermal conductivity and low heat distortion temperature limit the use of nylon materials to a large extent. However, in applications such as automobiles and electronic products, higher requirements are often placed on the heat resistance and thermal conductivity of nylon materials. [0003] At present, scholars have made nylon composite materials by adding additives to nylon in order to improve the heat resistance and thermal conductivity of nylon materials, but at the same time, problems such as higher processing temperature, poor fluidity, and poor insulation have also occurred. Although composite materials made of PA, PPO, and PP have the characteristics of h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/02C08L77/06C08K13/06C08K9/06C08K9/04C08K3/36C08K3/38C08K3/34C09K5/14
CPCC08K2003/385C08L77/02C08L2201/08C08L2205/02C09K5/14C08L77/06C08K13/06C08K9/06C08K9/04C08K3/36C08K3/38C08K3/34
Inventor 徐卫兵徐鹏张建英周正发马海红任凤梅
Owner HEFEI UNIV OF TECH
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