Anisotropic heat-conducting nylon 6/graphene nanocomposite material and preparation method thereof

A nano-composite material and anisotropic technology, applied in the field of composite materials, can solve the problems of poor compatibility between graphene and silicone rubber, and achieve the effect of improving thermal conductivity

Inactive Publication Date: 2017-11-07
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Research on anisotropic thermally conductive materials at home and abroad, in the existing technology, the Chinese patent publication number CN103740110A, the publication date is 2014.04.23, the title of the invention is "a kind of directional flexible thermally conductive material and its molding process and application", the invention Disclosed is an oriented flexible thermally conductive material, the main components of which are silicone rubber and anisotropic thermally conductive fillers. The thermally conductive material has good thermal conductivity in a specific direction, but due to poor compatibility between graphene and silicone rubber, graphene Easy to form irreversible agglomerates in silicone rubber products

Method used

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  • Anisotropic heat-conducting nylon 6/graphene nanocomposite material and preparation method thereof

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Embodiment 1

[0023] Embodiment 1: the preparation method of a kind of anisotropic thermally conductive nylon 6 / graphene nanocomposite material of the present embodiment, comprises the following steps:

[0024] 1. Preparation of nylon 6 / graphene masterbatch: Add graphene and nylon 6 into the torque rheometer according to the formula with graphene mass fraction of 10%, at a temperature of 210-230°C at a speed of 40-45rpm Melting and blending for 5-10 minutes; then extruding through a parallel twin-screw extrusion device, and shearing with a shearing machine to obtain a masterbatch of nylon 6 / graphene.

[0025] 2. Preparation of nylon 6 / graphene nanocomposite material: get 1 part of nylon 6 / graphene masterbatch prepared by step (1), mix it with 99 parts by weight of nylon 6 and add it to the torque rheometer, and at 210-230 Melting and blending at a temperature of 40-45 rpm for 5-10 min at a temperature of °C to prepare a nylon 6 / graphene composite material with a mass content of 0.1 wt%.

...

Embodiment 2

[0029] A kind of preparation method of the nylon 6 / graphene nano-composite material of anisotropic heat conduction of the present embodiment, comprises the following steps:

[0030] 1. To prepare nylon 6 / graphene masterbatch, add graphene and nylon 6 to the torque rheometer according to the formula with a graphene mass fraction of 10%, at a temperature of 210-230°C at a speed of 40-45rpm Melting and blending for 5-10 minutes; then extruding through a parallel twin-screw extrusion device, and shearing with a shearing machine to obtain a masterbatch of nylon 6 / graphene.

[0031] 2. Preparation of nylon 6 / graphene nanocomposite material: get 5 parts of nylon 6 / graphene masterbatches prepared by step (1), mix with nylon 6 of 95 parts by weight and add in the torque rheometer, at 210-230 Melting and blending at a temperature of 40-45 rpm for 5-10 minutes at a temperature of °C to prepare a nylon 6 / graphene composite material with a mass content of 0.5 wt%.

[0032] 3. Put the drie...

Embodiment 3

[0034] Embodiment three: the preparation method of a kind of anisotropic thermally conductive nylon 6 / graphene nanocomposite material of the present embodiment, comprises the following steps:

[0035] 1. Preparation of nylon 6 / graphene masterbatch: Add graphene and nylon 6 into the torque rheometer according to the formula with graphene mass fraction of 10%, at a temperature of 210-230°C at a speed of 40-45rpm Melting and blending for 5-10 minutes; then extruding through a parallel twin-screw extrusion device, and shearing with a shearing machine to obtain a masterbatch of nylon 6 / graphene.

[0036] 2. prepare nylon 6 / graphene nanocomposite material: get the nylon 6 / graphene masterbatch that 10 parts of steps (1) prepare, mix and add in the torque rheometer with the nylon 6 of 90 parts by weight fractions, at 210-230 Melting and blending at a temperature of 40-45 rpm for 5-10 min at a temperature of °C to prepare a nylon 6 / graphene composite material with a mass content of 1 w...

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Abstract

The invention discloses an anisotropic heat-conducting nylon 6/graphene nanocomposite material and a preparation method thereof. The anisotropic heat-conducting nylon 6/graphene nanocomposite material comprises 97-99.9% of nylon 6 and 0.1-3% of graphene by mass. The preparation method comprises the following steps: (1) according to a proportion that the addition amount of the graphene is 10%, adding the nylon 6 and the graphene into a torque rheometer, performing melt mixing while heating, granulating, and drying to obtain nylon 6/graphene masterbatch; and (2) mixing the nylon 6/graphene masterbatch and the nylon 6 according to a proportion that the mass fraction of the graphene is 0.1-3%, adding into the torque rheometer, performing melt blending, and discharging to obtain the nylon 6/graphene nanocomposite material. Aggregation between graphene sheets in the anisotropic heat-conducting nylon 6/graphene nanocomposite material is avoided; the in-plane heat conductivity coefficient of the anisotropic heat-conducting nylon 6/graphene nanocomposite material is greater than or equal to 3W.m<-1>.K<-1>, the vertical heat conductivity coefficient thereof is smaller than or equal to 0.6W.m<-1>.K<-1>, and the anisotropy ratio of the heat conductivity coefficient is greater than or equal to 5.

Description

technical field [0001] The invention relates to a composite material, in particular to a nylon 6 / graphene nanocomposite material with anisotropic heat conduction that can realize directional heat transfer in a certain direction. Background technique [0002] Graphene is a new type of two-dimensional carbon nanomaterial with high specific surface area, excellent mechanical properties and thermal conductivity. Theoretical studies have shown that the room temperature thermal conductivity of single-layer graphene is as high as 3000-5000W m -1 ·K -1 , is currently known to have the highest thermal conductivity of the material, is a very ideal thermal conductivity filler. [0003] Nylon 6 is a kind of thermoplastic engineering plastic with good performance. It has excellent processing performance, excellent mechanical performance, and wear resistance, oil resistance, solvent resistance and corrosion resistance. It is often used in electronic devices, aerospace and other industri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08K3/04C09K5/14
CPCC08K2201/005C08K2201/011C08L77/02C08L2205/025C09K5/14C08K3/04
Inventor 宋娜施利毅丁鹏侯兴双潘海东
Owner SHANGHAI UNIV
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