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Multifunctional composite material and preparation method thereof

A functional composite material and a composite material technology, which are applied in the field of thermally conductive and/or conductive functional composite materials and their preparation, can solve the problems of reducing the modification effect of functional fillers, and no regulation of the distribution state of fillers, so as to reduce the content and save costs. Effect

Pending Publication Date: 2018-05-18
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using materials with excellent thermal conductivity and electrical conductivity as functional fillers to modify the resin matrix is ​​currently the mainstream method for preparing thermally conductive composite materials and electromagnetic shielding composite materials, but most of these composite materials are currently limited to simple filling and mixing. The distribution state of fillers in the matrix is ​​not regulated, which greatly reduces the modification effect of functional fillers

Method used

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  • Multifunctional composite material and preparation method thereof
  • Multifunctional composite material and preparation method thereof
  • Multifunctional composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 50 parts of polypropylene and 50 parts of carbon fiber (surface-treated with silane coupling agent γ-methacryloxypropyltrimethoxysilane accounting for 2wt% of carbon fiber mass) were mixed uniformly in a high-speed mixer, and then added to the twin-screw Plasticize and mix in the extruder, and then prepare a thermally and electrically conductive composite parison of a certain thickness through an extrusion casting head. The twin-screw extrusion temperature is 180°C-220°C, and the screw speed is 200rpm. Biaxially stretch the parison at 170°C with a stretching rate of 5mm / min, then cool and shape it, the orientation state structure is as attached figure 2 Its performance is shown in Table 1.

Embodiment 2

[0046] 50 parts of polylactic acid, 10 parts of acetyl tributyl citrate and 40 parts of graphite nanosheets (surface-treated with silane coupling agent γ-aminopropyltriethoxysilane accounting for 8wt% of the mass of graphite nanosheets) were mixed at high speed Mix evenly in the machine, then add it to the twin-screw extruder for plasticization and mixing, and then prepare a thermally conductive composite material parison with a certain thickness through the extrusion casting head. The twin-screw extrusion temperature is 170-195°C, and the screw speed is 300rpm. The parison was uniaxially stretched at 160°C with a stretching rate of 10mm / min, and then cooled and shaped. The orientation state structure is shown in the attached image 3 Its performance is shown in Table 1.

Embodiment 3

[0048] 50 parts of polyethylene terephthalate, 45 parts of nickel-plated carbon nanotubes (accounting for the silane coupling agent γ-(2,3-epoxypropoxy)propane of 5.5wt% of the mass of nickel-plated carbon nanotubes base trimethoxysilane surface treatment), 10 parts of boron nitride fiber (surface treated with silane coupling agent γ-(2,3-epoxypropoxy)propyltrimethoxysilane accounting for 2wt% of the mass of boron nitride fiber ) mixed evenly in a high-speed mixer, then added to a twin-screw extruder for plasticization and mixing, and then prepared a certain thickness of heat-conducting and electrically-conductive composite material parison through extrusion casting head, the twin-screw extrusion temperature is 250 ~ 270 ° C , the screw speed is 240rpm. The parison was biaxially stretched at 250°C with a stretching rate of 10mm / min, and then cooled and shaped. The properties are shown in Table 1.

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PUM

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Abstract

The invention discloses a multifunctional composite material and a preparation method thereof. The composite material is prepared from the following components: 30 to 70 mass parts of thermoplastic resin, 30 to 70 mass parts of heat-conducting or / and electricity-conducting filler, 0 to 20 mass parts of a processing auxiliary agent; the multifunctional composite material is prepared by preparing aparison through an extruding casting or solution casting method, and then performing unidirectional drawing or bidirectional drawing; the multifunctional composite material is characterized in that the filler with an asymmetrical structure forms an orientation structure in a resin matrix, so that different heat conductivity or / and electricity conductivity in different directions of the composite material are ensured. The heat-conducting or / and electricity-conducting functional composite material disclosed by the invention has high heat conductivity or / and electricity conductivity, and can be used in other application fields of electronic and electric products, heat management and the like with a directional requirement on the heat conductivity or / and the electricity conductivity.

Description

technical field [0001] The invention belongs to the technical field of polymer functional composite materials, and in particular relates to a thermally conductive and / or electrically conductive functional composite material and a preparation method thereof. Background technique [0002] With the advancement of industrial technology, various electronic and electrical products are used in large quantities, and they also show many disadvantages while bringing convenience to people. On the one hand, the electromagnetic interference and electromagnetic pollution caused by the escape of electromagnetic signals are increasing day by day, which has become a serious problem that plagues modern social life; This current situation puts forward new requirements for thermally and electrically conductive materials. Using materials with excellent thermal conductivity and electrical conductivity as functional fillers to modify the resin matrix is ​​currently the mainstream method for prepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K9/06C08K7/06C08L67/04C08K5/11C08K3/04C08L67/02C08K13/06C08K9/02C08K7/04C08L29/04C08K7/24C08L27/16C08K3/38C08K7/08
CPCC08K3/04C08K3/38C08K5/11C08K7/04C08K7/06C08K7/08C08K7/24C08K9/02C08K9/06C08K13/06C08K2201/001C08K2003/385C08K2201/011
Inventor 温变英赫达
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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