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Nanometer stripping composite material and preparation method and application thereof

A kind of composite material and nanotechnology, which is applied in the field of preparation and nano-stripping composite materials, can solve the problems of poor dispersion of layered nano-sheets, and achieve the effects of mass industrialization, environmental pollution, and improved peeling degree

Inactive Publication Date: 2019-06-21
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a nano-exfoliation composite material, a preparation method and its application, which solves the technical problem that the existing exfoliation method leads to poor dispersion of layered nanosheets in polymers

Method used

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  • Nanometer stripping composite material and preparation method and application thereof
  • Nanometer stripping composite material and preparation method and application thereof
  • Nanometer stripping composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Evenly drop 4.7ml of A151 silane coupling agent into 140g of graphene microchips, stir evenly, then mix it with 1860g of polypropylene (PP) and add 20g of lubricant in a high-speed mixer at 70°C Down mixing 5min, obtains reaction mixture;

[0043] (2) The reaction mixture obtained in step (1) is accurately fed into an extruder with a screw diameter of 35mm and a length-to-diameter ratio of 40:1 with a feeding device for high shear and high residence time (shear stress is 0.16MPa~ 0.2MPa, the residence time is 400s ~ 600s), the screw speed is 200rpm, the temperature of each zone is between 160°C ~ 210°C, and finally through the shearing first, then the bidirectional tensile force field and then the chaotic mixing force field Extrude the machine head to complete the peeling of the graphene micro flakes; the obtained sheet is the graphene micro flakes / PP composite material.

[0044] The scanning electron microscope figure of the graphene microchip / PP composite materia...

Embodiment 2

[0047] (1) Evenly drop 4.7ml of KH560 silane coupling agent into 140g graphene microchips, stir evenly, then mix it with 1860g acrylonitrile-butadiene-styrene copolymer (ABS) and add 20g The lubricant was mixed in a high-speed mixer at 80°C for 10 minutes to obtain a reaction mixture;

[0048] (2) The reaction mixture obtained in step (1) is accurately fed into a twin-screw extruder with a screw diameter of 35 mm and a length-to-diameter ratio of 40:1 with a feeding device for high shear and high residence time (shear stress is 0.16 MPa~0.2MPa, the residence time is 400s~600s) melt blending, the screw speed is 100rpm, the temperature of each zone is between 170℃~220℃, and finally through the shearing first, then the bidirectional tensile force field and then the chaotic mixing force Extrude on the machine head of the field to complete the peeling of the graphene micro-sheets; the obtained sheet is the graphene micro-sheet / ABS composite material.

[0049] Adopt the test method...

Embodiment 3

[0051] (1) Evenly drop 4.7ml of titanate coupling agent into 140g of graphene microchips, stir evenly, then mix it with 1860g of polypropylene (PP), add 20g of lubricant and mix in a high-speed mixer at 70°C 10min, obtain reaction mixture;

[0052] (2) The reaction mixture obtained in step (1) is accurately sent into a twin-screw extruder with a screw diameter of 35mm and a length-diameter ratio of 40:1 with a feeding device for high shear and high residence time (shear stress is 0.14MPa~0.16MPa, the residence time is 250s~450s), the screw speed is 300rpm, the temperature of each zone is between 150℃~200℃, and finally extruded by the head with the first shear and then the bidirectional tensile force field. Complete the stripping of the graphene microflakes; the obtained sheet is the graphene microflake / PP composite material.

[0053] Adopt the test method that embodiment 1 provides to test the graphene microchip / PP composite material that embodiment 3 obtains, the result show...

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Abstract

The invention belongs to the technical field of nanometer composite materials, and particularly relates to a nanometer stripping composite material and a preparation method and application thereof. The preparation method of the nanometer stripping composite material, provided by the invention, comprises the following steps: 1, mixing a polymer, layered nanosheets and a coupling agent to obtain a reaction mixture; 2, performing melt blending on the reaction mixture obtained in the step 1, and then extruding to obtain the nanometer stripping composite material, wherein extrusion is performed ina shear force field firstly, then in a tensile force field and finally in a chaotic mixing force field. The invention provides the nanometer stripping composite material and the preparation method andthe application thereof, and solves the technical problem that by the existing stripping method, the dispersing effect of the layered nanosheets in the polymer is poor.

Description

technical field [0001] The invention belongs to the technical field of nano-composite materials, and in particular relates to a nano-stripping composite material, a preparation method and an application thereof. Background technique [0002] Two-dimensional layered materials such as graphene microflakes, molybdenum disulfide, montmorillonite, and boron nitride have attracted extensive attention and research because of their excellent electronic, thermal, optical, and mechanical properties. Provides a new direction for development. Adding layered nanosheets as reinforcing materials to polymers can greatly improve the electrical and thermal conductivity of polymer-based composites, and has broad application prospects in the fields of conductive materials, thermal conductive materials, shielding materials, and electronic packaging. [0003] However, due to the large specific surface area and surface free energy of layered nanosheets, there are strong electrostatic forces and v...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L55/02C08K9/06C08K9/04C08K3/04
Inventor 张婧婧徐子威
Owner GUANGDONG UNIV OF TECH
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