Preparation method of carbon nano material-modified polymer

A technology of carbon nanomaterials and thermoplastic polymers, which is applied in the direction of single-component synthetic polymer rayon, rayon manufacturing, conductive/antistatic filament manufacturing, etc. It is easy to operate, improve physical and mechanical properties or electrical conductivity or thermal conductivity, and is suitable for large-scale production.

Inactive Publication Date: 2017-09-26
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The process of preparing the polymer / carbon nanomaterial mixture in the prior art is cumbersome, the mixing effect is not good, or the use and removal of organic solvents are involved, which makes the preparation process not environmentally friendly and is greatly limited in practical applications

Method used

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  • Preparation method of carbon nano material-modified polymer
  • Preparation method of carbon nano material-modified polymer
  • Preparation method of carbon nano material-modified polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Using a planetary ball mill, use a quartz ball with a diameter of 10mm as the large ball, and a quartz ball with a diameter of 6mm as the small ball. The mass ratio of the large ball to the small ball is 2:3. These two sizes of balls are used as grinding balls ;

[0029] Add polyamide 6 and carboxylated carbon nanotubes (12 layers of walls, length 3 μm, 1% of the surface carbon atoms are carboxylated) into a planetary ball mill with a material-to-ball ratio of 1:2; ball mill for 3 hours at 100 rpm to obtain Raw materials, wherein the quality of carboxylated carbon nanotubes is 0.1% of the quality of polyamide 6;

[0030] 2) Melting and extruding the above raw materials with a single-screw extruder at 270°C, and winding the extruded product to obtain primary fibers;

[0031] 3) Secondary drafting of the above-mentioned as-spun fibers, the conditions are: thermal drafting 3 times, heat setting on a hot roller at 130° C. for 2 min to obtain carboxylated carbon nanotube...

Embodiment 2

[0039] 1) Using a roller ball mill, a zirconia ball with a diameter of 20 mm is used as a large ball, and a zirconia ball with a diameter of 5 mm is used as a small ball, and the mass ratio of the large ball to the small ball is 1:10. The ball is used as a grinding ball;

[0040] Add polyamide 66 and multi-walled carbon nanotubes (15 layers of walls, length 5 μm) into a roller ball mill with a material-to-ball ratio of 1:4; ball mill for 8 hours at 50 rpm to obtain raw materials, wherein the multi-walled carbon nanotubes The mass accounts for 0.8% of the mass of polyamide 66;

[0041] 2) Melting and extruding the above raw materials with a twin-screw extruder at 300°C, and winding the extruded product to obtain primary fibers;

[0042] 3) Perform secondary drafting on the above-mentioned as-spun fibers, the conditions are: hot drafting 3 times, heat setting on a hot roller at 130° C. for 2 min to obtain multi-walled carbon nanotube-reinforced polyamide 66 fibers.

[0043] Co...

Embodiment 3

[0045] 1) Using a drum-type ball mill, the alumina ball with a diameter of 14mm is used as the large ball, and the alumina ball with a diameter of 6mm is used as the small ball. The mass ratio of the large ball to the small ball is 1:6. The balls of these two sizes are used as grinding ball;

[0046] Add polyethylene terephthalate and graphene (1 to 5 layers, sheet diameter 3 μm) into a roller ball mill with a material-to-ball ratio of 1:4; ball mill for 5 hours at 300 rpm to obtain raw materials, in which graphene The mass accounts for 12% of the mass of polyethylene terephthalate;

[0047] 2) Melt and extrude the above raw materials at 300°C with a twin-screw extruder, heat-set on a hot roller at 130°C for 2 minutes after stretching 3.5 times hot to obtain polyethylene terephthalate / graphene conductive fiber.

[0048] The electrical conductivity of the polyethylene terephthalate / graphene conductive fiber is 2.3×10 2 S / cm, thermal conductivity is 0.42W / (m·K).

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Abstract

The invention provides a preparation method of a carbon nano material-modified polymer. The preparation method comprises the following steps: 1) adding a thermoplastic polymer and a carbon nano material into a ball mill, wherein the ratio of the material to balls is 1:(2-5); ball-milling for 1-8 hours under the condition of 50-300 rpm to obtain a raw material, wherein the mass percentage of the carbon nano material is 0.05-15 percent of that of the polymer, grinding bodies in the ball mill are grinding balls with different sizes made of two kinds of same materials, and the mass ratio of the big balls to the small balls is 1:(1-6); 2) performing melt extrusion on the raw material by utilizing a single screw extruder or a double-screw extruder and curing to obtain a fibrous carbon nano material-modified polymer; or hot-pressing the raw material by utilizing a hot press to obtain the flaky carbon nano material-modified polymer. According to the preparation method provided by the invention, the dispersing properties of a carbon nano tube and grapheme in a polymer matrix layer in the melt spinning process are improved, and the physical and mechanical properties or the electrical conductivity or the thermal conductivity of a polymer composite material are effectively improved.

Description

technical field [0001] The invention belongs to the field of high-performance polymer material preparation, and in particular relates to a preparation method of a carbon nanomaterial modified polymer. Background technique [0002] Carbon nanotubes and graphene are two emerging nanomaterials with excellent physical, mechanical, electrical and thermal properties. 10 5 S / cm, thermal conductivity 5300W / (m.K), the application in composite materials has attracted widespread attention. The large specific surface area and high surface energy of carbon nanotubes and graphene make it difficult to uniformly disperse in the polymer matrix, which greatly limits their practical applications. How to uniformly disperse carbon nanotubes and (or) graphene and enhance the interfacial bonding ability between them and the polymer matrix is ​​an urgent problem to be solved at present. At present, there are three main methods to realize the mixing of these two carbon nanomaterials with polymers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K7/24C08K7/18C08K3/04D01F6/90D01F1/10D01F6/92D01F1/09D01F6/94
CPCC08K3/04C08K7/18C08K7/24C08K2201/003C08K2201/004C08K2201/011D01F1/09D01F1/10D01F6/90D01F6/92D01F6/94C08L23/12
Inventor 张兴祥陈甜陈赛靳艳梅刘海辉
Owner TIANJIN POLYTECHNIC UNIV
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