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High dielectric composite material for filling organic metal modified carbon tube and preparation method thereof

A composite material and organometallic technology, which is applied in the field of electroactive nanocomposite material preparation, can solve the problems of difficult and uniform dispersion of fillers, increase in dielectric constant, and increase in MWNT content, and achieve the effect of improving interfacial interaction.

Inactive Publication Date: 2011-01-26
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the past few years, people have devoted themselves to the study of single-walled carbon nanotube (SWNT) polymer-based composite materials. Although the dielectric constant of the composite material can be increased by filling a low content of SWNT (<10wt%), the cost is high.
Filling multi-walled carbon nanotubes (MWNT) can greatly reduce the cost, but due to the increase in the required MWNT content, it is difficult for the filler to disperse uniformly in the matrix, which affects the performance of the composite material.

Method used

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  • High dielectric composite material for filling organic metal modified carbon tube and preparation method thereof
  • High dielectric composite material for filling organic metal modified carbon tube and preparation method thereof
  • High dielectric composite material for filling organic metal modified carbon tube and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] 1) Ultrasonic disperse 0.034g MWNT-TFP in 30mL DMF for 2h; heat and dissolve 0.505g PVDF in 10ml DMF; mix the two solutions, continue ultrasonication for 10min, and dry in a common oven at 120°C for 1hr; Dry in a vacuum oven at 80°C for 200 minutes to obtain a composite material film;

[0023] 2) Put the composite material film on a tablet press, and heat press it for 202 minutes at 200° C. and 15 MPa.

Embodiment 2

[0025] 1) Ultrasonic disperse 0.050g MWNT-TFP in 30mL DMF for 2h; heat and dissolve 0.488g PVDF in 10mlDMF; mix the two solutions, continue ultrasonication for 10min, and dry in a common oven at 120°C for 1hr; Dry in a vacuum oven at 80°C for 200 minutes to obtain a composite film;

[0026] 2) Put the composite material film on a tablet press, and heat press it for 20 minutes under the condition of 200 and 15 MPa.

Embodiment 3

[0028] 1) Ultrasonic disperse 0.067g MWNT-TFP in 30mL DMF for 2h; heat and dissolve 0.472g PVDF in 10ml DMF; mix the two solutions, continue ultrasonication for 10min, and dry in a common oven at 120°C for 1hr; Then dry in a vacuum oven at 80° C. for 200 minutes to obtain a composite material film.

[0029] 2) Put the composite film on a tablet press, and heat press it for 20 minutes at 200° C. and 15 MPa.

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Abstract

The invention relates to a high dielectric composite material for filling an organic metal modified carbon tube, belonging to the technical field of electroactive nano composite material preparation. The composite material comprises MWNT-TFP (Multi-Walled Carbon Nanotube-Tetrafluoropropanol) with the outer diameter of 10-30 nm and the length of 1-5 mum and PVDF (Polyvinylidene Fluoride) with the particle size of 0.1-0.2 mum, wherein the volume ratio of MWNT-TFP is 6-16%, and the ratio of PVDF is 84-94%. A preparation method comprises the following steps of: respectively dissolving MWNT-TFP and PVDF in DMF (Dimethyl Formamide), mixing the two solutions together, ultrasonically dispersing, drying, and hot-forming to obtain the composite material. The prepared composite material has the advantages of high dielectric constant, low composite temperature, simple preparation process, low cost and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of electroactive nanometer composite materials, in particular to a flexible high dielectric constant composite material with high dielectric constant, low composite temperature, simple preparation process and wide application and a preparation method thereof. Background technique [0002] The flexible polymer-based composite material with high dielectric constant has obvious electrical activity, that is, under the action of a certain external electric field, the composite material can produce obvious deformation, and it is an ideal new material suitable for artificial muscle stimulators. . The biggest advantage of this new type of material is: compared with pure polymers, it has a high dielectric constant, and through the mutual conversion of electric field energy and elastic energy of the material, it can achieve greater deformation at a lower electric field, while pure polymers The same def...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08K9/04C08K3/04C08J5/18
Inventor 党智敏王岚
Owner BEIJING UNIV OF CHEM TECH
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