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Preparation method of carbon nanotube/thermosetting resin composite material

A technology of resin composite materials and carbon nanotubes, which is applied in the field of preparation of organic polymer compounds, can solve the problems of dielectric loss, waste of energy, high dielectric constant, and high dielectric loss, so as to reduce the probability of conductive paths and increase the generation of probability, the effect of low dielectric loss

Inactive Publication Date: 2012-10-03
SUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, similar to other conductor / polymer composites, carbon nanotube / thermoset resin composites generally suffer from high dielectric loss
High dielectric loss not only wastes a lot of energy, but also shortens the service life of equipment
[0004] Before the present invention was made, the literature reported a technical scheme for preparing carbon nanotubes (CNTs) in a gradient distribution of cyanate resin composites using natural sedimentation (see literature: Hongyi Wu, Guozheng Liang, Aijuan Gu, Li Yuan . J. Mater. Chem. 2011, 21, 14838-14848), the composite material provided has both high dielectric constant and low dielectric loss. However, its preparation process is difficult to control, especially in large-scale applications. bigger challenge

Method used

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  • Preparation method of carbon nanotube/thermosetting resin composite material
  • Preparation method of carbon nanotube/thermosetting resin composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 0.02 g of multi-walled carbon nanotubes and 20 g of bisphenol A cyanate were mixed, ultrasonically oscillated and stirred at 85° C. for 1 hour to obtain a mixed solution, and then the mixed solution was prepolymerized at 150° C. for 2 hours. After the prepolymerization was finished, the prepolymer was divided into 2 equal parts. Pour one part of it into a preheated mold, and vacuum defoam at 140°C for 30 minutes. Then put the mold into an oven, pre-cure at 180° C. for 30 minutes, and obtain a carbon nanotube / cyanate resin composite material pre-cured sheet after cooling.

[0024] Cast the remaining 1 part of prepolymer on the precured sheet, after vacuum defoaming at 140°C for 30min, perform curing and post-treatment according to the process 180°C / 2h+200°C / 2h+220°C / 2h and 240°C / 4h , to obtain carbon nanotube / cyanate resin composite material.

Embodiment 2

[0026] Mix 0.4 g of single-walled carbon nanotubes and 20 g of bisphenol A cyanate, and ultrasonically vibrate and stir at 85° C. for 1 hour to obtain a mixed solution, and then prepolymerize the mixed solution at 150° C. for 2 hours. After the prepolymerization, divide the prepolymer into 3 parts with a mass ratio of 2:1:1. Pour one part of it into a preheated mold, and vacuum defoam at 140°C for 30 minutes. Then put the mold into an oven, pre-cure at 180° C. for 30 minutes, and obtain a carbon nanotube / cyanate resin composite material pre-cured sheet A after cooling.

[0027] The second part of prepolymer was poured on the above-mentioned pre-cured sheet A, vacuum defoamed at 140°C for 30 minutes, and the carbon nanotube / cyanate resin composite material pre-cured sheet B was obtained after cooling.

[0028] Cast the third part of the prepolymer on the precured sheet B, and after vacuum degassing at 140°C for 30 minutes, cure and post-cure according to the process 180°C / 2h+2...

Embodiment 3

[0030] 0.14 g of single-walled carbon nanotubes and 20 g of bisphenol A cyanate were mixed, ultrasonically oscillated and stirred at 85° C. for 1 hour to obtain a mixed solution, and then the mixed solution was prepolymerized at 150° C. for 2 hours. After the prepolymerization, divide the prepolymer into 4 parts with a mass ratio of 2:1:2:1. Pour one part of it into a preheated mold, and vacuum defoam at 140°C for 30 minutes. Then put the mold into an oven, pre-cure at 180° C. for 30 minutes, and obtain a carbon nanotube / cyanate resin composite material pre-cured sheet A after cooling.

[0031] The second part of prepolymer was poured on the above-mentioned pre-cured sheet A, vacuum defoamed at 140°C for 30 minutes, and the carbon nanotube / cyanate resin composite material pre-cured sheet B was obtained after cooling.

[0032] The third part of prepolymer was poured on the pre-cured sheet B above, vacuum degassed at 140° C. for 30 minutes, and the carbon nanotube / cyanate resin...

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Abstract

The invention discloses a preparation method of a carbon nanotube / thermosetting resin composite material. The preparation method comprises the following steps of: uniformly mixing 100 parts by weight of thermosetting resin and 0.1-2 parts by weight of carbon nanotube to obtain prepolymer; dividing the prepolymer into a plurality of parts; taking one part of prepolymer, precuring at certain temperature and cooling to obtain a precured sheet; taking another part of prepolymer and pouring on the precured sheet, and then precuring; precuring the rest parts of prepolymer in steps in sequence to obtain a precured body; and curing and post-treating to obtain the carbon nanotube / thermosetting resin composite material. Compared with the carbon nanotube / thermosetting resin composite material prepared by one-time forming in the prior art, the composite material provided by the invention has the advantages of higher dielectric constant, lower dielectric loss angle tangent value, simple and practical preparation method, controllable process and suitability for large-scale production.

Description

technical field [0001] The invention relates to a method for preparing an organic polymer compound, in particular to a method for preparing a carbon nanotube / thermosetting resin composite material with dielectric function. Background technique [0002] Among all the passive components in the electronics industry, capacitors have received extensive attention due to their various functions such as decoupling, bypassing, filtering, and energy conversion. Electronic products with more functions and smaller volumes need to embed capacitors in the inner layer of printed circuit boards. In order to meet this requirement, polymer-based composite materials with high dielectric constant have good processability and compatibility with circuits. The good compatibility of the board can be applied. [0003] Conductor / polymer composites are the main form of preparing high dielectric constant materials. Among them, carbon nanotubes have high specific surface area, excellent electrical and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08L79/04C08L63/00C08K9/00C08K3/04
Inventor 顾嫒娟王炳昊梁国正陈磊赵斐鹏储阳袁莉
Owner SUZHOU UNIV
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