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Graphite-like carbon nitride/polyimide composite material and preparation method thereof

A technology of graphite-type carbon nitride and polyimide, which is applied in the field of high-performance polymer composite materials and their preparation, polyimide composite materials and their preparation

Inactive Publication Date: 2014-09-03
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, it is very necessary to develop and provide a graphite-like carbon nitride / polyimide composite material with simple preparation process and excellent performance. The patent of the present invention combines the toughening agent and the prepared g-C 3 N 4 Adding to the polyimide matrix after powder surface treatment can significantly enhance the g-C 3 N 4 Combining with PI, the prepared material has excellent properties that ordinary composite materials do not have. It is a brand new high-tech new material with good commercial development and application prospects. g-C 3 N 4 It provides a new way for the reinforcement modification of polyimide, and there is no related technology public report

Method used

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  • Graphite-like carbon nitride/polyimide composite material and preparation method thereof
  • Graphite-like carbon nitride/polyimide composite material and preparation method thereof
  • Graphite-like carbon nitride/polyimide composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Weigh 3g of melamine, put it in a corundum crucible and cover it, raise the temperature to 550°C in a muffle furnace, and the heating rate is 3°C min -1 , and calcined at 550°C for 4 h, then naturally cooled to room temperature to obtain a yellow solid, which was ground to obtain g-C 3 N 4 , the XRD pattern of the prepared powder is shown in figure 1 .

[0033] Weigh the yellow g-C prepared above 3 N 4 Powder 1g, added volume is g-C3 N 4 Powder volume 5 times the absolute ethanol solution, then g-C 3 N 4 The mixture of powder and absolute ethanol was dispersed in an ultrasonic vibrator for 30 minutes, and g-C was added to the suspension during the ultrasonic vibration 3 N 4 Coupling agent γ-aminopropyltriethoxysilane with 2% powder mass, then place the mixed solution with coupling agent in an oven and dry for 20 hours at a temperature of 80°C, and dry the alcohol to obtain a dispersion And surface treated g-C 3 N 4 powder raw material.

[0034] The polyimide...

Embodiment 2

[0040] Weigh 2g of melamine, put it in a corundum crucible and cover it, raise the temperature to 550°C in a muffle furnace, and the heating rate is 3°C min -1 , and calcined at 550°C for 4 h, then naturally cooled to room temperature to obtain a yellow solid, which was ground to obtain g-C 3 N 4 , the XRD pattern of the prepared powder is shown in figure 1 .

[0041] Weigh the yellow g-C prepared above 3 N 4 Powder 0.5g, added volume is g-C 3 N 4 Powder volume 5 times the absolute ethanol solution, then g-C 3 N 4 The mixture of powder and absolute ethanol was placed in an ultrasonic vibrator to disperse for 40 minutes, and g-C was added to the suspension during the ultrasonic vibration 3 N 4 Coupling agent β-(3,4 epoxycyclohexyl)propyltrimethoxysilane with 2% powder mass, then place the mixed solution with coupling agent in an oven and dry for 10 hours, the drying temperature is 80°C, After drying the alcohol to obtain the g-C after dispersion and surface treatment ...

Embodiment 3

[0048] Weigh 2g of melamine, put it in a corundum crucible and cover it, raise the temperature to 550°C in a muffle furnace, and the heating rate is 3°C min -1 , and calcined at 550°C for 4 h, then naturally cooled to room temperature to obtain a yellow solid, which was ground to obtain g-C 3 N 4 , the XRD pattern of the prepared powder is shown in figure 1 .

[0049] Weigh the yellow g-C prepared above 3 N 4 Powder 0.5g, added volume is g-C 3 N 4 Powder volume 5 times the absolute ethanol solution, then g-C 3 N 4 The mixture of powder and absolute ethanol was placed in an ultrasonic vibrator to disperse for 40 minutes, and g-C was added to the suspension during the ultrasonic vibration 3 N 4 Coupling agent γ-(2,3-glycidoxy)propyltrimethoxysilane with 2% powder mass, and then place the mixed solution with coupling agent in an oven for 10 hours and dry at 80°C , dry the alcohol to obtain the dispersed and surface-treated g-C 3 N 4 powder raw material.

[0050] The ...

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Abstract

The invention discloses a graphite-like carbon nitride / polyimide composite material and a preparation method thereof. The composite material comprises a polymer matrix polyimide PI, a toughening agent, a surface-modifier-treated filler graphite-like carbon nitride g-C3N4 and a surface modifier. The preparation method of the composite material comprises the following steps: preparation of graphite-like carbon nitride, filler surface treatment, high-speed stirring and mixing of raw material powder in a stirrer, hot pressing and hardening treatment. The preparation method has the advantages of simple technique and low cost, is convenient to operate, and can easily implement industrialization; and the prepared composite material has excellent mechanical properties and tribological properties, has potential application values in the aspects of structural materials, friction materials, heat-resistant materials and the like, and can be widely used in the technical fields of automobiles, electricity and electronics, aviation and the like.

Description

technical field [0001] The invention relates to a high-performance polymer composite material and a preparation method thereof, in particular to a polyimide composite material filled with graphite-like carbon nitride and a preparation method thereof, belonging to the technical field of polymer composite materials. Background technique [0002] Polyimide (PI) is a class of organic polymers containing imide groups in the main chain, which has outstanding thermal stability, good mechanical properties, dimensional and oxidation stability, chemical resistance and radiation resistance performance, can be widely used in aerospace, electrical and electronics, locomotives, automobiles, precision machinery, food industry, medical equipment and automatic office machinery and other fields; in addition, it has excellent friction and wear properties in harsh environments such as high temperature, high and low pressure and high speed , is a kind of matrix material with great potential to b...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08L27/18C08L27/16C08K9/06C08K9/04C08K3/28B29C43/58
CPCB29C43/58C08K3/28C08K9/06C08L79/08C08L2201/08C08L27/18C08L27/16C08K9/04
Inventor 朱琳胡超伟邵剑沈湘黔
Owner JIANGSU UNIV
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