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Self-lubricating nano composite material and its preparation method

A nano-composite material and self-lubricating technology, applied in the field of nano-composite materials and their preparation, can solve the problems that have not been seen in literature and patent reports, and achieve the effect of improving friction and wear performance and good heat resistance.

Inactive Publication Date: 2003-04-30
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a high temperature resistant self-lubricating material, this kind of nanocomposite material has not been reported in literature and patents considering its tribological properties from the perspective of structural composition.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 0.1 g of coupling agent and solvent N-methylpyrrolidone to 10 g of polyamic acid, 0.5 g of nano-nano silicon nitride, 0.2 g of nano-silicon dioxide, and 0.1 g of carbon nanotubes. In the polyamic acid system, blow nitrogen, dry, and mechanically stir for 7 hours, add 1.2 g of carbon fibers, and then fully stir for 3 hours. Precipitate the composite material quickly by heating method, treat it in a vacuum oven at 245°C for 3 hours, put the dried composite material into the mold, pressurize to 15Mpa, and then raise the temperature to 340°C at a rate of 6°C / min. Keep the temperature constant for 25 minutes, pressurize to 40Mpa, cool under the condition of maintaining pressure, and demould.

Embodiment 2

[0028] Add 0.2g of coupling agent and solvent N-methylpyrrolidone to 9g of polyamic acid, 0.6g of nano-nano-silicon nitride, 0.2g of nano-silicon dioxide, and 0.2g of carbon nanotubes. After ultrasonic treatment for 20 minutes to disperse evenly, add In the polyamic acid system, blow nitrogen, dry, and mechanically stir for 8.5 hours, add 2 g of carbon fibers, and then fully stir for 4 hours. Precipitate the composite material quickly with pyridine and acetic anhydride, treat it in a vacuum oven at 240°C for 4 hours, put the dried composite material into a mold, pressurize to 20Mpa, and then raise the temperature to 330°C at a rate of 6°C / min ℃, keep the temperature for 40 minutes, pressurize to 50Mpa, cool under the pressure keeping condition, and release the mold.

Embodiment 3

[0030] Add 0.15g of coupling agent and solvent N-methylpyrrolidone to 17.6g of polyamic acid, 1g of nano-silicon nitride, and 0.6g of carbon nanotubes. After ultrasonic treatment for 18 minutes to disperse evenly, add to the polyamic acid system and blow nitrogen , dried, and mechanically stirred for 10 hours, then added 2.7 g of carbon fibers, and then fully stirred for 4 hours. Precipitate the composite material quickly with pyridine and acetic anhydride, treat it in a vacuum oven at 250°C for 3 hours, put the dried composite material into a mold, pressurize to 20Mpa, and then raise the temperature to 350°C at a rate of 6°C / min. ℃, keep the temperature for 20 minutes, pressurize to 60Mpa, cool under the pressure keeping condition, and release the mold.

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Abstract

A self-lubricating nanometer composition is prepared from fusable polyimide (100 wt. portions), nanometer inorganic material (1-25), coupler (0.1-2) and carbon fibre (5-30). The composition suitable for vacuum, radiation and high-temp. special environment.

Description

technical field [0001] The invention relates to a nanocomposite material and a preparation method thereof, in particular to a self-lubricating nanocomposite material and a preparation method thereof. Background technique [0002] Filler-reinforced polymer composites have been widely used in many industries and solved many major technical problems. However, due to its unique properties, nanomaterials have been researched and applied more in the field of metal and ceramic materials, while the development in the field of high molecular polymers is still in its infancy; the polymer-based nanocomposites reported at home and abroad are mainly based on The direct blending method of polymer solids and inorganic nanoparticles is more common, and it is difficult to achieve ideal uniform dispersion of nanoparticles in the polymer matrix, which affects the interfacial bonding between nanoparticles and the polymer matrix. For this reason, Chinese patent CN1258690A has reported the prepa...

Claims

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Application Information

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IPC IPC(8): C08K7/06C08L79/08
Inventor 阎逢元蔡辉刘维民薛群基
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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