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Synthesis method of PBO/carbon nanometer pipe composite material

A technology of benzobisoxazole and carbon nanotubes, which is applied in the field of synthesis of polymer-based/inorganic nanocomposites, and can solve problems such as cumbersome, time-consuming, and molecular weight reduction

Inactive Publication Date: 2005-11-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the re-dissolution process of PBO will cause the molecular weight to decrease, and it is time-consuming and tedious; on the other hand, if the material has excellent performance, the liquid crystal properties of PBO must be used. The liquid crystal solution of high molecular weight PBO has a high viscosity, and carbon nanotubes are blended with it. High-efficiency stirring is required, even with high-efficiency stirring, it is difficult to disperse carbon nanotubes well

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0004] Specific embodiment one: In this embodiment, 9.149g85% phosphoric acid and 5.848gP 2 o 5 Be made into the polyphosphoric acid solution that concentration is 77%, add 4.261g (0.020mol) 4,6-diaminoresorcinol hydrochloride when cooling to 90 ℃, 3.323g (0.020mol) terephthalic acid, in At this temperature, hydrogen chloride is removed in vacuum until the liquid level is calm, then 0.468g of dispersed carbon nanotubes are added, the temperature is raised to 100°C and kept for 6 hours, then cooled to room temperature, and P 2 o 5 6.329g, kept at 80°C for 2 hours, cooled to room temperature and added P 2 o 5 6.00g, program temperature rise below 210°C, stirring opalescence occurs during the heating process, keep at 200°C for 4 hours, stop heating, cool down to 100°C, press the film to solidify in distilled water, wash with a large amount of water until neutral. A 0.05g / dl solution was formulated with methanesulfonic acid as a solvent, and the intrinsic viscosity was determi...

specific Embodiment approach 2

[0005] Specific embodiment two: this embodiment adds 39.40g85% phosphoric acid and 50.63g P 2 o 5 Be made into the polyphosphoric acid solution that concentration is 83%, add 8.521g (0.040mol) 4,6-diaminoresorcinol hydrochloride when cooling to 90 ℃, 6.896 (0.042mol) terephthalic acid, keep this The temperature is 4 hours, the temperature is raised to 120°C and kept for 24 hours, then the temperature is lowered to 90°C, and P 2 o 5 14.55g, keep it for 2 hours, heat up to 160°C, add 0.187 disperse carbon nanotubes, keep the temperature for 6 hours, then raise the temperature below 210°C, when the temperature rises to 180°C, stirring opalescence appears, and keep at 200°C After 4 hours, stop heating, lower the temperature to 100°C, solidify the pressed film in distilled water, and wash with a large amount of water until neutral. A 0.05 g / dl solution was formulated with methanesulfonic acid as a solvent, and the intrinsic viscosity was determined to be 14 dl / g at 30°C by singl...

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Abstract

A process for synthesizing PBO / carbon nanotube composition includes such steps as proportional adding 4,6-diamino resorcinol hydrochloride and terephthalic acid derivative to polyphosphoric acid while stirring in inertial gas, removing hydrogen chloride, adding P2O5 several times, and raising temp under 210 deg.C while adding dispersed carbon nanotubes. Its advantage is high tension strength and tension modulus.

Description

Technical field: [0001] The invention relates to a synthesis process of a polymer base / inorganic nanocomposite material. Background technique: [0002] PBO (p-phenylenebenzobisoxazole) polymers have the most advantages in terms of fiber properties and raw material costs. It is used in aerospace composites for its excellent mechanical properties, thermal properties, flame retardancy, and solvent resistance. In materials and some high-performance civil applications; carbon nanotubes have extremely high aspect ratio and super mechanical properties. In order to make full use of the excellent mechanical, electrical and thermal properties of carbon nanotubes, carbon nanotubes are used to enhance or Improving the properties of polymers or other matrix materials and synthesizing them into polymer matrix / carbon nanotube composites is a topic that many people are studying. There are usually two methods for the synthesis of polymer-based / carbon nanotube (CNTs) composites: one is in-si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/00C08K3/04C08L79/00
Inventor 黄玉东李金焕张玉军曹海琳
Owner HARBIN INST OF TECH