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High-performance monomer casting nylon/graphene nanometer composite material and in-situ polymerization preparation method of high-performance monomer casting nylon/graphene nanometer composite material

A nano-composite material and technology of composite material, applied in the field of monomer cast nylon/graphene nano-composite material and its preparation, can solve the problems of poor impact resistance and friction performance, easy agglomeration, strong van der Waals force, etc.

Active Publication Date: 2016-01-20
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN101928457A discloses a cast nylon / graphene composite material directly added with 0.1-5% graphene in situ polymerization, the mechanical properties of the prepared composite material are improved, but the impact resistance and friction performance are poor
The addition of graphene makes MC nylon have excellent mechanical, thermal, electrical and other comprehensive properties. However, in the above preparation methods, directly incorporating graphene into the matrix is ​​not conducive to the dispersion and compatibility of graphene in the MC nylon matrix. Or the graphene coupling modification method is relatively cumbersome
Graphene with a complete structure is composed of benzene rings, with high chemical stability, inert surface, and weak interaction with other media; and there is strong van der Waals force between graphene sheets, which is easy to agglomerate, which greatly limits its research and application; how to use efficient A simple and easy-to-implement method to achieve good dispersion of graphene in nylon matrix is ​​the key to the preparation of high-performance MC nylon / graphene nanocomposites

Method used

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  • High-performance monomer casting nylon/graphene nanometer composite material and in-situ polymerization preparation method of high-performance monomer casting nylon/graphene nanometer composite material
  • High-performance monomer casting nylon/graphene nanometer composite material and in-situ polymerization preparation method of high-performance monomer casting nylon/graphene nanometer composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Disperse 1g of graphene oxide in 1000g of ethanol / water mixture with a volume ratio of 1 / 1, add 3g of hydroxyl-terminated polyethylene oxide with a molecular weight of 400g / mol and stir evenly at room temperature. The wavelength is 200nm, the power is 600W, the ultrasonic power is 500w, the frequency is 20000HZ, and the ultrasonic temperature is 80°C; then add 2g of hydrazine hydrate, reduce it in an oil bath at 80°C for 10h, filter the product, wash with distilled water, and put it at 90°C Dry for 8h to constant weight.

[0021] Melt 100g of caprolactam completely at 105°C, add 1g of graphene oxide that has been coupled and reduced, and disperse for 20min under the action of ultrasound with a power of 600w and a frequency of 10000HZ; then raise the temperature to 130°C, and distill off the water under reduced pressure; Then add 0.20g of sodium hydroxide into the reaction kettle, carry out vacuum distillation to remove water again, raise the temperature to 140°C, remove...

Embodiment 2

[0023] Disperse 5g of graphene oxide in 10000g of ethanol / water mixture with a volume ratio of 1 / 1, add 10g of hydroxyl-terminated polyoxypropylene with a molecular weight of 2000g / mol and stir evenly at room temperature. The wavelength is 400nm, the power is 400W, the ultrasonic power is 1000w, the frequency is 40000HZ, and the ultrasonic temperature is 60°C; then add 10g of sodium borohydride, reduce it in an oil bath at 100°C for 6h, filter the product, wash with distilled water, and put it at 90°C ℃ dried for 8h to constant weight.

[0024] Melt 100g of caprolactam completely at 110°C, add 5g of graphene oxide that has been coupled and reduced, and disperse for 30min under the action of ultrasound with a power of 2000w and a frequency of 30,000HZ; then raise the temperature to 140°C, and distill under reduced pressure to remove water; Then add 0.50g of sodium methoxide into the reaction kettle, carry out vacuum distillation to remove water again, raise the temperature to 1...

Embodiment 3

[0026] Disperse 2g of graphene oxide in 4000g of ethanol / water mixture with a volume ratio of 1 / 1, add 2g of amino-terminated polyoxypropylene ether with a molecular weight of 10000g / mol and stir evenly at room temperature, and disperse for 200min with microwave and ultrasonic wave. The ultrasonic power is 200MHZ, the power is 1000W, the ultrasonic power is 800w, the frequency is 60000HZ, and the ultrasonic temperature is 50°C; then add 20g vitamin C, reduce it in an oil bath at 60°C for 4 hours, filter the product, wash with distilled water, and dry at 90°C for 8 hours to constant weight.

[0027]Melt 100g of caprolactam at 120°C completely, add 0.7g of graphene oxide that has been coupled and reduced, and disperse for 50min under the action of ultrasound with a power of 100w and a frequency of 50,000HZ; then raise the temperature to 150°C, and distill under reduced pressure to remove water ; Then add 1g of sodium caprolactam into the reaction kettle, carry out vacuum distill...

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Abstract

The invention discloses a high-performance monomer casting nylon / graphene nanometer composite material and an in-situ polymerization preparation method of the high-performance monomer casting nylon / graphene nanometer composite material. The preparation method is characterized in that 100 parts of caprolactam are completely melted at 90 DEG C to 130 DEG C; 0.1 to 20 parts of graphene oxide subjected to coupling and reduction treatment are added; the dispersion is performed for 10 to 100 minutes under the effect of ultrasound with the powder being 100 to 3000w and the frequency being 10000 to 100000HZ; the temperature is raised to 125 DEG C to 150 DEG C, and reduced pressure distillation is performed to remove water; then, 0.01 to 10 parts of base catalysts are added into a reaction kettle; vacuum distillation is performed for removing water again; the temperature is raised to 135 to 160 DEG C; vacuum is released; 0.01 to 10 parts of polyisocyanate activating agents are fast added; the mixture is uniformly stirred and is fast injected into a mold preheated to 160 to 200 DEG C; the polymerization reaction is performed for 20 to 120 minutes; the demolding is performed after natural cooling.

Description

technical field [0001] The invention relates to a monomer casting nylon / graphene nanocomposite material and a preparation method thereof, belonging to the field of polymer synthesis and processing. Background technique [0002] Monomer cast nylon (referred to as MC nylon) is a new type of engineering plastic developed by applying caprolactam anionic ring-opening polymerization technology. It has high molecular weight, high crystallinity, and high density. Good chemical properties, low water absorption, good dimensional stability, and can adopt the bulk polymerization method that combines polymerization and molding in a hot mold, especially suitable for large nylon molding products, and is gradually replacing copper and aluminum in many fields , steel and other metal materials, widely used in machinery, petrochemical, textile, transportation, construction, metallurgy and other industries. Graphene is a carbon material in which sp2 hybridized carbon atoms are tightly packed i...

Claims

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Application Information

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IPC IPC(8): C08G69/14C08G69/20C08K9/04C08K3/04
Inventor 叶林向萌李成杰
Owner SICHUAN UNIV
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