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Oil-filled monomer casting nylon composite material

A composite material and casting nylon technology, which is applied in the field of casting nylon composite materials and oil-containing casting nylon composite materials, can solve the problem of high friction coefficient, and achieve the effects of wide application range, improved wear resistance, and improved tribological performance.

Inactive Publication Date: 2013-02-27
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese invention patent CN102352035A discloses a low-content graphene-modified cast nylon composite material, the mechanical properties and friction properties of cast nylon are improved; but its friction coefficient is relatively high, which limits its promotion to a certain extent application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Using the technical scheme of caprolactam and graphene weight ratio of 100:3:0.005, liquid paraffin and graphene are mixed into caprolactam, and catalyzed polymerization is made into cast nylon composite material. The specific preparation method is as follows:

[0015] Add 100 parts of caprolactam into a reaction kettle with an ultrasonic device under continuous stirring, melt the caprolactam at a temperature of 70°C, add 3 parts of liquid paraffin and 0.005 parts of graphene, and mechanically stir at an ultrasonic power of 190w and a frequency of 120Hz The speed is 500 rpm, the temperature is 100° C., and the dispersion is performed for 2 hours to obtain a graphene caprolactam dispersion. At a temperature of 110°C and a vacuum of 0.07 MPa, dehydrate for 5 minutes. Then add 0.1 part of metallic potassium as a catalyst, and continue vacuum dehydration for 5 minutes at a vacuum degree of 0.07 MPa. Open the valve to release the vacuum, add 0.1 part of toluene diisocyanate...

Embodiment 2

[0017] Using the technical scheme of caprolactam and graphene weight ratio of 100:10:0.075, graphene is mixed into caprolactam, and catalytic polymerization is used to make cast nylon composite materials. The specific preparation method is as follows:

[0018] Add 100 parts of caprolactam into a reaction kettle with an ultrasonic device under continuous stirring conditions, melt the caprolactam at a temperature of 130°C, add 5 parts of liquid paraffin and 0.05 parts of graphene, and mechanically stir at an ultrasonic power of 200w and a frequency of 150Hz The speed is 600 rpm, the temperature is 120° C., and the dispersion is performed for 5 hours to obtain a graphene caprolactam dispersion. At a temperature of 150°C and a vacuum of 0.099MPa, dehydrate for 40 minutes. Then add 1 part of sodium carbonate as a catalyst, and continue vacuum dehydration for 40 minutes at a vacuum of 0.099 MPa. Open the valve to release the vacuum, add 1.5 parts of diphenylmethane diisocyanate, st...

Embodiment 3

[0020] Using the technical solution of caprolactam and graphene weight ratio of 100:5:0.05, graphene is mixed into caprolactam and catalyzed polymerization to make cast nylon composite material. The specific preparation method is as follows:

[0021] Add 100 parts of caprolactam into a reaction kettle with an ultrasonic device under continuous stirring, melt the caprolactam at a temperature of 120°C, add 10 parts of liquid paraffin and 0.05 parts of graphene, and mechanically stir at 180w of ultrasonic power and 100Hz frequency The speed is 800 rpm, the temperature is 110° C., and the dispersion is performed for 30 minutes to obtain a graphene caprolactam dispersion. At a temperature of 130°C and a vacuum of 0.095 MPa, dehydrate for 20 minutes. Then add 0.25 parts of sodium hydroxide as a catalyst, and continue vacuum dehydration for 30 minutes at a vacuum degree of 0.095 MPa. Open the valve to release the vacuum, add 3.0 parts of triphenylmethane triisocyanate, stir quickly ...

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Abstract

The invention discloses an oil-filled monomer casting nylon composite material which is formed by catalytic polymerization of hexanolactam doped with liquid paraffin and grapheme, wherein the weight ratio of hexanolactam to liquid paraffin to grapheme is 100 : (3-10) : (0.05-0.075). The prepared composite material is enhanced in tribological properties, particularly obviously decreased friction coefficient and greatly increased abrasion resistance. The friction coefficient of the composite material is 23.5%-41.1% based on that of a conventional material; the volume abrasion rate of the composite material is 31.8%-55.5% based on that of the conventional material; and the composite material can be widely used as raw materials of manufactured parts.

Description

technical field [0001] The invention relates to an oil-containing cast nylon composite material, in particular to a cast nylon composite material modified by liquid paraffin and graphene, and belongs to the technical field of polymer composite materials. Background technique [0002] Cast nylon (monomer casting nylon, or MC nylon) is to use a strong basic substance as a catalyst for the molten caprolactam monomer as a raw material under normal pressure, and together with a cocatalyst, directly inject it into a mold that is preheated to a certain temperature. The material undergoes a polymerization reaction quickly in the mold and condenses into a tough solid product. Cast nylon has a high degree of polymerization, high molecular weight and crystallinity, and has better performance than other engineering plastics. It is widely used to manufacture wear-resistant and anti-friction parts, especially for large-scale products that cannot be solved by injection molding and compress...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/16C08K5/01C08K3/04
Inventor 潘炳力杜锦屏成玉梅杜三明刘继纯张永振
Owner HENAN UNIV OF SCI & TECH
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