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High temperature and molten droplet resistant graphene/ nylon-6 composite board and preparation method thereof

A composite sheet and graphene technology, applied in the field of polymer composite materials, can solve the problems of nylon resin degradation and oxidation, high energy consumption, large dosage, etc., to improve high-temperature performance, reduce dripping speed, and add less Effect

Active Publication Date: 2017-05-31
HANGZHOU GAOXI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, adding graphene to nylon 6 can not only improve the mechanical strength and high-temperature performance of nylon 6, but also improve its anti-droplet performance. Such multiple effects cannot be achieved by traditional nylon 6 modifiers.
[0004] Chinese patent CN104277453A uses andalusite etc. as modifiers to improve the heat resistance of nylon, but its consumption is relatively large, being 5-25%
Chinese patent CN103923348A uses graphene instead of polytetrafluoroethylene as the anti-droplet agent, and has achieved a certain flame-retardant and anti-droplet effect, but the method used is mechanical blending, which easily leads to degradation and oxidation of nylon resin, and requires secondary Processing, high energy consumption, and the amount of graphene used is more than 0.5%

Method used

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  • High temperature and molten droplet resistant graphene/ nylon-6 composite board and preparation method thereof
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  • High temperature and molten droplet resistant graphene/ nylon-6 composite board and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0023] 100 parts by mass of caprolactam salt are heated and melted, and 0.6 parts by mass of graphene are added while stirring. The lateral size of the graphene used is 15 microns, the carbon-to-oxygen ratio is 3.5, and the oxygen-containing functional groups are mainly composed of carboxyl groups and hydroxyl groups. After mixing evenly, add it to the reactor, and react for 2-3 hours under the protection of nitrogen atmosphere at a temperature of 250°C and a pressure of 0.6-0.9MPa. Then react in vacuum for 4h. The resulting melt is cooled in a water tank and then granulated. Then add 0.2 parts by mass of additives containing antioxidants and antistatic agents to melt and extrude the sheet. The melt temperature during extrusion is 275° C., the screw speed is 60 rpm, and the pulling speed is 2 m / min. The relevant properties of the obtained graphene / nylon 6 composite sheet are shown in Table 1.

Embodiment 2

[0025] 100 parts by mass of caprolactam salt were heated and melted, and 0.3 parts by mass of graphene was added while stirring. The graphene used had a lateral size of 15 microns, a carbon-to-oxygen ratio of 3.5, and oxygen-containing functional groups mainly composed of carboxyl groups and hydroxyl groups. After mixing evenly, add it to the reactor, and react for 2-3 hours under the protection of nitrogen atmosphere at a temperature of 250°C and a pressure of 0.6-0.9MPa. Then react in vacuum for 4h. The resulting melt is cooled in a water tank and then granulated. Then add 0.2 parts by mass of additives containing antioxidants and antistatic agents to melt and extrude the sheet. The melt temperature during extrusion is 275° C., the screw speed is 60 rpm, and the pulling speed is 2 m / min. The relevant properties of the obtained graphene / nylon 6 composite sheet are shown in Table 1.

Embodiment 3

[0027] 100 parts by mass of caprolactam salt are heated and melted, and 0.2 parts by mass of graphene are added while stirring. The graphene used has a transverse dimension of 15 microns, a carbon-to-oxygen ratio of 3.5, and oxygen-containing functional groups mainly composed of carboxyl groups and hydroxyl groups. After mixing evenly, add it to the reactor, and react for 2-3 hours under the protection of nitrogen atmosphere at a temperature of 250°C and a pressure of 0.6-0.9MPa. Then react in vacuum for 4h. The resulting melt is cooled in a water tank and then granulated. Then add 0.2 parts by mass of additives containing antioxidants and antistatic agents to melt and extrude the sheet. The melt temperature during extrusion is 275° C., the screw speed is 60 rpm, and the pulling speed is 2 m / min. The relevant properties of the obtained graphene / nylon 6 composite sheet are shown in Table 1.

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Abstract

The invention discloses a high temperature and molten droplet resistant graphene / nylon-6 composite board and a preparation method thereof, and belongs to the field of polymer composites. The graphene / nylon-6 composite board is obtained by melt extrusion of a graphene / nylon-6 composite material. The graphene / nylon-6 composite material is obtained by in-situ polymerization of nylon-6, graphene and aids. The composite board prepared by the method has excellent physical and mechanical properties, and the thermal deformation temperature, molten droplet resistance and high-temperature yield strength are significantly improved as compared with an uncompounded pure nylon-6 body board. The graphene / nylon-6 composite board prepared by the method is simple in manufacturing process and low in cost, has good high temperature and molten droplet resistance, and can be used as high temperature resistant engineering pieces, flame-retardant building materials, etc.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and in particular relates to a high-temperature-resistant and droplet-resistant graphene / nylon 6 composite plate and a preparation method thereof. Background technique [0002] Nylon 6 has excellent mechanical strength, good wear resistance and self-lubrication and chemical resistance, good low temperature performance, easy processing and production, and is widely used in engineering plastics, synthetic fibers, packaging materials and other fields. However, the mechanical strength of the traditional nylon 6 material will decrease rapidly with the increase of the ambient temperature, and rapid melting and dripping will occur when burning, which limits the application range of nylon 6. [0003] Graphene is a two-dimensional single-layer carbon material, sp 2 The hybrid conjugated carbon-carbon double bond structure endows it with excellent properties. The elastic modulus of graphene can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08K3/04C08K9/04C08G69/16
Inventor 高超韩燚刘威陈琛杨清李友良陈国贵
Owner HANGZHOU GAOXI TECH CO LTD
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