Graphene modified oxygen-resistant polyethylene master batch and preparation method and application thereof

A technology of graphene modification and polyethylene, which is applied in the field of pipes, can solve the problems of reduced barrier performance, loss of oxygen barrier ability, reduction of pipe flexibility and impact resistance, etc., and achieves improved dimensional stability, enhanced heat resistance, The effect of enhanced mechanical properties

Inactive Publication Date: 2020-05-08
江苏新奥碳纳米材料应用技术研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After absorbing moisture, the barrier performance of the gas will be greatly reduced. When used in humid environments such as cold and hot water supply, air conditioning and floor heating, and industrial heat exchange for a long time, the oxygen barrier layer will absorb moisture in different media, resulting in complete loss. Oxygen barrier capacity
[0011] Adding graphite powder and flake metal powder will improve the oxygen barrier performance of the pipe to a certain extent, but the amount of addition is often large, which not only makes the transportation and construction difficult after the density of the pipe increases, but also makes the flexibility and impact resistance of the pipe drop sharply.
[0012] The intermolecular force between graphene layers is strong, it is easy to stack and agglomerate together, it is not easy to fully peel off and evenly disperse in the polymer matrix, so it is difficult to form a uniform and stable network, and it is impossible to play graphene in resistance. Potential Advantages of Oxygen Tubing Applications
[0013] The density of graphene powder is low, and the difference between the density of the polymer matrix is ​​large. It is difficult to achieve high concentration filling in the process of blending and granulation, which makes the processing of masterbatch difficult, and it is easy to have some consistency problems of high or low concentration. Difficult to achieve stable high-content filling of graphene

Method used

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  • Graphene modified oxygen-resistant polyethylene master batch and preparation method and application thereof
  • Graphene modified oxygen-resistant polyethylene master batch and preparation method and application thereof
  • Graphene modified oxygen-resistant polyethylene master batch and preparation method and application thereof

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Effect test

Embodiment 1

[0080] The preparation method of the graphene-modified oxygen-barrier polyethylene masterbatch and the application of the graphene-modified oxygen-barrier polyethylene masterbatch as a pipe include the following steps:

[0081] S11. Add 20 parts of graphene prepared by mechanical exfoliation, 5 parts of montmorillonite, 10 parts of SEBS, 0.3 part of silane coupling agent KH550, 5 parts of EBS, and 0.5 part of phosphorus antioxidant into a high-speed mixer, Mix at ℃ for 20min and rotate at 500rpm to obtain a pre-dispersed and coated mixed filler;

[0082] S12. Add the mixed filler obtained in S11 and 59.2 parts of PE-RT resin granules into a rotary internal mixer, and knead at 200° C. for 20 minutes to obtain an initial graphene-modified polyethylene mass;

[0083] S13. The initial graphene-modified polyethylene mass obtained in S12 is granulated through a twin-screw extruder, and the extrusion temperature is 210° C. to obtain the final graphene-modified polyethylene masterbatc...

Embodiment 2

[0086] The preparation method of the graphene-modified oxygen-barrier polyethylene masterbatch and the application of the graphene-modified oxygen-barrier polyethylene masterbatch as a pipe include the following steps:

[0087]S21. 40 parts of graphene prepared by mechanical exfoliation, 10 parts of montmorillonite, 20 parts of SEBS, 1 part of silane coupling agent KH550, 10 parts of EBS, 0.3 part of phosphorus antioxidant are added in the high-speed mixer, and the Mix at ℃ for 20min and rotate at 500rpm to obtain a pre-dispersed and coated mixed filler;

[0088] S22. The mixed filler obtained in S21 and 18.7 parts of PE-RT resin particles were added to an overturning internal mixer, and mixed for 20 minutes at 200° C. to obtain an initial graphene-modified polyethylene mass;

[0089] S23. The initial graphene-modified polyethylene mass obtained in S22 is granulated through a twin-screw extruder at an extrusion temperature of 210° C. to obtain the final graphene-modified polye...

Embodiment 3

[0092] The preparation method of the graphene-modified oxygen-barrier polyethylene masterbatch and the application of the graphene-modified oxygen-barrier polyethylene masterbatch as a pipe include the following steps:

[0093] S31. 10 parts of graphene prepared by mechanical exfoliation, 5 parts of montmorillonite, 5 parts of SEBS, 0.1 part of silane coupling agent KH550, 0.5 part of EBS, 0.1 part of phosphorus antioxidant are added in the high-speed mixer, and the Mix at ℃ for 20min and rotate at 500rpm to obtain a pre-dispersed and coated mixed filler;

[0094] S32. Add the mixed filler obtained in S31 and 79.3 parts of PE-RT resin granules into the rotary internal mixer, and knead at 200° C. for 20 minutes to obtain the initial graphene-modified polyethylene mass;

[0095] S33. Pelletizing the initial graphene-modified polyethylene mass obtained in S32 through a twin-screw extruder at an extrusion temperature of 210° C. to obtain the final graphene-modified polyethylene ma...

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Abstract

The invention relates to the technical field of functionalization and high performance of plastic pipes, in particular to a graphene modified oxygen-resistant polyethylene master batch and a preparation method and application thereof. The modified plastic master batch is composed of the following components: a polyethylene matrix, graphene, a second oxygen inhibitor, a coating agent, a surface treating agent, a dispersing agent and an antioxidant. According to the three-step production process, the mixing, dispersing and stripping effects of graphene in a polyethylene matrix are improved, thefilling proportion of graphene in the composite material is increased through organic combination of a new material, a new technology and a new method, and formation of a perfect network structure inthe composite material matrix is promoted. The oxygen barrier property of the composite material can be remarkably improved through good construction of a network, so that the application potential ofgraphene in the oxygen barrier pipe is brought into full play, and the pipe filled with the high-barrier graphene nanosheet layer structure is obtained.

Description

technical field [0001] The invention relates to a pipe material, in particular to a graphene-modified oxygen-blocking polyethylene masterbatch, a preparation method and an application thereof. Background technique [0002] Polyethylene pipe is a pipe prepared by direct extrusion or mixed extrusion with other powder fillers based on polyethylene resin. Compared with metal pipes, polyethylene pipes are light in material, high in specific strength, corrosion-resistant, long in service life, good in flexibility, low in installation and maintenance costs, good in mechanical properties, large in output, easy to process, low in price, and widely used , is one of the five general-purpose plastics, and has important application prospects in cold and hot water supply, low-temperature radiant floor heating systems, ceiling refrigeration, air-conditioning pipelines, heat pumps, radiator connections, industrial heat exchange pipes, and fishery insulation pipes. [0003] Due to the poor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K13/06C08K9/10C08K9/06C08K9/04C08K3/04C08K3/34C08K5/20C08J3/22
CPCC08J3/226C08J2323/06C08J2423/06C08J2423/08C08K2201/011C08L23/06C08L2201/08C08L2201/14C08L2203/18C08L2207/062C08L2207/066C08L2207/068C08K13/06C08K9/10C08K9/06C08K3/042C08K3/346C08K5/20C08L23/08C08K9/04Y02P20/52
Inventor 朱亚坤翟乐樊振兴徐欢李金来
Owner 江苏新奥碳纳米材料应用技术研究院有限公司
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