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Edge modified graphene, polyolefin composition, polyolefin foaming bead and polyolefin foaming bead forming body

A graphene and polyolefin technology, applied in the field of foamed polyolefin, can solve the problems of high antistatic agent addition, structural damage, poor antistatic performance, etc., and achieve short reaction cycle, low production cost and high antistatic performance Effect

Pending Publication Date: 2022-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a kind of edge-modified graphene, in order to overcome the problems of poor antistatic properties of foamed bead moldings in the prior art, high addition of antistatic agent, and destroyed structure of graphene after functionalization. Polyolefin composition, polyolefin expanded bead, and polyolefin expanded bead molded article

Method used

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  • Edge modified graphene, polyolefin composition, polyolefin foaming bead and polyolefin foaming bead forming body
  • Edge modified graphene, polyolefin composition, polyolefin foaming bead and polyolefin foaming bead forming body
  • Edge modified graphene, polyolefin composition, polyolefin foaming bead and polyolefin foaming bead forming body

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specific Embodiment approach

[0029]According to a specific embodiment of the present invention, the edge-modified graphene is prepared by a method comprising the following steps:

[0030] Step S1, adding purified or unpurified graphite powder into a high-pressure grinding disc kettle;

[0031] Step S2, passing carbon dioxide into a high-pressure grinding disc kettle and making it in a supercritical state to form a material comprising graphite powder and supercritical carbon dioxide;

[0032] Step S3, grinding the material containing graphite powder and supercritical carbon dioxide.

[0033] According to some embodiments of the present invention, the graphite powder is selected from flake graphite powder and expanded graphite powder, preferably, the particle size of the graphite powder is 10-80 mesh, preferably 20-60 mesh.

[0034] According to some embodiments of the present invention, before grinding, the graphite powder is preferably pre-purified, such as ultrasonic cleaning and / or chemical treatment, ...

Embodiment approach

[0056] According to one embodiment of the present invention, the polyolefin is polypropylene, and the grafted polyolefin is grafted polypropylene; preferably, the polypropylene is a random copolymerized polypropylene, which is obtained at a temperature of 190°C and 2.16 The melt index under kg load is 5-9g / 10min, and the molecular weight distribution is M w / M n for 5-20.

[0057] Specifically, the random copolymerized polypropylene is selected from ethylene-propylene random copolymerized polypropylene, propylene-butylene random copolymerized polypropylene, and ethylene-propylene-butylene random copolymerized polypropylene. That is, the comonomer used in the random copolymerized polypropylene is one or both of ethylene and butene. All of the random copolymer polypropylenes mentioned above are commercially available.

[0058] According to another embodiment of the present invention, the polyolefin is polyethylene, and the grafted polyolefin is grafted polyethylene.

[0059]...

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Abstract

The invention belongs to the field of foamed polyolefin, and relates to edge modified graphene, a polyolefin composition, a polyolefin foamed bead and a polyolefin foamed bead forming body. The average sheet diameter of the edge modified graphene is 2-30 [mu] m, and the average aspect ratio of the edge modified graphene is (600-10000): 1. The conductivity is 200 to 800 S / m; in the edge modified graphene, the oxygen content in terms of oxygen element is 3-30 at%, and the hydrogen content in terms of hydrogen element is 1-10 at%. The edge modified graphene is good in lamellar integrity, a good conductive network is easily formed, and the preparation method of the edge modified graphene is green, environmentally friendly and low in production cost; meanwhile, the method has the advantages of short reaction period, simple process and the like. The method for preparing the foamed beads by using the graphene as the foam nucleating agent and the antistatic agent is simple and operable, is easy to industrially popularize, and has good economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the field of expanded polyolefin, and more specifically relates to an edge-modified graphene, a polyolefin composition, a polyolefin expanded bead and a polyolefin expanded bead molded body. Background technique [0002] Compared with polystyrene expanded beads (EPS), expanded polypropylene beads (EPP) have excellent rigidity, corrosion resistance and thermal stability, and can be molded into various lightweight parts. In recent years, the demand for EPP has been increasing, and it is widely used in auto parts, packaging materials, children's entertainment equipment and other fields of impact energy absorption. However, similar to other synthetic resin products, EPP molded products will also generate static electricity due to friction, resulting in dust adhesion, affecting its application in areas with high requirements for appearance. In addition, when the human body touches the EPP molded body with static electricity, it wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/00C08K3/04C08K5/134C08K5/526C08L23/12C08L23/06C08L51/06C08J9/12C08J9/00
CPCC08K9/00C08K3/042C08K5/1345C08K5/526C08J9/122C08J9/009C08J9/0095C08J2323/12C08J2323/06C08J2451/06C08J2203/06
Inventor 郭鹏吕明福王湘徐耀辉高达利杨庆泉徐萌
Owner CHINA PETROLEUM & CHEM CORP
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