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A carbon nanotube modified polyolefin double resistance material and its preparation method and application

A carbon nanotube modification and carbon nanotube technology, which is applied in the field of flame retardant and antistatic polyolefin composite materials, can solve the problems of a large amount of flame retardant, brittle pipes, poor pressure resistance, etc., and can promote flame retardancy. agent, improve the service life, and avoid the effect of tube brittleness

Active Publication Date: 2022-04-01
SHANDONG DONGHONG PIPE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Using polyolefin as the matrix, through the synergistic effect of carbon nanotubes and synergistic conductive agents, the powerful and efficient shearing, rolling, and pulverization of the two grinding discs of the mill achieves its uniform dispersion in polyolefin, combining With the function of high-efficiency flame retardants, polyolefin double-resistant materials and pipes with excellent flame-retardant and antistatic effects have been obtained, which solves the problem of traditional flame-retardant and anti-static pipes being brittle and resistant to corrosion due to large amounts of conductive agents and flame retardants added. Industry problems with poor pressure capacity

Method used

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  • A carbon nanotube modified polyolefin double resistance material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation of the polyolefin elastomer of maleic anhydride, polysiloxane bifunctional grafting: the polyethylene-octene copolymer (8200, Dow Chemical) of 78.42% by weight, the maleic anhydride of 1.5%, 20% After the polysiloxane and 0.08% organic peroxide dicumyl peroxide are mixed evenly, the bifunctional grafting is carried out at 200-210°C by a twin-screw extruder to obtain maleic anhydride, polysiloxane grafted branched polyolefin elastomer (POE-g-MAH / Si).

[0041] Surface treatment of S1 conductive agent:

[0042] Multi-walled carbon nanotubes (NC7000, Belgium Nanocyl) 3%, superconducting carbon black (Ketjen Black ECP600JD) 2.5%, Add 1.5% of dispersant (6879, Evonik Degussa) into the high mixer, mix at 500rpm for 30min, and discharge for later use.

[0043] Preparation of Conductive Agent / Polyethylene Composite Powder by S2 Rotary Shear Dispersion

[0044] Mix the conductive agent mixture treated with S1 and 50% grade 100 polyethylene pipe material (100S,...

Embodiment 2

[0083] The preparation of the polyolefin elastomer of maleic anhydride, polysiloxane bifunctional graft: the polyethylene-octene copolymer (LC170 of LG chemistry) of weight ratio 50%, 37.95% polyethylene-butene copolymer ( LC565, LG Chemical), 2% of maleic anhydride, 10% of polysiloxane, 0.05% of organic peroxide di-tert-butyl peroxide mixed evenly, using a twin-screw extruder at 230 ℃ for double Functional grafting to obtain maleic anhydride, polysiloxane grafted polyolefin elastomer (POE-g-MAH / Si).

[0084] Surface treatment of S1 conductive agent:

[0085] Single-walled carbon nanotubes (TNSR, Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences) 2%, chopped carbon fibers (length 3mm) 4%, Add 2% of DS 360 dispersant (Yantai Wanhua) into the high mixer, mix at 800rpm for 20min, and discharge for later use.

[0086] Preparation of Conductive Agent / Polyethylene Composite Powder by S2 Rotary Shear Dispersion

[0087] Mix the conductive agent mixture treated with...

Embodiment 3

[0093] The preparation of the polyolefin elastomer of maleic anhydride, polysiloxane bifunctional graft: the polyethylene-vinyl acetate copolymer (3170, Du Pont) of weight ratio 83.98%, 1% maleic anhydride, 15% After polysiloxane and 0.02% organic peroxide 2,5-dimethyl-2,5-di-tert-butylperoxyhexane are mixed uniformly, bifunctional grafting is carried out at 170°C using a twin-screw extruder , to obtain maleic anhydride, polysiloxane grafted polyolefin elastomer (EVA-g-MAH / Si).

[0094] Surface treatment of S1 conductive agent:

[0095] Multi-walled carbon nanotubes (GT210, Shandong Dazhan Nano Material Co., Ltd.) 5%, carbon fiber powder (50 orders) 0.5%, SOLPLUS TM Add 0.8% of K240 dispersant (Lubrizol) into the high mixer, mix at 600rpm for 40min, and discharge for later use.

[0096] Preparation of Conductive Agent / Polyethylene Composite Powder by S2 Rotary Shear Dispersion

[0097] Mix the conductive agent mixture treated with S1 and 40% heat-resistant polyethylene pip...

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Abstract

The invention relates to a polyolefin double-resistance material modified by carbon nanotubes, a preparation method and application thereof. The polyolefin double resistance material, the raw material is composed of the following raw materials in parts by mass: 60-92 parts of polyolefin matrix, 2-5 parts of carbon nanotubes, 0.5-4 parts of synergistic conductive agent, 0.3-4 parts of carbon nanotube dispersant 2 parts, 4-20 parts of flame retardant, 2-8 parts of polyolefin elastomer grafted with maleic anhydride and polysiloxane bifunctionality, 0.2-1.2 parts of antioxidant. The problem of difficult dispersion of carbon nanotubes in polymers is solved. The carbon nanotube-modified polyolefin double-resistant material has excellent antistatic properties, flame retardancy, and good mechanical properties; the tubes prepared therefrom have smooth surfaces, excellent comprehensive performance, strong pressure resistance, and are flame-retardant The antistatic performance meets the standard requirements of mining pipelines.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant and antistatic polyolefin composite materials, and in particular relates to a polyolefin double-resistance material modified by carbon nanotubes and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Plastic pipes are prone to generate static electricity due to friction. If static electricity cannot be eliminated in time, it may cause dangerous hidden dangers such as fire and explosion, especially in chemical, mining and other fields. Generally, the antistatic and flame retardant properties of polymers are improved by adding conductive fillers such a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L51/06C08L51/08C08K3/04C08K9/00C08K3/02C08K5/134C08K13/06
CPCC08L23/06C08K2003/026C08K2201/001C08L2201/04C08L2203/18C08L2201/02C08L2205/03C08L51/06C08L51/08C08K3/041C08K3/04C08K9/00C08K3/02C08K5/1345C08K13/06
Inventor 倪奉尧伍金奎孔智勇倪奉龙孔涛孔伟川孙之状孔德彬刘树
Owner SHANDONG DONGHONG PIPE IND
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