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Polymer composite material with high gas barrier property

A composite material and polymer technology, which is applied in the field of polymer composite materials, can solve problems such as blasting of the outer protective layer, collapse of the outer pressure layer, and acceleration of the failure rate of the flexible riser, so as to achieve the effect of improving the barrier performance

Pending Publication Date: 2022-05-10
CHINA NATIONAL OFFSHORE OIL (CHINA) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As an important equipment for offshore oil and gas exploitation, the failure of the flexible riser will cause immeasurable losses
At present, the lining layer of the flexible riser is used as the internal pressure sealing layer, which directly plays a sealing role. However, for polymer materials, gas permeation is unavoidable. During the use of the flexible riser, small gas molecules penetrate into the annulus. , forming a corrosive environment, which can easily lead to corrosion failure of the tensile layer and inner pressure layer, and the increase of annular pressure can cause the outer pressure layer to collapse, and the outer protective layer to explode, etc.
At present, the commonly used flexible riser materials are HDPE, PA11, PVDF, etc., but the gas permeates too fast, which accelerates the failure rate of the flexible riser

Method used

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  • Polymer composite material with high gas barrier property
  • Polymer composite material with high gas barrier property
  • Polymer composite material with high gas barrier property

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Step 01: Oxidative modification of graphene by the Hummers method to obtain graphene oxide;

[0043] Step 02: Grind the obtained graphene oxide and dry it at 0°C for 24 hours; use a low-energy ball mill (500r / min) to mechanically mix high-density polyethylene (brand 5000S) and graphene oxide in a certain proportion, and the mixing time is 1 hour ;

[0044] Step 03: Dry the mechanically mixed high-density polyethylene and graphene oxide at 70°C for 24 hours, and then granulate through twin-screw extrusion; the barrel temperatures of the twin-screw extruders are: zone 1, 150°C, zone 2, 190°C , Zone 3, 190°C, Zone 4, 190°C, Zone 5, 150°C

[0045] Step 04: Use a flat vulcanizer to prepare a 500um sheet; the pressure of the flat vulcanizer to press the sheet is 30MPa, hot press for 5 minutes, and then turn to room temperature and press at 25°C for 10 minutes;

[0046] Step 05: Conduct CO 2 and CH 4 Permeability test. (The prepared samples were tested for CO by the delay...

Embodiment 2

[0051] Step 01: Oxidative modification of graphene by the Hummers method to obtain graphene oxide;

[0052] Step 02: Grind the obtained graphene oxide and dry it at 0°C for 24 hours; use a low-energy ball mill (500r / min) to mechanically mix high-density polyethylene (brand 8008H) and graphene oxide in a certain proportion, and the mixing time is 1 hour ;

[0053] Step 03: Dry the mechanically mixed high-density polyethylene and graphene oxide at 70°C for 24 hours, and then granulate through twin-screw extrusion; the barrel temperatures of the twin-screw extruders are: zone 1, 150°C, zone 2, 190°C , Zone 3, 190°C, Zone 4, 190°C, Zone 5, 150°C

[0054] Step 04: Use a flat vulcanizer to prepare a 500um sheet; the pressure of the flat vulcanizer to press the sheet is 30MPa, hot press for 5 minutes, and then turn to room temperature and press at 25°C for 10 minutes;

[0055] Step 05: Conduct CO 2 and CH 4 Permeability test.

[0056] Table 3 shows the performance parameters of ...

Embodiment 3

[0060] Step 01: Oxidative modification of graphene by the Hummers method to obtain graphene oxide;

[0061] Step 02: Grind the obtained graphene oxide and dry it at 0°C for 24 hours; use a low-energy ball mill (500r / min) to mechanically mix high-density polyethylene (brand 2200J) and graphene oxide in a certain proportion, and the mixing time is 1 hour ;

[0062] Step 03: Dry the mechanically mixed high-density polyethylene and graphene oxide at 70°C for 24 hours, and then granulate through twin-screw extrusion; the barrel temperatures of the twin-screw extruders are: zone 1, 150°C, zone 2, 190°C , Zone 3, 190°C, Zone 4, 190°C, Zone 5, 150°C

[0063] Step 04: Use a flat vulcanizer to prepare a 500um sheet; the pressure of the flat vulcanizer to press the sheet is 30MPa, hot press for 5 minutes, and then turn to room temperature and press at 25°C for 10 minutes;

[0064] Step 05: Conduct CO 2 and CH 4 Permeability test.

[0065] Table 4 is the performance parameter of the ...

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Abstract

The invention discloses a polymer composite material with high gas barrier property. The preparation method comprises the following steps: 01, carrying out oxidation modification on graphene to obtain graphene oxide; 02, mechanically mixing high-density polyethylene and graphene oxide according to a certain proportion by using low-energy ball milling; 03, extruding and granulating the mechanically mixed high-density polyethylene and graphene oxide through a twin-screw extruder; 04, preparing a 500-micron sheet by using a plate vulcanizing machine; and 05, testing the permeability coefficients of CO2 and CH4. The polymer composite material provided by the invention has high gas barrier property on the basis of not influencing mechanical properties, can be particularly applied to flexible risers for offshore oil and gas, and also can be applied to general risers with required gas barrier property.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a polymer composite material with high gas barrier performance. Background technique [0002] As an important equipment for offshore oil and gas exploitation, the failure of the flexible riser will cause immeasurable losses. At present, the lining layer of the flexible riser is used as the internal pressure sealing layer, which directly plays a sealing role. However, for polymer materials, gas permeation is unavoidable. During the use of the flexible riser, small gas molecules penetrate into the annulus. , forming a corrosive environment, which can easily lead to corrosion failure of the tensile layer and the inner pressure layer, and the increase of annular pressure can cause the collapse of the outer pressure layer and the explosion of the outer protective layer. At present, commonly used flexible riser materials include HDPE, PA11, PVDF, etc., but the gas permeates too fast, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K3/04
CPCC08K3/042C08L2201/14C08L2207/062C08L23/06
Inventor 喻西崇李焱李清平张恩勇郑利军王云飞丛川波张晓灿周琼郭江艳庞维新秦蕊刘永飞
Owner CHINA NATIONAL OFFSHORE OIL (CHINA) CO LTD
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