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Preparation method of banded graphene oxide reinforced nylon composite material

A technology of nylon composite materials and graphene, which is applied in the field of plastic materials, can solve the problems of poor dispersion of graphene and limited improvement of mechanical properties of nylon materials, and achieve the effect of improving mechanical properties, improving mechanical properties, and increasing dispersion effect

Inactive Publication Date: 2018-01-26
深圳市八六三新材料技术有限责任公司 +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a method for preparing a strip-shaped graphene oxide reinforced nylon composite material, aiming to solve the problem of graphene in the prior art when using graphene to modify nylon materials. Poor dispersion in nylon materials and limited improvement of mechanical properties of nylon materials

Method used

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  • Preparation method of banded graphene oxide reinforced nylon composite material

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preparation example Construction

[0022] see figure 1 , figure 1 It is a flowchart of a preparation method of a strip-shaped graphene oxide reinforced nylon composite material of the present invention, as shown in the figure, it includes steps:

[0023] S1, placing the carbon fiber in a vacuum or an inert gas protective atmosphere for heat treatment and stretching to obtain a stretched carbon fiber;

[0024] S2, adding the stretched carbon fiber into a mixed solution of concentrated sulfuric acid and potassium ferrate, and reacting at 50-70°C for 24-48h to obtain striped graphene oxide;

[0025] S3, adding the strip-shaped graphene oxide and ammonium sulfamate into deionized water, and heating at 70-100° C. for 4-6 hours to obtain modified strip-shaped graphene oxide;

[0026] S4. Dispersing and mixing the nylon raw material and the modified strip-shaped graphene oxide, and sequentially melting, kneading, extruding, cooling, drying, pelletizing, and packaging to obtain a strip-shaped graphene oxide-reinforce...

Embodiment 1

[0042]Use Zhongfu Shenying SYT35 carbon fiber without surface treatment and without protective layer, with a carbon content of 95%, and place it in a vacuum at 2500°C for heat treatment for 4 hours, and stretch the heat-treated carbon fiber to 0.5% of its original size. Prepare a mixed solution of 100ml of concentrated sulfuric acid and 10g of potassium ferrate at a low temperature of 3°C, put the above stretched carbon fiber into the mixed solution, react at 50°C for 24 hours, and centrifuge, wash, and dry the reacted product to obtain Strip-shaped graphene oxide, add 100g of the above-mentioned strip-shaped graphene oxide and 10g of ammonium sulfamate into 1L of deionized water, heat at 70°C for 5h, and then undergo centrifugation, water washing, and drying to obtain modified strip-shaped graphene oxide. Graphene, then 100g nylon 66, 1g modified strip-shaped graphene oxide, dispersed and mixed, and then successively undergo remelting, kneading, extrusion, cooling, drying, pel...

Embodiment 2

[0045] Use Zhongfu Shenying SYT35 carbon fiber without surface treatment and without protective layer, with a carbon content of 97%, heat treatment in a vacuum at 2700°C for 5 hours, and stretch the heat-treated carbon fiber to 1% of its original size. Prepare a mixed solution of 100ml of concentrated sulfuric acid and 25g of potassium ferrate at a low temperature of 4°C, put the above stretched carbon fiber into the mixed solution, react at 60°C for 36 hours, and centrifuge, wash and dry the reacted product to obtain Strip-shaped graphene oxide, add 100g of the above-mentioned strip-shaped graphene oxide and 15g of ammonium sulfamate into 1L of deionized water, heat at 80°C for 5h, successively undergo centrifugation, water washing, and drying to obtain modified strip-shaped graphene oxide Graphene, then 100g nylon 66, 2.5g modified strip-shaped graphene oxide, dispersed and mixed, and then successively undergo remelting, kneading, extrusion, cooling, drying, pelletizing and p...

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Abstract

The invention discloses a preparation method of a banded graphene oxide reinforced nylon composite material; a carbon fiber is used for preparation of banded graphene oxide, then the banded graphene oxide is modified by ammonium sulfamate, the modified banded graphene oxide is prepared, the modified banded graphene oxide is added into a nylon raw material, and the nylon composite material is prepared by a conventional melt blending method. The modified banded graphene oxide can significantly enhance mechanical properties of the nylon material under conditions without changing of the processingperformance; at the same time, graphene oxide has extremely strong barrier effect, oxygen is prevented from entering a substrate and combustible gas is prevented from overflowing after the substrateis heated, and the flame retardant performance of nylon can be significantly improved with cooperation of ammonium sulfamate.

Description

technical field [0001] The invention relates to the field of plastic materials, in particular to a method for preparing strip-shaped graphene oxide reinforced nylon composite materials. Background technique [0002] Nylon is the basic material with the largest output, the most varieties, the widest application and excellent performance among general engineering plastics. Nylon has non-toxic, light weight, excellent mechanical strength, wear resistance and good corrosion resistance, so it is widely used to replace metal in the manufacture of bearings, gears, pump blades and other products in machinery, chemical industry, instrumentation, automobile and other industries Components. However, due to the easy formation of hydrogen bonds between the acyl groups of nylon and water molecules, it has greater water absorption, resulting in poor dimensional stability of the product, but the product has high hygroscopicity, poor dimensional stability, and its strength and hardness are ...

Claims

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Application Information

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IPC IPC(8): C08L77/00C08K9/04C08K9/02C08K7/00C08K3/04
Inventor 孙耀明彭晓华陈寿唐武飞张玲王鑫涂建国
Owner 深圳市八六三新材料技术有限责任公司
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