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Preparation method for compound metal fiber

A metal composite and metal fiber technology, applied in the field of materials, to shorten the processing time and avoid uneven heating

Active Publication Date: 2017-05-31
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In fact, when the composite fiber is heated in a microwave oven for a period of time, after taking it out, it can be clearly felt that the heating effect of the composite fiber placed in different heating areas is different, which is related to the uniformity of the heating electric field in the microwave oven. The antenna structure and other methods can improve the heating uniformity of the microwave oven, but it also has a certain limit

Method used

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  • Preparation method for compound metal fiber
  • Preparation method for compound metal fiber

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Experimental program
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Effect test

Embodiment 1

[0026] First, graphene oxide powder and reduced graphene oxide powder are prepared. 30 grams of graphite mixed with 15 grams of sodium nitrate and 750 milliliters of concentrated sulfuric acid. The mixture was cooled to 0°C in an ice bath, and after stirring for 2 h, 90 g of potassium permanganate was slowly added, keeping the temperature of the mixture below 5°C during the mixing process. The mixture was stirred for another hour and allowed to warm to room temperature by removing the ice bath. Add 1 liter of distilled water to the mixture and increase the temperature in the oil bath to 90°C. Another 300 ml of water were added and stirred for another hour and a half. The color of the mixture turned brown. The mixture was then treated and diluted with 30% hydrogen peroxide in 300 ml and 30 liters of hot water. The mixture was further washed with excess water until the pH of the filtrate was almost neutral to obtain graphene oxide. Then freeze-dry the graphene oxide to obta...

Embodiment 2

[0029] First obtain an aluminum wire with a diameter of 1 mm, then pass the aluminum wire through a 30 cm long 10 mg / ml graphene oxide aqueous solution at a speed of 0.1 m / s, and obtain a composite aluminum coated with a graphene oxide layer after drying Wire. The composite aluminum wire was heated under the protection of a reducing atmosphere with a ratio of nitrogen and hydrogen of 55:1 at a speed of 0.1 m / s at 200 degrees Celsius for about 1 second through a microwave oven with a power of 1000 W and a diameter of 10 cm in a heating zone, and then again Enter the room temperature area for cooling, and then the composite aluminum wire is extruded through an extrusion roller with a line pressure of 1000 N / cm, and the above microwave heating-cooling-extrusion process is repeated 20 times. Obtain a graphene layer with a carbon content greater than 90% and an electrical conductivity greater than 5000Sm -1 Composite aluminum wires coated with graphene layers. The composite alumi...

Embodiment 3

[0031] Edge carboxylated graphene flakes are first prepared. 5 grams of graphite and 100 grams of dry ice were added to a stainless steel capsule containing 1000 grams of 5 mm diameter stainless steel spheres. The container was sealed and fixed in a planetary ball mill (F-P4000), and stirred at a speed of 500 rpm (rotation per minute) for 48 hours. The internal pressure is then slowly released through a gas outlet. At the end of the ball milling, the lid of the container is opened in the air, and the moisture in the air triggers the carboxylate to undergo a violent hydration reaction to generate carboxylic acid and emit light. The obtained product was subjected to Soxhlet extraction with 1M hydrochloric acid solution to fully acidify the carboxylate and remove possible metal impurities. Finally, freeze-dry at minus 120 degrees Celsius for 48 hours in a vacuum environment of 0.05 mm Hg to obtain a dark black powder of edge carboxylated graphene nanosheets. Edge carboxylated ...

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Abstract

The invention discloses a preparation method for a compound metal fiber. The method comprises the following steps: firstly, combining a microwave technique capable of quickly heating with the microwave absorbing characteristic of graphene ramification and the microwave eddy heating characteristic of the metal fiber surface, and meanwhile, combining the high thermal conductance of the graphene with the characteristic of easiness in quickly exchanging and transferring the heat of the graphene layer, quickly converting the graphene ramification coated on the surface of the metal fiber into graphene with low energy consumption, thereby obtaining the compound metal fiber with excellent electric conduction and corrosion resistance. The preparation method can make a contribution to the further development and application of the metal fiber and the graphene material.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a metal composite fiber, especially a method for obtaining a composite fiber whose core is a metal fiber shell and which is a graphene layer by coating a metal fiber with a graphene derivative solution by microwave heating. Background technique [0002] With the development of society, metal fibers have been widely used in a wide range of fields including wire and cable, mechanical reinforcement, electrode materials, sensor devices, etc. due to their good mechanical properties, electrical properties and many other advantages. However, the existence of some problems of the metal fiber itself, including the corrosion problem and the electrical conductivity to be improved, limit its further popularization and application. Therefore, the coating modification of metal fibers has attracted people's attention, and has achieved rapid development in aspects including polymer coating, coating coatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M10/06D06M10/00
CPCD06M10/003D06M10/06
Inventor 张继中
Owner SOUTHEAST UNIV
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