Preparation method for graphene and graphite core sheath structured fiber
A technology of structural fiber and graphite core, which is applied to the chemical characteristics of fibers, textiles and papermaking, chemical post-treatment of rayon, etc., can solve the problems of damage, graphene conductivity decline, and difficulty in recovery, etc., to achieve good and high conductivity The effect of sex and simple steps
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[0027] The preparation method of the present invention comprises the following steps:
[0028] 1) Put graphitized carbon fiber in a mixture of strong acid and strong oxidant, stir at 50°C-100°C for 0-24h, cool to room temperature, dilute with deionized water, take out graphitized carbon fiber, place in deionized water Wash until neutral, dry at room temperature for 24-72h, this step is pre-oxidation.
[0029] 2) Put the product obtained in step 1 into a mixture of strong acid and strong oxidant, stir at 0-50°C for 4-24 hours, then take out the product and place it in water or steam atmosphere for 4-12 hours to deionize After repeated washing with water, the value is neutral, and dried at 40°C-80°C to obtain graphite oxide graphite core-sheath fiber.
[0030] The strong acid is one or more of concentrated sulfuric acid, concentrated nitric acid and perchloric acid.
[0031] The strong oxidant is one or more of potassium permanganate, potassium persulfate, sodium chlorate and ...
Embodiment 1
[0036] 1) Cut the carbon paper into 2.5cm*2.5cm size, put it into 24mL of 98% concentrated sulfuric acid, 5g potassium persulfate and 5g phosphorus pentoxide mixture, keep it at 80℃ for 18h, cool to room temperature, take out The carbon paper was washed in deionized water, and dried naturally at room temperature for 24 hours to obtain preoxidized carbon paper.
[0037] 2) Put the pre-oxidized carbon paper obtained in step 1 into 40mL of 98% concentrated sulfuric acid and 5g potassium permanganate mixture at 0°C, heat it to 35°C and keep it for 10h, take out the carbon paper and place it After 12 hours in a water vapor atmosphere at 40°C, it was repeatedly washed with deionized water until neutral, and dried in an oven at 60°C to obtain a graphite oxide graphite core-sheath fiber.
[0038] 3) Quickly put the graphite oxide graphite core-sheath structure fiber obtained in step 2 into a tube furnace preheated to 300°C. The tube furnace is filled with inert gas nitrogen or argon f...
Embodiment 2
[0043] Example 1 was repeated, with the following differences: during pre-oxidation in step 1, the carbon paper was kept at 80° C. for 24 hours in a concentrated sulfuric acid mixture; in step 2, the oxidation process was kept at 35° C. for 6 hours; the obtained results were the same as in Example 1 resemblance.
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