Method for preparing high-strength conductive graphene fiber by large-size graphene oxide sheet
A technology of graphene sheet and conductive graphite, which is applied in the direction of graphene, fiber chemical characteristics, rayon chemical post-treatment, etc., can solve the problems of uneven size of graphene oxide, affecting the performance of graphene materials, etc., and achieves simple and good operation. Strength and toughness, the effect of a wide range of raw material sources
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[0018] The preparation method of high-strength macro graphene conductive fiber of the present invention comprises the following steps:
[0019] 1. Mix 1 part by weight of expanded graphite raw material, 1-100 parts by weight of sulfuric acid, 0.5-5 parts by weight of potassium persulfate and 0.5-5 parts by weight of phosphorus pentoxide, and stir and react at 25-100 °C for 1-10 hours , after cooling to room temperature, dilute with deionized water, filter with filter membrane, wash with deionized water until neutral, and dry naturally for 10-50 hours to obtain intercalated graphite.
[0020] The particle size of the expanded graphite is 100-500 microns, and the sulfuric acid is sulfuric acid with a mass concentration greater than 80%.
[0021] 2. Mix 1 part by weight of the intercalated graphite obtained in step 1, 1~100 parts by weight of sulfuric acid and 0.5~10 parts by weight of potassium permanganate, stir and react at -10~50°C for 0.1~10 hours, then add 10 ~2000 parts b...
Embodiment 1
[0035] Step (a): Add 10g of expanded graphite, 10g of 90% sulfuric acid, 1g of potassium persulfate and 1g of phosphorus pentoxide into the reaction flask, stir and react at 80°C for 5 hours, cool to room temperature, and use deionized Dilute with water, filter with filter membrane, wash the filter cake repeatedly with deionized water until neutral, dry naturally for 10 hours to obtain intercalated graphite;
[0036] Step (b): Add 5g of the intercalated graphite product obtained in step (a), 20g of 80% sulfuric acid and 2.5g of potassium permanganate to the reaction bottle, stir and react at 50°C for 2 hours, then add 1kg of deionized Water and 0.5g of 30% hydrogen peroxide were stirred for 10 hours, filtered through a filter membrane, and the filter cake was repeatedly washed with deionized water to neutrality, and dried naturally to obtain preliminary graphite oxide;
[0037] Step (c): Add 2g of the preliminary graphite oxide product obtained in step (b), 20g of 90% sulfuric...
Embodiment 2
[0044] Step (a): Add 10g of expanded graphite, 100g of 90% sulfuric acid, 50g of potassium persulfate and 50g of phosphorus pentoxide into the reaction flask, stir and react at 80°C for 5 hours, cool to room temperature, and use Dilute with deionized water, filter with filter membrane, wash the filter cake repeatedly with deionized water until neutral, dry naturally for 10 hours to obtain intercalated graphite;
[0045] Step (b): Add 5g of the intercalated graphite product obtained in step (a), 300g of 90% sulfuric acid and 50g of potassium permanganate into the reaction bottle, stir and react at 50°C for 2 hours, then add 1kg of deionized water Stir with 30% hydrogen peroxide of 30g for 10 hours, filter with filter membrane, wash the filter cake repeatedly with deionized water to neutrality, and dry naturally to obtain preliminary graphite oxide;
[0046] Step (c): Add 2g of the preliminary graphite oxide product obtained in step (b), 300g of 90% sulfuric acid, 20g of potassi...
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