A kind of preparation method of high porosity mesoporous nano-graphene fiber
A nano-graphene, high-porosity technology, applied in the chemical characteristics of fibers, textiles and papermaking, etc., can solve the problems of limited porosity and specific surface area, no preparation, etc. Effect
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Embodiment 1
[0019] Take 1 g of alcohol-soluble first-stage resin (molecular weight: 500) and add 14 g of ethanol, stir until it dissolves, then add 4 g of magnesium nitrate 6 hydrate and 0.5 g of polyvinylpyrrolidone, and stir for 2 hours to obtain a spinning stock solution. Electrospinning was carried out at room temperature with the obtained spinning solution, the spinning voltage was 20 kV, the spinning distance was 15 cm, and the spinning was collected by a drum. The obtained fibers were cured in an oven at 80°C for 40 hours, then the cured fibers were placed in a carbonization furnace, and the temperature was raised to 1000°C at 1°C / min for 2 hours to obtain carbon composite nanofibers, and the obtained fibers were treated with dilute hydrochloric acid to obtain carbon nanofibers. The obtained carbon fiber has a graphene skeleton, a diameter of 256nm, a porosity of 84%, a mesoporosity of 87%, and a specific surface area of 954m 2 / g.
Embodiment 2
[0021] Take 1 g of alcohol-soluble first-stage resin (molecular weight 800) and add 7 g of ethanol, stir until it dissolves, then add 2 g of ferric chloride and 0.25 g of polyvinylpyrrolidone, and stir for 5 hours to obtain a spinning stock solution. Electrospinning was carried out at room temperature with the obtained spinning solution, the spinning voltage was 25kV, the spinning distance was 20cm, and the spinning was collected by a drum. The obtained fibers were cured in an oven at 100°C for 24 hours, then the cured fibers were placed in a carbonization furnace, and the temperature was raised to 1200°C at 3°C / min for 5 hours to obtain carbon composite nanofibers, and the obtained fibers were treated with dilute sulfuric acid to obtain carbon nanofibers. The obtained carbon fiber has a graphene skeleton, a diameter of 556nm, a porosity of 78%, a mesoporosity of 83%, and a specific surface area of 366m 2 / g.
Embodiment 3
[0023] Add 13 g of ethanol to 1 g of alcohol-soluble first-stage resin (molecular weight: 1000), stir until it dissolves, then add 1 g of nickel acetate and 1 g of polyvinylpyrrolidone, and stir for 4 hours to obtain a spinning stock solution. Electrospinning was carried out at room temperature with the obtained spinning solution, the spinning voltage was 18kV, the spinning distance was 12cm, and the spinning was taken up by a drum. The obtained fibers were cured in an oven at 150°C for 30 hours, then the cured fibers were placed in a carbonization furnace, and the temperature was raised to 1200°C at 5°C / min for 3 hours to obtain carbon composite nanofibers, and the obtained fibers were treated with dilute nitric acid to obtain carbon nanofibers. The obtained carbon fiber has a graphene skeleton, a diameter of 356nm, a porosity of 75%, a mesoporosity of 75%, and a specific surface area of 156m 2 / g.
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