A kind of preparation method of graphene skeleton porous nanofiber
A graphene skeleton and nanofiber technology, applied in fiber treatment, fiber chemical characteristics, artificial filament heat treatment, etc., can solve the problems of low porosity, poor fiber shape, etc., and achieve low cost, high thermal stability, and easy access to raw materials Effect
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example 1
[0019] Prepare water-soluble metal salt ferric citrate and a certain amount of distilled water to prepare an aqueous solution, add polyvinyl alcohol under high-speed stirring, and stir for 2 hours at 90°C to prepare a uniform solution, wherein the ratio of polyvinyl alcohol to water is 6:94, The mass ratio of ferric citrate to polyvinyl alcohol is 3:1. Electrospinning was carried out after the obtained spinning solution was left to stand for 2 hours. The parameters of the electrospinning process were: voltage 30kV, distance 20cm, ambient temperature 25°C, humidity 30%. The obtained composite nanofibers were treated in argon at 800° C. for 1 h, and after taking them out, the template was washed away with a mixture of dilute hydrochloric acid and dilute nitric acid, and dried to obtain porous nanofibers with a graphene skeleton structure. The obtained nanofiber has a diameter of 456nm, a porosity of 81%, and a specific surface area of 823m 2 / g, the mesoporosity is 62%.
example 2
[0021] Prepare water-soluble metal salt nickel nitrate and a certain amount of distilled water into an aqueous solution, add polyvinylpyrrolidone under high-speed stirring, and stir at 60°C for 5 hours to prepare a uniform solution, wherein the ratio of polyvinylpyrrolidone to water is 7:90, nitric acid The mass ratio of nickel to polyvinylpyrrolidone is 1:1. Electrospinning was carried out after the obtained spinning solution was left to stand for 10 hours. The parameters of the electrospinning process were: voltage 15kV, distance 10cm, ambient temperature 30°C, humidity 60%. The obtained composite nanofibers were treated in nitrogen at 1000° C. for 5 hours, and after taking out, the templates were washed away with dilute nitric acid, and dried to obtain porous nanofibers with a graphene skeleton structure. The obtained nanofibers have an average diameter of 305nm, a porosity of 44%, and a specific surface area of 202m 2 / g, the mesoporosity is 60%.
example 3
[0023] Prepare 20nm magnesium oxide and a certain amount of distilled water into a water suspension, add polyvinylpyrrolidone under high-speed stirring, and stir for 5 hours at 60°C to prepare a uniform solution, wherein the ratio of polyvinylpyrrolidone to water is 8:92, oxidized The mass ratio of magnesium to polyethylpyrrolidone is 4:1. Electrospinning was carried out after the obtained spinning solution was left to stand for 5 hours. The parameters of the electrospinning process were: voltage 25kV, distance 15cm, ambient temperature 27°C, humidity 60%. The obtained composite nanofibers were treated in helium at 1500° C. for 1 h, and after taking them out, the templates were washed away with dilute sulfuric acid, and dried to obtain porous nanofibers with a graphene skeleton structure. The obtained nanofibers have an average diameter of 320nm, a porosity of 74%, and a specific surface area of 680m 2 / g, the mesoporosity is 91%.
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