Sulfonic group functionalized graphene dispersion system and preparation method thereof
A dispersion system, sulfonic acid-based technology, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as easy agglomeration, achieve good stability and solve the effect of agglomeration
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[0031] In another typical embodiment of the present application, a method for preparing a sulfonic acid group functionalized graphene dispersion system is provided, comprising the following steps:
[0032] S1: disperse the sulfonic acid group functionalized graphene in an organic solvent to obtain a sulfonic acid group functionalized graphene dispersion;
[0033] S2: adding nanocellulose into the sulfonic acid functionalized graphene dispersion obtained in step S1, stirring in a water bath and ultrasonically dispersing to obtain a sulfonic acid functionalized graphene dispersion system.
[0034] The preparation method is simple to operate, and a stable sulfonic acid functionalized graphene dispersion system can be obtained only through simple steps of mixing, stirring in a water bath and ultrasonic dispersion.
[0035]In order to further improve the stability of the obtained sulfonic acid functionalized graphene dispersion system, before adding the nanocellulose into the sulfo...
Embodiment 1
[0048] A kind of preparation method of sulfonic acid functionalized graphene dispersion system, comprises the following steps:
[0049] (1) Add the sulfonic acid group functionalized graphene powder into N-methylpyrrolidone, mechanically stir for 20min and then ultrasonically vibrate for 2h to obtain a sulfonic acid group functionalized graphene-N-methylpyrrolidone dispersion, wherein The massfraction of sulfonic acid functionalized graphene is 10%;
[0050] (2) Dissolve 1g of nanocellulose particles in 90g of water, stir in a water bath at a constant temperature of 45°C for 12h until completely dissolved, then add 2mL of KH560 silane coupling agent to modify the surface of nanocellulose, and then ultrasonically disperse for 2h to obtain a mass fraction of 1% modified nanocellulose aqueous solution, and then filtered, washed, and dried to obtain modified nanocellulose;
[0051] (3) Slowly add the modified nanocellulose into the sulfonic acid group functionalized graphene-N-me...
Embodiment 2
[0054] A kind of preparation method of sulfonic acid functionalized graphene dispersion system, comprises the following steps:
[0055] (1) Add the sulfonic acid group functionalized graphene powder into acetone, and then carry out ultrasonic dispersion for 2h to obtain a sulfonic acid group functionalized graphene-acetone solution, wherein the mass fraction of the sulfonic acid group functionalized graphene is 10% ;
[0056] (2) Dissolve 2g of nanocellulose particles in 98g of water, stir in a water bath at a constant temperature of 45°C for 12h until completely dissolved, then add 2mL of KH1770 silane coupling agent to modify the surface of nanocellulose, and then ultrasonically disperse for 2h to obtain the mass fraction 2% modified nanocellulose aqueous solution, and then filtered, washed and dried to obtain modified nanocellulose;
[0057] (3) Slowly add the modified nanocellulose into the sulfonic acid group functionalized graphene-acetone solution, control the addition...
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