Multilayer functionalized graphene nanometer hybrid material utilizing polystyrene as hinge and preparation method thereof
A nano-hybrid material and polystyrene technology, applied in the field of material preparation, can solve the problems of numerous steps, cumbersome operations, and high reaction temperature, and achieve the effects of improving thermal stability, protecting the environment, and improving similar compatibility.
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preparation example Construction
[0030] Such as figure 1 Shown, a kind of polystyrene (PS) is the multilayer functionalized graphene nano-hybrid material of hinge and one-pot preparation method thereof, and this method comprises the following steps:
[0031] Step 1, adopt the improved Hummers method to prepare graphite oxide solid with natural flake graphite powder;
[0032] Step 2, under ultrasonication for 3-10 hours, prepare graphene oxide DMF suspension, the ratio of graphite oxide and DMF solvent is 7.5-15 mg / mL;
[0033] Step 3. Add excess thionyl chloride to the graphene oxide DMF suspension and react at 70-90°C for at least one day, then distill under reduced pressure to remove excess SOCl 2 Obtained afterwards, wherein the ratio of graphite oxide to thionyl chloride is not more than 10mg / mL (GOCl);
[0034] Step 4, prepare the DMF solution of CDs and PS, the mass ratio of CD and PS is (50:1)~(1:50); the ratio of CDs and DMF is 0.67~120mg / mL;
[0035] Step 5, mix the GOCl obtained in step 3 with th...
Embodiment 1
[0038] The first step, the preparation of graphite oxide solid;
[0039] Pre-oxidize 20 g of natural graphite (400 mesh) with 30 mL of concentrated sulfuric acid, 10 g of potassium persulfate and 10 g of phosphorus pentoxide at 80°C, wash with water until pH = 7, and dry at room temperature overnight for use;
[0040]Cool 460mL of concentrated sulfuric acid to about 0°C, then add 20g of pre-oxidized graphite into it, slowly add 60g of potassium permanganate so that the temperature of the system does not exceed 20°C, after the addition is completed, raise the temperature to 35°C, and stir for 2 hours, And slowly add 920mL of deionized water in batches, so that the system temperature does not exceed 98°C, and after stirring for 15 minutes, add 2.8L of deionized water and 50mL of 30% hydrogen peroxide. The resulting bright yellow suspension was filtered under reduced pressure and washed. Until there is no sulfate ion in the filtrate, and when it is neutral, the product is dried ...
Embodiment 2
[0049] The first to third steps are the same as steps one to three in Example 1.
[0050] Step 4: Weigh 0.2g α-cyclodextrin (β-CDs) and 0.2g PS into 30mL DMF and stir until completely dissolved to prepare a DMF solution of CDs / PS;
[0051] The fifth to sixth steps are the same as steps five to six in Example 1.
[0052] Infrared spectrum such as figure 2 f shows that the nano-hybrid material has been successfully synthesized.
[0053] Its thermal stability is as image 3 As shown in a, in the figure, the thermal stability of functionalized graphene nanohybrid materials is higher than that of unmodified graphene oxide, as well as intermediate products.
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