Preparation method of ultrahigh-conductivity graphene modified polymethyl methacrylate composite material
A polymethyl methacrylate and graphene modification technology, applied in the field of nanocomposite materials, can solve the problems of long process flow, complicated operation, unable to meet the actual needs of industrial applications, etc., and achieves short preparation process, simple operation, good quality The effect of industrial application value
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Embodiment 1
[0023] Mix 2g of expanded graphite, 350mL of concentrated sulfuric acid, and 2g of potassium permanganate into a 500mL three-necked flask, and react at 35°C for 1 hour to obtain expanded graphite (EGIC) with a low degree of oxidation.
[0024] Take half of the above EGIC and add it into a three-necked flask containing a mixed solvent of 50 mL deionized water and 100 mL ethanol, and stir at 62°C. Then add 2.5mL of silane coupling agent MPS into 40mL of deionized water with pH=4 and stir for hydrolysis. After MPS is hydrolyzed, add it to the mixed solution of EGIC above and continue to react at 62°C for 2h. The product was washed with 100mL and 200mL deionized water and then filtered to obtain the modified mEGIC
[0025] Add 0.5 g of the above-mentioned mEGIC, 30 g of MMA, and 0.15 g of BPO into a 500 mL three-neck flask containing 100 mL of NMP solvent, and stir for 1 h at room temperature and under the protection of nitrogen. Then, the temperature was raised to 80° C. and the...
Embodiment 2
[0028] Mix 2g of expanded graphite, 350mL of concentrated sulfuric acid, and 2g of potassium dichromate into a 500mL three-necked flask, and react at 35°C for 1 hour to obtain slightly oxidized expanded graphite (EGIC).
[0029] Take half of the above EGIC and add it into a three-necked flask containing a mixed solvent of 50 mL deionized water and 100 mL ethanol, and stir at 62°C. Then add 2.5mL of silane coupling agent (vinyltrimethoxysilane) into 40mL of deionized water with pH=4 and stir for hydrolysis. Continue to react for 2h. The product was washed with 100mL and 200mL deionized water and then filtered to obtain the modified mEGIC
[0030] Add 0.5 g of the above-mentioned mEGIC, 30 g of MMA, and 0.15 g of BPO into a 500 mL three-neck flask containing 100 mL of NMP solvent, and stir for 4 hours at room temperature under nitrogen protection. Then, the temperature was raised to 80° C. and the reaction was completed for 12 hours. The reacted product was poured into 500mL ...
Embodiment 3
[0033] 1) Mix 1g of expanded graphite, 200mL of concentrated sulfuric acid, and 1g of potassium permanganate into a 500mL three-necked flask, and react at 35°C for 1 hour to obtain slightly oxidized expanded graphite (EGIC).
[0034] 2) Add the above EGIC into a three-necked flask containing a mixed solvent of 50 mL deionized water and 100 mL ethanol, and stir at 62 °C. Then add 3 mL of silane coupling agent (vinyl tris(2-methoxyethoxy) silane) into 50 mL of deionized water with pH=5 and stir for hydrolysis. After the silane coupling agent is hydrolyzed, add it to the mixing The reaction was continued at 62 °C for 2 h in the solution. After the product was washed with 100mL and 200mL deionized water, the modified mEGIC
[0035] 3) Add 1 g of the above-mentioned mEGIC, 30 g of MMA, and 0.15 g of BPO into a 500 mL three-neck flask containing 100 mL of NMP solvent, and stir for 5 h at room temperature and under nitrogen protection. Then, the temperature was raised to 80° C. for...
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