Prepared carbon aerogel film and preparation method thereof
A carbon aerogel and aerogel technology, applied in the field of composite materials, can solve the problems of low strength and large thickness of the aerogel film, and achieve the effects of high flatness, high strength and obvious mesh structure
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Embodiment 1
[0033] Such as figure 1 As shown, the preparation method specifically includes the following steps:
[0034] Use the phenolic precursor solution of resorcinol + formaldehyde and the graphene oxide solution with a concentration of 0.2 mg / mL to mix according to the mass ratio of 5:1. After stirring evenly, a precursor solution is formed, and the precursor solution is placed in a water bath In the pot, heat at 40°C for 30 minutes to obtain a phenolic system microsol with a viscosity of 20 mPa·s.
[0035] Apply the microsol evenly on the glass slide, use the spin coater, set the rotation angular speed to 1000r / min, and the spin time to 30s, and coat the film. After the spin coater stops, the phenolic microsol film is obtained.
[0036] It was quickly placed in deionized water, sealed and stored at 70°C for 72 hours, and sol-gel reacted to obtain a phenolic hydrogel film. The phenolic hydrogel film was taken out, placed in an acetone solution, and the solvent was replaced, and th...
Embodiment 2
[0039] Use the phenolic precursor solution of resorcinol + formaldehyde and the graphene oxide solution with a concentration of 0.5 mg / mL to mix according to the mass ratio of 5:1. After stirring evenly, a precursor solution is formed, and the precursor solution is placed in a water bath In the pot, heat at 60° C. for 10 minutes to obtain a microsol with a viscosity of 20 mPa·s.
[0040] Apply the microsol evenly on the glass slide, use the spin coater, set the rotation angular speed to 1000r / min, and the spin time to 30s, and coat the film. After the spin coater stops, the phenolic microsol film is obtained.
[0041] Quickly place it in deionized water, store it sealed at 90°C for 12 hours, and undergo sol-gel reaction to obtain a phenolic hydrogel film. The phenolic hydrogel film was taken out, placed in an acetone solution, and the solvent was replaced, and the acetone was replaced once a day, for a total of 3 replacements, to obtain a phenolic ketone gel film. The phenoli...
Embodiment 3
[0044] Use the phenolic precursor solution of resorcinol + formaldehyde and the graphene oxide solution with a concentration of 0.2 mg / mL to mix according to the mass ratio of 10:1. After stirring evenly, a precursor solution is formed, and the precursor solution is placed in a water bath In a pot, heat at 50°C for 20 minutes to obtain a microsol with a viscosity of 30 mPa·s.
[0045] Apply the microsol evenly on the glass slide, use the spin coater, set the rotation angular speed to 1500r / min, and the spin time to 30s, and coat the film. After the spin coater stops, the phenolic microsol film is obtained.
[0046] It was quickly placed in deionized water, sealed and stored at 80°C for 72 hours, and sol-gel reacted to obtain a phenolic hydrogel film. The phenolic hydrogel film was taken out, placed in an acetone solution, and the solvent was replaced, and the acetone was replaced once a day, for a total of 3 replacements, to obtain a phenolic ketone gel film. The phenolic ket...
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