Composite carbon material membrane, composite carbon material nanofiltration membrane and preparation method
A composite carbon and material membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of unsuitable for large-scale industrial production, low water flux of nanofiltration membrane, complicated process, etc.
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[0031] In order to realize the large-scale preparation of a nanofiltration membrane including graphene oxide materials by a blade coating method, and at the same time improve the water flux of the nanofiltration membrane, the present invention provides a preparation method of a composite carbon material nanofiltration membrane, which comprises the following steps .
[0032] The graphene oxide and carboxylated carbon nanotubes are uniformly mixed in a dispersant to prepare a graphene oxide-carbon nanotube mixed solution.
[0033] The graphene oxide-carbon nanotube mixed solution is scraped on the base film, and the dispersant in the graphene oxide-carbon nanotube mixed solution is removed to prepare a composite carbon material film precursor, wherein the base film is an ultrafiltration base film .
[0034] The graphene oxide in the composite carbon material film precursor is reduced by means of ultraviolet light irradiation reduction.
[0035] It can be understood that in oth...
Embodiment 1
[0079] Add 50 μL of carboxylated carbon nanotube dispersion (0.5 g / L) into 300 mL of deionized water for ultrasonic dispersion for 30 min, and then add 400 μL of self-made graphene oxide aqueous dispersion (0.5 g / L), and mix well to obtain graphene oxide- Carbon nanotube mixture;
[0080] Using a stainless steel scraper, the graphene oxide-carbon nanotube mixed solution was evenly scraped on the polyvinylidene fluoride ultrafiltration base membrane, and left to stand at room temperature to evaporate the water therein to obtain a composite carbon material membrane precursor.
[0081] A 500W high-power mercury lamp was used to irradiate the composite carbon material membrane precursor for 5h, the entire film was shrouded in high-purity hydrogen, and the radiation source was 40cm away from the film to obtain a partially reduced nanofiltration membrane.
Embodiment 2
[0083] Add 100 μL of carboxylated carbon nanotube dispersion (0.5 g / L) to 300 mL of deionized water for ultrasonic dispersion for 30 min, and then add 400 μL of self-made graphene oxide aqueous dispersion (0.5 g / L), and mix well to obtain graphene oxide- Carbon nanotube mixture;
[0084] Using a stainless steel scraper, the graphene oxide-carbon nanotube mixed solution was evenly scraped on the polyvinylidene fluoride ultrafiltration base membrane, and left to stand at room temperature to evaporate the water therein to obtain a composite carbon material membrane precursor.
[0085] A 500W high-power mercury lamp was used to irradiate the composite carbon material membrane precursor for 5h, the entire film was shrouded in high-purity hydrogen, and the radiation source was 40cm away from the film to obtain a partially reduced nanofiltration membrane.
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