Biomass-based carbon nanomaterial/polysulfone ultrafiltration membrane and preparation method thereof
A technology of carbon nanomaterials and polysulfone ultrafiltration membranes, applied in ultrafiltration, chemical instruments and methods, membranes, etc., to achieve the effect of increasing application range, large application prospects, and good dispersibility
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Embodiment 1
[0050] A preparation method of biomass-based carbon nanomaterial / polysulfone ultrafiltration membrane, comprising the following steps,
[0051] Step a, taking powdery biomass rich in carbon sources, cleaning, removing impurities, and blast drying;
[0052] Step b, taking the dried biomass in step a, adding it to concentrated sulfuric acid, stirring, and cooling naturally to obtain a carbon nanomaterial reaction solution;
[0053] Step c, diluting the carbon nanomaterial reaction solution, centrifuging to obtain the bottom product;
[0054] Step d, use deionized water and ethanol to wash the bottom product to neutrality, add N,N-dimethylformamide (DMF) to the neutral product, ultrasonically oscillate, centrifuge, take the upper black solution to obtain carbon Nanomaterial / DMF solution;
[0055] Step e, drying the polysulfone particles, adding pure DMF and the carbon nanomaterial / DMF solution, stirring until completely dissolved, standing for defoaming, and obtaining a casting s...
Embodiment 2
[0059] A preparation method of biomass-based carbon nanomaterial / polysulfone ultrafiltration membrane, comprising the following steps,
[0060] Step 1, washing the straw powder with deionized water to remove water-soluble impurities therein, and drying in a blast drying oven at 20-80°C for 8-36 hours;
[0061] Step 2, adding the dried straw powder into concentrated sulfuric acid, stirring at 20-100°C for 2-6 hours, and cooling naturally to obtain a carbon nanomaterial reaction solution;
[0062] Step 3, diluting the carbon nanomaterial reaction solution by 1 to 5 times, and centrifuging at 1000 to 8000 rpm for 0 to 30 minutes to obtain a bottom product;
[0063] Step 4. Wash the bottom product with deionized water and ethanol until neutral, add DMF to the neutral product, ultrasonically oscillate for 0-30 minutes, centrifuge at 1000-8000 rpm for 0-30 minutes, take the upper black solution, and obtain carbon nanomaterials / DMF solution;
[0064] Step 5. Dry the polysulfone par...
Embodiment 3
[0068] A preparation method of biomass-based carbon nanomaterial / polysulfone ultrafiltration membrane, comprising the following steps,
[0069] Step 1, corn stalk powder (such as figure 1 shown) was washed three times with deionized water to remove water-soluble impurities therein, and dried at 60° C. for 24 hours in a blast drying oven;
[0070] Step 2, taking 0.6 g of dried corn stalk powder and adding it to 50 ml of concentrated sulfuric acid, stirring at 100° C. for 6 hours, and cooling naturally to obtain a carbon nanomaterial reaction solution;
[0071] Step 3, diluting the carbon nanomaterial reaction solution 5 times, and centrifuging at 5000rpm for 10min to obtain the bottom product;
[0072] Step 4, wash the bottom product with deionized water and ethanol until it is neutral, add DMF to the neutral product, ultrasonically oscillate for 10 minutes, and centrifuge at 5000 rpm for 10 minutes, take the upper black solution to obtain a carbon nanomaterial / DMF solution, s...
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