A kind of preparation method of fiber membrane for oil-water separation
An oil-water separation and nanofiber membrane technology, applied in the fields of electrospinning and environmental protection, can solve the problems of low efficiency, poor separation effect, and single oil-water separation performance, and achieve a large adsorption capacity, small volume, and large specific surface area. Effect
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Embodiment 1
[0020] Example 1: 5wt% SiCDs / SiO 2 Preparation of nanofibrous membranes
[0021] (1) Organosilane carbon dots (SiCDs) were synthesized by chemical hydrothermal synthesis. Dissolve 0.5g of anhydrous citric acid (CA) in distilled water, add 10mL of N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane (AEAPMS) and mix well, then add to the autoclave , the heating temperature was 180°C, and the heating time was 12h; the SiCDs solution was extracted and purified using a 5:1 (V / V) mixture of petroleum ether and ethyl acetate, and extracted three times; the SiCDs solution was extracted using a vacuum rotary evaporator. Concentrate and remove excess solvent to obtain organosilane carbon dots (SiCDs).
[0022] (2) Add 40.375mL of MTES solution and 80mL of absolute ethanol into a beaker, stir at room temperature, and mix thoroughly to form a MTES / ethanol solution;
[0023] (3) Divide 20mL of acetic acid aqueous solution with a pH value of 2.5 into 3 parts, and add each part to the MTE...
Embodiment 2
[0028] Example 2: 10wt% SiCDs / SiO 2 Preparation of nanofibrous membranes
[0029] (1) Organosilane carbon dots (SiCDs) were synthesized by chemical hydrothermal synthesis. Dissolve 0.5g of anhydrous citric acid (CA) in distilled water, add 10mL of N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane (AEAPMS) and mix well, then add to the autoclave , the heating temperature was 180°C, and the heating time was 12h; the SiCDs solution was extracted and purified using a 5:1 (V / V) mixture of petroleum ether and ethyl acetate, and extracted three times; the SiCDs solution was extracted using a vacuum rotary evaporator. Concentrate and remove excess solvent to obtain organosilane carbon dots (SiCDs).
[0030] (2) Add 38.25mL of MTES solution and 80mL of absolute ethanol into a beaker, stir at room temperature, and mix thoroughly to form a MTES / ethanol solution;
[0031] (3) Divide 20mL of acetic acid aqueous solution with a pH value of 2.5 into 3 parts, and add each part to the MTE...
Embodiment 3
[0036] Example 3: 20wt% SiCDs / SiO 2 Preparation of nanofibrous membranes
[0037] (1) Organosilane carbon dots (SiCDs) were synthesized by chemical hydrothermal synthesis. Dissolve 0.5g of anhydrous citric acid (CA) in distilled water, add 10mL of N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane (AEAPMS) and mix well, then add to the autoclave , the heating temperature was 180°C, and the heating time was 12h; the SiCDs solution was extracted and purified using a 5:1 (V / V) mixture of petroleum ether and ethyl acetate, and extracted three times; the SiCDs solution was extracted using a vacuum rotary evaporator. Concentrate and remove excess solvent to obtain organosilane carbon dots (SiCDs).
[0038] (2) Add 34mL of MTES solution and 80mL of absolute ethanol into a beaker, stir at room temperature, and mix thoroughly to form a MTES / ethanol solution;
[0039] (3) Divide 20mL of acetic acid aqueous solution with a pH value of 2.5 into 3 parts, and add each part to the MTES / e...
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