Polyvinylidene fluoride and metal-organic framework composite ultra-filtration membrane and preparation and application
A technology of metal organic framework and polyvinylidene fluoride, which is applied in ultrafiltration, membrane, membrane technology, etc., to achieve the effects of improving anti-pollution ability, convenient operation and low production cost
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Embodiment 1
[0033] (1) Preparation of metal-organic framework MIL-100(Fe): Weigh 277.5 mg of iron powder (purity>99%, 300 mesh), 687.5 mg of 1,3,5-benzenetricarboxylic acid (melting point>300°C, purity >98% white powder) into the polytetrafluoroethylene liner, add 20mL high-purity water, then add dropwise 200μL hydrofluoric acid (35wt%) and 190μL nitric acid (65wt%) to mix well, cover and move to the inner liner After the PTFE stainless steel reaction kettle was sealed, it was placed in an electric blast constant temperature drying oven at 150°C for 12 hours. The product was washed with ethanol and high-purity water, and dried by high-speed centrifugation. The finally obtained orange-yellow solid was vacuum-dried at 100° C. for 12 h to obtain a metal-organic framework MIL-100(Fe).
[0034] (2) Configure the casting solution: add 2wt% of MIL-100(Fe) to 77wt% of N-methylpyrrolidone, ultrasonically disperse at an ultrasonic frequency of 50kHz for 30min, and then add 20wt% of the dried polyv...
Embodiment 2
[0038] (1) Preparation of metal-organic framework MIL-100(Fe): Weigh 277.5 mg of iron powder (purity>99%, 300 mesh), 687.5 mg of 1,3,5-benzenetricarboxylic acid (melting point>300°C, purity >98% white powder) into the polytetrafluoroethylene liner, add 20mL high-purity water, then add 200μL hydrofluoric acid (35wt%) and 190μL nitric acid (65wt%) dropwise, mix well, cover and move to a stainless steel reaction kettle After inner sealing, place in an electric blast constant temperature drying oven to react at 150°C for 12h. The product was washed with ethanol and high-purity water, and dried by high-speed centrifugation. The finally obtained orange-yellow solid was vacuum-dried at 100° C. for 12 h to obtain a metal-organic framework MIL-100(Fe).
[0039] (2) Configure the casting solution: add 0.25wt% of MIL-100 (Fe) to 83.5wt% of N-methylpyrrolidone, ultrasonically disperse at an ultrasonic frequency of 50kHz for 30min, and then add 16wt% of the dried poly Vinylidene fluoride...
Embodiment 3
[0043] (1) Preparation of metal-organic framework MIL-100(Fe): Weigh 277.5 mg of iron powder (purity>99%, 300 mesh), 687.5 mg of 1,3,5-benzenetricarboxylic acid (melting point>300°C, purity >98% white powder) into the polytetrafluoroethylene liner, add 20mL high-purity water, then add 200μL hydrofluoric acid (35wt%) and 190μL nitric acid (65wt%) dropwise, mix well, cover and move to a stainless steel reaction kettle After inner sealing, place in an electric blast constant temperature drying oven to react at 150°C for 12h. The product was washed with ethanol and high-purity water, and dried by high-speed centrifugation. The finally obtained orange-yellow solid was vacuum-dried at 100° C. for 12 h to obtain a metal-organic framework MIL-100(Fe).
[0044] (2) Configure the casting solution: add 1wt% of MIL-100(Fe) to 80.5wt% of N-methylpyrrolidone, ultrasonically disperse at an ultrasonic frequency of 50kHz for 30min, and then add 18wt% of the dried poly Vinyl fluoride and 0.5 wt...
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