Hydrotrite inorganic-organic composite fiber membrane and preparation method thereof
A composite fiber membrane and hydrotalcite technology, applied in the direction of inorganic chemistry, chemical instruments and methods, and other chemical processes, can solve the problems of easy loss and blockage, difficult separation and recovery, etc., to achieve easy loss, excellent pore structure, The effect of novel material structures
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Embodiment 1
[0021] (1) Measure 10mL N,N-dimethylformamide, add 0.8g polyacrylonitrile and 0.16g AlOOH to it to make a solution; transfer the solution to a syringe, set the electric field voltage to 18kV, and the receiving distance to 15cm , the flow rate of the precursor solution was 1.5mL / h; the fiber membrane obtained by spinning was dried in a vacuum oven at 60°C for 8h.
[0022] (2) prepare the mixed salt solution of magnesium chloride and aluminum chloride, Mg 2+ and Al 3+ The molar ratio of Mg is 1:3, 2+ The concentration of urea is 0.015mol / L, the amount of urea is twice the amount of chloride ion in the solution, stirred for 10min, and injected into the polytetrafluoroethylene reactor; Put a square with a length of 5 cm into the reaction kettle, and conduct a hydrothermal reaction at 140°C for 8 hours; take out the membrane after cooling to room temperature, rinse it with deionized water, place it in a beaker filled with deionized water, clean it ultrasonically for 15 minutes, a...
Embodiment 2
[0024] (1) Measure 10mL of N,N-dimethylformamide, add 1.2g of polyimide and 0.2g of AlOOH to it to prepare a solution; transfer the solution to a syringe, set the electric field voltage to 20kV, and the receiving distance to be The flow rate of the precursor solution was 1.0mL / h; the fiber membrane obtained by spinning was dried in a vacuum oven at 60°C for 8h.
[0025] (2) prepare the mixed salt solution of zinc nitrate and aluminum nitrate, Zn 2+ and Al 3+ The molar ratio of Zn is 1:2, Zn 2+ The concentration of urea is 0.01mol / L, the amount of urea is 4 times the amount of nitrate in the solution, stirred for 15min, and injected into the polytetrafluoroethylene reactor; Put a 10cm-long square into the reaction kettle, and conduct a hydrothermal reaction at 100°C for 18 hours; take out the membrane after cooling to room temperature, rinse it with deionized water, place it in a beaker filled with deionized water, and ultrasonically clean it for 15 minutes, then wash it with...
Embodiment 3
[0027] (1) Measure 10mL of a mixed solvent of N,N-dimethylformamide and acetone (volume ratio 6:4), add 1.5g polyvinylidene fluoride and 0.5g AlOOH to it to prepare a solution; transfer the solution to In the syringe, set the electric field voltage to 17kV, the receiving distance to 18cm, and the flow rate of the precursor solution to 1.0mL / h; the fiber membrane obtained by spinning was dried in a vacuum oven at 60°C for 8h.
[0028] (2) prepare the mixed salt solution of magnesium nitrate and aluminum nitrate, Mg 2+ and Al 3+ The molar ratio of Mg is 1:2, 2+ The concentration of urea is 0.02mol / L, the amount of urea is 3 times of the amount of nitrate in the solution, stirred for 20min, and injected into the polytetrafluoroethylene reactor; cutting the polyvinylidene fluoride fiber membrane doped with AlOOH is A square with a side length of 20cm was added to the reaction kettle, and the hydrothermal reaction was carried out at 120°C for 12 hours; after cooling to room tempe...
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