A kind of solvent-resistant separation membrane material and preparation method thereof
A separation membrane and solvent-resistant technology, which is applied in the direction of semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the problem of few solvent-resistant polymer membranes, and achieve the effect of promoting development and reducing costs
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Embodiment 1
[0027] 18 grams of polyethersulfone and 5 grams of polyetherimide were dissolved in a mixed solvent of 75 grams of dimethylacetamide and 8 grams of ethylene glycol at 100° C. under thorough stirring, and the proximity ratio α value of the solution was 0.35. After the polymer is completely dissolved, it is filtered through a stainless steel wire mesh with a pore size of 40 microns, and then placed in a hollow fiber tank with a temperature controlled at 50°C for defoaming. The membrane preparation parameters are: spinneret 0.8 / 1.3mm, air section height 45mm, temperature and humidity 30°C / 80%, spinning speed 12m / min, gel bath 30°C water. After the membrane is cured, it is cleaned and soaked in 1% glutaraldehyde aqueous solution for 30 minutes. Then take it out and drip dry, put it into an oven at 75°C for cross-linking for 25 minutes. The pure water permeability of the measured membrane is 357L m -2 ·hr -1 · bar -1 ;Transmittance tested by ethanol is 2250L·m -2 ·hr -1 · bar...
Embodiment 3
[0031] 18 grams of polyethersulfone and 15 grams of polyimide were dissolved in 65 grams of nitrogen methylpyrrolidone and 25 grams of PEG400 mixed solvent at 120° C. under thorough stirring, and the proximity ratio α value of the solution was 0.5. After the polymer is completely dissolved, it is filtered through a stainless steel mesh with a pore size of 40 microns and left to defoam. Using a stainless steel spatula with a thickness of 300 microns, the polymer solution was applied to a glass plate, placed in air (22°C, relative humidity 55%) for about 2 seconds, then immersed in 30°C water for phase separation and solidification. After the membrane material is completely cured, take out the membrane material for further cleaning. After cleaning, soak in 1% glutaraldehyde aqueous solution for 30 minutes. Then take it out and drip dry, put it into an oven with a temperature of 65°C for cross-linking for 60 minutes. The pure water permeability of the measured membrane is 207L ...
Embodiment 4
[0033] 12 grams of polyvinyl chloride and 5 grams of polyamide were dissolved in a mixed solvent of 65 grams of nitrogen methylpyrrolidone and 8 grams of propanol at 60°C with sufficient stirring, and the proximity ratio α value of the solution was 0.8. After the polymer is completely dissolved, it is filtered through a stainless steel mesh with a pore size of 40 microns and left to defoam. Using a stainless steel spatula with a thickness of 300 microns, the polymer solution was applied to a glass plate, placed in air (25°C, relative humidity 80%) for about 2 seconds, then immersed in 70°C water for phase separation and solidification. After the membrane material is completely cured, take out the membrane material for further cleaning. After cleaning, soak in 1% maleic anhydride aqueous solution for 20 minutes. Then take it out and drip dry, put it into an oven with a temperature of 100°C for cross-linking for 30 minutes. The pure water permeability of the measured membrane ...
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