Preparation method of water purification nanofiltration membrane
A nanofiltration membrane and water purification technology, which is applied in the field of nanofiltration membrane preparation, can solve the problems of low calcium and magnesium ion removal rate and low separation efficiency, and achieve the effects of broad application prospects, simple process and low cost
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0028] Mix polysulfone, polydimethylaminoethyl methacrylate, polyethylene glycol and N-methylpyrrolidone according to the concentration requirements of the corresponding numbers in Table 1.1, and fully dissolve them through mechanical stirring to obtain a polymer solution; Add a crosslinking agent (that is, 0%) to the polymer solution, and stir at 40°C for 1 hour; continue to add 0.5% methyl iodide to the polymer solution, and react at 30°C for 0.5h to obtain a casting solution. The casting solution was extruded through a spinning machine, passed through a heating section at 120° C. for 3 seconds, and then immersed in a coagulation bath of pure water (solvent volume percentage: 0%) to solidify and form to obtain a hollow fiber nanofiltration membrane for household water purification. To test its water flux, the CaCl 2 The removal rate is shown in Table 1.2.
[0029] Table 1.1 Preparation conditions of polysulfone / polydimethylaminoethyl methacrylate nanofiltration membrane
...
Embodiment 2
[0041] Mix polyethersulfone, tetraethylenepentamine, polyethylene glycol and N,N-dimethylformamide according to the concentration requirements of the corresponding numbers in Table 2.1, and fully dissolve them by mechanical stirring to obtain a polymer solution; Add 5% ethylene glycol diglycidyl ether to the polymer solution, stir at 70°C for 5h; continue to add 0.5% methyl iodide to the polymer solution, react at 80°C for 2h to obtain a casting solution. Extrude the casting solution through a spinning machine, pass through a heating section at 120°C for 3 seconds, and then immerse it in a coagulation bath with a solvent volume percentage of 50% to solidify and form it to obtain a hollow fiber nanofiltration membrane for household water purification. To test its water flux, the CaCl 2 The removal rate is shown in Table 2.2.
[0042] Table 2.1 Preparation conditions of polyethersulfone / tetraethylenepentamine nanofiltration membrane
[0043]
[0044] Table 2.2 Performance d...
Embodiment 3
[0047] Mix polyacrylonitrile, polyethyleneimine, polyvinylpyrrolidone and N,N-dimethylformamide according to the concentration requirements of the corresponding numbers in Table 3.1, and fully dissolve them through mechanical stirring to obtain a polymer solution; Add 5% of 1,4-butanediol diglycidyl ether to the solution, stir at 90°C for 2 hours; continue to add 2% of 2,3-epoxypropyltrimethylammonium chloride to the polymer solution, React at 80°C for 2 hours to obtain a casting solution. The casting liquid is coated on the non-woven fabric by a coating machine, and after passing through the heating section at 60°C for 60s, it is immersed in a coagulation bath with a solvent volume percentage of 80% to solidify and form it to obtain a hollow fiber nanofiltration membrane for domestic water purification. To test its water flux, the CaCl 2 The removal rate is shown in Table 3.2.
[0048] Table 3.1 Preparation conditions of polyacrylonitrile / polyethyleneimine nanofiltration me...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More