Preparation method for strength-reinforced anti-microbial hollow fiber separating membrane
A fiber separation and fiber membrane technology, applied in semipermeable membrane separation, chemical instruments and methods, membrane technology, etc.
Inactive Publication Date: 2015-03-25
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Problems solved by technology
The invention discloses a preparation method for a strength-reinforced anti-microbial hollow fiber separating membrane. The preparation method comprises the following steps: (1) preparing a casting liquid, namely mixing polyether sulfone, thermoplastic polyurethane, polyethylene glycol, sodium dodecyl sulfate, lithium chloride and an organic solvent in ratio by weight of (10-30) : (1-6) : (2-12) : (1-2) : (1-20) : (60-90) to a reaction kettle, heating, thermally stirring and dissolving for 10-12 hours; after the raw materials are dissolved, standing till the temperature is up to the room temperature, and adding a certain quantity of quaternary ammonium salt-acrylonitrile copolymer; starting stirring, mixing uniformly, and filtering, defoaming and purifying the obtained liquid; (2) manufacturing a hollow fiber membrane, namely extruding the prepared membrane manufacturing liquid to a spinning nozzle by utilizing a metering pump, and extruding a core liquid quantitatively to an inner needle of the spinning nozzle through the metering pump; spinning by the spinning nozzle, feeding the spun fibers to sequentially pass through a coagulating bath to be cooled and coagulated and a stretching groove to be subjected to post-treatment under the action of a fraction wheel, so as to obtain the hollow fiber membrane.
Dodecylsulfonic acidThermoplastic polyurethane +15
- Experimental program(3)
|Breaking strength||2.5 ~ 3.0||MPa|
|Pure water flux||1500.0 ~ 2500.0||h·l/m²|
|Average pore size||0.1||µm|
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