Hollow fiber reverse osmosis membrane and preparation method thereof
A reverse osmosis membrane and fiber membrane technology, which is applied in reverse osmosis, semipermeable membrane separation, chemical instruments and methods, etc., can solve the problem of uneven distribution of monomers on the surface of hollow fiber membranes, hindering the development of hollow fiber reverse osmosis membrane modules, Membrane module selective layer defects and other issues
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[0033] It can be understood that the present invention is to achieve the purpose of the present invention through some embodiments, such as figure 1 As shown, the present invention provides a method for preparing a hollow fiber base membrane, comprising the following steps:
[0034] The casting material liquid is injected into the same spinneret 3 through the casting liquid pump 2, the core liquid is injected into the same spinneret 3 through the core liquid pump 1, and squeezed through the casting liquid port and the core liquid port of the spinneret 3. out of the hollow tubular liquid film; then, the liquid film passes through the air gap section 8 successively through the first phase change solidification bath 4 and the second phase change solidification bath 5, and then solidifies, and is soaked at a constant temperature to remove the solvent phase change into a hollow fiber The nanofiltration membrane filaments, and finally the hollow fiber nanofiltration membrane filamen...
Embodiment 1
[0080] This embodiment provides a preparation method of a hollow fiber reverse osmosis membrane, including: a preparation method of a hollow fiber base membrane and a preparation method of a hollow fiber reverse osmosis membrane.
[0081] (1) The preparation method of hollow fiber base membrane may further comprise the steps:
[0082] S1 Preparation of polyethersulfone-based membranes: weigh 24 parts of polyethersulfone, 30 parts of dimethylformamide and 46 parts of polyethylene glycol in sequence according to the weight ratio, and put them in a reaction kettle at a temperature of 50°C and a rotation speed of 100r After stirring and dissolving for 24 hours under the condition of / min, after cooling down to 20°C, under the condition of -0.09MPa, vacuum degassing for 12 hours to obtain a homogeneous feed solution, which is the casting film feed solution;
[0083] For the preparation of S2 core liquid, weigh 10 parts of dimethylformamide, 5 parts of polyethylene glycol PEG and 85...
Embodiment 2
[0094] This embodiment provides a preparation method of a hollow fiber reverse osmosis membrane, including: a preparation method of a hollow fiber base membrane and a preparation method of a hollow fiber reverse osmosis membrane.
[0095] (1) The preparation method of hollow fiber base membrane may further comprise the steps:
[0096] S1 Preparation of polyethersulfone-based membrane, weigh 26 parts of polyethersulfone, 32 parts of dimethylacetamide and 42 parts of polyvinylpyrrolidone in sequence according to the weight ratio, and put them in the reaction kettle at a temperature of 60 °C with a rotation speed of 100 r / After stirring and dissolving for 48 hours under the condition of min, after cooling down to 30°C, under the pressure of -0.08MPa, vacuum defoaming for 8 hours to obtain a homogeneous feed solution, which is the casting film feed solution;
[0097] For the preparation of S2 core liquid, weigh 12 parts of dimethylacetamide, 6 parts of glutaraldehyde and 82 parts...
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Abstract
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