Preparation method of micro-wave-shaped hollow fiber nanofiltration membrane
A technology of nanofiltration membrane and microwave wave, which is applied in the field of filtration membrane, can solve the problems of limited effective area of straight membrane, small flux of filter element assembly, high degree of freedom of membrane, etc., achieve low degree of freedom, increase flux of filter element, increase effective area Effect
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Embodiment 1
[0027] 1) Polysulfone (PSf) polymer (molecular weight 70,000), N,N-dimethylacetamide (DMAc), pore size regulator polyvinylpyrrolidone (PVP) (molecular weight 10,000) and pure water according to mass percentage Prepare casting solution by mixing 25%, 47%, 20%, and 8% in turn; prepare core solution by mixing 50% and 50% of N, N-dimethylacetamide and pure water according to mass percentage; mix casting solution The core liquid and the core liquid are respectively injected into a spinneret through the casting liquid channel and the core liquid channel through the gear pump, and the hollow tubular liquid film is extruded through the casting liquid port and the core liquid port of the spinneret. The inner and outer diameters of the membrane filaments are 0.2 / 0.4mm, casting fluid pressure is 2bar, temperature is 45°C, flow rate is 15g / min, core fluid pressure is 0.5bar, temperature is 45°C, flow rate is 1g / min, spinneret temperature is 45°C.
[0028] 2) The liquid film enters the ge...
Embodiment 2
[0031]1) Polysulfone (PSf) polymer (molecular weight 90,000), N,N-dimethylacetamide (DMAc), pore size regulator polyvinylpyrrolidone (PVP) (molecular weight 20,000) and pure water according to mass percentage 18%, 74%, 5%, and 3% were mixed successively to prepare the casting solution; N, N-dimethylacetamide and pure water were mixed according to the mass percentage of 60% and 40% respectively to prepare the core solution; the casting film The liquid and the core liquid are respectively injected into a spinneret through the casting liquid channel and the core liquid channel through the gear pump, and the hollow tubular liquid film is extruded through the casting liquid port and the core liquid port of the spinneret. 0.4 / 0.6mm, the casting fluid pressure is 1bar, the temperature is 45°C, the flow rate is 5g / min, the core fluid pressure is 0.5bar, the temperature is 45°C, the flow rate is 1g / min, and the spinneret temperature is 45°C.
[0032] 2) The liquid film enters the gel t...
Embodiment 3
[0035] 1) Polyethersulfone (PES) polymer (molecular weight: 90,000), dimethyl sulfoxide (DMSO), pore size regulator polyethylene glycol (PEG) (molecular weight: 2000) and pure water are 18% by mass. %, 74%, 5%, and 3% were mixed to prepare the casting solution; the core solution was prepared by mixing dimethyl sulfoxide and pure water according to the mass percentage of 75% and 25% respectively; the casting solution and the core solution were respectively passed through the gear The pump is injected into a spinneret through the casting liquid channel and the core liquid channel, and the hollow tubular liquid film is extruded through the casting liquid port and the core liquid port of the spinneret. The membrane liquid pressure is 1 bar, the temperature is 50°C, the flow rate is 10g / min, the core liquid pressure is 0.3 bar, the temperature is 55°C, the flow rate is 0.7g / min, and the spinneret temperature is 45°C.
[0036] 2) The liquid film enters the gel tank (gel device) afte...
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