Degradable hollow fiber membrane and application thereof
A fiber membrane and hollow technology, which is applied to degradable hollow fiber membranes and their application fields, achieves the effects of short degradation period, expanded use and excellent biodegradability
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Embodiment 1
[0038] (1) After pulverizing and drying polybutylene carbonate (PBC) with a molecular weight of 60,000, add polyethylene glycol (PEG) with a molecular weight of 8,000, and add the mixed raw materials to N,N-dimethylformamide , heated to 50°C, stirred and dissolved to form a solution, in which PBC accounted for 20% of the total mass, PEG accounted for 5% of the total mass, filtered the solution, and vacuum defoamed for 5 hours;
[0039] (2) Put the spinning solution into a barrel with heating and heat preservation function, keep the temperature at 50°C, extrude it with a spinneret for spinning hollow fibers, and solidify and shape it by wet spinning process. The parameters are: air layer Height 0cm, coagulation bath water, temperature 20°C; single-stage stretching, warm water bath as stretching medium, warm water bath temperature is 25°C, stretching ratio is 1.5 times; then remove solvent and porogen in warm water, in nitrogen Drying under protection, after sterilization treatm...
Embodiment 2
[0042] (1) After pulverizing and drying polybutylene carbonate (PBC) with a molecular weight of 100,000, add polyvinyl alcohol (PVA) with a molecular weight of 75,000, and add the mixed raw materials to N,N-dimethylformamide , heated to 40°C, stirred and dissolved to make a solution, in which PBC accounts for 25% of the total mass, PVA accounts for 12% of the total mass, the solution is filtered, and vacuum degassed for 7h;
[0043] (2) Put the spinning solution into a barrel with heating and heat preservation function, keep the temperature at 40°C, extrude it with a spinneret for spinning hollow fibers, and solidify and shape it by dry-wet spinning process. The parameters are: Air layer height 7cm, coagulation bath water, temperature 20°C; the stretching is carried out in two stages, the warm water bath is used as the stretching medium, the temperature of the warm water bath is 35°C, and the stretching ratio is 4 times; The pore agent is air-dried and sterilized to obtain the P...
Embodiment 3
[0046] (1) After pulverizing and drying polybutylene carbonate (PBC) with a molecular weight of 150,000, adding sodium chloride micropowder with a diameter of 0.8 μm, adding the mixed raw materials into acetone, heating to 55°C, stirring and dissolving to prepare into a solution, in which PBC accounts for 25% of the total mass, sodium chloride micropowder accounts for 2% of the total mass, the solution is filtered, and vacuum degassed for 5 hours;
[0047] (2) Put the spinning solution into a barrel with heating and heat preservation function, keep the temperature at 50°C, extrude it with a spinneret for spinning hollow fibers, and solidify and shape it by wet spinning process. The parameters are: spinneret There is no air layer between the head and the coagulation bath, the coagulation bath water, the temperature is 10°C; the stretching is carried out in three stages, the warm water bath is used as the stretching medium, the temperature of the warm water bath is 30°C, and the ...
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Abstract
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