| abstract |
The invention relates to a preparation method of a hollow fiber membrane, in particular to a poly-4-methyl-1-pentene hollow fiber membrane applied to ECMO and a preparation method thereof. The invention is a method for preparing a poly-4-methyl-1-pentene porous film by a melt extrusion method. In the production process of the method, poly-4-methyl-1-pentene and different kinds of diluents are used to prepare Poly-4-methyl-1-pentene hollow fiber membranes with different pore shapes, the principle of film formation is to mix poly-4-methyl-1-pentene powder with a diluent, and then melt the poly-4-methyl-1-pentene powder and spray it through the twin-screw. After the filament head is stretched and extruded, a poly-4-methyl-1-pentene hollow fiber membrane is prepared by two-step cold and hot stretching, and the rubber material is coated through a deposition tank to form a dense layer on the surface of the hollow fiber membrane, The diluent is extracted to produce different membrane pore shapes and porous structures, thereby obtaining a poly-4-methyl-1-pentene composite hollow fiber membrane with a certain pore size distribution, good micropore structure and anti-leakage function. |