Polytetrafluoroethylene hollow fiber membrane
A polytetrafluoroethylene and fiber membrane technology, applied in the field of porous materials, can solve the properties of polytetrafluoroethylene porous membrane materials such as strength, elastic modulus, uneven flux, unsatisfactory application performance, and irregular pore structure and other problems, to achieve the effect of ensuring uniformity, stable shape and good penetration
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[0023] Example 1
[0024] The polytetrafluoroethylene hollow fiber membrane of the present invention has a secondary pore structure, wherein the cavity walls of the first-level cavities that are evenly distributed and interpenetrated with each other are provided with evenly distributed and interpenetrated second-level cavities. The holes also penetrate each other, and the penetration is a three-dimensional penetration. Each level of porous material in the material body is a continuous structure. The total effective porosity is 70%, the fiber diameter is 500nm±20nm, the average pore diameter of the macropores is 1000nm, and there are through-holes with an average pore diameter of 50nm on the wall of the macropore.
[0025] Use mechanical processing methods to randomly take 9 pieces of 10mm×10mm×10mm three-dimensional bodies of the same size on the porous material, and test their quality with a METTLER TOLEDO XP26 Microbalance balance. The results are shown in Table 1. Among them, ...
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[0035] Example 2
[0036] The polytetrafluoroethylene hollow fiber membrane of the present invention has a three-level pore structure, wherein the cavity walls of the first-level cavities that are evenly distributed and interpenetrated with each other are provided with evenly distributed and intersected second-level cavities. The holes also penetrate each other, and the penetration is a three-dimensional penetration. Each level of porous material in the material body is a continuous structure. The maximum outer boundary of each level of porous material is equivalent to the space boundary of the entire material body. The total effective porosity is 80%, the fiber diameter is 700±20 nm, and the average pore diameter of the macropores is 1500 nm. There are through secondary pores with an average pore diameter of 100 nm on the wall of the macropore, and there are Tertiary holes with an average pore diameter of 10nm through.
[0037] Use mechanical processing methods to randomly tak...
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