A kind of polytetrafluoroethylene microfiber tubular membrane
A polytetrafluoroethylene, tubular membrane technology, applied in the field of porous materials, can solve the properties of polytetrafluoroethylene porous membrane materials such as strength, elastic modulus, non-uniform flux, inability to meet application performance, and irregular pore structure. It can achieve the effect of bright and smooth luster, uniform consistency and good penetration.
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Embodiment 1
[0024] The polytetrafluoroethylene fiber tubular membrane of the present invention has a secondary pore structure, wherein the uniformly distributed and interpenetrating first-stage cavities have second-stage cavities evenly distributed and interpenetrating on the cavity wall, and the two The stage holes also penetrate each other, and the penetration is three-dimensional. Each level of porous material in the material body is a continuous structure. The total effective porosity is 75%, the fiber diameter is 150±20 nm, the average pore diameter of the large pores is 0.45 μm, and there are through small holes with an average pore diameter of 30 nm on the wall of the large pores.
[0025] Take 9 three-dimensional bodies of the same size of 10mm × 10mm × 10mm on the porous material by mechanical processing method, and use the Mettler-Toledo XP26 Microbalance balance to test its quality. The results are shown in Table 1. Among them, relative to the average The absolute value of the...
Embodiment 2
[0038] The polytetrafluoroethylene fiber tubular membrane of the present invention has a three-level pore structure, wherein the uniformly distributed and interpenetrating first-level cavities have second-level cavities evenly distributed and interpenetrating on the cavity wall, and the two The stage holes also penetrate each other, and the penetration is three-dimensional. Each level of porous material in the material body is a continuous structure. The total effective porosity is 85%, the fiber diameter is 180±20 nm, and the average pore diameter of macropores is 1000nm. Tertiary pores with an average pore diameter of 10nm.
[0039] Take 9 three-dimensional bodies of the same size of 10mm × 10mm × 10mm on the porous material by mechanical processing method, and use the Mettler-Toledo XP26 Microbalance balance to test its quality. The results are shown in Table 1. Among them, relative to the average The absolute value of the deviation of the value is expressed as a percenta...
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