Polyether sulfone hollow fiber filter membrane and its preparation method
A technology of fiber filter membrane and polyethersulfone, which is applied in the field of polyethersulfone hollow fiber filter membrane and its thermally induced phase separation method, can solve problems in the research and development stage, and achieve uniform pore distribution, high membrane strength, The effect of high porosity
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Embodiment 1
[0024]Embodiment 1: take by weight 50% polyethersulfone resin (molecular weight: 50,000), 20% dioctyl phthalate, 10% dimethyl phthalate, 20% nanometer hydrophobic calcium carbonate ( Particle size: 30-40nm) Mix the materials evenly with a high-speed mixer. The stirred materials are melted and plasticized by a twin-screw extruder at 380°C, and passed through a sleeve-type spinneret (the diameter of the outer sleeve is 3.0mm, and the inner center tube The diameter is 1.2mm), the central tube of the spinneret is fed with nitrogen, extruded into a hollow fiber shape, and then enters a 30°C water tank through an air distance of 5cm to cool and form, and the formed hollow fiber is collected by a winding wheel. The collected hollow fibers were extracted with n-hexane to extract the thinner dioctyl phthalate and dimethyl phthalate, and the inorganic pore-forming agent calcium carbonate was extracted with 2M hydrochloric acid to obtain polyethersulfone hollow fibers The outer diameter ...
Embodiment 2
[0025] Embodiment 2: Adopt the preparation method and process of Example 1, the difference is that the formula weighs 40% polyethersulfone resin (molecular weight: 50,000), 20% dioctyl phthalate, 20% diphthalate Isodecyl ester and 20% nano-scale hydrophobic calcium carbonate (particle size: 30-40nm) are uniformly mixed and stirred with a high-speed mixer, and the stirred material is melted, plasticized and extruded by a twin-screw extruder at 350 ° C. Spinning process embodiment 1 is identical, the hollow fiber after collecting is respectively extracted with cyclohexane and 2M hydrochloric acid thinner dioctyl phthalate, diisodecyl phthalate and inorganic pore-forming agent calcium carbonate respectively and Extracted, the prepared polyethersulfone (PES) hollow fiber membrane has an outer diameter of 1.63 mm, an inner diameter of 0.90 mm, a porosity of 75%, a bubble point pressure of 0.27 MPa, and a pure water flux of 1,285 L / m 2 ·h (0.1MPa, 25°C), burst pressure > 1.0MPa, ten...
Embodiment 3
[0026] Embodiment 3: Adopting the preparation method and process of Example 1, the difference is that the formula weighs 40% polyethersulfone resin (molecular weight: 50,000), 20% dioctyl phthalate, 20% diphthalate Isodecyl fat, 20% nano-grade hydrophobic zinc oxide (particle size: 60nm) was uniformly mixed and stirred with a high-speed mixer, and the stirred material was melted, plasticized and extruded by a twin-screw extruder at 370 ° C, and spun Silk technology and extraction and extraction processing technology are identical with embodiment 1. The collected hollow fibers are respectively extracted and extracted with alcohol and 2M sulfuric acid diluent dioctyl phthalate, dimethyl phthalate and inorganic pore-forming agent zinc oxide, and the prepared polyethersulfone (PES ) The outer diameter of the hollow fiber membrane is 1.53mm, the inner diameter is 0.88mm, the porosity is 75%, the bubble point pressure is 0.24MPa, and the pure water flux is 1,525L / m 2 ·h (0.1MPa, 25...
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