Hydrophilic polypropylene hollow fiber microporous membrane and preparation method thereof
A technology of microporous membrane and polypropylene, which is applied in the direction of fiber type, fiber treatment, chemical instruments and methods, etc. It can solve the problems of poor membrane pressure resistance, unsuitability for industrial production, and difficulty in industrial scale-up
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Embodiment 1
[0076] Add 25wt% polypropylene resin (Z30S) and 75wt% soybean oil in a kettle with a stirring device, heat to 185° C., and stir for 3 hours under the condition of nitrogen flow, stop the stirring and let stand at constant temperature for defoaming for 2 hours to obtain Casting liquid: filter the casting liquid with a temperature of 185°C through a 100-mesh stainless steel filter, and use a gear-type metering pump to transport the casting liquid to a hollow spinneret with soybean oil as the inner core liquid. The temperature of the spinneret is The casting solution at 150°C is extruded through the spinneret, cooled with soybean oil at 20°C, and solidified by cooling to obtain the precursor of the polypropylene hollow fiber microporous membrane; the precursor of the polypropylene hollow fiber microporous membrane is wound up by a winding machine, and then placed Extract in acetone for 6 hours; take out the extracted polypropylene hollow fiber microporous membrane, place it in a f...
Embodiment 2
[0079] Except that the dried maleic anhydride and polypropylene hollow fiber microporous membrane mixture was microwaved (power 500W) for 11 minutes under a nitrogen atmosphere, the rest were the same as in Example 1. The contact angle and pure water flux (external pressure, internal pressure) data of the hydrophilic polypropylene hollow fiber microporous membrane before and after the reaction with alkali are shown in Table 1.
Embodiment 3
[0081] Except that the dried maleic anhydride and polypropylene hollow fiber microporous membrane mixture was microwaved (power 700W) for 9 minutes under a nitrogen atmosphere, the rest were the same as in Example 1. The contact angle and pure water flux (external pressure, internal pressure) data of the hydrophilic polypropylene hollow fiber microporous membrane before and after the reaction with alkali are shown in Table 1.
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Abstract
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