Method for preparing hydrophobic microporous membrane and membrane prepared by method
A microporous membrane and hydrophobic technology is applied in the field of preparation of hydrophobic microporous membranes to achieve the effects of good thermal stability, good retention effect and excellent performance.
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Embodiment 1
[0036] A method for preparing a hydrophobic microporous membrane, the steps are as follows:
[0037] (1) Add polypropylene (iPP) granules and high-density polyethylene (HDPE) granules, diluent soybean oil and nucleating agent adipic acid into a four-necked flask, nitrogen as a protective gas, at a temperature of 190°C to 200°C, and stir Heat the casting solution until it becomes a homogeneous solution, and the optimum heating time is 6 hours to obtain the casting solution;
[0038] Among them, the mass ratio of iPP / HDPE is 6:1, and the weight percent of each raw material is: the sum of iPP / HDPE is 30wt.%, the nucleating agent is 0.5wt.%, and the diluent is 69.5wt.%.
[0039] (2) The casting liquid system is degassed under 0.02MPa, and the best time is 2h;
[0040] (3) Preheat the scraper, scraper, and sampler in an oven at a temperature of 210°C to 220°C;
[0041] (4) Use a sampler to move 10g to 15g of the casting solution to the scraper, and use a scraper to quickly scrape...
Embodiment 2
[0046] A method for preparing a hydrophobic microporous membrane, the steps are as follows:
[0047] (1) Add polypropylene (iPP) particles and high-density polyethylene (HDPE) particles, diluents are esters or liquid paraffin and nucleating agent adipic acid in a four-necked flask, nitrogen is used as a protective gas, and the temperature is 190 ℃~200℃, stir and heat the casting solution until it becomes a homogeneous solution, and the best heating time is 5h~8h to obtain the casting solution;
[0048] Among them, the mass ratio of iPP / HDPE is 4:1~7:1, the weight percentage of each raw material is: the sum of iPP / HDPE is 25wt.%~38wt.%, adipic acid is 0.5wt.%, soybean oil is supplemented to 100%.
[0049] (2) The casting liquid system is degassed under 0.02MPa, and the degassing time is 2h to 4h;
[0050] (3) Preheat the scraper, scraper, and sampler in an oven at a temperature of 210°C to 220°C;
[0051] (4) Use a sampler to move 10g to 15g of the casting solution to the sc...
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