A kind of amphiphilic polypropylene porous film and its preparation method and application
A porous membrane, polypropylene technology, applied in chemical instruments and methods, membrane, membrane technology, etc., can solve the problems of industrial scale difficulties, complex chemical reactions, hydrophilic attenuation, etc., to achieve no residual monomers, lipophilicity lasting. Stable, oil flux-enhancing effect
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Embodiment 1
[0087] According to 100 parts by mass of polypropylene porous membrane (specification 1: average pore size 0.8 μm, porosity 80%), maleic anhydride (5 parts by mass) was dissolved in acetone (50 parts by mass) to obtain an acetone solution of maleic anhydride; Sodium hydroxide (5 parts by mass) was dissolved in deionized water (50 parts by mass) to obtain an aqueous solution of sodium hydroxide; the maleic anhydride acetone solution was added to the polypropylene porous membrane under vacuum accompanied by mechanical stirring and mixed well , and then the mixture was dried (80°C blast drying oven drying). The dried mixture of maleic anhydride and polypropylene porous film was microwaved (power 700W) for 5 min under nitrogen atmosphere; the microwaved product was soaked in deionized water for 10 minutes and replaced with deionized water and repeated 3 times to ensure removal. The maleic anhydride monomer that did not participate in the grafting reaction was then dried in a blast...
Embodiment 2
[0090] Based on 100 parts by mass of the polypropylene porous membrane (same as in Example 1), maleic anhydride (5 parts by mass) was dissolved in acetone (50 parts by mass) to obtain an acetone solution of maleic anhydride; sodium hydroxide (5 parts by mass) Dissolved in deionized water (50 parts by mass) to obtain an aqueous sodium hydroxide solution; the maleic anhydride acetone solution was added to the polypropylene porous membrane under the condition of vacuum accompanied by mechanical stirring, and the mixture was dried (80 ℃ blast drying oven drying). The dried mixture of maleic anhydride and polypropylene porous film was microwaved (power 700W) for 5 min under nitrogen atmosphere; the microwaved product was soaked in deionized water for 10 minutes and replaced with deionized water and repeated 3 times to ensure removal. The maleic anhydride monomer that did not participate in the grafting reaction was then dried in a blast drying oven at 80°C to obtain a dry maleic an...
Embodiment 3
[0092] Based on 100 parts by mass of the polypropylene porous membrane (same as Example 1), dissolve vinyl silicone oil (10 parts by mass) in ethanol (50 parts by mass) to obtain an ethanol solution of vinyl silicone oil; parts) was dissolved in deionized water (50 parts by mass) to obtain an aqueous sodium chloride solution; the vinyl silicone oil ethanol solution was added to the polypropylene porous film under the condition of vacuum accompanied by mechanical stirring, and the mixture was dried (80°C blast drying oven drying); fully mix the powder of the mixture of vinyl silicone oil and polypropylene porous membrane dried after drying with sodium chloride aqueous solution, and then dry the mixture (80°C blast drying oven drying) dry); microwave the dried mixture under nitrogen atmosphere (power 1000W) for 3 min; soak the microwaved material in deionized water for 10 minutes and replace the deionized water for 3 times to ensure the removal of vinyl silicone oil that is not i...
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