Method for preparing hydrophilic polypropylene microporous film
A technology of polypropylene microporous membrane and hydrophilicity, which is applied in the field of preparation of hydrophilic polypropylene microporous membrane, can solve the problems of large polymer membrane damage, complicated process, and surface hydrophilization, so as to reduce the dosage, The effect of simple process steps
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Embodiment 1
[0026] Materials: polypropylene (ethylene-propylene copolymer, ethylene content 2-3% (weight ratio), melt index 7.0g / 10min), soybean oil, polypropylene grafted maleic anhydride (Ningbo Nengzhiguang GPM200AL, grafting rate 1.0% (weight ratio), melt index is 30-40g / 10min), nano-calcium carbonate (Shanghai Shengshi Chemical Co., Ltd.).
[0027] Ratio of material: polypropylene: soybean oil=27: 73 (weight ratio), polypropylene graft maleic anhydride accounts for 10% of polypropylene and soybean oil gross weight, and nano calcium carbonate accounts for 0.5% of polypropylene and soybean oil gross weight .
[0028] Blend the above materials uniformly at 190°C by solution blending method;
[0029] The mixed material prepared in the above steps is formed into a film at 180°C by a flat scraping method;
[0030] Quenching the film prepared in the above steps in a constant temperature water bath at 40°C;
[0031] Extracting the film prepared in the above steps in cyclohexane;
[0032]...
Embodiment 2
[0034] Material: polypropylene (ethylene-propylene copolymer, ethylene content 2-3% (weight ratio), melt index 7.0g / 10min), polypropylene grafted maleic anhydride (Ningbo Nengzhiguang GPM200AL, grafting rate 1.0% ( weight ratio), the melt index is 30-40g / 10min), soybean oil, sebacic acid.
[0035] Material ratio: polypropylene: soybean oil=35: 65 (weight ratio), polypropylene graft maleic anhydride accounts for 0.5% of polypropylene and soybean oil gross weight, and pimelic acid accounts for 0.5% of polypropylene and soybean oil gross weight .
[0036] Blend the above materials uniformly at 200°C by solution blending method;
[0037] Press the mixed material prepared in the above steps to form a film at 180°C with a flat hot press;
[0038] Quenching the film prepared in the above steps in a constant temperature water bath at 40°C;
[0039] Extracting the film prepared in the above steps in cyclohexane;
[0040] Soak the membrane prepared in the above steps for 10 h in 5% ...
Embodiment 3
[0042]Materials: polypropylene F401 (melt index 1.4-3.2g / 10min), soybean oil, dibutyl phthalate, polypropylene grafted with maleic anhydride (Ningbo Nengzhiguang GPM200AL, grafting rate 1.0% (weight ratio ), the melt index is 30-40g / 10min), nano-calcium carbonate (Shanghai Shengshi Chemical Co., Ltd.).
[0043] Ratio of materials: polypropylene: soybean oil: dibutyl phthalate=30:50:20 (weight ratio), polypropylene graft maleic anhydride accounts for 10% of polypropylene and soybean oil gross weight, nanometer calcium carbonate accounts for 1% of the combined weight of polypropylene and soybean oil.
[0044] The above materials were blended uniformly by solution blending at 180°C;
[0045] The mixed material prepared in the above steps was scraped on a polytetrafluoroethylene flat plate at 160°C to form a film.
[0046] Quenching the film prepared in the above steps in a constant temperature water bath at 30°C;
[0047] Extract the film prepared in the above steps in n-hexan...
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