Composite porous membrane material filled with boron nitride particles and its preparation method and application
A membrane material and curved hole technology, applied in the field of porous membrane materials and composite multi-porous membrane materials, can solve the problems of low battery charge retention, large surface pore size, high porosity, etc., and achieve excellent mechanical properties, surface pore size Small, high heat resistance effect
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Embodiment 1
[0036] A composite membrane material containing BN nanoparticles, which is based on electrospun polyimide (PI) nanofiber nonwovens, and the pores of the substrate are filled with BN nanoparticles (BN-NP);
[0037] Its preparation method is as follows:
[0038] (1) Nano-BN water-based suspension (BN / H 2 O-1) configuration: 80.0 grams of nano-boron nitride powder (mainly distributed in diameter 30nm), 1.0 grams of ammonium polyacrylate, 8.0 grams of polybutyl acrylate-isooctyl, 300.0 grams of distilled water, put into a beaker at one time, Emulsify at a speed of 8000 rpm to form a nano-BN water-based suspension with an absolute viscosity of 27mPa·S (BN / H 2 O-1).
[0039] (2) Preparation of BN / PI nanocomposite high-temperature-resistant high-safety battery separator: the above-configured BN / H 2 The O-1 boron nitride water-based suspension was spread flat on a glass plate to form a suspension film with a thickness of 30 μm, and then the electrospun PI nanofiber nonwoven with a th...
Embodiment 2
[0042] A composite membrane material containing BN nanoparticles, which is based on electrospun polyimide (PI) nanofiber nonwovens, and the pores of the substrate are filled with BN nanoparticles (BN-NP);
[0043] Its preparation method is as follows:
[0044] (1) Nano-BN water-based suspension (BN / H 2 O-2) configuration: 80.0 grams of nano-boron nitride powder (mainly distributed in 100 nm in diameter), 0.5 grams of ammonium polyacrylate, 8.0 grams of polybutyl acrylate-isooctyl, 433.0 grams of distilled water, put into a beaker at one time, Emulsify at a speed of 8000 rpm to form a nano-boron nitride water-based suspension (BN / H 2 O-2).
[0045] (2) Preparation of BN / PI nanocomposite high-temperature-resistant high-safety battery separator: the above-configured BN / H 2 The O-2 boron nitride water-based suspension was spread flat on a glass plate to form a suspension film with a thickness of 60 μm, and then the electrospun PI nanofiber nonwoven with a thickness of 38 μm was...
Embodiment 3
[0048] A composite membrane material containing BN nanoparticles, which is based on electrospun polyimide (PI) nanofiber nonwovens, and the pores of the substrate are filled with BN nanoparticles (BN-NP);
[0049] Its preparation method is as follows:
[0050] (1) Nano-BN water-based suspension (BN / H 2 O-3) configuration: 80.0 grams of nano-boron nitride powder (mainly distributed in diameter 50nm), 0.8 grams of ammonium polyacrylate, 8.0 grams of polybutyl acrylate-isooctyl, 300.0 grams of distilled water, put into a beaker at one time, Emulsify at a speed of 8000 rpm to form a micron boron nitride water-based suspension (BN / H) with an absolute viscosity of 24mPa·S 2 O-3).
[0051] (2) Preparation of BN / PI nanocomposite high-temperature-resistant high-safety battery separator: the above-configured BN / H 2 The O-3 boron nitride water-based suspension was spread flat on a glass plate to form a suspension film with a thickness of 50 μm, and then the electrospun PI nanofiber no...
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