Porous film and its preparation method

Abstract

The invention relates to a porous film and a preparation method thereof. The method comprises the following steps: mixing 30-40 parts by mass of inorganic powder, 5-15 parts by mass of a pore forming agent, 15-25 parts by mass of organic solvent, 0.3-5.5 parts by mass of a dispersing agent, 0.1-1 part by mass of a defoaming agent; grinding for the first time to obtain suspension; adding 15-38 parts by mass of an adhesive, 0.1-1.5 parts by mass of a flatting agent to the suspension; grinding for the second time; filtering; collecting filtrate to obtain slurry; performing glue removing and sintering on the sizing to obtain the porous film. According to the preparation method of the porous film, the dispersing agent and the flatting agent are arranged during the preparation, so that the uniformity of the prepared sizing can be improved; the obtained sizing is subjected to glue removing and sintering, so that the prepared porous film is high in hole uniformity, and the actual production and application can be conveniently carried out.

Description

Technical field

[0001] The invention relates to the technical field of porous materials, in particular to a porous film and a preparation method thereof. Background technique

[0002] The porous film has a regularly arranged, pore structure with controllable size, has the characteristics of adsorption, penetration, and photoelectricity, and has broad application prospects. The traditional porous film preparation method uses the powder to be formed by extrusion or casting. However, the porous film prepared by this method has poor pore-forming uniformity and a small application range. Summary of the invention

[0003] Based on this, it is necessary to provide a method for preparing a porous film with good programmable uniformity and a porous film prepared by the method for preparing the porous film to solve the problem of poor pore formation uniformity.

[0004] A porous film, the raw materials for preparing the porous film include the following components in parts by mass:

[0005] ...

Examples

preparation example Construction

[0032] figure 1 The method for preparing the porous film of one embodiment shown includes the following operations.

[0033] S110: Mix the inorganic powder, the pore former, the organic solvent, the dispersant and the defoamer, and grind for the first time to obtain a suspension.

[0034] Among them, the mass parts of the inorganic powder are 30 parts to 40 parts, preferably 37 parts. Preferably, the inorganic powder is selected from at least one of titanium dioxide, aluminum oxide, zirconium oxide and yttrium stabilized zirconium oxide. The inorganic powder constitutes the skeleton of the porous film. The inorganic powder in this embodiment can be directly purchased commercially, or can be prepared by well-known technical means.

[0035] The mass parts of the pore former is 5 parts to 15 parts, preferably 6 parts. The pore former is selected from at least one of carbon powder, barium carbonate, calcium carbonate, ammonium bicarbonate, starch, polystyrene microspheres and polymeth...

Embodiment 1

[0064] Formula (counted by mass parts):

[0065]

[0066] Weigh the formula amount of dibasic acid ester DBE, triethanolamine and polydimethylsiloxane and mix them evenly, then add the formula amount of aluminum oxide and carbon powder, and add 2 times the weight of aluminum oxide of zirconium Ball, planetary ball mill 8h.

[0067] Then add formula amount of hydroxypropyl methylcellulose and organic modified polysiloxane, ball mill for 12h, and take out the zirconium ball.

[0068] The slurry after taking out the zirconium balls was filtered through a 200-mesh filter cloth, and the obtained slurry was screen-printed and filtered using a KEKO machine to obtain a slurry film. Printing parameters: net height 500μm, squeegee speed 3.8cm / s, pressure 0.5MPa, printing times 3.

[0069] Then, increase the temperature to 400°C at a heating rate of 0.5°C / min for debinding for 8 hours; during sintering, increase the temperature to 1400°C at a heating rate of 1°C / min for sintering, and the sinte...

Embodiment 2

[0072] Formula (counted by mass parts):

[0073]

[0074] Weigh the formulated amounts of hexylene glycol, triolein and methyl alkyl polysiloxane, and mix them evenly, then add the formulated amount of zirconia and carbon powder, and add 2 times the mass of yttrium stabilized zirconia. Ball, planetary ball milling for 16h.

[0075] Then add formula amount of polymethyl methacrylate and urea-formaldehyde resin, ball mill for 8 hours, and take out the zirconium ball.

[0076] The slurry after taking out the zirconium balls was filtered through a 200-mesh filter cloth, and the obtained slurry was screen-printed and filtered using a KEKO machine to obtain a slurry film. Printing parameters: net height 500μm, squeegee speed 3.8cm / s, pressure 0.5MPa, printing times 3.

[0077] Then, increase the temperature to 400°C at a heating rate of 0.5°C / min for debinding for 8 hours; during sintering, increase the temperature to 1400°C at a heating rate of 1°C / min for sintering, and the sintering is ...

Technical field

[0001] The invention relates to the technical field of porous materials, in particular to a porous film and a preparation method thereof. Background technique

[0002] The porous film has a regularly arranged, pore structure with controllable size, has the characteristics of adsorption, penetration, and photoelectricity, and has broad application prospects. The traditional porous film preparation method uses the powder to be formed by extrusion or casting. However, the porous film prepared by this method has poor pore-forming uniformity and a small application range. Summary of the invention

[0003] Based on this, it is necessary to provide a method for preparing a porous film with good programmable uniformity and a porous film prepared by the method for preparing the porous film to solve the problem of poor pore formation uniformity.

[0004] A porous film, the raw materials for preparing the porous film include the following components in parts by mass:

[0005] ...

Examples

preparation example Construction

[0032] figure 1 The method for preparing the porous film of one embodiment shown includes the following operations.

[0033] S110: Mix the inorganic powder, the pore former, the organic solvent, the dispersant and the defoamer, and grind for the first time to obtain a suspension.

[0034] Among them, the mass parts of the inorganic powder are 30 parts to 40 parts, preferably 37 parts. Preferably, the inorganic powder is selected from at least one of titanium dioxide, aluminum oxide, zirconium oxide and yttrium stabilized zirconium oxide. The inorganic powder constitutes the skeleton of the porous film. The inorganic powder in this embodiment can be directly purchased commercially, or can be prepared by well-known technical means.

[0035] The mass parts of the pore former is 5 parts to 15 parts, preferably 6 parts. The pore former is selected from at least one of carbon powder, barium carbonate, calcium carbonate, ammonium bicarbonate, starch, polystyrene microspheres and polymeth...

Embodiment 1

[0064] Formula (counted by mass parts):

[0065]

[0066] Weigh the formula amount of dibasic acid ester DBE, triethanolamine and polydimethylsiloxane and mix them evenly, then add the formula amount of aluminum oxide and carbon powder, and add 2 times the weight of aluminum oxide of zirconium Ball, planetary ball mill 8h.

[0067] Then add formula amount of hydroxypropyl methylcellulose and organic modified polysiloxane, ball mill for 12h, and take out the zirconium ball.

[0068] The slurry after taking out the zirconium balls was filtered through a 200-mesh filter cloth, and the obtained slurry was screen-printed and filtered using a KEKO machine to obtain a slurry film. Printing parameters: net height 500μm, squeegee speed 3.8cm / s, pressure 0.5MPa, printing times 3.

[0069] Then, increase the temperature to 400°C at a heating rate of 0.5°C / min for debinding for 8 hours; during sintering, increase the temperature to 1400°C at a heating rate of 1°C / min for sintering, and the sinte...

Embodiment 2

[0072] Formula (counted by mass parts):

[0073]

[0074] Weigh the formulated amounts of hexylene glycol, triolein and methyl alkyl polysiloxane, and mix them evenly, then add the formulated amount of zirconia and carbon powder, and add 2 times the mass of yttrium stabilized zirconia. Ball, planetary ball milling for 16h.

[0075] Then add formula amount of polymethyl methacrylate and urea-formaldehyde resin, ball mill for 8 hours, and take out the zirconium ball.

[0076] The slurry after taking out the zirconium balls was filtered through a 200-mesh filter cloth, and the obtained slurry was screen-printed and filtered using a KEKO machine to obtain a slurry film. Printing parameters: net height 500μm, squeegee speed 3.8cm / s, pressure 0.5MPa, printing times 3.

[0077] Then, increase the temperature to 400°C at a heating rate of 0.5°C / min for debinding for 8 hours; during sintering, increase the temperature to 1400°C at a heating rate of 1°C / min for sintering, and the sintering is ...

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