Porous film and preparation method thereof
A porous film and porous support technology, which is applied in the field of preparation of the porous film, can solve the problems of large raw material powder gap, high tap density, and reduced flatness of the porous film.
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Embodiment 1
[0021] The preparation of the porous film includes steps: (1) adopting a layer of copper foil as a porous support body, its thickness is 0.05 mm, the mesh size is 30 μm, and the porosity is 58%; (2) using PVB as a binder, ethanol as Dispersant, prepare binder solution; Adopt 200 mesh screens to filter binder solution then; (3) take dendritic Cu powder as raw material powder, contain the proportioning of 0.7gPVB, 60gCu powder in every 100mL ethanol , adding Cu powder to the filtered binder solution, stirring continuously until a uniform slurry is formed; (4) spraying the slurry on the copper foil (the loading capacity of the slurry is per m 3 The porous support is loaded with 400g of slurry) and dried at 60°C for 4 hours to make a membrane blank; (5) The membrane blank is sintered in sections, the first stage is raised from room temperature to 200°C and kept for 150min, the heating rate 1-3°C / min, the second stage is raised to 650°C and held for 200 minutes, the heating rate is...
Embodiment 2
[0023] The preparation of the porous film includes steps: (1) adopting a layer of aluminum foam as a porous support body, the thickness of which is 1.2 mm, the mesh size is 500 μm, and the porosity is 90%; then rolling for 2 minutes at a rolling gap of 1 mm; (2) take PVB as binder, ethanol as dispersant, prepare binder solution; Adopt 200 mesh screens to filter binder solution then; (3) take dendritic Al powder as raw material powder, press every 100mL of ethanol contains a ratio of 1.1gPVB and 70g of Al powder. Add the Al powder to the filtered binder solution and keep stirring until a uniform slurry is formed; (4) Spray the slurry on the aluminum foam (slurry The load capacity is per m 3 The porous support is loaded with 600g slurry) and dried at 60°C for 4 hours to make a membrane blank; (5) Roll the membrane blank for 2min at a rolling gap of 1.2mm; (6) Roll the membrane blank Carry out segmented sintering, the first stage is raised from room temperature to 200°C and kept...
Embodiment 3
[0025] The preparation of porous film comprises the steps: (1) adopting two layers of nickel foam as a porous support body, each layer of thickness is 0.5mm, mesh size is 100 μm, and porosity is 88%; Roll for 3min under rolling gap; (2) use PVB as binder and ethanol as dispersant to prepare binder solution; then use 200-mesh screen to filter binder solution; (3) use dendritic Ni powder is raw material powder, according to the proportioning that contains 1.5gPVB, 80gNi powder in every 100mL ethanol, Ni powder is added in the binder solution after filtering, stir constantly until forming uniform slurry; (4) slurry The slurry is sprayed on the nickel foam (the loading of the slurry is per m 3 The porous support is loaded with 600g slurry) and dried at 60°C for 4 hours to make a membrane blank; (5) Roll the membrane blank for 2min at a rolling gap of 0.8mm; (6) Roll the membrane blank after rolling Carry out segmented sintering, the first stage is raised from room temperature to ...
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