| abstract |
The invention discloses a porous material and a preparation method. The material includes a material body, the body is composed of a cavity that is graded by the size of the aperture of the material, and a cavity wall that surrounds the cavity, and surrounds the upper cavity in a three-dimensional space. The lower-level cavities are arranged on the cavity wall, and the cavities at all levels are connected to each other and the cavities at all levels are also connected to each other; the preparation method is: the pore-making process of raw material powder and the smallest first-level cavity used to prepare porous materials The slurry is mixed and prepared into a slurry, and the slurry is evenly filled into the polymer material support to form a green body, which is dried and crushed to obtain mixed particles, and the mixed particles are used to prepare the upper-level cavity larger than the smallest cavity of the porous material. The pore-forming agent is evenly mixed to form a dense green body, and then vacuum sintered, and the conventional follow-up treatment is carried out according to the raw material process of the porous material. This kind of porous material has good penetration and uniform performance. Each level of porous material has its own physical and chemical properties, which can fully meet various functional requirements. It can be used as a variety of materials such as biological materials and separation materials. The preparation method is simple and easy to realize. |