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A kind of porous material and preparation method thereof

A technology of porous materials and powder materials, which is applied in the field of rapid preparation of porous materials, can solve the problems of difficult preparation of porous bodies of shape or size, unfavorable large-scale preparation of porous materials, etc., and achieve low processing equipment requirements, low cost, and controllable size Effect

Active Publication Date: 2016-02-17
SUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above method requires extremely high equipment, and special equipment is required because of the special voltage or current involved; in addition, the above method is not conducive to large-scale preparation of porous materials, and it is difficult to prepare porous bodies with large shapes or sizes

Method used

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  • A kind of porous material and preparation method thereof
  • A kind of porous material and preparation method thereof
  • A kind of porous material and preparation method thereof

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Experimental program
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preparation example Construction

[0023] The effect of the preparation method provided by the present invention is basically not limited by the type of starch, the type of foaming agent and the type of powder material. Both ordinary starch and modified starch are feasible, and the method can be applied to powder materials as long as they can be uniformly mixed with the forming agent. Even the density is 0.4g / cm 3 The powder material and molding agent can also be mixed into a uniform foaming slurry and prepared into a porous body. Experiments have shown that both inorganic and organic blowing agents can obtain porous bodies with stable pore structures.

[0024]According to the technical solution provided by the invention, the porous green body after foaming and before dehydration and drying has a relatively stable porous structure, but its strength and rigidity are not high, and it is suitable for size and shape processing. For example, the porous green body can be cut or injection molded to obtain the desired...

Embodiment 1

[0028] Mix ordinary starch with a mass ratio of 10% and water, heat it to gelatinize to form a viscous solution, and then add 35% starch with a density of 4g / cm 3 Aluminum oxide powder and 2% foaming agent TritonX, uniformly mixed to obtain a foaming slurry with a viscosity between 45-55Pa·s, see the attached figure 1 , Figure A is a photo of the slurry before foaming. Then, use mechanical stirring method to foam in the container at normal temperature until the foaming volume of the slurry no longer changes, and the stable porous structure in the container is the porous green body, see the attached figure 1 , Figure B is the green body after foaming. Dry the porous green body at 40°C to obtain a porous material.

[0029] Tested by the apparent density method, the porosity of the porous material is 67%. According to the mechanical compression test, the compressive strength of the porous material is 6.3MPa. See attached figure 2 , Observed under a microscope, the pore size...

Embodiment 2

[0032] Mix non-modified ordinary starch with any concentration between 5-20% by mass and water, heat it to make it gelatinize and form a viscous solution, and then add 5-50% to reach a density of 4g / cm 3 Alumina powder and 2% foaming agent TritonX are uniformly mixed to obtain a foaming slurry with a viscosity ranging from 1.1 to 100 Pa·s. Then, at any temperature between normal temperature and 96°C, use mechanical stirring method to foam in the container until the foaming volume of the slurry does not change, and the stable porous structure in the container is the porous green body. The porous green body is dried at room temperature or any temperature below 96°C to obtain a porous material.

[0033] Tested by the apparent density method, the porosity of the porous material can vary between 10% and 85%. According to the mechanical compression test, the compressive strength of the porous material varies between 0.1 and 9.0 MPa. Observed under a microscope, the pore size distr...

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Abstract

The invention discloses a porous material and a preparation method thereof, and particularly relates to a method for quickly preparing the porous material under normal temperature. The method comprises the following steps of mixing gel, a powder material and a foaming agent to obtain a foaming sizing agent, wherein the gel is prepared by pasting and ageing starch; and then agitating, foaming, dewatering and drying within the normal temperature range to obtain a porous body. The method has the characteristics of simple and fast process, low equipment requirements, no high-temperature treatment, etc. The porous body prepared by the method has the characteristics of adjustable size, simple and convenient shape processing, controllable strength and rigidness, high porosity, etc. Therefore, the method has a wide application prospect in the fields of porous biological materials, chemical materials, environmental materials, etc.

Description

technical field [0001] The invention relates to a method for rapidly preparing porous materials at normal temperature, belonging to the field of solid material preparation and processing engineering. Background technique [0002] Porous materials are widely used, and have in-depth applications in the fields of separation and filtration, water and air purification, chemical synthesis, pollutant removal, biomedicine, and electronic (scientific) components. Before the present invention is made, the preparation method of prior art porous material mainly contains: [0003] (1) "Preparation and Properties of Composite Phosphate Porous Bioceramics (Journal of Wuhan University of Technology, 33(2011), NO.33-36)" reported by Liu Bin, Dong Yinsheng and others. The preparation method is as follows: mix the mixed solution of aluminum dihydrogen phosphate and magnesium dihydrogen phosphate with hydroxyapatite (HA) powder according to a certain mass ratio, add an appropriate amount of di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/02B28B1/50C22C1/08C08J9/04C08L67/04C08L25/06C08L3/02
Inventor 杨磊韦之豪刘慧玲杨惠林白艳洁黄彦林李建祥
Owner SUZHOU UNIV
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