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Apparatus and method for testing permeability of porous material

A porous material and permeability technology, applied in the field of material testing, can solve problems such as less consideration of permeability performance and far difference in permeability compatibility of natural bones

Active Publication Date: 2016-05-11
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, the permeability properties of bone scaffold materials are rarely considered in the preparation of bone scaffold materials at home and abroad, so that the permeability compatibility with sky bone is far away.

Method used

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  • Apparatus and method for testing permeability of porous material
  • Apparatus and method for testing permeability of porous material
  • Apparatus and method for testing permeability of porous material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1: the test of artificial bone permeability

[0048] (1) Using a 150ml syringe with an inner diameter of D=40mm, the artificial bone test piece is ground into a thin slice with a diameter of d=30mm and a thickness of 5mm, and put it between the first and second sealing pads of the syringe and compact it. Then fill with water and evacuate the air, record the original height h of the water column 0 . Then use a material testing machine to pressurize, set the pressure to 10N, and keep it for 2 minutes, and observe the drop height z of the water column 0 , and record, in order to reduce the error, adopt continuous test, pressure increment method, increase 5N each time, keep the same time for 2 minutes. Take the viscosity of water η=10 -3 Pa·s. Then repeat 5 times, and record the height of each liquid level drop. Fill in Form 1 below:

[0049] Table 1: Example 1—the test data form of artificial bone permeability

[0050]

[0051] (2) Then bring into the ...

Embodiment 2

[0052] Embodiment 2: the test of porous titanium metal permeability

[0053] (1) Using a 150ml syringe with an inner diameter of D = 30mm, the porous titanium metal specimen is ground into a thin slice with a diameter of d = 25mm and a thickness of 10mm, and put it between the first sealing pad and the second sealing pad of the syringe and compact it. Then fill with water and evacuate the air, record the original height h of the water column 0. Then use a material testing machine to pressurize, set the pressure to 50N, and keep it for 5 minutes, and observe the drop height z of the water column 0 , and record, in order to reduce the error, adopt continuous test, pressure increment method, increase 50N each time, keep the same time for 5 minutes. Take the viscosity of water η=10 -3 Pa·s. Then repeat 5 times, and record the height of each liquid level drop. Fill in Form 2 below:

[0054] Table 2: Example 2 - test data table of porous titanium metal

[0055]

[0056] ...

Embodiment 3

[0058] Embodiment 3: the permeability test of aluminum foam material

[0059] (1) Using a 200ml syringe with an inner diameter of D = 45mm, the artificial bone specimen is ground into a thin slice with a diameter of d = 35mm and a thickness of 40mm, and put it between the first and second sealing pads of the syringe and compact it. Then fill with water and evacuate the air, record the original height h of the water column 0 . Then use a material testing machine to pressurize, set the pressure to 100N, and keep it for 10 minutes, and observe the drop height z of the water column 0 , and record, in order to reduce the error, adopt continuous test, pressure increment method, increase 100N each time, keep the same time for 10 minutes. Take the viscosity of water η=10 -3 Pa·s. Then repeat 5 times, and record the height of each liquid level drop. Fill in Form 3 below:

[0060] Table 3: Example 3——Test data form of aluminum foam material

[0061]

[0062] (2) Finally, bring...

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Abstract

The present invention discloses an apparatus and a method for testing permeability of a porous material, and belongs to the field of materials testing. According to Darcy's law, a test material is made into a cylinder / disk-shaped specimen, the cylinder / disk-shaped specimen is put into a syringe, hydraulic pressure is controlled by a material testing machine, and the permeability of the material can be obtained by testing and calculation of the speed of a liquid to pass through the material by. The method can be used as a method to test and characterize the porosity of the porous material and liquid permeability / penetrability. The testing technology is simple in operation and high in precision, is expected to promote as a testing technology for porosity characters of other porous materials, and has potential application value in material testing engineering filed.

Description

technical field [0001] The invention relates to a device and method for testing the permeability of porous materials, belonging to the field of material testing. Background technique [0002] Porous materials, such as artificial bone, foam material, porous metal, etc., are widely used in engineering fields. In order to achieve certain properties of materials, artificial pores have become a rising technology. The physical properties of materials include indicators such as strength and hardness, but the permeability is often ignored by designers of engineering materials, especially the testing of the permeability of the designed porous materials has become a major problem in the industry. In the field of scaffold materials for bone tissue engineering, good permeability is undoubtedly a prerequisite for determining whether the scaffold material can be successfully absorbed by the human body. However, at present, the permeability properties of bone scaffold materials are rarel...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/082
Inventor 武晓刚王艳芹武晓红李世兴郭媛高志鹏王颖陈维毅
Owner TAIYUAN UNIV OF TECH
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