Membrane pore structure and porosity testing method based on confocal laser scanning microscopy

Abstract

The invention provides a membrane pore structure and a porosity testing method based on CLSM (confocal laser scanning microscopy), comprising: preparing a sample, observing the sample, processing data and the other steps. Traditional testing methods include scanning electron microscopy, transmission electron microscopy, mercury intrusion method, nitrogen adsorption method and other methods and have their respective disadvantages; for example, high pressure required in the testing process of the mercury intrusion method may deform membrane structure; sample preparation in the transmission electron microscopy and scanning electron microscopy is high in time consumption and results in big damage to samples. Membrane pore structure and porosity are tested by means of confocal laser scanning microscopy, it is only required to perform single dyeing on a sample under test with fluorescent dye, information in the sample can be acquired without destroying the sample, operating is simple, and little damage is caused to the sample; in addition, sample testing herein has no need for drying, namely, a sample can be tested in an environment similar to a membrane when a liquid separation membrane is under test, and the results are more accurate and reliable.

Description

technical field [0001] The invention relates to the technical field of material testing, in particular to a membrane pore structure and porosity testing method based on laser confocal scanning. Background technique [0002] Membrane separation technology is widely used in various industries due to its functions of separation, purification and concentration, such as chemical industry, environmental protection, food, medicine, biology, etc. It is one of the most important means in today's separation science. The core component of membrane separation technology is the membrane, and the membrane pore structure and porosity are important parameters that affect membrane performance. Therefore, accurate testing of membrane pore structure and porosity plays an important guiding role in the development of new membranes and the application of membrane products. [0003] The traditional methods for testing membrane pore structure or porosity include scanning electron microscopy, trans...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a membrane pore structure and porosity test method based on laser confocal scanning, which solves the problem of time-consuming sample preparation, complicated preparation process, large trauma to the sample, and high toxicity of reagents used in the test process. Disadvantages such as high cost and high requirements for testers' experimental skills

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