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Evaluation of pore distribution in non-woven fabric sheets

Evaluation of pore distribution in non-woven fabric sheets

Important analysis items for performance evaluation and quality control of functional materials! Evaluation of pore size and pore distribution of non-woven sheets and membrane materials.

This is an example of evaluating the maximum pore diameter and pore size distribution of non-woven fabric sheets using the bubble point method. The sample is immersed in a chemical solution, and air pressure is applied. The pressure is increased until it overcomes the surface tension of the chemical solution absorbed in the sheet, at which point the appearance of bubbles occurs; this pressure is referred to as the bubble point. The maximum pore diameter can be calculated based on the bubble point pressure and the surface tension of the chemical solution. 【Calculation Formula】 ■d = Cy/P ・d: maximum pore diameter ・C: constant ・y: surface tension of the chemical solution ・P: differential pressure *For more details, please refer to the PDF document or feel free to contact us.

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No.38 Evaluation of Surface Area and Pore Distribution Without Gas

No.38 Evaluation of Surface Area and Pore Distribution Without Gas

Introduction to the free space pre-measurement / free space continuous measurement method "AFSM2" considering true density!

At MicrotracMRB, as a countermeasure against the recent shortage of helium (He) gas supply, we have added a new feature to the BELSORP series: the helium-free continuous measurement method "AFSM2: Advanced Free Space Measurement 2." In this document, we will compare the results obtained using the AFSM2 function and the AFSM function with the "BELSORP MINI X." We invite you to read it. [Contents] ■ Figure 1 Measurement routine of BELSORP MINI X using AFSM2 ■ Table 1 Comparison of AFSM2 and AFSM methods ■ Figure 2 CB#3845 Adsorption isotherm (N2, @ 77 K) ■ Figure 3 CB#3845 BET-Plot ■ Figure 4 TMPS-4 Adsorption isotherm (N2, @ 77 K) ■ Figure 5 TMPS-4 BJH-Plot (ads.) *For more details, please refer to the PDF document or feel free to contact us.

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[New Feature] Evaluation of specific surface area and pore distribution without the need for helium gas.

[New Feature] Evaluation of specific surface area and pore distribution without the need for helium gas.

Developed and released a new feature that enables the evaluation of specific surface area and pore distribution without using helium gas!

At MicrotracMRB, we have developed a new feature called the 'AFSM2' free space continuous measurement method, which does not require helium gas due to the recent shortage of helium gas supply. By using an adsorbate such as N2 in advance to determine the "free space value of the blank sample tube" (calibration), we calculate the adsorption amount by subtracting the "excluded volume of the sample determined from the sample mass and density" from the free space (calculated value). The difference in free space due to the liquid nitrogen level during pre-calibration and adsorption measurement is automatically determined using a reference tube, so there is no need to keep the liquid level constant. 【Features】 ■ Continuous measurement of free space: Possible ■ He gas: Not required ■ Free space (initial value): Pre-measurement + reference tube correction ■ Sample tube ID management: Required (register ID and volume in software) ■ Measurement time: Approximately 45 minutes shorter ■ Direct measurement of net adsorption amount: Possible *For more details, please refer to the PDF document or feel free to contact us.

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