Comparison of experimental approaches for the determination of the largest pore size (or first bubble point)

I. Kienbaum, I. Struzynska-Piron, IB-FT GmbH, Germany; D. Pattyn*, A. Odena, POROMETER NV, Belgium

One of the most critical properties of a porous material is its largest pore size – this often determines important characteristics like particle retention and flux. The largest pore size (often referred to as First Bubble point-abbreviated FBP) is often critical in applications, such as in filtration, when certain solutes must be retained. Therefore this value will determine the suitability of a certain membrane or filter for a particular application.

This work summarises the different experimental approaches to determine the FBP and discusses the differences, advantages and disadvantages of each. Various filters and membranes were selected for this study. The FBP was determined accoridng to different methids (manual/visual, calculated and measured) by means of a FBP semi-manual tester and two capillary flow prometers (POROLUXTM 500 and POROLUXTM 1000) based on the pressur scan and pressure step stablity methods, repectively.

The obtained visual, calculated and measured FBP were compared. The results show that..,

Session: F2 - Filter Media - Quality Control and Pore Size Analysis II
Day: 13 March 2018
Time: 14:45 - 16:00 h

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