Related Experiment Video
Updated: Jul 13, 2026
11:52
Microbubble Fabrication of Concave-porosity PDMS Beads
Published on: December 15, 2015
"Modified" Liquid⁻Liquid Displacement Porometry and Its Applications in Pd-Based Composite Membranes
Lei Zheng1,2, Hui Li3, Haijun Yu4
1Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. zlei@dicp.ac.cn.
Membranes
|June 13, 2018
Summary
A new method accurately characterizes pore mouth size in porous supports and defects in dense composite membranes. This technique enhances the quality of palladium-based membranes crucial for hydrogen separation.
Area of Science:
- Materials Science
- Chemical Engineering
- Membrane Technology
Background:
- Porous support quality is critical for defect-free palladium-based composite membranes used in hydrogen separation.
- Current methods for characterizing pore mouth size and membrane defects are limited in convenience and effectiveness.
Purpose of the Study:
- To introduce a novel, convenient, and effective method for characterizing pore mouth size distribution in porous supports.
- To enable the assessment of defect distribution in dense palladium-based composite membranes.
Main Methods:
- Modification of conventional liquid-liquid displacement porometry.
- Utilizing the Young-Laplace equation to determine pore mouth size based on liquid pressures and interfacial tension.
- Experimental validation using model samples.
Main Results:
- The novel method provides accurate pore mouth size distribution for porous supports.
- The technique effectively characterizes defect distribution in dense composite membranes.
- Results are consistent with those obtained from Field Emission Scanning Electron Microscopy (FESEM), Atomic Force Microscopy (AFM), and conventional porometry.
Conclusions:
- The developed method offers a valuable tool for surface coating and dense membrane defect modification.
- This technique has broad potential applications in membrane science and engineering.
- Improved characterization will lead to higher quality composite membranes for hydrogen separation.
