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Surface Energy Analyzers (view source)
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'''Surface Energy Analyzer (SEA)''' is a new second generation Inverse Gas Chromatography (IGC)instrument. The SEA is an advanced instrumentation for the characterisation of particulates, fibres and thin-films. It opens up a whole new world of sorption solutions. These are some of the facilities that the Surface energy anlayzer provides: | |||
Surface Energetics | |||
Surface Energy Heterogeneity Mapping | |||
Unrivalled Accuracy | |||
Heats of Sorption | |||
Fully Automated | |||
Sorption Isotherms | |||
Humidity Control | |||
Phase Transitions | |||
Sample Preconditioning | |||
Diffusion Kinetics | |||
Wide Temperature Range | |||
Key properties measured by the | |||
SEA | |||
include surface energy acid-base parameters, energetic heterogeneity mapping, batch-to-batch variations in surface chemistry, glass transition temperatures, adhesion – cohesion thermodynamics, and solubility parameters and crosslink density. | |||
How does the Surface Energy Anlayzer (SEA) work? | |||
The SEA is based on Inverse Gas Chromatography (IGC) methodology and is a gas phase technique for characterising surface and bulk properties of solid materials. The principles of IGC are very simple, being the reverse of a conventional gas chromatographic (GC) experiment. | |||
A cylindrical column is uniformly packed with the solid material of interest, typically a powder, fibre or film. A pulse or constant concentration of gas is then injected down the column at a fixed carrier gas flow rate , and the time taken for the pulse or concentration front to elute down the column is measured by a detector. A series of IGC measurements with different gas phase probe molecules then allows access to a wide range of phyisco-chemical properties of the solid sample. | |||