Surface analysis

Analyte:

• Solid samples with or without pores/cavaties
• Samples must be dry
• 0.5 – 3 g sample material (dependent of porosity)

Equipment:

• Sorptomatic 1990 (Fa. Thermo Electron Corporation, Milano, Italy)
• Physisorption: N2, Kr, He
• Two vacuum ovens for pre-treatment of samples with a choice of 3 temperature programming modes

Evaluation methods and targets:

• Determination of specific surface
  (> 0.2 m²/g with N2, > 0.005 m²/g with Kr)
• Determination of pore diameters and –distribution using different model calculations (ADP-Software)
• Registration of pores between 0.4 nm and 100 nm diameter
• Determination of pore volumes > 0.001 cm³/g

Application examples:

• Determination of specific surface, pore diameters and their distribution of aero-cellulose
• Determination of specific surface of foamed chitosans
• Determination of specific surface and micropores of cellulosic nano-particles