Microcrystalline cellulose powders: structure, surface features and water sorption capability

Characterization of an Avicel PH 102 MCC powder through polymerization degree determination, Xray diffraction and N₂ adsorptions at subcritical temperatures is described. Specific characterizations of MCC/H₂O exchange in different environments were performed by means of thermogravimetric weight losses on time/temperature scale and analyses of water adsorption/absorption from saturated vapors at 310K. The reversibility of MCC/H₂O interactions and the influence of different surface area probes on the specific surface area are discussed.