INVERSE GAS CHROMATOGRAPHY AS A TOOL TO CHARACTERIZE THE SPECIFIC SURFACE AREA OF CELLULOSE FIBERS

摘要

The present paper discusses the use of Inverse Gas Chromatography (IGC)in characterizing the specific surface of cellulose fibers.Thus,the adsorption capacities of microcrystalline Avicel and of the fibers obtained from bleached kraft hardwood (BHK)were determined,which permitted calculation of the specific surface area of these materials by applying both the Brunauer-Emmett-Teller (BET)equations and the iterative approach.Measurements were carried out in finite concentration conditions.The values obtained,agreeing with those reported in the literature for similar materials,were of about 1.4 and 1.2 m~2/g,for Avicel and BHK fibers,respectively.