たばこ刻みの微細構造と吸着水の存在形態

概要

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The pore-size distribution and the state of water adsorbed on tobacco cut-fillers were examined by a nitrogen adsorption method and differential scanning calorimetry. The pore-size was distributed in the region of 1 to 5 nm in radius, and the population was the maximum at approximately 2 nm in radius. The results of differential scanning calorimetry showed that the amounts of nonfreezing water in Bright and Burley tobacco were 0.24 and 0.20 [kg of adsorbed water/kg of dry tobacco], respectively. These values well agreed with the amounts of water at adsorption equilibria at p/p°=0.8. The calculated thickness of the adsorbed water layer was 0.55 nm corresponding to that of 2 molecular layers, and most of the micro-pores in tobacco cut-fillers were considered to be filled with water at p/p°=0.8. Freezing water is surmised to be that of multi-layer adsorption.
社団法人日本農芸化学会の論文
1995-10-01