Sorption characteristics of some commercial bamboo species in the Philippines
2014
Alipon, M.A. | Bondad, E.O.
The paper discusses the equilibrium moisture content (EMC) at various relative humidity (RH) levels, fiber saturation point (FSP), maximum moisture content (MC) and relative density (RD), as well as the sorption isotherms from the first and second sorption cycles of five Philippine commercial bamboo species. All the species studied belong to the family Poaceae: bolo (Gigantochloa levis (Blanco) Merr.), buho (Schizostachyum lumampao (Blanco) Merr.), giant bamboo (Dendrocalamus asper (Schultes f.) Backer ex Heyne), Kauayan kiling (Bambusa vulgaris Schrader ex Wendland) and Kauayan tinik (Bambusa blumeana J.A. and J.H. Schultes). Three poles per species were used. Each pole was cut into 20 equal parts where three samples (10 mm x 100 m x 20 mm each) per cut were taken. There were seven RH levels, with 20 samples per level. Among bamboo species, buho and Kauayan tinik had the lowest and highest relative density, respectively. The fiber saturation point of the bamboos ranged from 18.6 to 25% at approx 3.5 years old and 20.1 to 27.8% at approx 2.5 years old. The treatment of data using the theoretical model for wood derived by Hailwood and Horrobin, and Simpsons emphasized the applicability of the equations for evaluating the sorption phenomenon of bamboos.
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