PENGARUH PERLAKUAN VAKUM TERHADAP ABSORPSI AIR OLEH KAYU DALAM PROSES RENDAMAN DINGIN
ABSTRACT: Indonesia has
various hardwood species which are known for their low permeability, means
difficult to be flown by fluid. The
fluid absorption into wood is important especially in preservative treatments,
in the treatment before slicing wood sampels for wood anatomy and in wetting
air dried wood sampels for specific gravity analyses.
The low water absorption of wood are caused by the air presence in cell
lumen which could block the water absorption into wood, and anatomy structure
of wood itselves. One methode to
overcome this problem was vacuum treatment.
The aim of this research was to increase water absorption in cold water
soak methode in 6 wood species (Pterocarpus indicus Willd, Nephelium lappaceum
L., Artocarpus heterophyllus Lamk., Paraserianthes falcataria L., Shorea
spp, Dipterocarpus spp) through vacuum
treatment. The size of wood samples
were 5 x 5 x 20 cm for cross section
orientation, 5 x 5 x 10 cm for radial and tangential orientation with 3
replicants. These wood samples were
treated with 5 different treatments : vacuum treatment for 1 hour and cold
water soak process for 24 hours (V), vacuum treatment for 2 hours and cold
water soak process for 24 hours (VV), vacuum treatment for 3 hours and cold
water soak process for 24 hours (VVV), vacuum treatment for 1 hour, cold wtaer
soak for 1 hour, and vacuum treatment again for 1 hour and cold water soak
process for 24 hours (VRV), dan vacuum and soaking treatment simultaneously for
5 hours and cold water soak process for 24 hours (VRVRV) and as control,
without vacuum treatment, just cold water soak process for 24 hours.
The results of this research showed vacuum treatment could increase water
absorption. The highest value of
moisture content was obtained at cross section direction in all wood species,
followed by tangential and radial direction.
However, every wood species showed different reactions to these five
different treatments.
Penulis: Istie SEKARTINING
RAHAYU, Zahrial COTO
Kode Jurnal: jpkehutanandd080045
