Effect of Heating Time to Density, Hardness, and Resistivity Againt Fungus of Yellow Bamboo (Bambusa Vulgaris Var Schard. Vitata)

摘要

It has been studied the influence of heating process to the density, hardness and resistivity againt fungus of Yellow bamboo (Bambusa Vulgaris Var Schard. Vitataj. Structure of bamboo is identified by optical microscope. Bamboo is heated at 100 °C with variation of heating time: 0, 1, 2, 3 and 4 hours. Density of bamboo is measured by using pyenometer, whereas hardness is measured by using a Rockwell Hardness Type-R (HRR). Resistivity againt fungus is observed by naked eye. OM image shows that bamboo consist of hollow structures wherein the water is stored. The diameter of vascular at inner part (~ 150 μm) is quite larger than outer part (~50 μm). Heating time of one hour caused density decrease by about 39%, whereas heating four hours will decrease by 52%. The longer heating time, the hardness of bamboo is increased. For the longitudinal side, two hours heating increased hardness up to 31%. For tangential side, four hours heating time increased hardness until 82% . Furthermore, heating time 3-4 hours will persist bamboo from fungus attack more than 14 days.