Investigation on gradient dielectric characteristics of bamboo (Dentroclamus strictus)

Abstract

Dependence of dielectric constant (Ј) and dielectric dissipation factor (tan ␦) on distance from outermost skin to the center of bamboo has been determined. Dielectric measurements have been done in the temperature range of 24 -120°C and in the frequency range, 4 -100 kHz. Gradient behavior in Ј and tan ␦ has been found in bamboo. It has also been observed that Ј and tan ␦ increase with increasing temperature and decrease with increasing frequency. Relaxation times have been calculated for the four samples at 80, 90, and 100°C temperatures, which show that relaxation time decreases with the increase of temperature because of the increased molecular mobility. A continuous increase in the hardness from center (48) to outer surface (70) and density from 0.45 to 0.80 g/cc has been observed.

Associating cooking additives with sodium hydroxide to pretreat bamboo residues for improving the enzymatic saccharification and monosaccharides production

“…Bamboo is an economic forest and covers an area of 3.19 million hm 2 in China. In bamboo utilization industry, fractions of bamboo green, bamboo yellow, bamboo node, and bamboo branches are discarded due to the weakness in mechanical properties, generating approximately 46 million tons processing residues annually (Chand et al, 2006). However, only a part of these bamboo residues are burned to recover energy in industry.…”

Comparison of aqueous ammonia and dilute acid pretreatment of bamboo fractions: Structure properties and enzymatic hydrolysis

“…According to Chand et al (2006), bamboo stem is composed of bamboo skin, timber, and pith. There no vascular bundles exist in bamboo skin (the outer part) and pith (the inner part).…”

Bamboo Fiber Processing, Properties, and Applications

“…It is observed that nano grain structured fi bers are not brittle (Zou et al 2009 ). A continuous increase in hardness from center to outer surface is observed (Chand et al 2006 ). Hardness of bamboo fi bers is same in longitudinal as well as transverse directions.…”