Dielectric Relaxation of Adsorbed Water in Wood Cell Wall under Equilibrium and Non-Equilibrium State

This article summarized systematically the previous investigations on the dielectric relaxation of wood, the main substances and extractives in wood at oven-dry state, and the dielectric relaxation based on the adsorbed water in wood cell wall under equilibrium and non-equilibrium state. Moreover, some expectations for future research were proposed on this basis. The purpose of this article is to provide other researchers an overall understanding about the research in this region, and further to promote the research onto a new and higher level.