关键词: 脱脂, 微波, 马尾松, 模型

Abstract:

In this paper, based on analysis of force in resin cell of masson pine during the microwave deresination, a theoretical model to predict the critical temperature conditions of wood microwave deresination has been established, and its mathematical simulation has been conducted. The results show that: in microwave deresination, the tangential and longitudinal stress will exist in resin cell wall, in which the tangential stress is double that of the longitudinal. At the preliminary stage, the pressure in cell lumen increase obviously, but the cell wall elongation increase slowly. When the inner pressure is increased to a certain degree, its change will be gentle, but the elongation will be increased rapidly, appearing “yield” phenomenon, till the wood resin cells are destroyed； In order to acquire high deresination rate, the minimum critical temperature should be controlled in the range of 134.0～140.2 ℃ during the microwave deresination.

Key words: deresination, microwave, masson pine, model