Abstract:

This paper studied on the effort of pre-freezing process on wood drying and collapse properties, analyzed the regulations of the size changing of cell lumen and cell wall caused by free water in pre freezing process, and calculated the extension to which the cell wall intension increased theoretically,as Populus ussuriensis to be material. By using electronic microscope,the effect of freezing process on the cell wall structure was studied, and the mechanism on how pre-freezing deleted wood collapse was discussed. The results showed that freezing treatment could reduce collapse.

Key words: Pre-freezing, Collapse, Mechanism