木浆纤维素电子束辐射降解效应研究

Radiation Degradation Effect of Electron Beam on Wood Pulp Cellulose

系统研究了木浆纤维素受电子束辐射后聚合度、结晶度及化学结构的变化情况.电子束辐射可以有效降解木浆纤维素,降解程度随着吸收剂量的增加而增加,且存在电子束辐射降解后效应,约至7 d后,纤维素聚合度下降速度趋缓,约至12 d后效应基本终止;电子束辐射还可以使纤维素结晶度下降并产生少量的羰基、烯基等不饱和基团.

This paper systematically studies the changes of polymerization degree,crystallinity and chemical structure of wood pulp cellulose after the electron beam irradiation. Electron beam irradiation can effectively degrade the wood pulp cellulose. The degree of degradation increases with increase of absorbed dose,and there is the effect of electron beam radiation and degradation. After about 7 days,the cellulose polymerization degree decreases slowly. About 12 days later,the effect is substantially terminated. Electron beam irradiation can also lower the crystallinity of the cellulose and produce a small amount of unsaturated groups such as a carbonyl group or an alkenyl group.