活化木材陶瓷的制备及其孔隙结构表征  

Preparation and pore structure characteration of activated woodceramics

作　　者：孙德林[1] 余先纯[1] 孙德彬[1] 郝晓峰[1] 陈新义 陈美业 SUN Delin;YU Xianchun;SUN Debin;HA;CHEN Xinyi;CHEN Meiye(College of Material Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China)

机构地区：[1]中南林业科技大学材料科学与工程学院,湖南长沙410004

出　　处：《中国粉体技术》2017年第5期13-18,共6页China Powder Science and Technology

基　　金：国家自然科学基金项目;编号:31670572;31270611

摘　　要：以KOH为活化剂对以松木粉和液化木材为主要原料制备的木材陶瓷进行活化,用低温氮吸附法和扫描电镜(SEM)研究活化温度对其孔隙结构的影响。结果表明:木材陶瓷孔隙为典型的H3型结构,活化处理能够大量增加介孔与微孔,孔径多分布在1.7~2.6 nm,同时部分保留木材天然结构特征;随活化温度的增大,比表面积先增大后减小,孔径呈现先减小后增大的趋势,但活化温度对微孔的孔径影响较小;经过1 300℃活化处理60 min,活化木材陶瓷的比表面积可达1 044.0 m2·g-1。Woodceramics which was prepared from pine wood powder and liquefied wood as principal raw materials were activated with KOH as activator, and the low-temperature nitrogen adsorption method and scanning electron microscope（SEM） were employed to survey and observe the effects of activating temperature on the pore structure. The results show that the activating treatment can greatly increase the mesopore and micropore. Its pore structure is a typical H3 type, and most pore diameter distributes in 1.7~2.6 nm, and it still keeps the native pore structure of wood. As the activating temperature raise, the special surface area shows increase at first and then decrease, as well as the pore diameter presents the tendency of decrease at first and then increase. But the activating temperature almost has no effects on the pore diameter of micropore. The special surface area can reach 1 044.0 m2·g-1 as the sample deal with 1 300 ℃ activated temperature and 60 min activated time.

关 键 词：木材陶瓷 高温活化 孔结构分析 

分 类 号：TH117[机械工程—机械设计及理论]