活化木材陶瓷的制备及其孔隙结构表征

发布时间：2018-02-24 08:20

  本文关键词： 木材陶瓷 高温活化 孔结构分析　出处：《中国粉体技术》2017年05期 　论文类型：期刊论文

【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。
[Abstract]:Wood ceramics prepared from pine powder and liquefied wood were activated with KOH as activator. The effect of activation temperature on pore structure was studied by low temperature nitrogen adsorption and scanning electron microscopy (SEM). The results show that the pore of wood ceramics is a typical H3 structure, and activation treatment can greatly increase the mesoporous and micropores. With the increase of activation temperature, the specific surface area first increases and then decreases, the pore size decreases first and then increases, but the activation temperature has little effect on the pore size of the micropores. After activation at 1 300 鈩，

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