文献类型：期刊文献

中文题名：酸、碱硅溶胶改性木材的制备与性能研究

英文题名：Preparation and Properties of Wood Modified with Acidic and Alkaline Silica Sols

作者：石媛[1] 刘君良[1] 吕文华[1] 汪嘉君[1] 倪林[1]

第一作者：石媛

机构：[1]中国林科院木材工业研究所,北京100091

年份：2019

卷号：33

期号：1

起止页码：21-24

中文期刊名：木材工业

外文期刊名：China Wood Industry

收录：CSTPCD;;北大核心:【北大核心2017】；

基金：中央级公益性科研院所基本科研业务费专项"高活性硅溶胶改性木材性能与应用研究"(CAFYBB2017MB016)

语种：中文

中文关键词：硅溶胶;木材改性;弯曲性能;热解动力学;微观结构

外文关键词：silica sol;wood modification;bending property;thermogravimetric analysis;microstructure

分类号：S781.7

摘要：采用酸、碱性硅溶胶分别浸渍处理杨木,并测试未改性和改性材的微观结构、弯曲性能以及热降解性能。结果显示:硅溶胶可有效渗入并填充在改性木材的孔隙结构中;酸性硅溶胶改性材的抗弯性能增加,碱性硅溶胶改性材仅MOR增加,MOE则基本不变;改性材热降解残重增加,炭化温度降低,表观活化能提高,起到了阻燃效果。
Acidic and alkaline silica sols were used to impregnate wood samples.Then the wood sample's microstructure was observed using an SEM.Bending properties and thermal degradation properties of the wood samples were also tested.The results showed that silica sols could effectively permeate and fill into the sample's pore structure.Bending properties of the samples modified with acidic silica sols,increased more than those modified with alkaline silica sols.Thermal degradation residual weights increased with decreased carbonization temperature and increased apparent activation energy,which exhibited improved flame retardance.