中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 二氧化硅联合热处理改性对橡胶木性能的影响 林业工程学报 2019 (2) 38-42
Position: Home > Articles > Effects of silicon dioxide combined heat treatment on properties of rubber wood Journal of Forestry Engineering 2019 (2) 38-42

二氧化硅联合热处理改性对橡胶木性能的影响

关键词：
橡胶木;木材热处理;二氧化硅;力学性能;吸水性;热稳定性
摘  要：
为弥补热处理材的力学性能损失,利用二氧化硅联合热处理改性橡胶木。在热处理橡胶木前后分别真空浸渍二氧化硅前躯体溶液,热处理温度200℃,保温时间2 h。对未处理材、热处理材、浸渍-热处理材与热处理-浸渍材的力学性能、尺寸稳定性以及热稳定性进行对比分析。结果表明,与热处理材相比,浸渍-热处理材与热处理-浸渍材的抗弯强度分别提高28.97%和18.88%,抗压强度分别提高26.65%和38.91%。与未处理材相比,热处理材、浸渍-热处理材和热处理-浸渍材的吸水性与湿胀性均有所降低。热重分析表明,浸渍热处理材的热降解速率低于热处理材,说明二氧化硅与木材的结合阻碍了热分解以及木质基的完全裂解,木材的热稳定性有所提高。红外光谱分析显示,浸渍-热处理材上出现了Si—O—Si特征峰,说明木材内部有二氧化硅生成。X射线衍射分析结果表明,木材的纤维素衍射峰位置无变化,说明浸渍二氧化硅处理未破坏纤维素的结晶结构。
译  名：
Effects of silicon dioxide combined heat treatment on properties of rubber wood
作  者：
ZHANG Nannan;XU Min;College of Materials Science and Engineering,Northeast Forestry University;
关键词：
Hevea brasiliensis;;heat treatment of wood;;silicon dioxide;;mechanical properties;;hygroscopicity;;thermal stability
摘  要：
Heat treatment is considered as an eco-friendly wood modification process,which improves the dimensional stability and durability of wood. At the same time,the chemical composition of wood is changed during the heat treatment,resulting in the loss of mechanical properties. Therefore,it is necessary to compensate for the decrease of wood mechanical properties caused by the heat treatment. In order to alleviate the mechanical properties loss of heat-treated wood,the heat treatment was combined with the silicon dioxide treatment to modify rubber wood. The silica precursor solution was prepared by the sol-gel method,and wood samples were vacuum-impregnated by the silica precursor solution before and after the heat treatment. The heat treatment was performed at 200 ℃ for 2 h. The mechanical,dimensional stability and thermal stability of the untreated,heat-treated,impregnation before and after heat treatment samples were examined. The results showed that the modulus of rupture of the impregnated before heat treatment samples and the impregnated after heat treatment samples increased by 28.97% and 18.88%,respectively,and the compression strength increased by 26.65% and 38.91%,respectively. Compared with the untreated wood,the hygroscopicity and thickness swelling properties of the heat-treated wood both reduced,which was slightly different from that of the impregnated before and after heat treatment wood. The results of thermogravimetric analysis showed that the thermal degradation rates of the impregnated before heat treatment samples were lower than that of the heat-treated samples,indicating that the thermal stability of the wood was improved. The results of Fourier transform infrared spectroscopy showed that the Si—O—Si characteristic peak appeared on the impregnated before heat treatment wood,indicating that silica dioxide was formed in the wood. The results of X-ray diffraction showed that the impregnated silica had little effect on the crystalline structure of wood. The application of silica nanosols on heat-treated wood could lead to the improvement of the mechanical properties and thermal stability,as well as the dimensional stability,which may be further considered as an efficient method to extend the utilization of heat-treated wood.

相似文章

导出引用
计量
文章访问数: 12
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46