SiO2溶胶空细胞法浸渍处理木材工艺

Process of SiO_2 Gels Impregnation Wood by Lowry Method

对SiO2溶胶溶液半限注法浸渍处理紫椴和西南桤木的工艺进行研究。结果表明:SiO2溶胶对木材的渗透应主要考虑压力和加压时间以及树种的影响,考虑木材的变异性所造成的试验数据的波动,确定SiO2溶胶的浸渍工艺条件为压力0.8MPa,压力时间30min,后真空度为0.090MPa,保持10min。通过X射线能谱图分析,在木材细胞壁的位置能看到排列均匀的SiO2,说明在木材外部进行溶胶-凝胶化过程,然后采取空细胞法将溶胶注入到木材中,简化了制备工艺条件,提高了原料利用率。

Process of SiO2 gels impregnation basswood and alder wood by lowry method were researched in this paper. The results show that the main factor affected SiO2 gels impregnation is press, press time and category of wood. The variation of wood affect fluctuating data being considered. Process of SiO2 gels impregnation wood press is 0.8 MPa, press time is 30 min, vacuum is 0.090 MPa, vacuum time is 10 min. According to scanning electron microscope-energy dispersive X-ray analysis, the uniformity of SiO2 aerogel can be found in wood ceils that showed the Sol-Gel process can be done out of wood then impregnating into the wood by lowry method as well as utilizing wood bound water method. The SiO2 gels in-situ reaction form wood-SiO2 aerogel composites predigest the fabrication process greatly and used raw material very well than before.