杉木-纳米ZnO复合材料结构表征与分析

摘要

The shape and situation of nano-ZnO particles is characterized by laser-sizing instrument, SEM and TEM etc; and the structure of the Chinese fir/nano-ZnO composite is characterized and analyzed along with XRD and EDXA (XPS spectrum) , FTIR and/or other spectroscopy etc. The results show that nano-ZnO particles locate on the cell-walls of the wood and the edges of pits, and can be easily combined firmly with hydroxide radicel, diacetyl and carbox-yl etc in the wood, by the un-saturation groups on the surface of nano-ZnO particles. Some other nano-ZnO particles are located at the nano-space inside the wood, such as located between micro-fibrils. The interfaces disappear for the wholly or partly so as to improve the properties of the the Chinese fir/nano-ZnO composite.%通过激光粒度仪、SEM、TEM表征纳米ZnO粒子形貌，并结合XRD、能量弥散X射线谱(EDXA)和傅立叶变换红外光谱等分析杉木-纳米ZnO复合材料的结构。结果表明：纳米ZnO粒子呈絮状分布于杉木木材细胞壁、纹孔口边缘等处；能与木材组分大分子链上的羟基、乙酰基及羧基等活性基团形成结合；另有部分以物理方式充填于木材的纳米空间，如其微纤丝非结晶区等处；纳米ZnO粒子与木材组分两相间界面完全或部分消失，可使该复合材料性能显著提高。