硅凝胶植物纤维复合材料的微观构造

Microstructure of the composite made by silicate gel and plant fiber

将植物纤维基超低密度材料浸入硅溶胶中,采用溶胶—凝胶两步法制备具有良好物理性能的复合材料;采用扫描电镜(SEM)、X射线衍射仪(XRD)以及傅里叶红外光谱仪(FTIR)对复合材料的微观构造进行表征.结果表明:凝胶颗粒不仅覆盖、粘附在发泡材料的纤维表面,同时还填充在材料的内部孔隙中,使材料的密实化程度得到提高,衍射强度降低;同时,在复合材料中发现一些硅凝胶的疏水性基团.表明这种方法可提高材料的防水、防霉以及隔热、隔音等性能.

Plant fiber-based ultra-low density material was immersed into silicon sol to get one type of composite with good physical properties by a sol-gel two-steps method.Meanwhile,the microstructure of composite was characterized by scanning electron microscope （SEM）,X-ray diffractometer （XRD） and Fourier transform infrared spectrometer （FTIR）.The results were as follows：the surface of fiber was adhered and covered,interior pore was also filled by gel particles,so that the densification degree of ultra-low density material increased and diffracted intensity decreased; the hydrophobic groups from silicate gel were also observed after the composite formed.It was suggested that the properties such as resistance against water and mildew,and insulation from heat and sound were increased by the impregnation method.