扫描热显微镜技术在生物质微观特性研究中的应用

摘要

为了探讨生物质材料微观导热性能,以红橡和稻草为研究对象,使用扫描热显微镜技术(SThM)研究2种生物质材料细胞壁层级的微观传热特性及微观结构特性。研究结果表明,SThM的热传导模式可以对生物质细胞结构进行较好的扫描成像,2种生物质细胞壁在横切面的导热特性近似,即细胞壁的胞间层( CML)导热性能明显低于S2层导热性能,电流值相差1μA左右。%The application of scanning thermal microscopy ( SThM ) technique in the studies of bio-composites interface characteristics and the thermal conductivity characteristics in micro-scale of biomass materials was discussed using red oak and rice straw cell as research objects. The results indicated that the thermal conductivity mode of SThM could imaged the microstructure of biomass cell very well, and the thermal conductivity characteristics of these two biomass were similar. This showed that the thermal conductivity of S2 layer was higher than that of middle lamella of cell wall( CML) .