摘要
随着不可再生资源持续消耗,可再生的生物质碳材料资源渐渐出现在人们视野中.本文选取日常易获取的木耳作为碳源,采用高温热处理制备木耳衍生生物质碳材料,研究不同热处理温度对材料微观形貌和吸波性能的影响,建立材料微观形貌和吸波性能之间的构效关系.得到结论如下:木耳衍生生物质碳材料中,大量的纳米棒相互交错,呈现灌木丛林状.内部富含介孔这是由于木耳在高温热处理碳化过程中,材料中含有的结合水和其他微量元素经过热蒸发去除造成的;样品的微波吸收性能随着热处理温度的变化而改变.热处理温度为700℃,厚度为4.98 mm时,样品在11.33 GHz波段处达到最低反射损耗值-41.14 dB,有效吸收带宽为0.75 GHz,具有最佳的电磁波吸收性能.
With the continuous consumption of non-renewable resources,renewable biomass carbon material resources have attracted the researchers′attentions.In this paper,the easily available agaric was selected as the carbon source,to prepare biomass carbon materials by a high-temperature heat treatment.The effects of different heat treatment temperatures on the micromorphology and microwave absorption properties of materials were studied.Finally,the structure-performance relationship between micromorphology and absorption properties of materials was established.The conclusions can be summarized as follows:In agaric-derived biomass carbon materials,a large number of nanorods are intertwined,showing a jungle shape.The interior is rich in mesopores,which is due to the fact that the bound water and other trace elements contained in the material are removed by thermal evaporation during the carbonization process of high temperature heat treatment.The microwave absorption performance of the sample changes with the change of heat treatment temperature.When the heat treatment temperature is 700℃and the thickness is 4.98 mm,the sample reaches the lowest reflection loss value of-41.14 dB at the 11.33 GHz,and the effective absorption bandwidth is 0.75 GHz,which has the best electromagnetic wave absorption performance.
作者
苏进步
徐玉意
杨锐
赵恒
谢雨浓
林许立
史晨毅
SU Jin-bu;XU Yu-yi;YANG Rui;ZHAO Heng;XIE Yu-nong;LIN Xu-li;SHI Chen-yi(School of Material Science and Engineering,Shaanxi University of Science&Technology,Xi′an 710021,China)
出处
《陕西科技大学学报》
北大核心
2024年第3期1-7,19,共8页
Journal of Shaanxi University of Science & Technology
基金
陕西省科技厅自然科学基础研究计划项目(2022JM-278)。
关键词
木耳
生物质碳材料
灌木丛状结构
微波吸收性能
agaric
biomass carbon materials
bush-like structures
microwave absorption performance
