摘要
课题组通过对废弃叶片中的聚氯乙烯(PVC)、聚对苯二乙二醇酯(PET)和轻木三种芯材进行炭化处理,研究不同气氛和不同热处理温度对炭化芯材样品的相组成与微观结构的影响,采用扫描电子显微镜(SEM)、X射线衍射分析仪(XRD)、红外光谱等分析手段,表征芯材炭化样品的组成、形貌特征及化学官能团.实验结果表明:400 ℃热处理温度下,三种炭化芯材物相主要组成均为无定形碳,PET芯材炭化后未保留其多孔特征,PVC和轻木炭化后较好地保留了其多孔特性;热处理温度对炭化芯材的物相组成没有明显影响;氮气氛围有利于炭化芯材形貌的完整,600 ℃炭化PVC芯材和500 ℃炭化轻木芯材孔道结构相对最佳.
Abstract
The group carbonized three kinds of core materials,namely,polyvinyl chloride(PVC),polyethylene terephthalate(PET)and balsa wood,from waste leaves,and investigated the effects of different atmospheres and different heat treatment temperatures on the phase compositions and microstructures of the carbonized core samples,and characterized the carbonized core samples by scanning electron microscopy(SEM),X-ray diffraction(XRD),infrared spectroscopy scanning and testing and other analytical means.The samples were characterized by scanning electron microscope(SEM),X-ray diffraction analyzer(XRD),infrared spectroscopy scanning test and other analytical means to characterize the composition,morphological features and chemical functional groups of the core material carbonization.The experimental results showed that:at 400 ℃,the phase composition of the three kinds of carbonized cores were graphitic carbon and amorphous biomass carbon,the PET core did not retain its porous characteristics after carbonization,and the PVC and balsa wood retained their porous characteristics after carbonization;the heat treatment temperature had no obvious effect on the phase composition of the carbonized cores;the nitrogen atmosphere was conducive to the integrity of the morphology of the carbonized cores,and the charring of the PVC core and balsa core at 600 ℃ and 500 ℃,respectively,had no significant effect on the phase composition of the carbonized cores.
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