材料科学
静电纺丝
拉曼光谱
差示扫描量热法
碳化
傅里叶变换红外光谱
扫描电子显微镜
热重分析
碳纳米纤维
木质素
纳米纤维
碳纤维
化学工程
核化学
复合材料
碳纳米管
有机化学
聚合物
化学
复合数
物理
光学
热力学
工程类
作者
Isabela L. R. Cintra,Maurício Ribeiro Baldan,Erick Gabriel Ribeiro dos Anjos,Thais F. Silva,Lília M. Guerrini,Mirabel Cerqueira Rezende,Edson Cocchieri Botelho
摘要
Abstract Blankets based on blends with different PAN/lignin ratios (10 and 50% wt. of lignin) were processed via electrospinning. Then, the blankets obtained were thermally treated in order to produce samples of carbon nanofibers. The thermo‐oxidative stabilization parameters were defined based on a 2 3 ‐factorial design. The samples, after stabilization, were analyzed by differential scanning calorimetry (DSC), thermogravimetry (TGA), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FT‐IR) techniques. Based on the results, the best parameters for the stabilization of electrospun, blankets were selected, and subsequently, the most adequate carbonization parameters were established to obtain the carbon blankets. The carbonized blankets were characterized for electrical conductivity by impedance spectroscopy, chemical structure (Raman and FT‐IR spectroscopies), crystallographic ordering by X‐ray diffraction (XRD), and morphology (SEM). The results showed the feasibility of producing carbon blankets based on PAN/lignin blends. However, carbonized blankets showed low carbon yield (10–56%) and a decrease of up to 70% in fiber diameter. XRD and Raman spectroscopy showed that the structural ordering of carbon blankets presents different values according to the heat treatment parameters used (45–57%) and a poorly ordered structure, indicated by the ID/IG ratio.
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