论文标题
用碳纳米管复合材料对去角质石墨的非平稳性热物理表征
Non-stationary thermophysical characterization of exfoliated graphite with carbon nanotubes composites
论文作者
论文摘要
使用化学（CO）和电化学（阳极）氧化（ECAO）获得热去角质石墨（TEG）碳纳米管（CNT）复合材料（TEG CNT CS）的样品。电子显微镜揭示了几层石墨烯纳米片的多层结构，具有折叠和管状片段。电子显微镜揭示了几层石墨烯纳米片的多层结构，具有折叠和管状片段。通过使用热脉冲和热波调制方法，通过非平稳的光 - 型热电物特性来估计有效的热扩散率值。与其他碳（C）的热管理材料进行比较表明，TEG CNTC表现出与实际C聚合物和C C复合材料相当的热扩散率，积液和电导率。对于TEG CNT CS，评估的声子平均自由路径（MFP）和松弛时间（RT）的值估计为缺陷石墨烯。对于通过ECAO获得的较密集的CNT CS的扩散率和积极性值，MFP和RT的值较低，对于通过CO获得的密度较低的TEG CNT CS较高。获得的扩散率和积分值将TEG CNT CNT CNT CNT CNT CNS指定为合适的热管理材料。
The sheet samples of thermally exfoliated graphite (TEG) carbon nanotubes (CNT) composites (TEG CNT cs) were obtained by persulphate oxidation using chemical (CO) and electrochemical (anode) oxidation (ECAO). Electron microscopy reveals multi layered structures of few layer graphene nanosheets with folded and tubular like fragments.Electron microscopy reveals multilayered structures of few layer graphene nanosheets with folded and tubular like fragments. The effective thermal diffusivity values were estimated by nonstationary photo-pyroelectric thermophysical characterization using the heat pulse and thermo-wave modulation methods. Comparison with other carbon (C) based thermal management materials shows that TEG CNTcs exhibit thermal diffusivity, effusivity and conductivity comparable with those of actual C polymer and C C composites. For TEG CNT cs, evaluated values of phonon mean free path (MFP) and relaxation time (RT) are in the ranges estimated for defective graphene. The values of diffusivity and effusivity, MFP and RT are lower for denser TEG CNT cs obtained by ECAO and are higher for less dense TEG CNT cs obtained by CO. The obtained diffusivity and effusivity values designate TEG CNT cs as suitable thermal management materials.
