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首页> 外文期刊>ACS applied materials & interfaces >Synthesis of Polymer-Derived Ceramic Si(B)CN-Carbon Nanotube Composite by Microwave-Induced Interfacial Polarization
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Synthesis of Polymer-Derived Ceramic Si(B)CN-Carbon Nanotube Composite by Microwave-Induced Interfacial Polarization

机译:微波诱导的界面极化法合成聚合物衍生的陶瓷Si(B)CN-碳纳米管复合材料

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摘要

We demonstrate synthesis of a polymer-derived ceramic (PDC)-multivfall carbon nanotube (MWCNT) composite using microwave irradiation at 2.45 GHz. The process takes about 10 min of microwave irradiation for the polymer-to-ceramic conversion. The successful conversion of polymer coated carbon nanotubes to ceramic composite is chemically ascertained by Fourier transform-infrared and X-ray photoelectron spectroscopy and physically by thermogravimetric analysis and transmission electron microscopy characterization. Frequency dependent dielectric measurements in the S-Band (300 MHz to 3 GHz) were studied to quantify the extent of microwave-CNT interaction and the degree of selective heating available at the MWCNT-polymer interface. Experimentally obtained return loss of the incident microwaves in the specimen explains the reason for heat generation. The temperature-dependent permittivity of polar molecules further strengthens the argument of internal heat generation.
机译:我们展示了使用2.45 GHz微波辐射合成的聚合物衍生的陶瓷(PDC)-多重碳纳米管(MWCNT)复合材料。该过程需要约10分钟的微波辐照才能完成聚合物到陶瓷的转化。通过傅立叶变换红外和X射线光电子能谱化学确定聚合物涂覆的碳纳米管成功地转换为陶瓷复合材料,并通过热重分析和透射电子显微镜表征在物理上成功确定聚合物涂覆的碳纳米管成功转换为陶瓷复合材料。研究了S波段(300 MHz至3 GHz)中随频率变化的介电测量结果,以量化微波与CNT相互作用的程度以及在MWCNT-聚合物界面处可用的选择性加热程度。通过实验获得的样品中入射微波的回波损耗解释了产生热量的原因。极性分子随温度变化的介电常数进一步加强了内部热量产生的论据。

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