蒙烯玻璃纤维布是一种采用化学气相沉积技术将石墨烯薄膜包覆在玻璃纤维表面制成的复合材料,其电加热性能表现优异.为了研究蒙烯玻璃纤维布电加热性能,推动其在航空、航天、风电等领域的应用,对呈现不同面电阻阻值的蒙烯玻璃纤维布进行了电加热性能的测试.结果表明,在宏观层面上,蒙烯玻璃纤维布颜色均匀,无明显色差,编织丝束间呈方形孔,且孔径均一,分布均匀,单丝纤维直径 7.5 μm,其中单束丝束共有 312 根单丝,丝束间方孔间距在 430.27～438.34 μm,捻度控制在 70 捻左右;在微观层面上,通过场发射环境扫描电子显微镜(SEM)可以看到石墨烯均匀的覆盖在纤维布丝束表面,无起皮、包覆不完全、褶皱等现象,其单丝表面光滑洁净,而拉曼光谱仪(Raman)观察到了石墨烯明显的 2D 和 G 峰.通过施加直流电研究蒙烯玻璃纤维布的电加热性能,当施加相同的电压时,面电阻越低,升温速率越快,电加热温度稳定值也越高;在 270 V 直流电压下,150 Ω/□的蒙烯玻璃纤维布的电加热温度可以快速稳定在 543℃,升温速率可达 185.1℃/s;而对于面电阻较大的蒙烯玻璃纤维布来说,相同电压下温度稳定值和升温速率均呈大幅下降趋势,且不同面电阻规格的蒙烯玻纤布的面电阻与电加热温度呈负相关;在不同额定电压下的电加热性能显示,施加在蒙烯玻纤布上的输入电压与电加热温度呈正相关.
Study on electrical heating properties of graphene-skinned glass fiber
The glass fiber cloth is a kind of composite material made of graphene and glass fiber.The covering rate of graphene on glass fiber is more than 99%,so it is an excellent electric heating material.In order to stud-y the electrical heating properties of the glass cloth made of montmorillonite and promote its application in relat-ed fields,the electrical heating properties of the glass cloth made of montmorillonite with different surface re-sistance values were tested.The results show that,on the macroscopic level,the monofilament fiber is 7.5 μm in diameter.The color of the monofilament fiber is uniform and the color difference is not obvious.There are 312 monofilaments in a single tow,the space between square holes is 430.27-438.34 μm,and the twist is con-trolled at about 70 twist.At the micro-level,shown by the scanning electron microscope,the surface of the tow is covered evenly by graphene,not flaky,incomplete or wrinkled,and the surface of the monofilament is smooth and clean while the obvious 2 D and G peaks were observed by Raman spectroscopy.The results show that the lower the surface resistance is,the faster the heating rate is,and the higher the stability of the electric heating temperature is.The electrical heating temperature of 150 Ω/□ graphene-skinned glass fiber cloth can be rapidly stabilized at 543℃,and the heating rate can reach 185.1℃/s.For the graphene-skinned glass fiber cloth with large surface resistance,both the temperature stability and the temperature rise rate show a signifi-cant downward trend at the same voltage,and the surface resistance of different surface resistance specifications of graphene-skinned glass fiber cloth is negatively correlated with the electric heating temperature.There is a positive correlation between the input voltage and the electric heating temperature.
万方数据
维普
