碳化钛负载玻璃纤维材料制备与电磁屏蔽性能研究

Preparation and Electromagnetic Shielding Properties of Ti3C2Tx/ glass fiber Composites

摘要:

采用多巴胺对玻璃纤维织物改性处理和原位生成Ti3C2Tx MXene，通过真空抽滤法制备了碳化钛负载玻璃纤维复合材料，研究了碳化钛负载量对电磁屏蔽的影响。结果显示：成功地将Ti3C2Tx纳米片附着在玻璃纤维表面，改善了玻璃纤维的导电网络；刻蚀之后Ti3C2Tx的002衍射峰的位置从9.5 °移动到6.1 °，Ti3AlC2的104衍射峰峰消失不见，表明Ti3C2Tx刻蚀成功；由于碳化钛高导电性和表面的大量电子，电磁波和其发生欧姆损耗，从而降低电磁波能量，达到电磁屏蔽效果。在2~18 GHz频率范围内，碳化钛负载量为2.55 mg/cm2的电磁屏蔽性能达到55.1 dB，其表面电阻为0.95 ?/sq；平均电磁屏蔽表明样品中吸收损耗占主要作用。

Abstract:

The Ti3C2Tx MXene was successfully etched in situ HF method and modification of glass fiber fabric with dopamine. The Ti3C2Tx / glass fiber Composites composites were prepared by the vacuum filtration, the EMI SE of the samples with different Ti3C2Tx loading were studied in frequency range of 2–18 GHz. The results show that the Ti3C2Tx nanosheets are successfully attached to the surface of the glass fiber, which improves the conductive network of the glass fiber. After the etching by in-situ HF method, the 002 peak position was moved from 9.5 ° to 6.1 °, and 104 peaks of Ti3AlC2 disappeared, and the Ti3C2Tx etching was successful; Due to the high conductivity of Ti3C2Tx and a large amount of electrons on the surface, which induces that contribute to ohmic losses with electromagnetic waves, thereby reducing electromagnetic wave energy and achieving electromagnetic shielding effect. In the frequency range of 2~18 GHz, the electromagnetic shielding performance of the Ti3C2Tx loading of 2.55 mg/cm2 is 55.1 dB, and the surface resistance was 0.95 Ω/sq; the average electromagnetic shielding showed that the absorption loss in the sample played a major role.