碳纳米管/石墨/木塑复合材料的电磁屏蔽性能研究
伊犁师范大学, 化学与环境科学学院新疆普通高等学校天然产物化学与应用重点实验室, 新疆伊宁 835000
| 摘 要： | 近些年来，电磁辐射污染成为人们关注的问题之一。基于木塑复合材料，本文通过天然石墨（GR）和碳纳米管（CNTs），采用模压方法获得具有电磁屏蔽功能的木塑复合材料。采用万能材料试验机、微欧计和电磁屏蔽测量仪研究木塑复合材料的弯曲性能、电阻率和电磁屏蔽效能。结果表明石墨和CNTs呈现良好的协同效应。弯曲强度从55MPa增加到62MPa，弯曲模量从6380MPa提高到7129Mpa；复合材料的吸水率随着CNTs含量的增加而增加，但电阻率下降，达到0.023Ω.cm（10% CNTs）；电磁屏蔽效能则随着CNTs含量增加而增加；通过理论计算的电磁屏蔽效能与实验结果基本吻合；复合材料的电磁屏蔽效能从16 dB增加到35 dB，基本满足商业需求。 |
| 关 键 词： | 石墨; 碳纳米管; 电磁屏蔽; 木塑复合材料 |
| DOI： | 10.57237/j.mater.2023.01.001 |
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收稿日期: 2023-01-05
接受日期: 2023-02-25
在线出版日期: 2023-03-02
Study on Electromagnetic Interference Shielding Effectiveness of Carbon Nanotubes/Graphite/Wood Plastics Composites
University and College Key Lab of Natural Product Chemistry and Application in Xinjiang, School of Chemistry and Environmental Science, Yili Normal University, Yining 835000, China
| Abstract: | Recently, electromagnetic radiation pollution has become one of the problems that people pay attention to. In this paper, natural graphite and carbon nanotubes were used to produce wood plastics composites with electromagnetic shielding performance through a molding method. Flexural properties, electrical resistivity and electromagnetic shielding properties were studied using a material testing machines and EMI apparatus. The results showed that graphite and CNTs show a good synergistic effect. Flexural strength increased from 55 to 62 MPa and flexural modulus was elevated from 6380MPa to 7129MPa. The water absorption of composites increased as CNTs increased, whereas electrical resistivity decreased. The electromagnetic interference shielding effectiveness (EMI SE) increased as CNTs increased. By and large, the experimental results of EMI were equal to that of theoretical calculation. EMI SE of composite increased from 16 to 35dB due to the addition of CNTs, and these results could meet the requirement of commerce. |
| Keywords: | Graphite; Carbon Nanotubes; Electromagnetic Interference Shielding; Wood Plastics Composites |
基金
| 1. | 伊犁师范大学提升学科综合实力专项项目 (20220015) |
| 2. | 新疆维吾尔自治区教育厅天然产物化学与应用化学重点实验室开放课题 (2021YSHXZD03) |
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