Microwave Absorbing properties of metal functionalized-CNT-polymer composite for stealth applications.
Microwave Absorbing properties of metal functionalized-CNT-polymer composite for stealth applications.
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DOI：
10.1038/s41598-020-72928-1
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发表时间：
2020-09-29
影响因子：
4.6
通讯作者：
Vukadinovic N
中科院分区：
文献类型：
--
作者：
Hussein MI;Jehangir SS;Rajmohan IJ;Haik Y;Abdulrehman T;Clément Q;Vukadinovic N
在这项研究中，我们报告了以金属或金属合金氧化物功能化并嵌入聚氨酯基体的多壁碳纳米管（MWCNT）复合材料的电学性能，以开发一种用于微波吸收和屏蔽的轻质材料。碳纳米管纳米颗粒与三种不同浓度的金属氧化物（如氧化钴、氧化铁和氧化钴铁）功能化。金属氧化物的使用浓度分别为碳纳米管总重量的5%、10%和20%。将得到的功能化碳纳米管以复合材料总重量的5%重量与聚氨酯聚合物混合。开发了三组圆柱形样品，每组样品含有三种不同的金属氧化物浓度。利用开放式同轴探针技术在5 ~ 50 GHz频谱范围内测量了9种样品的介电常数谱，得到了样品的介电特性。然后通过计算法向入射的反射损失得到复合材料的吸收效率。结果表明，可以通过改变碳纳米管浓度和材料厚度来调节吸收光谱范围。不同合金金属氧化物的功能化碳纳米管提高了聚氨酯/碳纳米管复合材料的吸收效率。这种功能化复合材料可用于替代微波应用中常用的重量级材料。
In this study, we report on the electrical properties of multi-wall carbon nanotubes (MWCNT) composites functionalized with metal or metal alloy oxides and embedded in a polyurethane matrix to develop a lightweight material for microwave absorption and shielding. The CNT nanoparticles are functionalized with metallic oxides such as Cobalt oxide, Iron oxide, and Cobalt Iron oxide, at three different concentrations. Metallic oxides are used at 5%, 10%, and 20% concentration of the total CNT percentage weight. The resulting functionalized CNT is mixed with polyurethane polymer at 5% wt of the total composite weight. Three sets of cylindrical samples are developed, and each set contains three different metal oxide concentrations. The dielectric properties of the nine developed samples are obtained by measuring their permittivity spectra using an open-ended coaxial probe technique in the spectral range 5–50 GHz. The absorption efficiency of the composites is then obtained by calculating the reflection loss at normal incidence. The results show that the spectral range of absorption can be tuned by changing the CNT concentration, and the material thickness. Functionalized CNT with different alloyed metal oxides enhanced the absorption efficiency of the polyurethane/CNT composites. Such functionalized composites can be used to replace the common heavyweight materials used for microwave applications.
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DOI：
10.1590/s1516-14392013000600012
发表时间：
2013-01-01
期刊：
Materials Research
影响因子：
--
作者：
Silva, Valdirene Aparecida;Folgueras, Luiza de Castro;Costa, Michelle Leali
通讯作者：
Costa, Michelle Leali
影响因子：
6.2
作者：
Zhao, Dong-Lin;Zhang, Ji-Ming;Shen, Zeng-Min
通讯作者：
Shen, Zeng-Min
影响因子：
64.8
作者：
IIJIMA, S
通讯作者：
IIJIMA, S
影响因子：
3
作者：
Sui, Jiehe;Zhang, Cheng;Cai, Wei
通讯作者：
Cai, Wei
影响因子：
4
作者：
Lv, Ruitao;Kang, Feiyu;Wu, Dehai
通讯作者：
Wu, Dehai