Preparation of MWNT-g-poly(2,5-benzoxazole) (ABPBO) with excellent electromagnetic absorption properties in the Ku band via atom transfer radical polymerization (ATRP)
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- 作者：Jia Wei ; Xiaoyun Liu ; Zhong-Kai Cui ; Jinlou Gu ; Xinxin Li…
- 刊名：Journal of Materials Science
- 出版年：2016
- 出版时间：August 2016
- 年：2016
- 卷：51
- 期：15
- 页码：7370-7382
- 全文大小：2,261 KB
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Materials Science
Characterization and Evaluation Materials
Polymer Sciences
Continuum Mechanics and Mechanics of Materials
Crystallography
Mechanics - 出版者：Springer Netherlands
- ISSN：1573-4803
- 卷排序：51
文摘
A novel approach is developed to study the electromagnetic wave absorption properties based on chemical molecular structure in this work. The MWNT-g-ABPBO composite with core–shell structure, initiated by macromolecule MWNT-benzocyclobutene(ethyl 2-bromoisobutyrate) (MWNT-BCB(EBIB)) via ATRP method, exhibits outstanding electromagnetic wave absorption properties in the Ku band. Traditionally, the electromagnetic wave absorption occurs around the wavelength of 3 cm (at 8 GHz), while the studies on materials with absorption properties at the wavelength slightly under 1.5 cm (at 20 GHz), namely part of the Ku band, are limited. The absorption peak of MWNT-g-ABPBO composite, with the thickness of 2.8 mm, can reach −36 dB at 17.4 GHz, because of the excellent impedance matching between the initiator and monomers bearing highly conjunction chemical structure introduced by ATRP. Meanwhile, the maximum reflection loss (RL) was −47 dB at the frequency of 15.5 GHz and the effective absorption bandwidth (<−10 dB) is from 13 to 18 GHz.Electronic supplementary materialThe online version of this article (doi:10.1007/s10853-016-0027-0) contains supplementary material, which is available to authorized users.