期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 221, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2022.109350
关键词
Conjugated microporous polymers; Polypyrrole; Sulfonic acid doping; Microwaves absorption; Polymer nanocomposites
资金
- National Natural Science Foundation of China [11975124, 51702161]
- Fundamental Research Funds for the Central Universities [30920041103, 30920021107]
This study presents a strategy for the fabrication of polypyrrole/sulfonic acid doped microporous polyphenylene (PPy/SMPP) composites using post-functionalized microporous polyphenylene (MPP) as templates. The controlled growth of PPy in MPP nanochannels directs the formation of a unique microstructure, resulting in superior microwave absorption performance.
The development of novel high-performance microwaves absorption (MA) materials is of great importance. In this work, we report a skillful strategy for the fabrication of polypyrrole/sulfonic acid doped microporous polyphenylene (PPy/SMPP) composites using post-functionalized microporous polyphenylene (MPP) as templates for the growth of PPy. The doped sulfonic acid groups have successfully directed PPy to grow controllably in MPP nanochannels, constructing a unique microstructure in which MPP nanoparticles are connected by PPy. The appropriate electrical conductivity, coupled with the improved polarization loss and impedance matching, enabled superior MA performance of PPy/SMPP composites. As a result, with the filler-loading ratio of only 10 wt%, optimal MA performance value of 56.3 dB at 8.04 GHz was achieved for a PPy/SMPP composite, even outperforming pure PPy. This work provides a new idea for the design of CMP-based composites and paves the way for their functional expansion.
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