Yang Zhang,Rui Feng,Zhuo Chen,Tingting Zhao,Yanyun Ju,Shengliao Yan,Shaokun Song,Guanghui Zhao,Lijie Dong
Polymer dielectrics have wide application in advanced electronic devices and pulsed power systems because of their easy processing, low cost, outstanding flexibility and high breakdown strength ( E b ). However, the low energy density ( U e ) of polymer dielectrics restricts the miniaturization and integration of dielectric capacitors. Herein, poly(1,4-anthraquinone) with rigid molecular chains was synthesized and introduced into poly(vinylidene fluoride) (PVDF). Benzene rings on the main chains and large steric hindrance in the side chains limit the intramolecular rotation and thus endow poly(1,4-anthraquinone) with rigid chain structure. Moreover, extended π system and delocalization of electrons minimize the energy of polymer chain, which gives poly(1,4-anthraquinone) more prominent durability and stability. The introduction of poly(1,4-anthraquinone) reduces the crystallite sizes of PVDF and strengthens Young’ modulus of the films. Consequently, both high E b and U e are achieved and increased by 170% and 62% compared with pristine PVDF, respectively. This research provides a new strategy to prepare PVDF-based dielectric film with superior energy storage performances.
Carbon capture is one of the important methods to achieve carbon neutrality. In this paper, a simple and reliable method for the preparation of poly(anthraquinone)/multi-walled carbon nanotube composites (PAQ/MWCNTs) for capturing carbon dioxide is proposed. Using constant magnetic stirring, 1,4-anthraquinone (1,4-AQ) was allowed to accumulate on multi-walled carbon nanotube (MWCNTs) substrates via π–π. The poly(anthraquinone)/multi-walled carbon nanotube composites were produced by this continuous process. Besides, the carbon cloth electrode prepared from PAQ/MWCNTs composites was subjected to redox potentials for carbon dioxide capture. Results showed that PAQ/MWCNTs composites had good redox reversibility, their carbon dioxide capture capacity was 7.80 mmol·g−1while the material utilization rate reaches reached 73.4%.Keywords:1,4-anthraquinone;multi-walled carbon nanotubes;magnetic stirring;poly(anthraquinone)/multi-walled carbon nanotube composites;carboxylation;carbon dioxide capture
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