Journal ArticleDOI
Polypyrrole-interface-functionalized nano-magnetite epoxy nanocomposites as electromagnetic wave absorbers with enhanced flame retardancy
Jiang Guo,Jiang Guo,Haixiang Song,Hu Liu,Chunjia Luo,Yanrong Ren,Tao Ding,Mojammel A. Khan,David P. Young,Xinyu Liu,Xin Zhang,Jie Kong,Zhanhu Guo +12 more
TLDR
In this article, a polypyrrole functionalized nano-magnetite (Fe3O4-PPy) was used to enhance the electromagnetic wave absorption performance and flame retardancy.Abstract:
Epoxy nanocomposites reinforced with polypyrrole functionalized nano-magnetite (Fe3O4–PPy) showed significantly enhanced electromagnetic wave absorption performance and flame retardancy. The Fe3O4–PPy nanocomposites were prepared by the surface initiated polymerization method. The epoxy/(30.0 wt%)Fe3O4–PPy nanocomposites possess a minimum reflection loss (RL) value of −35.7 dB, which is much lower than that of either epoxy/(7.5 wt%)PPy nanocomposites with a minimum RL value of −11.0 dB or epoxy/(30.0 wt%)Fe3O4 with a minimum RL value of −17.8 dB at the same thickness (1.7 mm). Meanwhile, the bandwidth of epoxy/(30.0 wt%)Fe3O4–PPy nanocomposites for RL < −10 dB and RL < −20 dB is 4.0 GHz and 0.8 GHz, respectively. The increased interface area, eddy current loss and anisotropic energy are essentially important to achieve higher reflection loss and broader absorption bandwidth for epoxy/(30.0 wt%)Fe3O4–PPy nanocomposites. Moreover, the significantly reduced flammability was observed in the epoxy/(30.0 wt%)Fe3O4–PPy nanocomposites compared with pure epoxy. The total heat release of epoxy/(30.0 wt%)Fe3O4–PPy nanocomposites decreased from 25.5 kJ g−1 of pure epoxy to just 12.3 kJ g−1. The tensile strength of the epoxy nanocomposites was reported as well. These new nanocomposites with an enhanced electromagnetic wave absorption property and flame retardancy possess great potential for safer electromagnetic wave absorbers in the electronic industry to satisfy stringent industrial standards.read more
Citations
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Journal ArticleDOI
Electromagnetic Response and Energy Conversion for Functions and Devices in Low‐Dimensional Materials
Mao-Sheng Cao,Xi-Xi Wang,Min Zhang,Jin-Cheng Shu,Wen-Qiang Cao,Hui-Jing Yang,Xiao-Yong Fang,Jie Yuan +7 more
Journal ArticleDOI
Electrically conductive polymer composites for smart flexible strain sensors: a critical review
Hu Liu,Hu Liu,Qianming Li,Shuaidi Zhang,Rui Yin,Xianhu Liu,Yuxin He,Kun Dai,Chongxin Shan,Jiang Guo,Chuntai Liu,Changyu Shen,Xiaojing Wang,Xiaojing Wang,Ning Wang,Zicheng Wang,Zicheng Wang,Renbo Wei,Zhanhu Guo +18 more
TL;DR: In this paper, a review of resistive-type electrically conductive polymer composites (ECPCs)-based strain sensors is presented, where the conductive filler type and phase morphology design have important influences on the sensing property.
Journal ArticleDOI
Achieving superior electromagnetic wave absorbers through the novel metal-organic frameworks derived magnetic porous carbon nanorods
Nannan Wu,Nannan Wu,Dongmei Xu,Wang Zhou,Fenglong Wang,Jiurong Liu,Wei Liu,Qian Shao,Hu Liu,Qiang Gao,Zhanhu Guo +10 more
TL;DR: In this article, a rod-shape composites with Fe-containing magnetic nanoparticles (Fe3O4, Fe3C and Fe NPs) embedded into nano-porous carbon (NPC) through pyrolysis of Fe-based metal-organic frameworks (MOFs).
Journal ArticleDOI
Ultralight, highly compressible and fire-retardant graphene aerogel with self-adjustable electromagnetic wave absorption
Zicheng Wang,Zicheng Wang,Renbo Wei,Junwei Gu,Hu Liu,Hu Liu,Chuntai Liu,Chunjia Luo,Jie Kong,Qian Shao,Ning Wang,Zhanhu Guo,Xiaobo Liu +12 more
TL;DR: In this paper, a 3D free-standing porous all-graphene aerogel with ultralight density and high compressibility is successfully fabricated through a mild in-situ self-assembly and thermal annealing processes.
Journal ArticleDOI
Ultralow percolation threshold and enhanced electromagnetic interference shielding in poly(L-lactide)/multi-walled carbon nanotube nanocomposites with electrically conductive segregated networks
Kai Zhang,Gen-Hui Li,La-Mei Feng,Ning Wang,Jiang Guo,Kai Sun,Kai-Xin Yu,Jian-Bing Zeng,Tingxi Li,Zhanhu Guo,Ming Wang +10 more
TL;DR: In this article, electrical conductivity and the electromagnetic interference (EMI) shielding effectiveness of poly(L-lactide)/multi-walled carbon nanotube (PLLA/MWCNT) nanocomposites without sacrificing their mechanical properties via simply choosing two different PLLA polymers with different viscosities and crystallinities.
References
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Journal ArticleDOI
Flammability and thermal stability studies of polymer layered-silicate (clay) nanocomposites
TL;DR: In this article, an overview of the research to date on the use of clays, dispersed at the nanometer level, in polymers for improving thermal stability and flammability is presented.
Journal ArticleDOI
Electromagnetic interference shielding of graphene/epoxy composites
Jiajie Liang,Yan Wang,Yi Huang,Yanfeng Ma,Zunfeng Liu,Jinming Cai,Chendong Zhang,Hong-Jun Gao,Yongsheng Chen +8 more
TL;DR: In this paper, composites based on graphene-based sheets have been fabricated by incorporating solution-processable functionalized graphene into an epoxy matrix, and their electromagnetic interference (EMI) shielding studies were studied.
Journal ArticleDOI
Structured Reduced Graphene Oxide/Polymer Composites for Ultra-Efficient Electromagnetic Interference Shielding
Ding-Xiang Yan,Huan Pang,Bo Li,Robert Vajtai,Ling Xu,Peng-Gang Ren,Jian-Hua Wang,Zhong-Ming Li +7 more
TL;DR: In this paper, a high-performance electromagnetic interference shielding composite based on reduced graphene oxide (rGO) and polystyrene (PS) is realized via high-pressure solid-phase compression molding.
Journal ArticleDOI
Shell thickness-dependent microwave absorption of core-shell Fe3O4@C composites.
TL;DR: By considering good chemical homogeneity and microwave absorption, it is believed the as-fabricated Fe3O4@C composites can be promising candidates as highly effective microwave absorbers.
Journal ArticleDOI
Heat release rate: The single most important variable in fire hazard☆
TL;DR: In this paper, the authors explain why heat release rate is, in fact, the single most important variable in characterizing the "flammability" of products and their consequent fire hazard.