期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Macroscopic Electromagnetic Cooperative Network‑Enhanced MXene/Ni Chains Aerogel‑Based Microwave Absorber with Ultra‑Low Matching Thickness 被引量:6
1
作者 Fei Pan Yanping Rao +7 位作者 Dan Batalu Lei Cai Yanyan Dong Xiaojie Zhu Yuyang Shi Zhong Shi Yaowen Liu Wei Lu 《Nano-Micro Letters》 SCIE EI CAS CSCD 2022年第8期283-299,共17页
Electromagnetic cooperative strategy has been presented as a mainstream approach that can effectively optimize the matching thickness of dielectric loss dominant system.However,it is still challenging for dielectric–... Electromagnetic cooperative strategy has been presented as a mainstream approach that can effectively optimize the matching thickness of dielectric loss dominant system.However,it is still challenging for dielectric–magnetic loss coexisting-type absorber to develop electromagnetic wave(EMW)performance with ultra-low matching thickness(≤1 mm).Breaking the limitation of traditional electromagnetic response at microscopic/mesoscopic scale,a ficus microcarpa-like magnetic aerogel with macroscopical electromagnetic cooperative effect was fabricated through highly oriented self-assembly engineering.The highly oriented Ni chains with unique macroscopic morphology(~1 cm in length)were achieved via a special magnetic field-induced growth.Strong magnetic coupling was observed in the Ni chains confirmed by the micromagnetic simulation.The deductive calculation validates that maintaining high value of electromagnetic parameters at high frequencies is the prerequisites of ultrathin absorber.The electromagnetic cooperative networks with uninterrupted and dual pathways spread through the entire aerogel skeleton,resulting in the impressive permittivity even at high frequencies.Consequently,the aerogel exhibits a remarkable EMW performance at an ultrathin thickness of 1 mm.Thus,based on the modulation of electromagnetic parameters,this work proposed a macroscopic ordered structure with the electromagnetic cooperative effect useful to develop a suitable strategy for achieving ultrathin EMW absorbers. 展开更多
关键词 Electromagnetic wave absorption Ti_(3)CNT_(x)MXene Highly oriented Ni chains Electromagnetic cooperation Magnetic coupling
下载PDF
A Unified Thermodynamic Model of Flow-induced Crystallization of Polymer 被引量:3
2
作者 Cui Nie Fan Peng +3 位作者 Ting-Yu Xu Jun-Fang Sheng Wei Chen Liang-Bin Li 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2021年第11期1489-1495,共7页
We propose a unified thermodynamic model of flow-induced crystallization of polymer(uFIC),which incorporates not only the conformational entropy reduction but also the contributions of flow-induced chain orientation,t... We propose a unified thermodynamic model of flow-induced crystallization of polymer(uFIC),which incorporates not only the conformational entropy reduction but also the contributions of flow-induced chain orientation,the interaction of ordered segments,and the free energy of crystal nucleus and crystal morphology.Specifically,it clarifies the determining parameters of the critical crystal nucleus size,and is able to account for the acceleration of nucleation,the emergence of precursor,different crystal morphologies and structures induced by flow.Based on the nucleation barrier under flow,we analyze at which condition precursor may occur and how flow affects the competition among different crystal forms such as orthorhombic and hexagonal phases of polyethylene.According to the uFIC model,the different crystal morphologies and structures in the flow-temperature space have been clarified,which give a good agreement with experiments of FIC. 展开更多
关键词 Flow-induced crystallization Unified thermodynamic model Flow-induced chain orientation
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部