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137 results on '"Zhan, Yanhu"'

6. Synergistic enhancement in permittivity and energy storage capacity of epoxy dielectrics via constructing continuous 3D BaTiO3 network collaborated with graphene oxide

Author

Bi, Xueqing, primary, Xue, Wenqing, additional, Yang, Yongzhi, additional, Wang, Zhen, additional, Wang, Zi, additional, Li, Yuchao, additional, Zhan, Yanhu, additional, Li, Wei, additional, Han, Weifang, additional, Ge, Bo, additional, Ren, Junwen, additional, and Zha, Jun-Wei, additional

Published
2023
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7. Anisotropic layer-by-layer carbon nanotubes/boron nitride/rubber composite and its application in electromagnetic shielding

Author

Zhan, Yanhu, Lago, Emanuele, Santillo, Chiara, Castillo, Antonio Esau Del Rio, Hao, Shuai, Buonocore, Giovanna G., Chen, Zhenming, Xia, Hesheng, Lavorgna, Marino, and Bonaccorso, Francesco

Subjects
Condensed Matter - Materials Science
Abstract

Multifunctional polymer composites with anisotropic properties are attracting interests as they fulfil the growing demand of multitasking materials. In this work, anisotropic polymer composites are fabricated by combining the layer-by-layer (LBL) filtration method with the alternative assembling of carbon nanotubes (CNTs) and hexagonal boron nitride flakes (hBN) on natural rubber latex particles (NR). The layered composites exhibit anisotropic thermal and electrical conductivities, which are tailored through the layer formulations. The best composite consists of four layers of NR modified with 8 phr (parts per Hundred Rubber) CNTs (~7.4 wt%) and four alternated layers with 12 phr hBN (~10.7 wt%). The composites exhibit an electromagnetic interference (EMI) shielding effectiveness of 22.41+-0.14 dB mm-1 at 10.3 GHz and a thermal conductivity equal to 0.25 W/(mK). Furthermore, when the layered composite is used as an electrical thermal heater the surface reaches a stable temperature of ~103 C in approx. 2 min, with an input bias of 2.5 V., Comment: 13 pages, 5 figures

Published
2020
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15. Graphene-Based Hybrid Fillers for Rubber Composites.

Author

Wang, Jian, Li, Shijiu, Yang, Li, Liu, Baohua, Xie, Songzhi, Qi, Rui, Zhan, Yanhu, and Xia, Hesheng

Subjects
RUBBER, ELECTROMAGNETIC shielding, REINFORCEMENT of rubber, CARBON-black, CARBON nanotubes, SHOCK absorbers, METALLIC oxides
Abstract

Graphene and its derivatives have been confirmed to be among the best fillers for rubber due to their excellent properties, such as high mechanical strength, improved interface interaction, and strain-induced crystallization capabilities. Graphene rubber materials can be widely used in tires, shoes, high-barrier conductive seals, electromagnetic shielding seals, shock absorbers, etc. In order to reduce the graphene loading and endow more desirable functions to rubber materials, graphene-based hybrid fillers are extensively employed, which can effectively enhance the performance of rubber composites. This review briefly summarizes the recent research on rubber composites with graphene-based hybrid fillers consisting of carbon black, silica, carbon nanotubes, metal oxide, and one-dimensional nanowires. The preparation methods, performance improvements, and applications of different graphene-based hybrid fillers/rubber composites have been investigated. This study also focuses on methods that can ensure the effectiveness of graphene hybrid fillers in reinforcing rubber composites. Furthermore, the enhanced mechanism of graphene- and graphene derivative-based hybrid fillers in rubber composites is investigated to provide a foundation for future studies. [ABSTRACT FROM AUTHOR]

Published
2024
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25. Robust CoFe2O4@Carbon Nanotube/Polydimethylsiloxane Foams with Low Thermal Conductivity for Electromagnetic Interference Shielding.

Author

Xie, Zhaoxin, Wei, Zijian, Meng, Yanyan, Pan, Na, Zhang, Ran, Zhan, Yanhu, and Xia, Hesheng

Abstract

Multifunctional polymer-based electromagnetic interference (EMI) shielding foams are attracting considerable attention owing to their ability to mitigate increasing electromagnetic-wave pollution. However, developing robust foams with excellent EMI shielding capabilities and superior thermal insulation properties remains challenging. Herein, CoFe2O4@carbon nanotube/polydimethylsiloxane/expandable polymer microsphere (CFO@CPE) foams were successfully prepared using a combination procedure involving solution mixing, freeze-drying, and hot-press molding. The synergistic effect of the porous structure and segregated magnetic/conductive network enabled the CFO@CPE foam to exhibit a shielding effectiveness of 48.85 dB and a low thermal conductivity of 0.106 W/(m·K). In addition, the impact and compressive strengths of the obtained foams reached 3.78 kJ/m2 and 8.17 MPa, respectively. These features support the application of the resultant foam as an EMI shielding material in complex practical situations. [ABSTRACT FROM AUTHOR]

Published
2023
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