Ultralight and Flexible Polyurethane/Silver Nanowire Nanocomposites with   Unidirectional Pores for Highly Effective Electromagnetic Shielding

doi:10.1021/acsami.7b07643

CORC > 北京大学 > 工学院

	Ultralight and Flexible Polyurethane/Silver Nanowire Nanocomposites with Unidirectional Pores for Highly Effective Electromagnetic Shielding
	Zeng, Zhihui ; Chen, Mingji ; Pei, Yongmao ; Shahabadi, Seyed Ismail Seyed ; Che, Boyang ; Wang, Peiyu ; Lu, Xuehong
刊名	ACS APPLIED MATERIALS & INTERFACES
	2017
关键词	electromagnetic interference shielding nanocomposites silver nanowires porous lightweight WALLED CARBON NANOTUBES FIBER-COMPOSITE FOAMS FACILE PREPARATION SILVER NANOWIRES EPOXY COMPOSITES STRESS TRANSFER GRAPHENE FOAM PERFORMANCE LIGHTWEIGHT EFFICIENCY
DOI	10.1021/acsami.7b07643
英文摘要	Flexible waterborne polyurethane (WPU)/ silver nanowire (AgNW) nanocomposites with unidirectionally aligned micrometer-sized pores are fabricated using a facile freeze-drying process, and their dimensions, densities, and AgNW contents are easily controllable. The high-aspect-ratio AgNWs are well-dispersed in the nanocomposite cell walls, giving the nanocomposites good compression strength and excellent electrical conductivity even at very low densities. The large conductivity mismatch between the AgNWs and WPU also induces substantial interfacial polarization that benefits the absorption of electromagnetic (EM) waves, whereas the aligned cell walls promote multireflections of the waves in the porous architectures, further facilitating the absorption. The synergistic actions of the AgNWs, WPU, and unidirectionally aligned pores lead to ultrahigh EM shielding performance. The X-band shielding effectiveness (SE) of the nanocomposites is 64 and 20 dB at the densities of merely 45 and 8 mg/cm(3), respectively, and ultrahigh surface specific SE of similar to 1087 dB cm(3)/(g mm) is achieved with only 0.027 vol % AgNWs, demonstrating that they are promising ultralight, flexible, mechanically robust, highperformance EM shielding materials.; Nanyang Technological University, Singapore; SCI(E); ARTICLE; 37; 32211-32219; 9
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/470787]
专题	工学院
推荐引用方式 GB/T 7714	Zeng, Zhihui,Chen, Mingji,Pei, Yongmao,et al. Ultralight and Flexible Polyurethane/Silver Nanowire Nanocomposites with Unidirectional Pores for Highly Effective Electromagnetic Shielding[J]. ACS APPLIED MATERIALS & INTERFACES,2017.
APA	Zeng, Zhihui.,Chen, Mingji.,Pei, Yongmao.,Shahabadi, Seyed Ismail Seyed.,Che, Boyang.,...&Lu, Xuehong.(2017).Ultralight and Flexible Polyurethane/Silver Nanowire Nanocomposites with Unidirectional Pores for Highly Effective Electromagnetic Shielding.ACS APPLIED MATERIALS & INTERFACES.
MLA	Zeng, Zhihui,et al."Ultralight and Flexible Polyurethane/Silver Nanowire Nanocomposites with Unidirectional Pores for Highly Effective Electromagnetic Shielding".ACS APPLIED MATERIALS & INTERFACES (2017).