Effect of Carbon Nanotube Content on Electromagnetic Interference Shielding Performance of Carbon Nanotube-Cellulose Composite Materials

doi:10.11901/1005.3093.2015.005

Chinese Journal of Materials Research

2015, Vol. 29

Issue (8): 583-588 DOI: 10.11901/1005.3093.2015.005

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Effect of Carbon Nanotube Content on Electromagnetic Interference Shielding Performance of Carbon Nanotube-Cellulose Composite Materials

Zhipeng PANG¹,Xiaogang SUN^1,^2,^**(

),Xiaoyuan CHENG¹,Xiaoyong WU¹,Qi FU¹

1. School of Mechantronics Engineering, Nanchang University, Nanchang, 330031, China
2. Institute of lithium Energy, Nanchang 330031, China

Cite this article:

Zhipeng PANG,Xiaogang SUN,Xiaoyuan CHENG,Xiaoyong WU,Qi FU. Effect of Carbon Nanotube Content on Electromagnetic Interference Shielding Performance of Carbon Nanotube-Cellulose Composite Materials. Chinese Journal of Materials Research, 2015, 29(8): 583-588.

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Abstract

Composite sheets of carbon nanotubes-cellulose fibers were made by suction filtration method with cellulose fibers as matrix and graphitized CNTs as electroconductive agent. The products were characterized by scanning electron microscopy, shielding effectiveness, four-point probes, and while the effect of carbon nanotube content on the EMI shielding performance of the prepared composite sheets was investigated. The results show that the shape and conductivity is controllable for the composite sheets, which then exhibits good flexibility, electrical conductivity and EMI shielding effectiveness. CNTs were adsorbed on the cellulose fibers and formed a continuously interconnected conductive network. With the increasing amount of CNTs from 10% to 71%, the conductivity of the composite sheets increased from 9.92 S/m to 216.3S/m and correspondingly their EMI shielding effectiveness increased from 15dB to 45dB in the frequency range 175 MHz-1600 MHz.

Key words: composite materials CNTs EMI shielding flexible cellulose fibers conductive sheets

Received: 05 January 2015

Fund: *Supported by Jiangxi Education Bureau Program No. KJLD13006 and Program of Jiangxi Scientific and Technological Bureau Nos.2012ZBBE50012 &20142BBE50071.

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	Zhipeng PANG
	Xiaogang SUN
	Xiaoyuan CHENG
	Xiaoyong WU
	Qi FU

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https://www.cjmr.org/EN/10.11901/1005.3093.2015.005 OR https://www.cjmr.org/EN/Y2015/V29/I8/583

Table 1 Production programs of CNT paper

Fig.1 SEM of CNTs (a), HRTEM of CNTs before graphitization (b) and HRTEM of CNTs after graphitization (c)

Fig.2 XRD patterns of CNTs before and after graphitization

Fig.3 CNT paper under bending conditions (a) and CNT paper work as wires and light up the LED (b)

Fig.4 SEM of the section of CNTs-cellulose composite materials different magnifications: (a) 200x , (b) 2500x

Fig.5 SEM of the surface of CNT papers with different loading of CNTs (a) 10%, (b) 20%, (c) 33%, (d) 50%, (e) 60%, (f) 66%, (g) 71%

Table 2 Physical characterization of CNT paper with different loading of CNTs

Fig.6 EMI shielding effectiveness of samples with different loading of CNTs

Fig.7 Effect of CNTs content on conductivity and SE in the frequency of 1500MHz of CNT paper

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