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Light-Weight Silver Plating Foam and Carbon Nanotube Hybridized Epoxy Composite Foams with Exceptional Conductivity and Electromagnetic Shielding Property
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2016-08-31 00:00:00 , DOI: 10.1021/acsami.6b08325 Yu Xu 1 , Ying Li 1 , Wei Hua 2 , Aiming Zhang 1 , Jianjun Bao 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2016-08-31 00:00:00 , DOI: 10.1021/acsami.6b08325 Yu Xu 1 , Ying Li 1 , Wei Hua 2 , Aiming Zhang 1 , Jianjun Bao 1
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Herein, light-weight and exceptionally conductive epoxy composite foams were innovatively fabricated for electromagnetic interference (EMI) shielding applications using multiwalled carbon nanotubes (MWCNTs) and 3D silver-coated melamine foam (SF) as conductive frameworks. A novel and nontraditional polymer microsphere was used to reduce the material density. The preformed, highly porous, and electrically conductive SF provided channels for fast electron transport. The MWCNTs were used to offset the decrease in conductive pathways due to the crystal defects of the silver layer and the insulating epoxy resin. Consequently, an exceptional conductivity of 253.4 S m–1, a remarkable EMI shielding effectiveness of above 68 dB at 0.05–18 GHz, and a thermal conductivity of 0.305 W mK–1 were achieved in these novel foams employing only 2 wt % of MWCNTs and 3.7 wt % of silver due to the synergistic effects that originated in the MWCNT and SF. These parameters are substantially higher than that achieved for the foam containing 2 wt % MWCNTs. Also, the SF exhibited little weakening in the foamability of the epoxy blends and the compression properties of resulting foams. All the results indicated that this effort provided a novel, simple, low-cost, and easily industrialized concept for fabricating light-weight, high-strength epoxy composite foams for high-performance EMI shielding applications.
中文翻译：
具有优异电导率和电磁屏蔽性能的轻型镀银泡沫和碳纳米管混合环氧复合泡沫
在此，采用多壁碳纳米管（MWCNT）和3D镀银三聚氰胺泡沫（SF）作为导电框架，针对电磁干扰（EMI）屏蔽应用创新地制造了轻质且导电性极佳的环氧复合泡沫。一种新颖的非传统聚合物微球被用来降低材料密度。预制的，高度多孔且导电的SF为快速电子传输提供了通道。MWCNT被用来抵消由于银层和绝缘环氧树脂的晶体缺陷导致的导电路径的减少。因此，其出色的电导率为253.4 S m –1，在0.05–18 GHz时具有显着的EMI屏蔽效果，高于68 dB，热导率为0.305 W mK –1由于源于MWCNT和SF的协同作用，在仅使用2wt％的MWCNT和3.7wt％的银的这些新型泡沫中获得了优异的效果。这些参数显着高于含有2wt％MWCNT的泡沫所达到的参数。另外，SF对环氧共混物的发泡性和所得泡沫的压缩性能几乎没有减弱。所有结果表明，该努力为制造用于高性能EMI屏蔽应用的轻质，高强度环氧复合泡沫塑料提供了一种新颖，简单，低成本且易于工业化的概念。
更新日期：2016-08-31
中文翻译：
具有优异电导率和电磁屏蔽性能的轻型镀银泡沫和碳纳米管混合环氧复合泡沫
在此，采用多壁碳纳米管（MWCNT）和3D镀银三聚氰胺泡沫（SF）作为导电框架，针对电磁干扰（EMI）屏蔽应用创新地制造了轻质且导电性极佳的环氧复合泡沫。一种新颖的非传统聚合物微球被用来降低材料密度。预制的，高度多孔且导电的SF为快速电子传输提供了通道。MWCNT被用来抵消由于银层和绝缘环氧树脂的晶体缺陷导致的导电路径的减少。因此，其出色的电导率为253.4 S m –1，在0.05–18 GHz时具有显着的EMI屏蔽效果，高于68 dB，热导率为0.305 W mK –1由于源于MWCNT和SF的协同作用，在仅使用2wt％的MWCNT和3.7wt％的银的这些新型泡沫中获得了优异的效果。这些参数显着高于含有2wt％MWCNT的泡沫所达到的参数。另外，SF对环氧共混物的发泡性和所得泡沫的压缩性能几乎没有减弱。所有结果表明，该努力为制造用于高性能EMI屏蔽应用的轻质，高强度环氧复合泡沫塑料提供了一种新颖，简单，低成本且易于工业化的概念。
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