文献类型：期刊文献

英文题名：Highly conductive and flexible polymer composites with improved mechanical and electromagnetic interference shielding performances

作者：Chen, Mengting[1];Zhang, Ling[1];Duan, Shasha[1];Jing, Shilong[1];Jiang, Hao[1];Luo, Meifang[1];Li, Chunzhong[1]

机构：[1]E China Univ Sci & Technol, Key Lab Ultrafine Mat, Minist Educ, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2014

卷号：6

期号：7

起止页码：3796

外文期刊名：NANOSCALE

收录：;EI(收录号：20141317504240);WOS:【SCI-EXPANDED(收录号:WOS:000333042500048)】；

基金：This work was supported by the National Natural Science Foundation of China (51173043, 21236003, 21322607), the Special Projects for Nanotechnology of Shanghai (11nm0500200), the Basic Research Program of Shanghai (13JC1408100), Program for New Century Excellent Talents in University (NCET-11-0641) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Conductive materials - Electromagnetic shielding - Reinforced plastics - Signal interference - Microchannels - Tensile strength - Electromagnetic wave interference - Yarn - Aerogels - Multiwalled carbon nanotubes (MWCN)

摘要：New flexible and conductive materials (FCMs) comprising a quartz fiber cloth (QFC) reinforced multi-walled carbon nanotubes (MWCNTs)-carbon aerogel (QMCA) and poly(dimethylsiloxane) (PDMS) have been successfully prepared. The QMCA-PDMS composite with a very low loading of MWCNTs (similar to 1.6 wt%) demonstrates enhanced performance in tensile strength (129.6 MPa), modulus (3.41 GPa) and electromagnetic interference (EMI) shielding efficiency (SE) (similar to 16 dB in X-band (8.2-12.4 GHz) region). Compared to the QC (where MWCNTs were simply deposited on the QFCs without forming aerogel networks) based PDMS composite, a similar to 120%, 330% and 178% increase of tensile strength, modulus, and EMI SE was obtained, respectively. Moreover, the EMI SE of the QMCA-PDMS composite can further reach 20 dB (a SE level needed for commercial applications) with only 2 wt% MWCNTs. Furthermore, the conductivity of the QMCA-PDMS laminate can reach 1.67 S cm(-1) even with very low MWCNTs (1.6 wt%), which still remains constant even after 5000 times bending and exhibits an increase of similar to 170% than that of MWCNT-carbon aerogel (MCA)-PDMS at 20% strain. Such intriguing performances are mainly attributed to their unique networks in QMCA-PDMS composites. In addition, these features can also protect electronics against harm from external forces and EMI, giving the brand-new FCMs huge potential in next-generation devices, like E-skin, robot joints and so on.