期刊
CARBON
卷 149, 期 -, 页码 679-692出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2019.04.058
关键词
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资金
- National Key Research and Development Program of China [2017YFB0308602]
- Science AMP
- Technology Coordinating Innovative Engineering Project in Shaanxi Province [2015KTCL01-11]
- Inter-governmental Science AMP
- Technology Cooperation Project [43-18]
- Science AMP
- Technology Project of Weiyang District of Xi'an City [201830]
- Scientific Research Initiation Foundation of Shaanxi University of Science Technology [2016BJ-28]
pi-pi stacking interface design strategy is proposed to prepare ultrathin and flexible water-borne polymer/sulfonated graphene nanosheets (S-GNS) composite by a facile self-assembly method in latex. The water-dispersible S-GNS was made by modifying the GNS with aryl diazonium salt. Styrene was introduced into water-borne polymer to form pi-pi stacking interaction with S-GNS. The composite shows good mechanical properties and high electromagnetic interference (EMI) shielding effectiveness (SE) in the X band (8.2-12.4 GHz). By Raman spectra, tensile tests, and simulation calculation, pi-pi stacking interaction is proved to be an effective interface bonding to enhance the mechanical properties. With a filler loading of 20 wt%, the tensile strength of composites is enhanced by 578%. The incorporation of 25 wt% S-GNS leads to a high EMI SE of 21.5 dB at 0.05 mm thickness, which remains unchanged after 1000 times bending. The specific SE/thickness (SSE/t) of the composite is as high as 2663 dB cm(2)/g, outperforming the ever reported materials with similar filler loading (25 wt%). The composite can be used as coating on the surfaces of solids, indicating the great potential for wide application. (C) 2019 Elsevier Ltd. All rights reserved.
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