Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 57, Issue 50, Pages 17152-17160Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.8b04573
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Funding
- National Natural Science Foundation of China [51703137]
- Fundamental Research Funds for the Central Universities [2012017yjsy186]
- Fundamental Research Funds for the Central Universities of China [2015SCU11008]
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For the preparation of lightweight and high-performance electromagnetic interference shielding material, the poor dispersion of carbon nanotubes (CNTs) and weak interfacial strength degrade the mechanical properties of the polymer-based composite with extremely high filler contents. Herein cellulose nanofibers (CNFs) prepared by TEMPO-mediated oxidation exhibits a dispersive action for multiwalled carbon nanotube (MWCNTs) without chemical functionalization of the MWCNTs or the use of surfactant. Thus a robust and flexible CNF/MWCNT composite film can be fabricated by simple vacuum filtration and hot-pressing method. This composite film (thickness 0.15 mm) shows an electromagnetic interference shielding effectiveness (EMI SE) of 45.8 dB in the X-band. Thanks to the all-fiber structure and the association between CNFs and MWCNTs, it exhibits good flexibility and tensile strength up to 48 MPa, which is superior to other reported MWCNT-based films for electromagnetic shielding, giving it the potential to be used in flexible electronics and wearable devices.
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