Cellulose aerogels decorated with multi-walled carbon nanotubes: preparation, characterization, and application for electromagnetic interference shielding

Abstract

Electromagnetic wave pollution has attracted extensive attention because of its ability to affect the operation of electronic machinery and endanger human health. In this work, the environmentally-friendly hybrid aerogels consisting of cellulose and multi-walled carbon nanotubes (MWCNTs) were fabricated. The aerogels have a low bulk density of 58.17 mg$cm . The incorporation of MWCNTs leads to an improvement in the thermal stability. In addition, the aerogels show a high electromagnetic interference (EMI) SE total value of 19.4 dB. Meanwhile, the absorption-dominant shielding mechanism helps a lot to reduce secondary radiation, which is beneficial to develop novel eco-friendly EMI shielding materials.

Multifaceted applications of cellulosic porous materials in environment, energy, and health

“…We draw attention to another study, which reported on a series of cellulose-derived carbon aerogels that were obtained by Li et al Their materials featured multi-walled carbon nanotubes (MWC-NTs) [124], graphene oxide (GO) [125], and goethite (␣-FeOOH) nanoneedles and nanoflowers [126], all of which showed good electrical conductivity and absorption-dominant EMI shielding effects. Among them, GO decorated cellulose aerogels had the best total EMI shielding ability SE total having the value of 58.4 dB at 8.2-12.4 GHz.…”

Synthesis of MnFe$lt;inf$gt;2$lt;/inf$gt;O$lt;inf$gt;4$lt;/inf$gt;/cellulose aerogel nanocomposite with strong magnetic responsiveness

“…The preparation process of cellulose hydrogel (the precursor of cellulose aerogel) was described in previous reports [15,16] . The prepared cellulose hydrogel was immersed in a freshly prepared aqueous solution of FeSO 4 $7H 2 O and MnCl 2 $4H 2 O (40 mL) with the stoichiometric ratio of Mn:Fe of 1:2.…”

The Usage of Conducting Wire Sphere Models for the Estimation of Electrophysical Properties of Multiwalled Carbon Nanotube Spherical Aerogels

“…The development of methods for the production of nanosized carbon materials extends the possibilities for controlling the properties of such coatings by varying the nature and type of the carbon filler distribution in the composite matrices . Of great interest are aerogels based on carbon nanotubes, which, due to their low weight and effective interaction with electromagnetic radiation, are promising for use as protective screens . We have developed the original one‐step method for production of muliwalled carbon nanotube (MWCNT) aerogels via a catalytic chemical vapor deposition (CCVD) with a specially formed catalyst (Fe–Co/CaO) at 650–700 °C in C 2 H 4 /Ar feedstock .…”

“…[2][3][4][5] Of great interest are aerogels based on carbon nanotubes, which, due to their low weight and effective interaction with electromagnetic radiation, are promising for use as protective screens. [6,7] We have developed the original one-step method for production of muliwalled carbon nanotube (MWCNT) aerogels via a catalytic chemical vapor deposition (CCVD) with a specially formed catalyst (Fe-Co/CaO) at 650-700 C in C 2 H 4 /Ar feedstock. [8,9] According to electron microscopy data and adsorption measurements, the MWCNTaerogels obtained show the structure of a rigid sponge of tangled nanotubes (bulk density 40-80 mg cm À3 and SBET 70-100 m 2 g À1 ).…”