Tunable electromagnetic interference shielding effectiveness via multilayer assembly of regenerated cellulose as a supporting substrate and carbon nanotubes/polymer as a functional layer

Abstract

Simultaneous improvement of electromagnetic interference shielding and mechanical properties of a multilayer-structured CNT/regenerated cellulose composite.

The design and fabrication of a multilayered graded GNP/Ni/PMMA nanocomposite for enhanced EMI shielding behavior

“…Since the thickness of each layer is larger than the skin depth, which is the distance up to which the intensity of a wave decreases to 1/e of its original strength, 9 waves reected between layers dissipate into heat energy. 25 This factor can be added to the SE A of the mutilayered structure. For these reasons, the multilayered structure can improve the shielding capability of a material without increasing the total amount of GNP/Ni.…”

Fabrication of gradient vapor grown carbon fiber based polyurethane foam for shape memory driven microwave shielding

“…Rapid development of advanced intelligence security and smart electronic equipment has led to demand for functional EM shielding devices, which can respond to external stimulus (i.e., electricity, heat, and light) or/and have tunable shielding effect, such as controllable EM shielding switch for cutoff and reception of EM signals. [17][18][19][20][21][22][23][24] For example, Wang and co-workers have reported a kind of hydro-sensitive sandwich structure by embedding porous polypropylene non-woven spacers into highly conductive pyrolytic graphite papers. In the presence and absence of polar water molecules, porous spacers achieved a switchable structural transformation through polar induced interfaces.…”

Layer-Structured Design and Fabrication of Cyanate Ester Nanocomposites for Excellent Electromagnetic Shielding with Absorption-Dominated Characteristic

“…It is well known that regulating the structure of PCs has a remarkable influence on the electrical conductivity, which is directly related to EMI SE [24,25,26,27,28,29]. Recently, a large number of researchers have proven that PCs with layer-structured possessed superior EMI SE than conventional PCs at low filler content [20,26,30,31,32,33,34,35]. For example, composites prepared by stacking ten layers of 0.1 mm multiwalled carbon nanotubes/polymethyl methacrylate (MWCNT/PMMA) have a higher SE than that prepared from a single 1.0-mm-thick piece of bulk MWCNT/PMMA [30].…”