Gradient foaming of polycarbonate/carbon nanotube based nanocomposites with supercritical carbon dioxide and their EMI shielding performances

Monnereau, Laure; Urbanczyk, Laetitia; Thomassin, Jean‐Michel; Pardoen, Thomas; Bailly, Christian; Huynen, Isabelle; Jérôme, Christine; Detrembleur, Christophe

doi:10.1016/j.polymer.2014.11.063

Cited by 86 publications

(32 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, the absorbed power was higher than 90 % for composites with only 2 wt.% MWCNT prepared by precipitation‐polymerization . In another work, MWCNT/PC composites were prepared by melt‐extrusion and compression and expanded by supercritical CO 2 ; they found that limiting the diffusion time of CO 2 inside the material, it was possible to obtain foams with a gradient morphology which were capable of absorbing up to 90 % of the incident radiation ,…”

Section: Foam‐based Materialsmentioning

confidence: 99%

Electromagnetic Shielding Materials in GHz Range

González

Pozuelo

Baselga

2018

The Chemical Record

112

View full text Add to dashboard Cite

The state-of-the art in the design and the manufacture methods of the different electromagnetic shielding materials has been reviewed. This topic has become a mainstream field of research because of the electromagnetic pollution generated by telecommunication technology development. The review is centred in absorbent materials and shows a general overview of how the absorption properties of such composites can be tailored through changes in geometry, composition, morphology, and the filler particles content. Although different types of materials are explained, the text is mainly focused on carbon materials such as graphene and carbon nanotubes. In this way, the importance of the dispersion of the conductive fillers in different polymer matrices is discussed. In addition, an extensive study on new complex architectures such as foam-based materials is presented. Finally, the combination of carbon fillers with other constituents such as metallic nanoparticles is mentioned. In all these studies, the efficiency of the composites as absorbent or reflective of electromagnetic radiation is discussed.

show abstract

Section: Foam‐based Materialsmentioning

confidence: 99%

Electromagnetic Shielding Materials in GHz Range

González

Pozuelo

Baselga

2018

The Chemical Record

112

View full text Add to dashboard Cite

show abstract

“…Monnereau et al studied the effect of foaming on the electrical properties of PC/MWCNT nanocomposites. In the first study, the maximum value of EC of about 2.25 × 10 −2 S/cm of unfoamed samples was observed at 2 wt% MWCNT loading, and for foamed sample, the highest EC of around 2.3 × 10 −2 S/cm was observed at only 0.5 wt% loading.…”

Section: Pc/cnt Nanocompositesmentioning

confidence: 99%

“…The nanocomposites showed EMI SE of −23.1 dB at 2 wt% with 70 wt% PC bead. Monnereau et al studied the foaming effect on PC/MWCNT nanocomposites using scCO 2 . The nanocomposites showed −15 dB EMI SE at 2 wt% loading of MWCNTs (20‐min CO 2 impregnation time).…”

Section: Pc/cnt Nanocompositesmentioning

confidence: 99%

A review on the mechanical, electrical and EMI shielding properties of carbon nanotubes and graphene reinforced polycarbonate nanocomposites

Bagotia

Choudhary

Sharma

2018

Polymers for Advanced Techs

104

View full text Add to dashboard Cite

Recently, it has been found that carbon nanotubes (CNTs) and graphene could prove to be the most promising carbonaceous fillers in polymers nanocomposites field because of their better structural and functional properties. Their uniform dispersion in polymer matrix leads to significant improvements in their several properties. This paper reviews the effect of nanofillers, ie, CNTs, derivatized CNTs, and graphene on the polycarbonate nanocomposite and its application in aerospace, automobile, sports, electronic sectors, and various industries. The comparative analysis of carbon‐based fillers on the different properties of polycarbonate nanocomposites is also included.

show abstract

“…Typically, a previously dispersed precursor is converted in the desired NPs by a simple thermal treatment [51,52] Then, taking advantage of this procedure we studied the possibility to obtain foams with a controlled and templated porous structure, presenting distinct nanoporous and microporous areas that follow a pre-existing NPs template obtained by a selective in situ synthesis of the NPs. Polymer foams with a controlled pore size gradient have been proposed as a way to reach improved acoustic insulation [62] or electromagnetic interference shielding [63], as well as to mimic high-performance biological structures (e.g. bones) [64].…”

Section: Introductionmentioning

confidence: 99%

Nanoporous PMMA foams with templated pore size obtained by localized in situ synthesis of nanoparticles and CO2 foaming

Pinto

Morselli

Bernardo

et al. 2017

Polymer

View full text Add to dashboard Cite

a b s t r a c tPolymer foams with controlled and templated pore size have been obtained for the first time by CO 2 gas dissolution foaming from poly(methyl methacrylate) (PMMA) films. This kind of materials, with a variable porous structure, mimic some high-performance natural materials and could present significant interest in many applications. However, up to now their controlled fabrication has not been successfully achieved. Herein, we present a method to achieve a fine control in the production of such materials. Thermal in situ synthesis of ZnO nanoparticles from Zn(OAc) 2 was proposed to obtain PMMA nanocomposites, in which the ZnO nanoparticles induce heterogeneous nucleation that leads to formation of pores with size below the micron, upon CO 2 foaming. Starting from templated solid PMMA samples with well-differentiated regions, presenting or not ZnO nanoparticles, it was possible to obtain PMMA-based foams with well-defined areas of different pore sizes.

show abstract

Gradient foaming of polycarbonate/carbon nanotube based nanocomposites with supercritical carbon dioxide and their EMI shielding performances

Cited by 86 publications

References 35 publications

Electromagnetic Shielding Materials in GHz Range

Electromagnetic Shielding Materials in GHz Range

A review on the mechanical, electrical and EMI shielding properties of carbon nanotubes and graphene reinforced polycarbonate nanocomposites

Nanoporous PMMA foams with templated pore size obtained by localized in situ synthesis of nanoparticles and CO2 foaming

Contact Info

Product

Resources

About