DSpace
 

Depot Institutionnel de l'UMBB >
Publications Scientifiques >
Publications Internationales >

Veuillez utiliser cette adresse pour citer ce document : http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/11271

Titre: Absorption performances of PLA-Montmorillonite nanocomposites thin films in salisbury and rozanov configurations : influence of aging and mechanical recycling
Auteur(s): Sidi Salah, Lakhdar
Ouslimani, Nassira
Danlée, Yann
Huynen, Isabelle
Mots-clés: Artificial aging
EMI shielding
Mechanical recycling
Microwave absorption
Organo-modified montmorillonite
PLA composites
Rozanov
Salisbury
Date de publication: 2023
Editeur: MDPI
Collection/Numéro: Micromachines/ Vol.13, N°12 (2023);pp. 1-15
Résumé: The present paper aims to address the crucial concern of pollution induced by growing plastic waste and electromagnetic interference (EMI). Nanocomposites combining poly(lactic acid) (PLA) and organo-modified montmorillonite (OMMT) are synthesized and compression molded into thin films. A first set of samples, referred as virgin, was kept as is, while a second set of samples were photochemically, thermally and hydrolytically aged before mechanical recycling via extruding and second compression molding, resulting in the so-called recycled composite. The electromagnetic (EM) properties with a focus on microwave absorption performances of virgin and recycled samples are compared for various thicknesses and weight concentrations of OMMT in PLA matrix. The EM performances are gauges by Rozanov and Salisbury structures that consist in one- and two-layer stacks of composite films back-coated by a metal foil. Characterization in Rozanov configuration shows an average absorption index over the Ka band of 29.3% and 21.1% for, respectively, virgin and recycled PLA reinforced with 4 wt.% OMMT. An optimization of the film thickness is proposed; up to 61.85% and 80% of absorption with a thickness of 1.4 mm and 3.75 mm, respectively, is reached with a metal back-coated rPLA-4%OMMT film. Characterization in Salisbury configuration gives advantage to the recycled structure with an average absorption of 49.6% for a total thickness of 1.4 mm. The requirements of EMI shielding are met by PLA-OMMT composites with a certain benefit of recycling process on EM performance
URI/URL: https://www.mdpi.com/2072-666X/13/12/2152
https://doi.org/10.3390/mi13122152
http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/11271
ISSN: 2072666X
Collection(s) :Publications Internationales

Fichier(s) constituant ce document :

Fichier Description TailleFormat
Lakhdar Sidi Salah.pdf1,68 MBAdobe PDFVoir/Ouvrir
View Statistics

Tous les documents dans DSpace sont protégés par copyright, avec tous droits réservés.

 

Valid XHTML 1.0! Ce site utilise l'application DSpace, Version 1.4.1 - Commentaires