Maghnite: novel inorganic reinforcement for single-step synthesis of PDMS nanocomposites with improved thermal, mechanic
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Maghnite: novel inorganic reinforcement for single‑step synthesis of PDMS nanocomposites with improved thermal, mechanical and textural properties Djamal Eddine Kherroub1 · Tarik Boulaouche2 Received: 14 April 2020 / Accepted: 26 August 2020 © Springer Nature B.V. 2020
Abstract A simple and efficient strategy was discussed for the synthesis of polydimethylsiloxane nanocomposites, based on the in situ sonochemical polymerization of hexamethylcyclotrisiloxane between the nanosheets of Maghnite; Maghnite is a treated Algerian mineral clay that can act as a catalyst and as an inorganic reinforcement at the same time. Three types of Maghnite were prepared: raw, sodium and organophilic Maghnite. The nanocomposites synthesis was carried out on the type of Maghnite that showed the greatest interlayer spacing, by varying its content weight. The structure of obtained materials was identified by FTIR-ATR and 1H MAS NMR spectroscopies. Moreover, the dispersion state of Maghnite particles was examined by XRD, TEM and SEM. TGA has been used to study the thermal properties. The evaluation of the mechanical properties evolution was by measuring the Young’s modulus and yield strength. The nitrogen adsorption capacity was calculated at 77 K. Exfoliated composites (5% loading) have shown better enhancement results concerning morphological, thermal, mechanical properties and adsorption capacity. Keywords Nanocomposites · Polymerization · Maghnite · Clay · Polydimethylsiloxane
Introduction Nanotechnologies are recognized as a promising and emerging multidisciplinary research area in the field of smart materials. The materials nanocomposites are generating considerable interest concerning broadening the scope of application of * Djamal Eddine Kherroub [email protected] 1
Laboratory of Polymer Chemistry, Department of Chemistry, Faculty of Exact and Applied Sciences, University of Oran 1, Ahmed Ben Bella, BP 1524, 31000 El’Menouer, Oran, Algeria
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Energy Processes UER, Polytechnic Military School (EMP), Bordj El Bahri, 16111 Algiers, Algeria
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D. E. Kherroub, T. Boulaouche
polymers. The introduction of particles of nanometric size into a polymer matrix makes it possible to obtain materials with improved properties (mechanical, thermal, electrical and optical) or new (fire retardant or barrier effect) [1–10]. A wide variety of nanoparticles have been studied to improve polymers for their applications. Clays (lamellar silicates) are the nanofillers, which have received the strongest interest from the scientific community [11–15]. The clay minerals are all made up of a stack of sheets: tetrahedral and octahedral, interspersed with a space called interlayer spacing [16]. Recently, a number of polyamide nanocomposites based on silicates have been marketed (Toyota 1992), in addition to clay-reinforced polypropylene (General Motors 2002) [17, 18]. The activities on polymeric nanocomposites focus on the methods of synthesis and characterization to distinguish the different factors influencing the
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