Synthesis and physical properties of new surfactants based on ionic liquids: Improvement of thermal stability and mechanical behaviour of high density polyethylene nanocomposites

TEM micrographs of (a) PE/MMT-P I −, (b) PE/MMT-P Br −, (c) PE/MMT-P PF 6 - . [Display omitted] ► Synthesis of new surfactants for the olefinic matrices. ► Preparation of thermostable ionic liquid (IL) modified montmorillonites. ► Improvement of thermal and mechanical properties of nanocomposites. I...

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Bibliographic Details
Published in:Journal of colloid and interface science 2011-02, Vol.354 (2), p.555-562
Main Authors: Livi, Sébastien, Duchet-Rumeau, Jannick, Pham, Thi Nhàn, Gérard, Jean-François
Format: Article
Language:English
Subjects:
Cationic exchange
cationic surfactants
cations
Chemical Sciences
Chemistry
clay
Exact sciences and technology
General and physical chemistry
High density
Ionic liquids
Material chemistry
melting
mixing
Montmorillonite
Nanocomposites
Nanostructure
Organoclay
Polyethylene
Polyethylenes
Polymers
silicates
Surfactants
Thermal properties
Thermal stability
thermogravimetry
thermoplastics
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Summary:TEM micrographs of (a) PE/MMT-P I −, (b) PE/MMT-P Br −, (c) PE/MMT-P PF 6 - . [Display omitted] ► Synthesis of new surfactants for the olefinic matrices. ► Preparation of thermostable ionic liquid (IL) modified montmorillonites. ► Improvement of thermal and mechanical properties of nanocomposites. Ionic liquids based on alkyltriphenyl phosphonium and dialkyl imidazolium cations with long alkyl chains have been synthesized and used as new surfactants for cationic exchange of layered silicates. The influence of the alkyl chain length and the chemical nature of the conteranion or of the cation on the thermal stability of these new intercalating agents and on imidazolium- (MMT-I) or phosphonium- (MMT-P) modified montmorillonites have been analyzed by thermogravimetric analysis (TGA). Thermoplastic nanocomposites based on these modified montmorillonites with a very low amount of nanofillers (1 wt.%) have been processed by melt mixing using a twin screw extruder. The distribution of the clay layers in a high density polyethylene (HDPE) matrix was characterized and finally the mechanical and thermal properties of the corresponding nanocomposites were determined.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2010.10.058