Journal ArticleDOI
Polymer-layered silicate nanocomposites: preparation, properties and uses of a new class of materials
TLDR
In this article, a review of polymer-layered silicate nanocomposites is presented, where the polymer chains are sandwiched in between silicate layers and exfoliated layers are more or less uniformly dispersed in the polymer matrix.Abstract:
This review aims at reporting on very recent developments in syntheses, properties and (future) applications of polymer-layered silicate nanocomposites. This new type of materials, based on smectite clays usually rendered hydrophobic through ionic exchange of the sodium interlayer cation with an onium cation, may be prepared via various synthetic routes comprising exfoliation adsorption, in situ intercalative polymerization and melt intercalation. The whole range of polymer matrices is covered, i.e. thermoplastics, thermosets and elastomers. Two types of structure may be obtained, namely intercalated nanocomposites where the polymer chains are sandwiched in between silicate layers and exfoliated nanocomposites where the separated, individual silicate layers are more or less uniformly dispersed in the polymer matrix. This new family of materials exhibits enhanced properties at very low filler level, usually inferior to 5 wt.%, such as increased Young’s modulus and storage modulus, increase in thermal stability and gas barrier properties and good flame retardancy.read more
Citations
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Journal ArticleDOI
Polymer nanocomposites from modified clays: Recent advances and challenges
Moumita Kotal,Anil K. Bhowmick +1 more
TL;DR: In this article, progress in developments on the use of modified natural and synthetic clays for designing polymer nanocomposites is presented, and a synopsis of the applications of these advanced, high-performance polymer nan composites are presented, pointing out gaps to motivate potential research in this field.
Journal ArticleDOI
Thermal degradation studies of alkyl-imidazolium salts and their application in nanocomposites
Walid H. Awad,Jeffrey W. Gilman,Marc R. Nyden,Richard H. Harris,Thomas E. Sutto,John H. Callahan,Paul C. Trulove,Hugh C. DeLong,Douglas M. Fox +8 more
TL;DR: In this paper, a series of alkyl-imidazolium-treated montmorillonite clays were prepared and characterized by elemental analysis, thermogravimetry (TGA) and thermal desorption mass spectroscopy (TDMS).
Journal ArticleDOI
Intercalation and exfoliation routes to graphite nanoplatelets
TL;DR: Graphite nanoplatelets with thicknesses down to 2-10 nm are synthesized by alkali metal intercalation followed by ethanol exfoliation and microwave drying as mentioned in this paper, which can be achieved either by heating graphite and potassium or caesium at 200 °C, or at room temperature using a sodium-potassium alloy.
Journal ArticleDOI
Nanocomposites: Structure, Phase Behavior, and Properties
TL;DR: This review focuses on recent advances concerning underpinning points and how they affect measurable properties relevant to engineering applications and the role that particle shape plays in affecting dispersion and hence property control.
Journal ArticleDOI
Preparation and characterization of graphite nanosheets from ultrasonic powdering technique
TL;DR: In this paper, natural flake graphite was exfoliated into ex-foliated graphite via an acid intercalation procedure, and the resulting ex-graphite was a worm-like particle composed of graphite sheets with thickness in the nanometer scale.
References
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Journal ArticleDOI
Mechanical properties of nylon 6-clay hybrid
Yoshitsugu Kojima,Arimitsu Usuki,Masaya Kawasumi,Akane Okada,Yoshiaki Fukushima,Toshio Kurauchi,Osami Kamigaito +6 more
TL;DR: In this paper, the properties of nylon 6-clay hybrids, such as molecular composites of nylon and silicate layers of montmorillonite and saponite, NCH's and NCHP's, respectively, have been synthesized.
Journal ArticleDOI
Synthesis of nylon 6-clay hybrid
Arimitsu Usuki,Yoshitsugu Kojima,Masaya Kawasumi,Akane Okada,Yoshiaki Fukushima,Toshio Kurauchi,Osami Kamigaito +6 more
TL;DR: In this paper, the carboxyl and amino end groups were attributed to ammonium cations (-NH3+) of nylon molecules, because the difference agreed with the anion site concentration of the montmorillonite in NCH.
Journal ArticleDOI
Flammability and thermal stability studies of polymer layered-silicate (clay) nanocomposites
TL;DR: In this article, an overview of the research to date on the use of clays, dispersed at the nanometer level, in polymers for improving thermal stability and flammability is presented.
Journal ArticleDOI
Synthesis and properties of polyimide–clay hybrid
TL;DR: A polyimide hybrid with montmorillonite clay mineral has been synthesized from a dimethylacetamide (DMAC) solution of poly(amic acid) and a DMAC dispersion of montmoroniite intercalated with an ammonium salt of dodecylamine as mentioned in this paper.
Journal ArticleDOI
Preparation and Mechanical Properties of Polypropylene−Clay Hybrids
TL;DR: In this paper, the dispersibility of 10-A-thick silicate layers of the clays in the hybrid was investigated by using a transmission electron microscope and X-ray diffractometer.
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