Topic
Polymer nanocomposite
About: Polymer nanocomposite is a research topic. Over the lifetime, 8977 publications have been published within this topic receiving 297599 citations.
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TL;DR: In this article, the authors investigated polymer nanocomposites containing a series of Al@Al2O3 nanofillers with different shell thicknesses and showed that the high dielectric constant of percolative composites is contributed by a fast intra-particle polarization and a slow interparticle polarization.
113 citations
TL;DR: In this article, the morphology issues of polymer nanocomposites based on inorganic layer structures are addressed and the potential impact of using the synthetic α-zirconium phosphate as a reinforcement p is discussed.
Abstract: This review aims to address the morphology issues of polymer nanocomposites based on inorganic layer structures Depending upon the degree of dispersion of nano-sized layer structure, polymer composites can be divided into three main categories: microcomposites, intercalated nanocomposites, and exfoliated nanocomposites The exfoliated nanocomposites can be subdivided into ordered and disordered exfoliations An intermediate morphology between intercalation and exfoliation, known as partial exfoliation, is also commonly seen The above differences in morphology lead to significant variations in physical and mechanical properties of polymer nanocomposites This review uses epoxy/clay nanocomposites to illustrate the development and recent achievements in the syntheses and exfoliation of polymer nanocomposites Herein, a recent study on an epoxy nanocomposite based on synthetic α-zirconium phosphate is reviewed The potential impact of using the synthetic α -zirconium phosphate as a reinforcement p
112 citations
TL;DR: Even at low loadings, nanocellulose offers an unprecedented level of control as a property modifier for a range of emulsion and polymer applications, influencing, for example, emulsion type, stability, and stimuli-responsive behavior.
Abstract: Nanocelluloses (i.e., bacterial nanocellulose, cellulose nanocrystals, and cellulose nanofibrils) are cellulose-based materials with at least one dimension in the nanoscale. These materials have unique and useful properties and have been shown to assemble at oil-water interfaces and impart new functionality to emulsion and latex systems. Herein, the use of nanocellulose in both emulsions and heterogeneous water-based polymers is reviewed, including dispersion, suspension, and emulsion polymerization. Comprehensive tables describe past work employing nanocellulose as stabilizers or additives and the properties that can be tailored through the use of nanocellulose are highlighted. Even at low loadings, nanocellulose offers an unprecedented level of control as a property modifier for a range of emulsion and polymer applications, influencing, for example, emulsion type, stability, and stimuli-responsive behavior. Nanocellulose can tune polymer particle properties such as size, surface charge, and morphology, or be used to produce capsules and polymer nanocomposites with enhanced mechanical, thermal, and adhesive properties. The role of nanocellulose is discussed, and a perspective for future direction is presented.
112 citations
TL;DR: This work shows how the critical concentration is related to the formation of capacitor networks and that these networks give rise to high variations in the electrical properties of the composites.
Abstract: The low concentration behaviour and the increase of the dielectric constant in carbon nanotubes/polymer nanocomposites near the percolation threshold are still not well understood. In this work, a numerical model has been developed which focuses on the effect of the inclusion of conductive fillers in a dielectric polymer matrix on the dielectric constant and the dielectric strength. Experiments have been carried out in carbon nanotubes/poly(vinylidene fluoride) nanocomposites in order to compare to the simulation results. This work shows how the critical concentration is related to the formation of capacitor networks and that these networks give rise to high variations in the electrical properties of the composites. Based on numerical studies, the dependence of the percolation transition on the preparation of the nanocomposite is discussed. Finally, based on numerical and experimental results, both ours and from other authors, the causes of anomalous percolation behaviour of the dielectric constant are identified.
112 citations
TL;DR: In this paper, aramid nanofibers that are intrinsically dispersible in many polymers are prepared from commercial Aramid fibers and isolated through a simple, scalable, and low-cost controlled dissolution method.
Abstract: The development of nanoscale reinforcements that can be used to improve the mechanical properties of a polymer remains a challenge due to the long-standing difficulties with exfoliation and dispersion of existing materials. The dissimilar chemical nature of common nanofillers (e.g., carbon nanotubes, graphene) and polymeric matrix materials is the main reason for imperfect filler dispersion and, consequently, low mechanical performance of their composites relative to theoretical predictions. Here, aramid nanofibers that are intrinsically dispersible in many polymers are prepared from commercial aramid fibers (Kevlar) and isolated through a simple, scalable, and low-cost controlled dissolution method. Integration of the aramid nanofibers in an epoxy resin results in nanocomposites with simultaneously improved elastic modulus, strength, and fracture toughness. The improvement of these two mutually exclusive properties of nanocomposites is comparable to the enhancement of widely reported carbon nanotube rein...
112 citations