scispace - formally typeset
Search or ask a question
Topic

Polymer nanocomposite

About: Polymer nanocomposite is a research topic. Over the lifetime, 8977 publications have been published within this topic receiving 297599 citations.


Papers
More filters
01 Jan 2005
TL;DR: In this paper, two methods to improve the dispersion, interfacial adhesion and properties of polymer mixtures are presented, based on infrared spectroscopy and optical microscopy results.
Abstract: Two methods to improve the dispersion, interfacial adhesion and properties of polymer mixtures are presented. Infrared spectroscopy and optical microscopy results document that control of the spacing of interacting moieties along the polymer chain results in optimal intermolecular hydrogen bonding and improved miscibility between two polymers. Moreover, initial results indicate that this protocol also works for polymer nanocomposites. Computational and experimental results indicate that multiblock or blocky copolymers are the most effective interfacial strengtheners among linear copolymers for polymer–polymer interfaces. ADCB and neutron reflectivity experiments provide direct evidence that multiblock copolymers that have blocks that are long enough to entangle with a homopolymer are most effective at strengthening the interface. Both sets of results provide guidelines by which multi-component polymer systems can be designed with target properties.

78 citations

Journal ArticleDOI
TL;DR: In this paper, a blue-light-emitting conjugated polymer, poly(9,9-dioctylfluorene), is confined to the interlayer space of inorganic, layered metal dichalcogenide materials, metallic MoS2, and semiconducting SnS2.
Abstract: In this study a blue-light-emitting conjugated polymer, poly(9,9-dioctylfluorene), is confined to the interlayer space of inorganic, layered metal dichalcogenide materials, metallic MoS2, and semiconducting SnS2. The nanocomposites are prepared through Li intercalation into the inorganic compound, exfoliation, and restacking in the presence of the polymer. X-ray diffraction and optical absorption measurements indicate that a single conjugated polymer monolayer, with an overall extended planar morphology conformation, is isolated between the inorganic sheets, so that polymer aggregation or p–p interchain interactions are significantly reduced. Photoluminescence (PL) measurements show that the appearance of the undesirable green emission observed in pristine polymer films is suppressed by incorporating the polymer into the inorganic matrix. The blue emission of the intercalated polymer is stable for extended periods of time, over two years, under ambient conditions. Furthermore, the green emission is absent in the PL spectra of nanocomposite films heated at 100°C for 7 h in air with direct excitation of the keto defect. Finally, no green emission was observed in the electroluminescence spectrum of light-emitting devices fabricated with a polymer-intercalated SnS2 nanocomposite film. These results support the proposed hypothesis that fluorenone defects alone are insufficient to generate the green emission and that interchain interactions are also required.

78 citations

Journal ArticleDOI
TL;DR: In this paper, the preparation of polymer nanocomposite (PNC) films, consisting of poly(vinylidene fluoride) and bismuth vanadium oxide nanoparticles (BiVO4-NPs), and its electroactive phase (β- and γ-phase) formation was reported.
Abstract: In this work we report on the preparation of polymer nanocomposite (PNC) films, consisting of poly(vinylidene fluoride) and bismuth vanadium oxide nanoparticles (BiVO4-NPs), and its electroactive phase (β- and γ-phase) formation. It was found that BiVO4-NPs can yield up to 98% of the electroactive phases in PVDF. Fourier transform infrared spectroscopy (FTIR) results reveal that electrostatic interactions are present at the interface between surface charges of BiVO4-NPs and –CH2/CF2– molecular dipoles of PVDF favoring and stabilizing the electroactive phases. The electrostatic interaction is further confirmed by X-ray photoelectron spectroscopy (XPS) analysis. Compared to the neat PVDF film, a significantly increased dielectric constant (e ∼ 44) and a low loss factor (tan δ ∼ 0.02) were observed in the PNC films. In addition, PNC films exhibit a high electrical energy density up to 11 J cm−3 with a breakdown electric field higher than 400 MV m−1. Furthermore, a dramatic improvement of the toughness (460%) was also noticed for the PNC films. These results underline the high potential of such films for their use as flexible high energy density capacitors and flexible piezoelectric based power sources as well.

78 citations

Journal ArticleDOI
TL;DR: In this paper, the authors employed copper nanowire as a conductive filler in highly flexible EMA/EOC (50/50 wt%) binary blend to fabricate highly conductive, lightweight and flexible conductive polymer composite via solution mixing technique.
Abstract: Polymer nanocomposite containing metal nanowires are of an advanced class of conductive material. Here, we employed copper nanowire as a conductive filler in highly flexible EMA/EOC (50/50 wt%) binary blend to fabricate highly conductive, lightweight and flexible conductive polymer composite via solution mixing technique. The newly developed composite gave double percolation conductive network by selective localization of the nanowire in one of the binary phase. High conductivity in the range 102 S/cm was attained beyond percolation which was more than that achieved with most of the carbonaceous filler. This composite finds potential application as EMI shielding material for modern electronic devices and was demonstrated in this study. Absorption driven shielding efficiency of −45 dB was attained with 15 wt % copper nanowire loading.

78 citations

Journal ArticleDOI
TL;DR: In this paper, a method for achieving controlled dispersion of graphene oxide (GO) in poly(methyl methacrylate) (PMMA) via the precipitation polymerization process in a water/methanol mixture is presented.
Abstract: We report a method for achieving controlled dispersion of graphene oxide (GO) in poly(methyl methacrylate) (PMMA) via the precipitation polymerization process in a water/methanol mixture. GO acts as a surfactant and adsorbs on the interface between polymerized PMMA particles and solvent mixture. Scanning electron and transmission electron microscopy confirmed that the precipitate consists of polymer particles (<1 μm) surrounded by the GO sheets. Compression molding of the precipitate yields a polymer nanocomposite with the GO organized into a regularly spaced 3D network which percolates at 0.2 wt % GO. Simple thermal reduction of the GO sheets dispersed in PMMA at relatively low temperature (210 °C) achieved electrical conductivity higher than 10–2 S/m at 0.4 wt % of GO. Parallel dielectric and rheological characterization demonstrated that the thermal reduction is a quite fast process without significant degradation of the polymer. The study should open up new opportunities in the design of GO-based poly...

78 citations


Network Information
Related Topics (5)
Carbon nanotube
109K papers, 3.6M citations
92% related
Polymerization
147.9K papers, 2.7M citations
89% related
Graphene
144.5K papers, 4.9M citations
89% related
Oxide
213.4K papers, 3.6M citations
86% related
Thin film
275.5K papers, 4.5M citations
85% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023165
2022391
2021661
2020726
2019630
2018674