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Synthesis and Characterization of PMMA/MWNT …

Synthesis of the dispersed phase merges processes for producing ferrofluids and mMWNTs.

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Synthesis of MWNT/PEDOT Composites for the Application …

AB - A novel porous sulfur/polypyrrole/multiwalled carbon nanotube composite (S/PPy/MWNT) was synthesized via in situ polymerization of pyrrole monomer with nano-sulfur and MWNT aqueous suspension followed by a low temperature heat-treatment. Scanning electronic microscopy revealed the formation of a highly hierarchical mesoporous and macroporous structure. High resolution transmission electronic microscopy confirmed homogeneous dispersion of S, PPy and MWNT in the composite. In this composite, polypyrrole with its high adhesion ability to MWNT acts as a conductive binder to connect sulfur and MWNT matrix, as well as absorbs polysulfides into its porous structure positively affecting the composite performance as a cathode in a Li/S cell. The resulting S/PPy/MWNT composite cathode exhibited greatly enhanced cyclability and delivered a reversible discharge capacity of 751 mAh g-1 after 100 cycles at 0.2 C.

Facile synthesis of MoS2/MWNT anode material for …

A melt processing method has been used to prepare HDPE/N-MWNT nanocomposites with different filler loading percentages between 0.1, 0.4, 0.8, and 1.0 wt.%. The CNTs were dispersed into the host HDPE matrix by shearing action only of a pair of cylinder screws and then hot-pressed. HRTEM observations indicate that the N-MWNT product exhibits a bamboo shape with 97% purity and a high selectivity. The presence of N-MWNT in polymer matrix HDPE is clearly observed even at low loadings of N-MWNTs. The fraction of the crystalline phase was determined from the normalized integrated intensity of the 1,418 cm-1 Raman band, which represents the orthorhombic crystalline phase in polyethylene. The XRD analysis demonstrated that the crystalline structure of HDPE matrix was not affected by the incorporation of the N-MWNTs.

Synthesis of MWNT-based composite materials with …

T1 - Facile Synthesis of SiO2@C Nanoparticles Anchored on MWNT as High-Performance Anode Materials for Li-ion Batteries

N2 - A novel porous sulfur/polypyrrole/multiwalled carbon nanotube composite (S/PPy/MWNT) was synthesized via in situ polymerization of pyrrole monomer with nano-sulfur and MWNT aqueous suspension followed by a low temperature heat-treatment. Scanning electronic microscopy revealed the formation of a highly hierarchical mesoporous and macroporous structure. High resolution transmission electronic microscopy confirmed homogeneous dispersion of S, PPy and MWNT in the composite. In this composite, polypyrrole with its high adhesion ability to MWNT acts as a conductive binder to connect sulfur and MWNT matrix, as well as absorbs polysulfides into its porous structure positively affecting the composite performance as a cathode in a Li/S cell. The resulting S/PPy/MWNT composite cathode exhibited greatly enhanced cyclability and delivered a reversible discharge capacity of 751 mAh g-1 after 100 cycles at 0.2 C.

A novel porous sulfur/polypyrrole/multiwalled carbon nanotube composite (S/PPy/MWNT) was synthesized via in situ polymerization of pyrrole monomer with nano-sulfur and MWNT aqueous suspension followed by a low temperature heat-treatment. Scanning electronic microscopy revealed the formation of a highly hierarchical mesoporous and macroporous structure. High resolution transmission electronic microscopy confirmed homogeneous dispersion of S, PPy and MWNT in the composite. In this composite, polypyrrole with its high adhesion ability to MWNT acts as a conductive binder to connect sulfur and MWNT matrix, as well as absorbs polysulfides into its porous structure positively affecting the composite performance as a cathode in a Li/S cell. The resulting S/PPy/MWNT composite cathode exhibited greatly enhanced cyclability and delivered a reversible discharge capacity of 751 mAh g-1 after 100 cycles at 0.2 C.

Synthesis, structure, and properties of TLCP/MWNT composites ..

Facile synthesis of MoS2/MWNT anode material for high-performance lithium-ion batteries

AB - New polyaniline/nanotube (PANI/NT) composites have been synthesized by "in situ" polymerization processes using both multi-wall carbon nanotubes (MWNTs) and single-wall carbon nanotubes (SWNTs) in concentrations ranging from 2 to 50 wt.%. Although no structural changes are observed using MWNTs above a concentration of 20 wt.%, the in situ synthesis results in electronic interactions between nanotubes and the quinoid ring of PANI leading to enhanced electronic properties and thus to the formation of a genuine PANI/MWNT composite material. On the other hand, using SWNTs favors the formation of inhomogeneous mixtures rather than of a homogeneous composite materials, independent of the SWNT concentration. X-ray diffraction, Raman and transport measurements show the different behavior of both classes of nanotubes in PANI/NT materials. The difficulties in the formation of a true PANI/SWNT composite are related to the far more complex structure of the SWNT material itself, i.e. to the presence of entangled

Poly(methyl methacrylate)/multiwalled carbon-nanotube (PMMA/MWNT) nanocomposites were prepared via polymerization induced by nickel(II) acetylacetonate/methylaluminoxane ([Ni(acac)2]/MAO) catalyst. The incorporation of the MWNT into the PMMA increased the glass transition temperature and thermal decomposition temperature. The solution-casted films of the nanocomposites dissolved in methylene chloride exhibited very high transparency. The introduction of MWNT decreased the syndiotacticity of the resultant PMMA. The storage modulus of the composite increased significantly with increased MWNT content in the PMMA matrix, which was much higher than that of PMMA/clay nanocomposites at the same wt % of filler contents. The PMMA-rich layer which usually formed on the coating surface due to the surface tension and wetting characteristics of the MWNT/PMMA matrix provided excessive interactions between the large surface area nanotubes and the PMMA matrix.

Radiolytic Synthesis of Pt-M@MWNT Catalysts (M=Ru, …
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  • Request (PDF) | Synthesis of MWNT-Ba..

    Original Articles Synthesis of MWNT/PEDOT Composites for the Application of Organic Light Emitting Diodes

  • Synthesis and characterization of HDPE/N-MWNT …

    reported the synthesis of PANI-MWNT nanocomposite by in situ chemical polymerization …

  • Defense: Synthesis and Metrology of Conducting …

    Synthesis of the dispersed phase merges processes for producing ferrofluids and mMWNTs

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Wong Group - Stony Brook University

Synthesis of branched-MWNT materials and few layer graphene (FLG) materials – these materials will be the nanoscale reinforcing component (NSCRs). This will provide large amounts of starting material for producing composites. Design of composites with polymers, ceramics and other matrix materials and the nano-scale reinforcing components (NSRCs).

High Quality Fullerene Products [ MTR Ltd. ]

In this work, a series of nitrogen-doped multi-walled carbon nanotubes (N-MWCNTs) with several weight percentages (0.1, 0.4, 0.8, and 1.0 wt.%) were synthesized by catalytic chemical vapor deposition (CCVD) technique. The N-MWCNTs were first characterized and then dispersed in high-density polyethylene (HDPE) polymer matrix to form a nanocomposite. The HDPE/N-MWCNT nanocomposite films were prepared by melt mixing and hot pressing; a good dispersion in the matrix and a good N-MWCNT-polymer interfacial adhesion have been verified by scanning electron microscopy (SEM). Raman spectroscopy measurements have been performed on prepared samples to confirm the presence and nature of N-MWNTs in HDPE matrix. The X-ray diffraction (XRD) analysis demonstrated that the crystalline structure of HDPE matrix was not affected by the incorporation of the N-MWNTs.

PUBLICATIONS | Jong-Beom Baek | UNIST

The main materials used in this study are N-MWNTs (>97% purity) with an outer mean diameter around 40 nm and a length over 10 μm. These nanotubes were synthesized by catalytic chemical vapor deposition (CCVD) technique using a mixture of C2H6/Ar/NH3 and 20 wt.% iron catalyst supported by alumina powder. The polymer matrix used is HDPE with trade name TR144, supplied by Sonatrach Company CP2K (Skikda, Algeria). The melt index of HDPE pellets is 0.30 with a density of 0.942 to 0.947 g/cm3.

CNT Technology Overview - Nanoscience Instruments

Multiwalled carbon nanotubes (MWNTs) (diameter range, 10−20 nm) were functionalized with 4-methoxybenzoic acid and 4-ethoxybenzoic acid via a Friedel−Crafts reaction in polyphosphoric acid to afford methoxybenzoyl- and ethoxybenzoyl-functionalized MWNTs. As-received MWNT, methoxybenzoyl-functionalized (MeO-MWNT), and ethoxybenzoyl-functionalized (EtO-MWNT) nanotubes were dispersed in ethylene glycol (EG). Because of the structural similarity, the mixture of EtO-MWNT (0.4 wt %) and EG was a homogeneous dispersion, whereas MeO-MWNT and pristine MWNT were dispersed in EG rather heterogeneously at the same loading. polycondensation of EG and terephthalic acid in the presence of pristine MWNT, MeO-MWNT, or EtO-MWNT was carried out to generate the corresponding MWNT/PET, MeO-MWNT/PET, and EtO-MWNT/PET nanocomposites. High molecular weight poly(ethylene terephthalates) (PETs), with intrinsic viscosity range 0.6−0.7 dL/g (-chlorophenol at 30 ± 0.1 °C), were obtained in all cases. In comparing the images from scanning electron microscopy (SEM) taken at the same magnification for these nanocomposites, it is clear that the MWNT/PET system has poor MWNT dispersion and the MeO-MWNT/PET system has a better dispersion. However, EtO-MWNT in PET matrix is most homogeneously dispersed, and the interfacial boundary between EtO-MWNT and PET matrix is practically nondiscernible.

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