The Experts below are selected from a list of 342 Experts worldwide ranked by ideXlab platform

Mohammed Naffakh - One of the best experts on this subject based on the ideXlab platform.

  • opportunities and challenges in the use of Inorganic fullerene like Nanoparticles to produce advanced polymer nanocomposites
    Progress in Polymer Science, 2013
    Co-Authors: Carlos Marco, G. Ellis, Ana M Diezpascual, Mohammed Naffakh, Marian A Gomezfatou
    Abstract:

    Polymer/Inorganic Nanoparticle nanocomposites have garnered considerable academic and industrial interest over recent decades in the development of advanced materials for a wide range of applications. In this respect, the dispersion of so-called Inorganic fullerene-like (IF) Nanoparticles, e.g., tungsten disulfide (IF-WS2) or molybdenum disulfide (IF-MoS2), into polymeric matrices is emerging as a new strategy. The surprising properties of these layered metal dichalcogenides such as high impact resistance and superior tribological behavior, attributed to their nanoscale size and hollow quasi-spherical shape, open up a wide variety of opportunities for applications of these Inorganic compounds. The present work presents a detailed overview on research in the area of IF-based polymer nanocomposites, with special emphasis on the use of IF-WS2 Nanoparticles as environmentally friendly reinforcing fillers. The incorporation of IF particles has been shown to be efficient for improving thermal, mechanical and tribological properties of various thermoplastic polymers, such as polypropylene, nylon-6, poly(phenylene sulfide), poly(ether ether ketone), where nanocomposites were fabricated by simple melt-processing routes without the need for modifiers or surfactants. This new family of nanocomposites exhibits similar or enhanced performance when compared with nanocomposites that incorporate carbon nanotubes, carbon nanofibers or nanoclays, but are substantially more cost-effective, efficient and environmentally satisfactory. Most recently, innovative approaches have been described that exploit synergistic effects to produce new materials with enhanced properties, including the combined use of micro- and Nanoparticles such as IF-WS2/nucleating agent or IF-WS2/carbon fiber, as well as dual Nanoparticle systems such as SWCNT/IF-WS2 where each Nanoparticle has different characteristics. The structure–property relationships of these nanocomposites are discussed and potential applications proposed ranging from medicine to the aerospace, automotive and electronics industries.

  • Inorganic Nanoparticle modified poly phenylene sulphide carbon fiber laminates thermomechanical behaviour
    Materials, 2013
    Co-Authors: Ana M Diezpascual, Mohammed Naffakh
    Abstract:

    Carbon fiber (CF)-reinforced high-temperature thermoplastics such as poly(phenylene sulphide) (PPS) are widely used in structural composites for aerospace and automotive applications. The porosity of CF-reinforced polymers is a very important topic for practical applications since there is a direct correlation between void content and mechanical properties. In this study, Inorganic fullerene-like tungsten disulphide (IF-WS2) lubricant Nanoparticles were used to manufacture PPS/IF-WS2/CF laminates via melt-blending and hot-press processing, and the effect of IF-WS2 loading on the quality, thermal and mechanical behaviour of the hybrid composites was investigated. The addition of IF-WS2 improved fiber impregnation, resulting in lower degree of porosity and increased delamination resistance, compression and flexural properties; their reinforcement effect was greater at temperatures above the glass transition (Tg). IF-WS2 contents higher than 0.5 wt % increased Tg and the heat deflection temperature while reduced the coefficient of thermal expansion. The multiscale laminates exhibited higher ignition point and notably reduced peak heat release rate compared to PPS/CF. The coexistence of micro- and nano-scale fillers resulted in synergistic effects that enhanced the stiffness, strength, thermal conductivity and flame retardancy of the matrix. The results presented herein demonstrate that the IF-WS2 are very promising nanofillers to improve the thermomechanical properties of conventional thermoplastic/CF composites.

Lei Zhu - One of the best experts on this subject based on the ideXlab platform.

  • robust transparent and superhydrophobic coating fabricated with waterborne polyurethane and Inorganic Nanoparticle composites
    Industrial & Engineering Chemistry Research, 2019
    Co-Authors: Hao Zheng, Mingwang Pan, Jie Wen, Jinfeng Yuan, Lei Zhu
    Abstract:

    We report the fabrication of a robust, transparent, and superhydrophobic organic–Inorganic composite coating with simple, low-cost, effective, and environmentally friendly characteristics. First, a waterborne polyurethane (WPU) emulsion and silica fluoride (F-SiO2) Nanoparticle dispersion were synthesized. Subsequently, the organic–Inorganic superhydrophobic surfaces with low surface energy were constructed by spraying, in order, the WPU emulsion and F-SiO2 Nanoparticle dispersion on substrates. The robust composite coating had superhydrophobicity and good optical transparency, in which the WPU provided a strongly adhesive elastic substance for the anchoring of superhydrophobic F-SiO2 Nanoparticles to further construct a mechanically and chemically resilient nanocomposite coating. After 250 cycles of abrasion, a long period of ultraviolet irradiation, and oil-pollution and cross-cut tests, the nanocomposite coating still exhibited excellent properties including good self-cleaning, transparency, abrasion r...

  • Robust, Transparent, and Superhydrophobic Coating Fabricated with Waterborne Polyurethane and Inorganic Nanoparticle Composites
    2019
    Co-Authors: Hao Zheng, Mingwang Pan, Jie Wen, Jinfeng Yuan, Lei Zhu
    Abstract:

    We report the fabrication of a robust, transparent, and superhydrophobic organic–Inorganic composite coating with simple, low-cost, effective, and environmentally friendly characteristics. First, a waterborne polyurethane (WPU) emulsion and silica fluoride (F-SiO2) Nanoparticle dispersion were synthesized. Subsequently, the organic–Inorganic superhydrophobic surfaces with low surface energy were constructed by spraying, in order, the WPU emulsion and F-SiO2 Nanoparticle dispersion on substrates. The robust composite coating had superhydrophobicity and good optical transparency, in which the WPU provided a strongly adhesive elastic substance for the anchoring of superhydrophobic F-SiO2 Nanoparticles to further construct a mechanically and chemically resilient nanocomposite coating. After 250 cycles of abrasion, a long period of ultraviolet irradiation, and oil-pollution and cross-cut tests, the nanocomposite coating still exhibited excellent properties including good self-cleaning, transparency, abrasion resistance, aging resistance, and strong adhesion. Even after being oil-contaminated, the WPU/F-SiO2 composite coatings still possessed superhydrophobic properties, showing their future application as self-cleaning surfaces and protective coatings for various substrates

Ana M Diezpascual - One of the best experts on this subject based on the ideXlab platform.

  • opportunities and challenges in the use of Inorganic fullerene like Nanoparticles to produce advanced polymer nanocomposites
    Progress in Polymer Science, 2013
    Co-Authors: Carlos Marco, G. Ellis, Ana M Diezpascual, Mohammed Naffakh, Marian A Gomezfatou
    Abstract:

    Polymer/Inorganic Nanoparticle nanocomposites have garnered considerable academic and industrial interest over recent decades in the development of advanced materials for a wide range of applications. In this respect, the dispersion of so-called Inorganic fullerene-like (IF) Nanoparticles, e.g., tungsten disulfide (IF-WS2) or molybdenum disulfide (IF-MoS2), into polymeric matrices is emerging as a new strategy. The surprising properties of these layered metal dichalcogenides such as high impact resistance and superior tribological behavior, attributed to their nanoscale size and hollow quasi-spherical shape, open up a wide variety of opportunities for applications of these Inorganic compounds. The present work presents a detailed overview on research in the area of IF-based polymer nanocomposites, with special emphasis on the use of IF-WS2 Nanoparticles as environmentally friendly reinforcing fillers. The incorporation of IF particles has been shown to be efficient for improving thermal, mechanical and tribological properties of various thermoplastic polymers, such as polypropylene, nylon-6, poly(phenylene sulfide), poly(ether ether ketone), where nanocomposites were fabricated by simple melt-processing routes without the need for modifiers or surfactants. This new family of nanocomposites exhibits similar or enhanced performance when compared with nanocomposites that incorporate carbon nanotubes, carbon nanofibers or nanoclays, but are substantially more cost-effective, efficient and environmentally satisfactory. Most recently, innovative approaches have been described that exploit synergistic effects to produce new materials with enhanced properties, including the combined use of micro- and Nanoparticles such as IF-WS2/nucleating agent or IF-WS2/carbon fiber, as well as dual Nanoparticle systems such as SWCNT/IF-WS2 where each Nanoparticle has different characteristics. The structure–property relationships of these nanocomposites are discussed and potential applications proposed ranging from medicine to the aerospace, automotive and electronics industries.

  • Inorganic Nanoparticle modified poly phenylene sulphide carbon fiber laminates thermomechanical behaviour
    Materials, 2013
    Co-Authors: Ana M Diezpascual, Mohammed Naffakh
    Abstract:

    Carbon fiber (CF)-reinforced high-temperature thermoplastics such as poly(phenylene sulphide) (PPS) are widely used in structural composites for aerospace and automotive applications. The porosity of CF-reinforced polymers is a very important topic for practical applications since there is a direct correlation between void content and mechanical properties. In this study, Inorganic fullerene-like tungsten disulphide (IF-WS2) lubricant Nanoparticles were used to manufacture PPS/IF-WS2/CF laminates via melt-blending and hot-press processing, and the effect of IF-WS2 loading on the quality, thermal and mechanical behaviour of the hybrid composites was investigated. The addition of IF-WS2 improved fiber impregnation, resulting in lower degree of porosity and increased delamination resistance, compression and flexural properties; their reinforcement effect was greater at temperatures above the glass transition (Tg). IF-WS2 contents higher than 0.5 wt % increased Tg and the heat deflection temperature while reduced the coefficient of thermal expansion. The multiscale laminates exhibited higher ignition point and notably reduced peak heat release rate compared to PPS/CF. The coexistence of micro- and nano-scale fillers resulted in synergistic effects that enhanced the stiffness, strength, thermal conductivity and flame retardancy of the matrix. The results presented herein demonstrate that the IF-WS2 are very promising nanofillers to improve the thermomechanical properties of conventional thermoplastic/CF composites.

Zhiyong Tang - One of the best experts on this subject based on the ideXlab platform.

  • design and application of Inorganic Nanoparticle superstructures current status and future challenges
    Small, 2011
    Co-Authors: Yan Gao, Zhiyong Tang
    Abstract:

    Self-assembly of Inorganic Nanoparticles (NPs) into superstructures, which is used as a general way to integrate functional Inorganic NPs into macroscale devices, has attracted much research interest. This review will summarize the recent progress and discuss future challenges of the Inorganic NP superstructures. Examples include both DNA-based and polymer-based NP assemblies with controlled positioning and geometries, and quasicrystalline ordered structures from the self-assembly of binary or ternary NPs. Different from their individual NP counterparts, these self-assembled superstructures possess unique properties, such as optical chirality and dynamic structural change under an external stimulus. Due to their diversified structures and functionalities, Inorganic NP superstructures have shown a wide range of promise for applications in electronic and photonic devices, such as field-effect transistors, magnetoresistive components, optical information recording, and solar cells.

  • reversible photoswitchable fluorescence in thin films of Inorganic Nanoparticle and polyoxometalate assemblies
    Journal of the American Chemical Society, 2010
    Co-Authors: Bing Qin, Hongyue Chen, Hui Liang, Xinfeng Liu, Xiaohui Qiu, Shaoqin Liu, Rui Song, Zhiyong Tang
    Abstract:

    A novel type of Inorganic hybridized ultrathin film consisting of Preyssler-type polyoxometalates K14[Na(H2O)P5W30O110] (Na-POMs) and CdSe@CdS Nanoparticles (NPs) was prepared on the solid substrates by a layer-by-layer assembly technique. The film exhibits reversible fluorescence switching behavior under control of irradiation with either UV light or visible light, which is ascribed to the selective occurrence of fluorescence resonance energy transfer between luminescent NPs and different states of photochromic Na-POMs.

Hao Zheng - One of the best experts on this subject based on the ideXlab platform.

  • robust transparent and superhydrophobic coating fabricated with waterborne polyurethane and Inorganic Nanoparticle composites
    Industrial & Engineering Chemistry Research, 2019
    Co-Authors: Hao Zheng, Mingwang Pan, Jie Wen, Jinfeng Yuan, Lei Zhu
    Abstract:

    We report the fabrication of a robust, transparent, and superhydrophobic organic–Inorganic composite coating with simple, low-cost, effective, and environmentally friendly characteristics. First, a waterborne polyurethane (WPU) emulsion and silica fluoride (F-SiO2) Nanoparticle dispersion were synthesized. Subsequently, the organic–Inorganic superhydrophobic surfaces with low surface energy were constructed by spraying, in order, the WPU emulsion and F-SiO2 Nanoparticle dispersion on substrates. The robust composite coating had superhydrophobicity and good optical transparency, in which the WPU provided a strongly adhesive elastic substance for the anchoring of superhydrophobic F-SiO2 Nanoparticles to further construct a mechanically and chemically resilient nanocomposite coating. After 250 cycles of abrasion, a long period of ultraviolet irradiation, and oil-pollution and cross-cut tests, the nanocomposite coating still exhibited excellent properties including good self-cleaning, transparency, abrasion r...

  • Robust, Transparent, and Superhydrophobic Coating Fabricated with Waterborne Polyurethane and Inorganic Nanoparticle Composites
    2019
    Co-Authors: Hao Zheng, Mingwang Pan, Jie Wen, Jinfeng Yuan, Lei Zhu
    Abstract:

    We report the fabrication of a robust, transparent, and superhydrophobic organic–Inorganic composite coating with simple, low-cost, effective, and environmentally friendly characteristics. First, a waterborne polyurethane (WPU) emulsion and silica fluoride (F-SiO2) Nanoparticle dispersion were synthesized. Subsequently, the organic–Inorganic superhydrophobic surfaces with low surface energy were constructed by spraying, in order, the WPU emulsion and F-SiO2 Nanoparticle dispersion on substrates. The robust composite coating had superhydrophobicity and good optical transparency, in which the WPU provided a strongly adhesive elastic substance for the anchoring of superhydrophobic F-SiO2 Nanoparticles to further construct a mechanically and chemically resilient nanocomposite coating. After 250 cycles of abrasion, a long period of ultraviolet irradiation, and oil-pollution and cross-cut tests, the nanocomposite coating still exhibited excellent properties including good self-cleaning, transparency, abrasion resistance, aging resistance, and strong adhesion. Even after being oil-contaminated, the WPU/F-SiO2 composite coatings still possessed superhydrophobic properties, showing their future application as self-cleaning surfaces and protective coatings for various substrates