The Experts below are selected from a list of 78 Experts worldwide ranked by ideXlab platform

Shanshan Guan - One of the best experts on this subject based on the ideXlab platform.

  • Development of carboxyl-functionalized Multi-Walled Nanotube/polydimethylsiloxane novel polymeric nanodielectric material
    Materials Letters, 2018
    Co-Authors: Shanshan Guan, Hai Li, Shichuan Song, Guangshuai Mo, Shugao Zhao
    Abstract:

    Abstract In this paper, we develop a new type of polydimethylsiloxane (PDMS)-based nanocomposite by incorporating carboxyl-functionalized Multi-Walled Nanotube (MWCNT) to the polymer matrix as fillers. The dispersion of MWCNT during the material processing plays a significant role in deciding the final properties of the nanocomposites. A rapid evaporation and stirring method was used to minimize re-aggregation of the fillers during MWCNT/PDMS composites fabrication processing by solution blending. Furthermore, dispersions of MWCNT in solvents were investigated to correlate the degree of dispersion state with Hansen solubility parameters. The result indicated that carboxyl group can impart negative charges and create the long-term electrostatic stability of MWCNT in the solvents. The resultant MWCNT/PDMS composites exhibited high permittivity, low dielectric loss, and low percolation threshold.

  • Novel three-component nanocomposites with high dielectric permittivity and low dielectric loss co-filled by carboxyl-functionalized Multi-Walled Nanotube and BaTiO3
    Composites Science and Technology, 2018
    Co-Authors: Shanshan Guan, Shugao Zhao, Hai Li, Laina Guo
    Abstract:

    In this work, a novel ternary polydimethylsiloxane (PDMS)-based nanocomposite co-filled by carboxyl-functionalized Multi-Walled Nanotube (cMWCNT) and BaTiO3(BT) nanoparticle were developed. The hybrids cMWCNT-BT was realized via the hydrogen bonding (H-bonding) interaction between –COOH groups of cMWCNT and the -OH groups of BT. Compared with the binary composite of BT/PDMS and cMWCNT/PDMS, the results showed that the kind of three-component nanocomposites had high dielectric permittivity and low dielectric loss. Different from cMWCNT, the hybrids cMWCNT-BT have good dispersion in PDMS matrix, forming many micro-capacitors and interfaces, and thus leading to remarkably high dielectric constant. Meanwhile, BT on the surfaces of cMWCNT reduce the direct contact of cMWCNT, resulting in reduced dielectric loss. More important, the BT and cMWCNT had a synergistic effect on dielectric permittivity of the cMWCNT-BT/PDMS composite. Therefore, the dielectric properties of the novel ternary composite can be improved by optimizing the synergistic effects between the charge storage behavior of the ferroelectric phase and the charge transport behavior of the conductive phase.

Laina Guo - One of the best experts on this subject based on the ideXlab platform.

  • Novel three-component nanocomposites with high dielectric permittivity and low dielectric loss co-filled by carboxyl-functionalized Multi-Walled Nanotube and BaTiO3
    Composites Science and Technology, 2018
    Co-Authors: Shanshan Guan, Shugao Zhao, Hai Li, Laina Guo
    Abstract:

    In this work, a novel ternary polydimethylsiloxane (PDMS)-based nanocomposite co-filled by carboxyl-functionalized Multi-Walled Nanotube (cMWCNT) and BaTiO3(BT) nanoparticle were developed. The hybrids cMWCNT-BT was realized via the hydrogen bonding (H-bonding) interaction between –COOH groups of cMWCNT and the -OH groups of BT. Compared with the binary composite of BT/PDMS and cMWCNT/PDMS, the results showed that the kind of three-component nanocomposites had high dielectric permittivity and low dielectric loss. Different from cMWCNT, the hybrids cMWCNT-BT have good dispersion in PDMS matrix, forming many micro-capacitors and interfaces, and thus leading to remarkably high dielectric constant. Meanwhile, BT on the surfaces of cMWCNT reduce the direct contact of cMWCNT, resulting in reduced dielectric loss. More important, the BT and cMWCNT had a synergistic effect on dielectric permittivity of the cMWCNT-BT/PDMS composite. Therefore, the dielectric properties of the novel ternary composite can be improved by optimizing the synergistic effects between the charge storage behavior of the ferroelectric phase and the charge transport behavior of the conductive phase.

Shugao Zhao - One of the best experts on this subject based on the ideXlab platform.

  • Development of carboxyl-functionalized Multi-Walled Nanotube/polydimethylsiloxane novel polymeric nanodielectric material
    Materials Letters, 2018
    Co-Authors: Shanshan Guan, Hai Li, Shichuan Song, Guangshuai Mo, Shugao Zhao
    Abstract:

    Abstract In this paper, we develop a new type of polydimethylsiloxane (PDMS)-based nanocomposite by incorporating carboxyl-functionalized Multi-Walled Nanotube (MWCNT) to the polymer matrix as fillers. The dispersion of MWCNT during the material processing plays a significant role in deciding the final properties of the nanocomposites. A rapid evaporation and stirring method was used to minimize re-aggregation of the fillers during MWCNT/PDMS composites fabrication processing by solution blending. Furthermore, dispersions of MWCNT in solvents were investigated to correlate the degree of dispersion state with Hansen solubility parameters. The result indicated that carboxyl group can impart negative charges and create the long-term electrostatic stability of MWCNT in the solvents. The resultant MWCNT/PDMS composites exhibited high permittivity, low dielectric loss, and low percolation threshold.

  • Novel three-component nanocomposites with high dielectric permittivity and low dielectric loss co-filled by carboxyl-functionalized Multi-Walled Nanotube and BaTiO3
    Composites Science and Technology, 2018
    Co-Authors: Shanshan Guan, Shugao Zhao, Hai Li, Laina Guo
    Abstract:

    In this work, a novel ternary polydimethylsiloxane (PDMS)-based nanocomposite co-filled by carboxyl-functionalized Multi-Walled Nanotube (cMWCNT) and BaTiO3(BT) nanoparticle were developed. The hybrids cMWCNT-BT was realized via the hydrogen bonding (H-bonding) interaction between –COOH groups of cMWCNT and the -OH groups of BT. Compared with the binary composite of BT/PDMS and cMWCNT/PDMS, the results showed that the kind of three-component nanocomposites had high dielectric permittivity and low dielectric loss. Different from cMWCNT, the hybrids cMWCNT-BT have good dispersion in PDMS matrix, forming many micro-capacitors and interfaces, and thus leading to remarkably high dielectric constant. Meanwhile, BT on the surfaces of cMWCNT reduce the direct contact of cMWCNT, resulting in reduced dielectric loss. More important, the BT and cMWCNT had a synergistic effect on dielectric permittivity of the cMWCNT-BT/PDMS composite. Therefore, the dielectric properties of the novel ternary composite can be improved by optimizing the synergistic effects between the charge storage behavior of the ferroelectric phase and the charge transport behavior of the conductive phase.

Hai Li - One of the best experts on this subject based on the ideXlab platform.

  • Development of carboxyl-functionalized Multi-Walled Nanotube/polydimethylsiloxane novel polymeric nanodielectric material
    Materials Letters, 2018
    Co-Authors: Shanshan Guan, Hai Li, Shichuan Song, Guangshuai Mo, Shugao Zhao
    Abstract:

    Abstract In this paper, we develop a new type of polydimethylsiloxane (PDMS)-based nanocomposite by incorporating carboxyl-functionalized Multi-Walled Nanotube (MWCNT) to the polymer matrix as fillers. The dispersion of MWCNT during the material processing plays a significant role in deciding the final properties of the nanocomposites. A rapid evaporation and stirring method was used to minimize re-aggregation of the fillers during MWCNT/PDMS composites fabrication processing by solution blending. Furthermore, dispersions of MWCNT in solvents were investigated to correlate the degree of dispersion state with Hansen solubility parameters. The result indicated that carboxyl group can impart negative charges and create the long-term electrostatic stability of MWCNT in the solvents. The resultant MWCNT/PDMS composites exhibited high permittivity, low dielectric loss, and low percolation threshold.

  • Novel three-component nanocomposites with high dielectric permittivity and low dielectric loss co-filled by carboxyl-functionalized Multi-Walled Nanotube and BaTiO3
    Composites Science and Technology, 2018
    Co-Authors: Shanshan Guan, Shugao Zhao, Hai Li, Laina Guo
    Abstract:

    In this work, a novel ternary polydimethylsiloxane (PDMS)-based nanocomposite co-filled by carboxyl-functionalized Multi-Walled Nanotube (cMWCNT) and BaTiO3(BT) nanoparticle were developed. The hybrids cMWCNT-BT was realized via the hydrogen bonding (H-bonding) interaction between –COOH groups of cMWCNT and the -OH groups of BT. Compared with the binary composite of BT/PDMS and cMWCNT/PDMS, the results showed that the kind of three-component nanocomposites had high dielectric permittivity and low dielectric loss. Different from cMWCNT, the hybrids cMWCNT-BT have good dispersion in PDMS matrix, forming many micro-capacitors and interfaces, and thus leading to remarkably high dielectric constant. Meanwhile, BT on the surfaces of cMWCNT reduce the direct contact of cMWCNT, resulting in reduced dielectric loss. More important, the BT and cMWCNT had a synergistic effect on dielectric permittivity of the cMWCNT-BT/PDMS composite. Therefore, the dielectric properties of the novel ternary composite can be improved by optimizing the synergistic effects between the charge storage behavior of the ferroelectric phase and the charge transport behavior of the conductive phase.

Seiichi Nomura - One of the best experts on this subject based on the ideXlab platform.

  • On the effective thermal conductivity of carbon Nanotube reinforced polymer composites
    Composites Science and Technology, 2006
    Co-Authors: Aniruddha Bagchi, Seiichi Nomura
    Abstract:

    In this paper, a theoretical model has been developed for predicting the effective thermal conductivity of an aligned Multi-Walled Nanotube polymer composite. This model is based on an effective medium theory that has been developed for composites containing aligned spheroidal inclusions with imperfect interfaces. To incorporate the Nanotube structure into this theory, a continuum model of the Nanotube geometry is developed by considering its structure and the mechanism of heat conduction through it. Results show that the overall conductivity will be much lower than expected due to the fact that in the composite, the outer Nanotube layer carries the bulk of the heat flowing through the Nanotube. It is also seen that the high Nanotube-matrix boundary resistance does not significantly affect the overall conductivity. The effective conductivity was also found to be highly sensitive to the Nanotube diameter. © 2005 Elsevier Ltd. All rights reserved.