The Experts below are selected from a list of 117063 Experts worldwide ranked by ideXlab platform

Daisuke Sawaki - One of the best experts on this subject based on the ideXlab platform.

  • the role of steric repulsive Force in the dispersion of cement particles in fresh paste prepared with organic admixture
    Cement and Concrete Research, 1997
    Co-Authors: Hiroshi Uchikawa, Shunsuke Hanehara, Daisuke Sawaki
    Abstract:

    The existence of the steric repulsive Force has never yet been determined, though the improved dispersibility of solid particles in concrete by adding the organic admixture is considered to be primarily caused by the dispersion of solid particles by the electrostatic repulsive Force based on the formation of an electric double layer made of the admixture adsorbing to the Surface of solid particles and the increase of the Surface potential, and by the steric repulsive Force based on the interaction between the adsorption layers of admixture. The authors proved for the first time the existence of the steric repulsive Force acting on the Surface of cement particles adsorbing the organic admixture by measuring the interactive Force between Surface of cement clinker adsorbing the admixture with an atomic Force microscope, and measuring the zeta potential of fresh cement paste under actual water-to-cement ratio by electrokinetic sonic amplitude method. It is also clarified that the rate of contribution of electrostatic and steric repulsive Force to the dispersion of cement and hydrated cement particles differs by the kind of organic admixture.

Hiroshi Uchikawa - One of the best experts on this subject based on the ideXlab platform.

  • the role of steric repulsive Force in the dispersion of cement particles in fresh paste prepared with organic admixture
    Cement and Concrete Research, 1997
    Co-Authors: Hiroshi Uchikawa, Shunsuke Hanehara, Daisuke Sawaki
    Abstract:

    The existence of the steric repulsive Force has never yet been determined, though the improved dispersibility of solid particles in concrete by adding the organic admixture is considered to be primarily caused by the dispersion of solid particles by the electrostatic repulsive Force based on the formation of an electric double layer made of the admixture adsorbing to the Surface of solid particles and the increase of the Surface potential, and by the steric repulsive Force based on the interaction between the adsorption layers of admixture. The authors proved for the first time the existence of the steric repulsive Force acting on the Surface of cement particles adsorbing the organic admixture by measuring the interactive Force between Surface of cement clinker adsorbing the admixture with an atomic Force microscope, and measuring the zeta potential of fresh cement paste under actual water-to-cement ratio by electrokinetic sonic amplitude method. It is also clarified that the rate of contribution of electrostatic and steric repulsive Force to the dispersion of cement and hydrated cement particles differs by the kind of organic admixture.

Shunsuke Hanehara - One of the best experts on this subject based on the ideXlab platform.

  • the role of steric repulsive Force in the dispersion of cement particles in fresh paste prepared with organic admixture
    Cement and Concrete Research, 1997
    Co-Authors: Hiroshi Uchikawa, Shunsuke Hanehara, Daisuke Sawaki
    Abstract:

    The existence of the steric repulsive Force has never yet been determined, though the improved dispersibility of solid particles in concrete by adding the organic admixture is considered to be primarily caused by the dispersion of solid particles by the electrostatic repulsive Force based on the formation of an electric double layer made of the admixture adsorbing to the Surface of solid particles and the increase of the Surface potential, and by the steric repulsive Force based on the interaction between the adsorption layers of admixture. The authors proved for the first time the existence of the steric repulsive Force acting on the Surface of cement particles adsorbing the organic admixture by measuring the interactive Force between Surface of cement clinker adsorbing the admixture with an atomic Force microscope, and measuring the zeta potential of fresh cement paste under actual water-to-cement ratio by electrokinetic sonic amplitude method. It is also clarified that the rate of contribution of electrostatic and steric repulsive Force to the dispersion of cement and hydrated cement particles differs by the kind of organic admixture.

Neville A - One of the best experts on this subject based on the ideXlab platform.

  • Experimental and molecular dynamics simulation study of chemically stable superhydrophobic Surfaces
    'Elsevier BV', 2021
    Co-Authors: He X, Lou T, Cao P, Bai X, Yuan C, Wang C, Neville A
    Abstract:

    Experimental and molecular dynamics simulation study was used to clarify the hydrophilicity of substrate Surfaces and hydrophobicity of as-prepared Surfaces at molecular level. First, an easy one-step approach was utilized to construct superhydrophobic Surfaces on different substrates such as steel, aluminum, glass, and silicon wafer. The superhydrophobicity of as-prepared Surfaces were contributed to the fluorinated compositions and microstructures. A fluorinated Surface was constructed as a model of the as-prepared superhydrophobic Surface. Molecular dynamics simulations were utilized to elucidate the anti-wetting mechanism of as-prepared fluorinated Surfaces on aluminum substrates. Compared with the compact hydrated layer on the aluminum substrate, the hydrated layer on the fluorinated Surface were broader with a lower intensity, confirming the lower attractive Force between Surface and water molecules. The decreased van der Waals interaction with water molecules contributed to the hydrophobicity of the fluorinated Surface. While, in an alkaline solution, the electrostatic interaction had a negative impact on hydrophobicity of a fluorinated Surface

He X - One of the best experts on this subject based on the ideXlab platform.

  • Experimental and molecular dynamics simulation study of chemically stable superhydrophobic Surfaces
    'Elsevier BV', 2021
    Co-Authors: He X, Lou T, Cao P, Bai X, Yuan C, Wang C, Neville A
    Abstract:

    Experimental and molecular dynamics simulation study was used to clarify the hydrophilicity of substrate Surfaces and hydrophobicity of as-prepared Surfaces at molecular level. First, an easy one-step approach was utilized to construct superhydrophobic Surfaces on different substrates such as steel, aluminum, glass, and silicon wafer. The superhydrophobicity of as-prepared Surfaces were contributed to the fluorinated compositions and microstructures. A fluorinated Surface was constructed as a model of the as-prepared superhydrophobic Surface. Molecular dynamics simulations were utilized to elucidate the anti-wetting mechanism of as-prepared fluorinated Surfaces on aluminum substrates. Compared with the compact hydrated layer on the aluminum substrate, the hydrated layer on the fluorinated Surface were broader with a lower intensity, confirming the lower attractive Force between Surface and water molecules. The decreased van der Waals interaction with water molecules contributed to the hydrophobicity of the fluorinated Surface. While, in an alkaline solution, the electrostatic interaction had a negative impact on hydrophobicity of a fluorinated Surface