The Experts below are selected from a list of 126 Experts worldwide ranked by ideXlab platform

P J Herrerafranco - One of the best experts on this subject based on the ideXlab platform.

  • chemical modification of henequen fibers with an Organosilane Coupling Agent
    Composites Part B-engineering, 1999
    Co-Authors: A Valadezgonzalez, J M Cervantesuc, Roberto Olayo, P J Herrerafranco
    Abstract:

    Short henequen fibers were modified with a silane Coupling Agent in order to find out its deposition mechanism on the fiber surface and the influence of this chemical treatment on the mechanical properties of the composite. It was shown that the partial removal of lignin and other alkali soluble compounds from the fiber surface increases the adsorption of the silane Coupling Agent whereas the formation of polysiloxanes inhibits this process. The existence of a chemical bond between the Coupling Agent and the henequen fiber was confirmed by XPS and FTIR spectroscopy. It was further verified that the interaction between the fiber and the matrix is much stronger when the fiber surface topography is combined with the chemical modification of the fiber surface with a silane Coupling Agent.

Karine Heuzé - One of the best experts on this subject based on the ideXlab platform.

  • Resolving the chemical nature of nanodesigned silica surface obtained via a bottom-up approach.
    ACS applied materials & interfaces, 2013
    Co-Authors: Hakim Rahma, Thierry Buffeteau, Colette Belin, Gwénaëlle Le Bourdon, Marie Degueil, Bernard Bennetau, Luc Vellutini, Karine Heuzé
    Abstract:

    The covalent grafting on silica surfaces of a functional dendritic Organosilane Coupling Agent inserted, in a long alkyl chain monolayer, is described. In this paper, we show that depending on experimental parameters, particularly the solvent, it is possible to obtain a nanodesigned surface via a bottom-up approach. Thus, we succeed in the formation of both homogeneous dense monolayer and a heterogeneous dense monolayer, the latter being characterized by a nanosized volcano-type pattern (4-6 nm of height, 100 nm of width, and around 3 volcanos/μm(2)) randomly distributed over the surface. The dendritic attribute of the grafted silylated Coupling Agent affords enough anchoring sites to immobilize covalently functional gold nanoparticles (GNPs), coated with amino PEG polymer to resolve the chemical nature of the surfaces and especially the volcano type nanopattern structures of the heterogeneous monolayer. Thus, the versatile surface chemistry developed herein is particularly challenging as the nanodesign is straightforward achieved in a bottom-up approach without any specific lithography device.

Xiao-han Jin - One of the best experts on this subject based on the ideXlab platform.

  • Electrodeposited silica films post-treated with Organosilane Coupling Agent as the pretreatment layers of organic coating system
    Corrosion Science, 2016
    Co-Authors: Yan-hua Liu, Xiao-han Jin
    Abstract:

    Abstract This work presents a new type of coating system based on the use of electrodeposited SiO 2 (E-SiO 2 ) film post-treated with (3-glycidoxypropyl)-trimethoxysilane (GPTMS) as the pretreatment layer. The silane-modified E-SiO 2 films take advantage of not only the highly rough and porous features provided by E-SiO 2 skeleton, but also the chemical functionalization offered by Organosilane molecule. As a result, the composite pretreatment layer provides improved adhesion to the topcoat. In addition, the experimental results of electrochemical impedance spectroscopy, salt spray test, iron-dissolution measurement and the scanning vibrating electrode technique suggest that painting system constructed on GPTMS-treated E-SiO 2 films exhibits excellent corrosion performance.

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

  • chemical modification of henequen fibers with an Organosilane Coupling Agent
    Composites Part B-engineering, 1999
    Co-Authors: A Valadezgonzalez, J M Cervantesuc, Roberto Olayo, P J Herrerafranco
    Abstract:

    Short henequen fibers were modified with a silane Coupling Agent in order to find out its deposition mechanism on the fiber surface and the influence of this chemical treatment on the mechanical properties of the composite. It was shown that the partial removal of lignin and other alkali soluble compounds from the fiber surface increases the adsorption of the silane Coupling Agent whereas the formation of polysiloxanes inhibits this process. The existence of a chemical bond between the Coupling Agent and the henequen fiber was confirmed by XPS and FTIR spectroscopy. It was further verified that the interaction between the fiber and the matrix is much stronger when the fiber surface topography is combined with the chemical modification of the fiber surface with a silane Coupling Agent.

Hakim Rahma - One of the best experts on this subject based on the ideXlab platform.

  • Resolving the chemical nature of nanodesigned silica surface obtained via a bottom-up approach.
    ACS applied materials & interfaces, 2013
    Co-Authors: Hakim Rahma, Thierry Buffeteau, Colette Belin, Gwénaëlle Le Bourdon, Marie Degueil, Bernard Bennetau, Luc Vellutini, Karine Heuzé
    Abstract:

    The covalent grafting on silica surfaces of a functional dendritic Organosilane Coupling Agent inserted, in a long alkyl chain monolayer, is described. In this paper, we show that depending on experimental parameters, particularly the solvent, it is possible to obtain a nanodesigned surface via a bottom-up approach. Thus, we succeed in the formation of both homogeneous dense monolayer and a heterogeneous dense monolayer, the latter being characterized by a nanosized volcano-type pattern (4-6 nm of height, 100 nm of width, and around 3 volcanos/μm(2)) randomly distributed over the surface. The dendritic attribute of the grafted silylated Coupling Agent affords enough anchoring sites to immobilize covalently functional gold nanoparticles (GNPs), coated with amino PEG polymer to resolve the chemical nature of the surfaces and especially the volcano type nanopattern structures of the heterogeneous monolayer. Thus, the versatile surface chemistry developed herein is particularly challenging as the nanodesign is straightforward achieved in a bottom-up approach without any specific lithography device.

  • Resolving the Chemical Nature of Nanodesigned Silica Surface Obtained via a Bottom-up Approach
    2013
    Co-Authors: Hakim Rahma, Thierry Buffeteau, Colette Belin, Marie Degueil, Bernard Bennetau, Luc Vellutini, Gwenaëlle Le Bourdon, Karine Heuzé
    Abstract:

    The covalent grafting on silica surfaces of a functional dendritic Organosilane Coupling Agent inserted, in a long alkyl chain monolayer, is described. In this paper, we show that depending on experimental parameters, particularly the solvent, it is possible to obtain a nanodesigned surface via a bottom-up approach. Thus, we succeed in the formation of both homogeneous dense monolayer and a heterogeneous dense monolayer, the latter being characterized by a nanosized volcano-type pattern (4–6 nm of height, 100 nm of width, and around 3 volcanos/μm2) randomly distributed over the surface. The dendritic attribute of the grafted silylated Coupling Agent affords enough anchoring sites to immobilize covalently functional gold nanoparticles (GNPs), coated with amino PEG polymer to resolve the chemical nature of the surfaces and especially the volcano type nanopattern structures of the heterogeneous monolayer. Thus, the versatile surface chemistry developed herein is particularly challenging as the nanodesign is straightforward achieved in a bottom-up approach without any specific lithography device