Electrochemical grafting of carbon fibers with aliphatic amines for improved composite strength

    公开(公告)号:US11225754B2

    公开(公告)日:2022-01-18

    申请号:US16604595

    申请日:2018-04-11

    摘要: The surface of a carbon fiber is electrochemically treated by a method to form nitrogen containing groups on the surface of the carbon fiber. The method comprises contacting a carbon fiber surface with an aqueous solution comprised of a non-cyclic aliphatic amine and water soluble inorganic hydroxide with said aqueous solution having a pH of at least 9. A positive electrical bias is then applied to the carbon fibers in the aqueous solution relative to another electrode in contact with the aqueous solution, wherein the positive electrical bias is at a voltage above the oxidation potential of water. The treated carbon fibers are useful for making epoxy reinforced carbon fiber composites.

    Fiber sizing agent, fiber material, molding material and molding

    公开(公告)号:US11168187B2

    公开(公告)日:2021-11-09

    申请号:US16612104

    申请日:2018-05-08

    申请人: DIC Corporation

    发明人: Kenji Nagao

    摘要: A fiber sizing agent includes: a vinyl ester resin (A) having an alkoxy polyoxyalkylene structure and a urethane bond; and an aqueous medium. The fiber sizing agent has excellent fiber sizing properties for various fibers such as glass fibers and carbon fibers. A molded article obtained from a molding material including the fiber sizing agent is excellent in various physical properties such as bending strength, compressive strength, and interlaminar shear strength, and thus can be used, for example, for an automobile member, an aircraft member, a windmill member, and an industrial member.

    Composite material and molded article

    公开(公告)号:US10458061B2

    公开(公告)日:2019-10-29

    申请号:US14786722

    申请日:2014-04-23

    申请人: Nitta Corporation

    摘要: Provided are: a composite material capable of exhibiting the original functions of a base material thereof and also capable of exhibiting functions derived from CNTs, such as electrical conductivity, heat conductivity, and mechanical strength; and a molded article therefrom. A composite material comprising a base material and a structure formed on the surface of the base material, the structure including a plurality of carbon nanotubes, wherein the plurality of carbon nanotubes form a network structure, in which the carbon nanotubes are directly connected with one another and also directly adhere to the surface of the base material.