Composite material and preparation method thereof

Composite material and preparation method thereof

  • CN 106,340,406 B
  • Filed: 08/30/2016
  • Issued: 09/22/2020
  • Est. Priority Date: 08/30/2016
  • Status: Active Grant
First Claim
Patent Images

1. A composite material characterized by:

  • the rubber containing solvent or volatile substances and the porous metal are subjected to hot vulcanization molding or radiation curing molding to prepare a composite material with the thickness of 0.01-10mm and with two materials of the metal and the rubber simultaneously exposed on at least one surface;

    the holes in the porous metal in the composite material are partially or completely filled with the rubber during hot vulcanization molding or radiation curing molding to realize the crosslinking or curing of the rubber, and then the composite material is placed at room temperature and placed under vacuum to be baked or vacuum baked to evaporate or volatilize the solvent or volatile substances in the composite material, so that the rubber phase in the composite material is shrunk and collapsed, and the porous metal protrudes out of the surface of the composite material;

    said solvent or volatile substance does not chemically react with said rubber;

    the porous metal is a metal sheet with a plurality of holes, a sintered metal mesh, a metal plate mesh, metal foam or a metal fiber sintered felt, or a layered composite of the metal sheet, the sintered metal mesh, the metal plate mesh, the metal foam and the metal fiber sintered felt;

    the holes are independent or mutually communicated;

    at least part of the holes are exposed out of the surface of the porous metal;

    the diameter of the hole is 1 mu m-3.0 mm;

    the porous metal holes are uniformly distributed, the aperture is 50 mu m-0.5mm, the hole spacing is 25 mu m-1.0mm, and the hole pattern is circular, regular polygon or other geometric shapes;

    the porous metal is composed of aluminum, iron, cobalt, nickel, copper, zinc, tin, titanium, manganese, tungsten, silver, gold or alloy thereof;

    the porous metal is free of or contains a metal coating;

    the metal coating is completely or partially covered on the outer surface of the porous metal and the inner surface of the porous metal hole;

    the outer surface of the porous metal and the inner surfaces of the holes are coated with a layer of adhesion promoter, coupling agent or primer with the average thickness of not more than 1 mu m;

    the rubber is prepared from diene liquid rubber, alkene liquid rubber, polyurethane liquid rubber, acrylate liquid rubber, liquid polysulfide rubber, silicon liquid rubber, fluorine liquid rubber or corresponding solid raw rubber;

    the rubber is prepared from a radiation-curable liquid rubber or a viscous mixture;

    the solvent or volatile substance is a rubber compatible or partially compatible solvent, a volatile liquid, a volatile solid, or a mixture thereof;

    the solvent or volatile substance is iodine, sulfur, p-dichlorobenzene, phenol, adamantane, naphthalene, anthracene, phenanthrene, camphor, menthol, caffeine;

    the composite material is prepared by combining non-crosslinked rubber containing solvent or volatile substances with porous metal in a mode of superposition, transfer printing, silk-screen printing, brush coating, roller brush coating, blade coating, spray coating, dip coating, curtain coating or pump coating, and then realizing crosslinking or curing through hot vulcanization molding or radiation curing molding, so that two materials of metal and rubber with the thickness of 0.01-10mm are exposed on at least one surface simultaneously;

    then, the obtained composite material is placed at room temperature, placed under vacuum, baked or baked in vacuum, so that the solvent or the volatile substance in the composite material is evaporated or volatilized, and the rubber phase in the composite material is shrunk and collapsed, so that the metal material protrudes out of the surface of the composite material;

    the hot vulcanization molding is to press the uncrosslinked rubber and the porous metal which are combined together in a mold at a temperature higher than room temperature to cause the rubber to generate crosslinking reaction;

    the radiation curing molding is to carry out ultraviolet radiation and electron beam radiation on the uncrosslinked rubber and the porous metal which are combined together in a mold so as to cause the rubber to generate crosslinking reaction.

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