초록 ▼

This invention provides a material for vibration damping, said material comprising a composite, said composite comprising a cement matrix, and exfoliated graphite that is distributed in said composite. Said cement is preferably hydraulic cement containing calcium silicate. Said exfoliated graphite e

This invention provides a material for vibration damping, said material comprising a composite, said composite comprising a cement matrix, and exfoliated graphite that is distributed in said composite. Said cement is preferably hydraulic cement containing calcium silicate. Said exfoliated graphite exhibits a morphology that enables the physical units of exfoliated graphite to connect mechanically. The proportion of exfoliated graphite in the composite is high enough for the exfoliated graphite to connect mechanically in the presence of cement. The proportion of cement in the composite is high enough for the cement to form a continuous matrix in the composite. This invention also provides a material for vibration damping, said material comprising a composite, said composite comprising a continuous cement matrix and a graphite network, said network being mechanically connected. In addition, this invention provides a method for making a material for vibration damping, said method comprising compressing a mixture of exfoliated graphite and cement particles at a pressure that is sufficient to cause the exfoliated graphite to bind the cement particles through mechanical connection between the physical units of exfoliated graphite, and curing the cement in the presence of water that is adequate for the cement particles to bond cementitiously to one another.

대표청구항 ▼

1. A material for vibration damping, said material comprising a composite, said composite comprising(a) a cement matrix, and(b) exfoliated graphite,said graphite being in contact with said matrix,said graphite substantially exhibiting a structure,said structure consisting essentially of a network,sa

1. A material for vibration damping, said material comprising a composite, said composite comprising(a) a cement matrix, and(b) exfoliated graphite,said graphite being in contact with said matrix,said graphite substantially exhibiting a structure,said structure consisting essentially of a network,said network substantially exhibiting mechanical continuity,said network consisting essentially of a plurality of units of exfoliated graphite,each of said units substantially exhibiting a microstructure,said microstructure consisting essentially of a plurality of carbon layers,said layers being substantially interconnected,said units being connected mechanically,said connecting of said units being enabled by said microstructure. 2. The material of claim 1, wherein each of said units is substantially derived from a worm. 3. The material of claim 1, wherein said graphite in said network substantially exhibits mechanical continuity. 4. The material of claim 1 , wherein said cement consists essentially of hydraulic cement. 5. The material of claim 1 , wherein said continuity is substantially enabled by a mechanism, said mechanism consisting essentially of mechanical interlocking between said units, said interlocking being enabled by said microstructure. 6. The material of claim 1, wherein said graphite is in an amount ranging from 2% to 20% by volume of the composite. 7. A method for making a material for vibration damping, said material comprising a composite, said composite comprising(i) a continuous cement matrix, and(ii) a graphite network,said method comprising(a) forming a mixture consisting essentially of graphite and cement particles, said graphite consisting essentially of plurality of pieces,each of said pieces consisting essentially of exfoliated graphite,said exfoliated graphite substantially exhibiting a microstructure,said microstructure consisting essentially of a plurality of carbon layers,said layers being substantially interconnected, andsaid cement particles not having undergone substantial hydration,(b) compressing said mixture to substantially form a compact, said cement articles not having uncle one substantial hydration during said compression,said pieces being mechanically connected in said compact,said connection substantially resulting in a network,said network substantially exhibiting mechanical continuity,said connection being enabled by said microstructure, and(c) subjecting said cement in said compact to substantial hydration. 8. The method of claim 7, wherein said cement consists essentially of hydraulic cement, said cement particles exhibiting particle size less than 100 μm. 9. The method of claim 7, wherein each of said pieces consists essentially of a worm. 10. The method of claim 7, wherein said exfoliated graphite is substantially derived from graphite in flake form. 11. The method of claim 7, wherein said forming of said mixture is conducted using a method consisting essentially of dry mixing. 12. The method of claim 7, wherein said subjecting of said cement in said compact to substantial hydration is conducted using a method consisting essentially of (a) exposure to moisture, and(b) immersion in water. 13. The method of claim 7, wherein said compressing is conducted at a pressure ranging from 1 MPa to 30 Mpa. 14. A material for vibration damping, said material comprising a composite, said composite comprising(a) a continuous cement matrix, and(b) network,said network consisting essentially of graphite,said graphite in said network substantially exhibiting mechanical continuity,said network comprising units,each of said units consisting essential of graphite,each of said units being in contact with said matrix,said units being mechanically connected,each of said units substantially exhibiting a microstructure,said microstructure consisting essentially of a plurality of carbon layers,said layers being substantially interconnected,said microstructure enabling said units to connect mechanically. 15. The material of claim 14, wherein said cement consists essentially of hydraulic cement. 16. The material of claim 14, wherein said graphite is substantially derived from exfoliated graphite. 17. The material of claim 14, wherein each of said units is substantially derived from a worm. 18. The material of claim 14, wherein said graphite is substantially derived from exfoliated graphite, said exfoliated graphite being substantially derived from graphite flakes. 19. The material of claim 14, wherein said graphite is in an amount ranging from 2% to 20% by volume of the composite. 20. The material of claim 14, wherein said continuity is substantially enabled by a mechanism, said mechanism consisting essentially of mechanical interlocking between said units, said interlocking being enabled by said microstructure.