Methods for modifying the surfaces of a solid and microstructured surfaces with increased adherence produced with said methods
AssigneeMax-Planck-Gesellschaft zur Foerdurung der Wissenschafter E.V.
InventorsEduard Arzt, Stanislav Gorb, Huajian Gao, Ralf Spolenak
Life of this patent
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Abstract
Described are methods for surface modification of an object (10) in order to increase the adhesive power of the object, wherein the surface (11) is subjected to structuring so that a multitude of projections (12) are formed, each comprising a foot part and a head part, wherein the head part comprises a front surface (13) which faces away from the surface, wherein each projection (12) is made in a size such that all front surfaces (13) project to the same vertical height above the surface (11), and form an adherent contact surface (14) which is interrupted by mutual spacing between the front surfaces (13).
Claims25
A structured solid having a contact surface, said contact surface comprising:
- a structure having a multitude of projections, each projection having a foot part and a head part;
- wherein each head part has a front surface which faces away from the contact surface, the contact surface being formed by a totality of the front surfaces of the multitude of projections;
- wherein the contact surface is adapted to adhere to a surface of another object by van der Waals forces without establishing an anchorage and without interlocking of the projections;
- wherein the projections are elastic and inclined in relation to the contact surface, and
- wherein each of the projections has a radial gradient of modulus of elasticity in the foot part, whereby the modulus of elasticity gradually decreases in a radial direction through the bulk of the projection starting from the axial center of the foot part to the outer surface of the foot part;
- and
- wherein the front surfaces of the multitude of projections provide said adherence to the surface of another object by van der Waals forces without an adhesive.
A structured solid having a contact surface, said contact surface comprising:
- a plurality of projections, each projection having a foot part and a head part;
- wherein each head part has a front surface which faces away from the contact surface, the contact surface being formed by a totality of the front surfaces of the plurality of projections;
- wherein the contact surface is adapted to adhere to a surface of another object by van der Waals forces without establishing an anchorage and without interlocking of the projections;
- wherein the projections are elastic, and
- wherein each of the projections has a radial gradient of modulus of elasticity in the foot part, whereby the modulus of elasticity gradually decrease in a radial direction through the bulk of the projection starting from the axial center of the foot part to the outer surface of the foot part such that the modulus of elasticity of the foot part of each projection at its axial center is greater than the modulus of elasticity of the foot part of each projection at its outer surface;
- and
- wherein the front surfaces of the plurality of projections provide said adherence to the surface of another object by van der Waals forces without an adhesive.
Dependencies are inferred from the claim text.