Dry adhesive with a selective adhesitivity

Abstract

A selective adhesive mechanism comprises an engineered surface structure or substrate and a compliant member. The compliant member is able to be a dry and non-tacky substance. The compliant member is selectively adhesive to the engineered surface when the compliant member is in contact with the engineered surface. The compliant member shows adhesion to the engineered surface when the compliant member is within a pre-selected range of hardness. In some embodiments, the compliant member comprises a polymeric member, a thermoplastic elastomer, silicone, polyurethane, or a combination thereof.

1 - 26 . (canceled) 
     
     
         27 . A selective reversible adhesive material comprising:
 a) a coated engineered surface having pores formed by imperfect packing of particles; and   b) a compliant member comprising a polymer having a hardness in a durometer scale that is 55 Shore A or lower, wherein the compliant member deforms to fill in the pores forming a selective adhesivity toward the coated engineered surface when the compliant member is in physical contact with the coated engineered surface.   
     
     
         28 . The selective reversible adhesive material of  claim 27 , wherein the compliant member comprises an elastomeric material. 
     
     
         29 . The selective reversible adhesive material of  claim 28 , wherein the elastomeric material comprises styrene-butadiene. 
     
     
         30 . The selective reversible adhesive material of  claim 27 , wherein the coated engineered surface is spray coated. 
     
     
         31 . The selective reversible adhesive material of  claim 27 , wherein the coated engineered surface is liquid coated. 
     
     
         32 . The selective reversible adhesive material of  claim 27 , wherein the compliant member comprises a non-tacky surface. 
     
     
         33 . The selective reversible adhesive material of  claim 27 , wherein the coated engineered surface comprises a non-tacky surface. 
     
     
         34 . The selective reversible adhesive material of  claim 27 , wherein the compliant member is configured to repeatedly adhere to and be removed from the coated engineered surface without substantial damages to the compliant member and the coated engineered surface. 
     
     
         35 . The selective reversible adhesive material of  claim 27 , wherein the compliant member is configured to instantly adhere to and be removed from the sprayed-coated engineered surface without substantial damages to the compliant member and the engineered surface. 
     
     
         36 . An adhesive material comprising:
 a) a liquid coated surface having pores formed by imperfect packing of particles; and   b) a compliant member having a hardness in a durometer scale that is 55 Shore A or lower, wherein the compliant member deforms to fill in the pores forming a selective adhesivity toward the liquid coated surface when the compliant member is in physical contact with the liquid coated surface.   
     
     
         37 . The adhesive material of  claim 36 , wherein the compliant member comprises block polymer. 
     
     
         38 . The adhesive material of  claim 36 , wherein the block polymer comprises styrene-butadiene. 
     
     
         39 . The adhesive material of  claim 36 , wherein the compliant member comprises an elastomeric material. 
     
     
         40 . The adhesive material of  claim 39 , wherein the elastomeric material comprises a thermoplastic elastomer. 
     
     
         41 . The adhesive material of  claim 40 , wherein the thermoplastic elastomer comprises polystyrene-polybutadiene-polystyrene polymers (S-B-S), polystyrene-polyisoprene-polystyrene polymers (S-I-S), polystyrene-poly(ethylene/butylene)-polystyrene polymers (S-EB-S), polystyrene-poly(ethylene/propylene)-polystyrene polymers (S-EP-S), or a combination thereof. 
     
     
         42 . The adhesive material of  claim 39 , wherein the elastomeric material comprises natural rubber (NR), polyisoprene (IR), chloroprene rubber (CR), butyl rubber (BR), polybutadiene rubber (BR), nitrile rubber (NBR), styrene-butadiene rubber (SBR), ethylene propylene copolymer (EPDM), silicone rubber, ethylene-vinyl acetate (EVA), chlorosulfonated polyethylene (CSM), polyacrylic rubber (ACM), flourosilicone rubber, flouroelastomer, perflouroelastomer, polyether block amide (PEBA), chlorosulfonated polyethylene, thermoplastic elastomer, thermoplastic urethane, thermoplastic olefins (TPO), thermoplastic vulcanizates (TPV), or a combination thereof. 
     
     
         43 . A method of forming a selective reversible adhesive material comprising:
 a) coating a surface forming pores by imperfect packing sprayed particles;   b) forming a polymeric compliant member having a hardness in a durometer scale that is 55 Shore A or lower; and   c) forming a selective adhesive bonding by deforming the polymeric compliant member to fill in the pores.   
     
     
         44 . The method of  claim 43 , wherein coating comprises spray coating. 
     
     
         45 . The method of  claim 43 , wherein coating comprises liquid coating. 
     
     
         46 . The method of  claim 43 , wherein the polymeric compliant member contains styrene-butadiene. 
     
     
         47 . The method of  claim 43 , wherein the polymeric compliant member comprises a non-tacky surface. 
     
     
         48 . The method of  claim 43 , wherein the surface comprises a non-tacky surface. 
     
     
         49 . The method of  claim 43 , further comprising using the polymeric compliant member to repeatedly adhere to and be removed from the surface without substantial damages to the polymeric compliant member and the surface. 
     
     
         50 . The method of  claim 43 , further comprising using the polymeric compliant member to instantly adhere to and be removed from the surface without substantial damages to the polymeric compliant member and the surface. 
     
     
         51 . The method of  claim 43 , wherein the compliant member comprises silicone or polyurethane. 
     
     
         52 . The method of  claim 43 , wherein the compliant member comprises silicone rubber having a selective adhesiveness to the surface when a hardness of the compliant member is lower than 42 Shore A. 
     
     
         53 . The method of  claim 43 , wherein the compliant member comprises polyurethane having a selective adhesiveness to the surface when a hardness of the compliant member is lower than 55 Shore A.