Abstract:
Methods of forming dry adhesives including a method of making a dry adhesive including applying a liquid polymer to the second end of the stem, molding the liquid polymer on the stem in a mold, wherein the mold includes a recess having a cross-sectional area that is less than a cross-sectional area of the second end of the stem, curing the liquid polymer in the mold to form a tip at the second end of the stem, wherein the tip includes a second layer stem; corresponding to the recess in the mold, and removing the tip from the mold after the liquid polymer cures.
Abstract:
Methods of forming dry adhesives including a method of making a dry adhesive including applying a liquid polymer to the second end of the stem, molding the liquid polymer on the stem in a mold, wherein the mold includes a recess having a cross-sectional area that is less than a cross-sectional area of the second end of the stem, curing the liquid polymer in the mold to form a tip at the second end of the stem, wherein the tip includes a second layer stem; corresponding to the recess in the mold, and removing the tip from the mold after the liquid polymer cures.
Abstract:
Gecko-like adhesive application devices suited for dynamic applications are disclosed, where the device can be easily applied to target substrates, exhibiting a firm hold, and subsequently released therefrom. Gecko-like adhesive application devices that are suited for sustained holding after easy application (e.g., on vertical or inclined surfaces or ceiling) also are disclosed.
Abstract:
A dry adhesive includes a first plurality of fiber segments mechanically interlocked with a second plurality of fiber segments. A dry adhesive can include a first plurality of fibers mechanically interlocked with a second plurality of fibers or a single plurality of fibers having a first end region mechanically interlocked with a second end region. The fiber segments and fibers can be aligned, electrospun nanofibers. One or more continuous and scalable methods of making aligned fibers are also provided. One or more apparatuses are also provided.
Abstract:
Methods of forming dry adhesives including a method of making a dry adhesive including applying a liquid polymer to the second end of the stem, molding the liquid polymer on the stem in a mold, wherein the mold includes a recess having a cross-sectional area that is less than a cross-sectional area of the second end of the stem, curing the liquid polymer in the mold to form a tip at the second end of the stem, wherein the tip includes a second layer stem; corresponding to the recess in the mold, and removing the tip from the mold after the liquid polymer cures.
Abstract:
A contact closure component (10) includes a carrier part (12) and closure parts (14a-14b) arranged upright on the carrier part. Each closure part (14a-14b) has at least one stem part (10a-20b) having a pre-definable longitudinal extent (Hs). At least one shaping section (26a-26b) is formed on at least one stem part (20a-20b), in at least one length section (24a-24b). The shaping section is set back at least partially with respect to an imaginary stem outer shape, in the direction of the interior of the stem. At least one shaping section (26a-26b) permits elastic deformation and/or movement longitudinally and/or transversely with respect to the longitudinal extent (Hs) of the respective stem part (20a-20b).
Abstract:
A nanocomposite dry adhesive. The nanocomposite dry adhesive includes a substrate; and an array of vertically aligned single-walled carbon nanotubes or vertically aligned multi-walled carbon nanotubes on the substrate, wherein the nanocomposite dry adhesive utilizes the array of single-walled carbon nanotubes or multi-walled carbon nanotubes as synthesized, the as synthesized single-walled carbon nanotubes being substantially free of randomly entangled nanotube segments on top of the vertically aligned single-walled carbon nanotubes, the as synthesized multi-walled carbon nanotubes having randomly entangled nanotube segments on top of the vertically aligned multi-walled carbon nanotubes; wherein the dry adhesive has a normal adhesion strength of at least about 5 N·cm−2, and a shear adhesion strength of at least about 13 N·cm−2. Methods of making a nanocomposite dry adhesive are also described.
Abstract:
Provided is a method of making durable hydrophilic and hierarchical structures containing nano and micro features used as dry adhesives. The method includes introduction of hydrophilic, nanostructured features on the micro-scale tips of fibrillar arrays through UV/Ozone (UVO) and oxygen plasma treatment; the method also includes further coating of the hierarchical structure with a polyelectrolyte via electrostatically-driven self-assembly to improve the hydrophilic stability of the treated fibril tip surfaces.
Abstract:
Unique designs, devices, systems, materials and fabrication methods are provided including adhesive closure devices that are easily released and are suitable for extended/repeated use in a variety of applications.
Abstract:
An adhesive material that contains a plurality of setae that include a stalk and spatula extending therefrom is provided. To form the adhesive material, a substantially planar substrate may be initially molded to define the setae. In this initial configuration, the setae are positioned substantially in the plane of the substrate. The substrate is then physically manipulated (e.g., folded, bent, corrugated, rotated, etc.) so that the setae become extended in an outwardly direction from the plane. Among other things, this provides a three-dimensional material having enhanced adhesive properties.