Microporous dry adhesive films, methods of making, and methods of use
AssigneeUniversity of Florida Research Foundation, Inc.
InventorsPeng Jiang, Yifan Zhang, Calen Leverant, Curtis Taylor
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Abstract
Provided herein are materials, methods of making materials, and methods of use, wherein the materials have switchable adhesive properties. Materials of the present disclosure can reversibly change coloration in conjunction with the changing adhesive state. The films, made from a porous polymer material, can be reversibly changed from a smooth state to a rough state, allowing for reversible and tunable gripping and/or adhesive properties.
Claims20
A method for fabricating a porous polymer material having switchable adhesion, comprising:
- providing a plurality of particles in a volume between a first surface of a first substrate and at least one opposing second surface of a second substrate, wherein the plurality of particles includes an ordered array of nanoparticles;
- adding a shape memory polymerizable material into the volume between the opposing first and second surfaces to surround the particles;
- polymerizing the shape memory polymerizable material to form a polymer framework around the particles;
- exposing the polymer framework to oxygen plasma etching;
- and
- removing the particles to form an ordered array of voids in the polymer framework.
A porous polymer material having switchable adhesion, where the porous polymer material comprises a shape memory polymeric material comprising ordered voids;
- wherein the porous polymer material has a starting state, a deformed state, and a recovered state;
- wherein when in the deformed state, the porous polymer material has a surface roughness that is about 1 to 4 times greater than when in the starting state or the recovered state;
- and
- wherein when in the deformed state, the porous polymer material has a lower adhesion than when in the starting state or the recovered state.
A method of using a porous polymer material having switchable adhesion comprising:
- exposing the porous polymer material to a first stimulus to transition the porous polymer material from a starting state to a deformed state;
- wherein the material has an adhesive property when in the starting state.
Dependencies are inferred from the claim text.