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Tunable Adhesion

Description:

Brief Description

Turning adhesion on or off to open new possibilities for process control

 

Inventor

Kevin Turner (http://turner.seas.upenn.edu/)

 

Problem

Advanced manufacturing processes require methods to delicately handle fragile materials. Certain materials are too compliant and brittle to transfer them with vacuum or mechanical handling, and traditional adhesives may leave behind an unacceptable residue. Some researchers have experimented with bio-inspired adhesion, but these systems are difficult to apply on an industrial scale. A way to temporarily adhere to surfaces during assembly would open up new methods of manufacturing for semiconductors, electronics, and other products.

 

Solution

Researchers at the University of Pennsylvania have developed a new tunable composite material with high adhesion under normal loading and weak adhesion when shear is applied, making the surface adhesion easily controllable. A micro-scale composite structure is patterned using a stiff post surrounded by a compliant core. A contact surface made up of an array of these posts has strong adhesion in the normal direction but can be easily removed by applying a shear force. This makes manipulation of thin layers of delicate material possible, because no damaging handling forces are applied, and no residue is left behind. Adhesive contact surfaces that use this method can easily be produced on a large scale, making this technology a practical solution as an applied process improvement.

 

Advantages

•       Control over adhesion with no residue or handling damage

•       Easy to manufacture and scale to component-size structures

 

Stage of Development

Prototype developed on the scale of 1.5” x 1.5”

 

Intellectual Property

Patent application pending

 

Reference Media

 

Minsky, H. K., & Turner, K. T. (2015). Achieving enhanced and tunable adhesion via composite posts. Applied Physics Letters, 106(20), 201604.

 

http://scitation.aip.org/content/aip/journal/apl/106/20/10.1063/1.4921423

https://news.upenn.edu/news/penn-researchers-develop-new-type-gecko-gripper

 

Desired partnerships

• License or Sponsored Research  

 

Download PDF

 

Docket #  14-7050

 


Patent Information:
For Information, Contact:
Joshua Jeanson
Associate Director, SEAS/SAS Licensing Group
University of Pennsylvania
jeanson@upenn.edu
Inventors:
Kevin Turner
Keywords:
Engineering