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Chemistry for Engineering Students

4th Edition
Lawrence S. Brown + 1 other
ISBN: 9781337398909

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BuyFindarrow_forward

Chemistry for Engineering Students

4th Edition
Lawrence S. Brown + 1 other
ISBN: 9781337398909
Textbook Problem

8.90 Geckos are known for their ability to climb smooth vertical walls or windows. Recent research has shown that this unusual trait results from dispersion forces between the surface and the tips of tiny hairlike setae an the Gecko’s feet. Many materials science and engineering groups are working to develop tapes and other adhesives designed to mimic this behavior. Do a web search to find information about such efforts and write a short summary explaining how one resulting adhesive is related to ideas we explored in this chapter.

Interpretation Introduction

Interpretation:

A short summary should be written to explain how researches over Geckos have resulted into adhesive designing.

Concept introduction:

Geckos have capacity to climb smooth vertical walls through the tips of its tiny hair like setae in its feet.

As per the researches, this climbing occurs due to the Van der waal’s forces between the setae of its feet and the surface of the walls.

The researches are done to create such adhesive or tapes which could mimic this behavior.

Explanation

The Gecko applies a Van−der waal force between the surface of walls and the hair like setae of its feet.

This force of attraction helps them to adhere to the wall and in result they can climb the vertical walls very easily.

The van der waal attractions are weak and they take very less energy to occur which helps in easier movement. Keeping the fact in mind, the researches have been done to develop an adhesive which could work on similar mechanism of adhesion.

In initial days, few polymers like polydimethylsiloxane, polypropylene and polyimide etc. were developed and used.

Later in this research, the synthetic setae have been developed in the form of dry adhesives...

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