Soap films

From Soft-Matter
Revision as of 05:11, 4 December 2011 by Daniel (Talk | contribs)

Jump to: navigation, search

Contributed by Daniel Daniel

Introduction

Soap films are thin layers of liquid (usually water) surrounded by air. A soap bubble is essentially of a thin layer of water film that separates the air inside and outside of the bubble. Another example where soap films are found is foam, which consists of a network of thin water films that are connected in accordance to Plateau's laws, which will be explained in a later section. Soap films are stable due to the presence of surfactants, usually ampiphilic molecules, such as sodium dodecyl sulfate which has a hydrophilic head that interacts preferentially with water and a hydrophobic tail that interacts preferentially with air. This is schematically shown in figure 1.

Soapfilm1.png Figure 1.

Physics of soap film

Soapfilm2.jpg

Soapfilm4.jpg

Plateau's laws

Soapfilm3.jpg



http://www.soapbubble.dk/en/bubbles/geometry.php

Keyword in references:

A public study of the lifetime distribution of soap films