20 Magical Materials

Published on October 30, 2012

Date: 15th – 21st of October 2012
Place: Danish Design Centre, H.C. Andersens Boulevard 27, 1553 Copenhagen V

Danish Design Center

Danish Society for Materials Technology; DSM, Futation and the Danish Design Centre presented an exhibition with 20 fascinating materials, all with ‘special features’. Experience magnetic liquid, glow-in-the-dark stones, metal that melts between your fingers, water-soluble plastic and many other exciting materials.

· Vulcanising Silicone Rubber
Can be formed by hand but cures to a hard rubber in 24 hours.
Material: A special form of silicone that sticks to most materials and cures (vulcanises) when it gets into contact with the moisture in the air. It is packaged in small, airtight bags.
Examples of use: Repairing and modifying things around the house. (Sugru)

· Expanding Graphite
Expands when heated.
Material: Graphite flakes that expand when heated. In between the graphite layers, a substance has been inserted that changes to a gaseous state when heated. When it transforms to a gas, the substance expands, and the individual layers of the graphite flakes are pried apart. The effect occurs at temperatures above 150°C. Example of use: Fire-retardant materials for the construction industry. (Graftechaet)

· Ferrofluid
Magnetic liquid.
Material: Oil with a suspension of microscopic magnetic particles.
Examples of use: Increasing the magnetic field around coils in loudspeakers and shock absorbers whose properties can be modified by means of a magnetic field. (Ferrotec)

· Rheoscopic Fluid
Visualises liquid currents. 
Material: A rheoscopic fluid contains microscopic flakes that align with the flow of currents in the liquid. The flakes reflect light and thus render the currents visible.
Examples of use: Teaching and studying fluid flow. (Kalliroscope)

· Magnetic Field Film
Visualises magnetic fields.
Material: The film contains tiny transparent spheres filled with iron filings. The magnet makes the filings line up in the same direction, thus visualising the magnetic field.
Example of use: Analysing magnetic fields in the production of items containing magnets. (Magnerite)


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