Researcher made a lightweight 18 carat gold using a matrix of plastic, Fans of gold watches and heavy jewelry will be happy. The objects of desire may one day become much lighter, but without losing their sparkle. A lightweight watch can do things differently.
No one wants to wear a heavy watch on their wrists, even if it’s made of real gold. After a while, it becomes uncomfortable and disturbing.
Researchers make a new form of gold that weighs about five to ten times lower than conventional 18 carat gold. Conventional mixtures usually consist of three quarters of gold and a quarter of copper with a density of about 15 g / cm³. This does not apply to this new gold: its density is only 1.7 g / cm3. 18 carat gold still.
How can this miraculous illumination be achieved instead of the metal alloy element? In addition, the golden light contains many mini air pockets that are not visible to the eye. Gold and plastic plates are melted into a material that is easily processed. now the research team have made a lightweight 18 carat gold using a matrix of plastic.
This is how the researchers produced new bright gold: First, they added material to the water and created dispersion. After adding salt to convert the dispersion into a gel, replace the water it contains with alcohol. They then place the alcohol gel in a pressure chamber where the high pressure and supercritical atmosphere of CO2 allows alcohol and CO2 gas to be mixed. When the pressure is released, everything turns into a homogeneous and thin airgel.
The heat can then be used to anneal the plastic polymer, changing the material and compacting it to the desired shape while maintaining the 18 carat composition.
Researchers can even adjust the hardness of the material by changing the composition of gold. You can also replace the latex in the nozzle with other plastics such as polypropylene. When polypropylene melts at a certain temperature, the “gold plastic” it produces can mimic the gold melting process, but at a much lower temperature.
In addition, the shape of gold nanoparticles can change the color of the material: nanoplates create a distinctive gold luster, whereas round gold nanoparticles give a purple hue material.
As a rule, with this approach we can produce almost all types of gold that we choose based on the properties we want. Mezzenga points out that plastic gold is needed for the manufacture of watches and jewelry, but is also suitable for chemical catalysis, electronics, or radiation protection. Researchers have registered patents for processes and materials.