What do cleaners, car cleaners, passports, bank statements, vacuum cleaners, and oysters have in common? The color is created through a specific microscopic association of the maker of the object, often called “iridescent” or “holographic,” which corresponds to the red pattern with the rainbow. Chemical engineer Jeroen Sol explored how water crystals could be used as a natural ink to produce red coatings.
3D printing has received a lot of appeal in the last two years. The technologies that fall under this name have been used to make face masks, high -speed racing bikes, and to explore the use of personalized medical procedures. Fear not: if it can be imagined, it can be printed – except for the red ones. A quick look at the 3D printing press will show the printers all the colors of the rainbow, but you’ll be looking for the glitter of an apple, and your search will be in vain.
The shiny look
In his doctoral article Jeroen Sol explains how “water cells” are used to fill this gap. Water crystals are commonly used in computer screens and movies, but can be expanded after some chemical changes. Water crystals of the “cholesteric” type show a lot of colors as an example in the beginning, but are very liquid.
Initially, Sol showed that the films of such cholesteric water crystals could be broken up using ultrasonication, which converts large films into tiny, sub-millimeter flakes. Combining these flakes into a shiny 3D printed plastic will result in a filament with a shiny appearance. Items printed with this material are also displayed in this beautiful color.
The next step – well -designed, 3D printers – requires a rethinking of the printing process, and ultimately, the feedstock ink. For this unique process, “precise ink writing,” Sol chemically modified a cholesteric liquid glass that found the balance between honey and pure bean butter.
The materials printed with this ink are presented in a bright color that changes depending on the point of view. In addition, not only is the nature of these factors decided during the preparation of the ink, but the printing arrangements play a big role. “Before it becomes a disaster, this offers opportunities: a single inch can be used for a variety of purposes,” says Sol.
This ink is a starting point for “4D printing” of iridescent materials. By re -modifying Sols colored cholesterol liquid crystal ink, this “four four” will show how the color changes in response to water. Encouraged by the natural world – like snails – the objects show significant color changes in response to low -grade changes in the atmosphere.
When printed on its own, cholesteric ink can be used for products that have been modified in a pre -arranged manner to respond to moisture. Stirred by the scallops, a display is shown that fills the strong air, and opens the dry air.
Sol: “If this article shows anything, it should be that, while the future of 3D printing is considered to be very shiny now, the colored water crystals printed here will be even better. the light. ”
A new water glass ink for 3D printing
Cholesteric water crystals in synthesis: pure.tue.nl/ws/portalfiles/por…/20220330_Sol_hf.pdf
Presented by Eindhoven University of Technology
Directions: Red 3D printing using water crystals (2022, April 1) retrieved 2 April 2022 from https://phys.org/news/2022-04-lustrous-colored-3d-liquid- crystals.html
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