Release date: 2018-04-03
The US Department of Energy's Lawrence Berkeley National Laboratory scientists have developed a new chemical method that controls another liquid in a liquid to form a tubular structure. This method of printing a three-dimensional structure using all-liquid materials can be used to print liquid electronic devices to power flexible stretchable devices. The relevant report was published in the latest issue of Advanced Materials.
The researchers dispersed the gold nanoparticles into water and dispersed the polymer ligands into the silicone oil, then injected the threaded water into the silicone oil using a modified 3D printer - making one liquid threaded in the other. Engraving structure. Soon after water is injected into the silicone oil, many of the ligands in the silicone oil adhere to the gold nanoparticles in the water, forming a nanoparticle ultrafiltration membrane at the boundary of the tubular water column, which prevents the water pipe from breaking into droplets, stabilizes the water-oil interface, and locks the water in proper position.
According to Tom Russell, a scientist in the laboratory's materials science department, this stability can stretch water into a water pipe or turn water into an ellipsoid. They have printed water lines between 10 microns and 1 mm in diameter and made them of various spiral and branch shapes up to several meters. Moreover, these materials can change shape repeatedly in accordance with the surrounding environment.
Russell said: "This is a new type of material that can be redesigned and can be customized into liquid reaction vessels for chemical synthesis, ion transport, catalysis, etc."
To automate this new liquid printing process, researchers installed a syringe pump and liquid extrusion needle on a ready-made 3D printer. The 3D printer is specially programmed to insert a needle into an oil-based solvent to inject water into a 3D model.
Source: Technology Daily
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