"What can China export to the world in terms of original technology? I think liquid metal can be counted as one." In late December, at a forum, Liu Jingru, a researcher at the Institute of Physics and Chemistry of the Chinese Academy of Sciences and a professor at Tsinghua University, said.
Liu Jing's liquid metal refers to a metal that is liquid like water at normal temperature and pressure. For ordinary people, in addition to mercury, liquid metal is rarely seen.
Image from the web
In March last year, domestic and foreign media published a message: Liu Jing team discovered for the first time in the world that gallium-based liquid alloys can be converted between various forms after a small amount of "food" (aluminum). Fast forward. The latest developments in this basic science field are as fascinating as "illusion." Liquid metal has entered the public eye.
At the forum, Liu Jing explained the status and prospects of China's liquid metal development in the world under the title of “Liquid Metal: The Rise of a New Industryâ€.
Liu Jing introduced that he and his team have developed a series of original technologies that are widely influential in the world, such as the world's first liquid metal electronic stylus, which can draw circuits directly; with the world's first liquid metal electronic circuit printer, just in the computer By drawing a circuit diagram, you can print it directly; the first room temperature 3D metal printer can realize more complicated functional devices. The circuit boards that people usually use need to go through complicated and expensive etching processes, that is, to reduce the material manufacturing route to obtain the lines, which consumes time and consumables and causes pollution.
NASA in the United States listed liquid metal cooling as one of the top ten frontiers in 2014. In the past ten years, Liu Jing team has systematically studied the excellent heat transfer performance and flow characteristics of liquid metal. The first series of liquid metal radiators have been used in many fields. The most exciting thing is that in addition to the radiator, other technologies such as electronic stylus, electronic circuit printer, 3D printing equipment, etc. have also entered the industrial manufacturing process.
On the forum, Liu Jing also explained to the participants the magic of more liquid metal: the “printing†circuit on soft plastic can make a flexible circuit board that can bend and stretch, and quickly make LED electronic display with stylus on the skin, The writing circuit on the leaves is used for heat dissipation of high-power, high-integration LED chips .
What is the significance of printing liquid metal on leaves and skin? Liu Jing said that this represents the universality of liquid metal printing, which can be used to manufacture electronic circuits on various surfaces; and skin printing, such as printing medical circuits and sensors on the patient's head in special cases, can be passed The mobile phone keeps abreast of the physiological changes in the brain.
3D printing is fashionable today, but it is mostly concentrated on plastics, polymers and other materials. Liu Jing team developed a liquid metal room temperature 3D printing device for this purpose, proposed and realized liquid phase fast printing metal, and mixed 3D printing of non-metal materials and metal materials, which is a pioneering work in the world. Liu Jing believes that "this will give birth to the ultimate hybrid manufacturing technology for functional devices."
At the forum, Liu Jing also introduced the team's breakthrough work in biomedical fields, such as liquid metal high-resolution CT imaging, occlusion vascular tumor treatment technology, and injection electron, liquid-solid conversion metal skeleton. In particular, for the worldwide problem of fracture nerve repair, Liu Jing's team used liquid metal “bridge†to successfully achieve neural connection. This pioneering work has been reported by many international media.
"The history of the development of human civilization has inspired us: a class of materials, an era." Liu Jing said that China is fortunate to be at the forefront of the world in the field of liquid metals. We hope to grasp this major historical opportunity to build a world-class liquid state in China. Metal valley.
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