Pyrographene is expected to replace 13 rare metals

2022-07-27
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Graphene is expected to replace 13 rare metals

internationally, conflicts developed due to rare metals occur from time to time. Researchers at Chalmers University of technology have found that graphene can effectively replace a variety of rare metals, which will help to alleviate rare gold conflicts

rare metals can be found in computers, almost all electronic equipment and many plastic products around us. Society is highly dependent on rare metals, but this dependence has many disadvantages

although rare metals exist in various daily necessities around us, the extraction of rare metal elements is complex, difficult to recover and very rare, so they can easily evolve into "conflict ores", causing conflicts and squeezing among countries. The latest research from Chalmers University of technology shows that, technically, carbon nano materials can be used to replace many metal materials, such as graphene

rare metals, such as tin, silver, tungsten and indium, are rare and difficult to extract due to the low feasibility of extraction, which makes rare metals receive high attention. In addition, these rare metals have also triggered many conflicts. For example, in the Democratic Republic of the Congo, rare metals have become a source of funding for armed conflicts

in addition, the rare metal content in devices such as electronic products is usually very small, so it is difficult to be recycled

researchers Rickard arvidsson and BJ RN sand é n of the environmental systems analysis center at Chalmers University of technology have found a solution: replacing rare metals with carbon nanomaterials. The most famous of these materials is graphene, because it has the same good conductivity as rare metals

"the development of technology now enables us to make better use of carbon." Sand é n said, "nowadays, many new carbon nano materials have properties similar to metals, which is a very promising field. It is very important to invest in the recovery and replacement of rare metals from now on. This project will strongly promote Daxie to build the largest and most competitive MDI and HDI manufacturing center in the world."

the researchers of Chalmers University of technology have studied the main applications of 14 different metals, and studied the possibility of carbon nano materials as substitutes by consulting the professional computer automatic control operation and scientific and technological literature. This research result provides a very important reference value for the research and technical development in this field

according to the overview of arvidsson and sand é n, the transition from the use of rare metals to the use of carbon nanomaterials is under way

"among the most common applications of carbon nano materials, 13 of the 14 metals can be replaced by carbon nano materials. Technological development is at different stages, and different metals have different applications. For example, indium and gallium. The research results show that these two metals are very promising in some cases." Arvidsson said

"this gives us hope." Sand é n said, "in the debate on resource constraints, circular economy and social material handling, people have been paying attention to recycling and reuse. Substitution is happening quietly, but people do not pay much attention to this aspect. As the resource problem becomes more urgent, we now have more tools to use."

the results of this study were recently published in the journal cleaner production. Arvidsson and sand é n emphasize that reducing the use of rare metals has great benefits, and they hope to carry out more research and development in this field

"imagine if you could replace rare metals with carbon materials." Said sand é n. "Then the carbon extracted from biomass will create a new natural cycle."

"since carbon is a common and readily available raw material, it may also reduce these conflicts and geopolitical problems caused by rare metals," arvidsson said

at the same time, they pointed out that if rare metals are replaced with other materials, people still need to carry out more research to solve new problems that may arise in the future

"carbon nano materials are only a relatively new discovery so far. From the perspective of life cycle, the knowledge learned so far has limited understanding of the environmental impact of these materials, but it seems that the potential impact on the environment is very small." Arvidsson said

carbon nano materials are all or mostly composed of carbon elements and have good conductivity. Several rare metals have similar properties, such as rare metals in cables, thin screens, flame retardants, corrosion resistant containers and capacitors

rickard arvidsson and BJ Bu rose to a fixed position RN sand é n at Chalmers University of technology to investigate whether nano carbon materials graphene, fullerene and carbon nanotubes can be used to replace 14 kinds of rare metals in their main application fields. They found a potential technical solution to replace metals with carbon nano materials. Of course, in addition to gold in jewelry, the most likely replacement metals are indium, gallium, beryllium and silver

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