亿电竞

strategy Emerging industries
"Environmentally friendly" graphene made from eucalyptus bark extract can reduce the亿电竞 production cost to 1 / 200 of the亿电竞 current production cost
Time: 2019/6/27 10:45:33

China亿电竞平台 Powder Net News Graphene is considered to have great potential due to its high strength, ultra-thin and excellent electrical and the亿电竞rmal conductivity. All of this lacks a cost-effective way to make it. However, a group of researchers now think the亿电竞y may have found the亿电竞 key to this hidden in the亿电竞 bark of Australian eucalyptus trees.


One of the亿电竞 more promising means of producing graphene sheets on a meaningful scale involves the亿电竞 chemical reduction of graphene oxides. But the亿电竞 chemicals used for this chemical reduction are usually toxic and pose a threat to people and the亿电竞 environment, leading scientists at the亿电竞 centre for advanced materials at the亿电竞 Royal Melbourne Polytechnic University to look for more pleasant alternatives.


"In general, eucalyptus leaves contain oils that produce aromatic compounds that give us a unique flavor," lead researcher Suresh Bhargava explained to new atlas. "The亿电竞平台se compounds help protect trees from pests. The亿电竞平台refore, we have considered using the亿电竞se aromatic compounds in bark extracts as reducing agents for graphene synthe亿电竞sis. "


Bhargava said that the亿电竞 key to this more environmentally friendly chemical reduction method is 29 polyphenol compounds, including catechins, which are rich in dark chocolate and green tea, as well as gallic acid and caffeic acid, which are found in red wine. The亿电竞平台se compounds work togethe亿电竞r in aqueous solutions to produce the亿电竞 required chemical reactions, providing the亿电竞 team with an "environmentally friendly" form of graphene that makes production safer, cheaper and more sustainable.


"Bhargava has never been found to be an overall safe method for the亿电竞 synthe亿电竞sis of eucalyptus bark," Bhargava said. "Our approach can reduce the亿电竞 cost of graphene from about $100 per gram today to 50 cents. This will increase its availability in various industries around the亿电竞 world and facilitate the亿电竞 development of a range of important new technologies. "


The亿电竞平台 team tested its environmentally friendly graphene as a supercapacitor and found that it performed as well as graphene produced by traditional methods. The亿电竞平台 researchers will also try to fine tune the亿电竞ir approach to make it more efficient and the亿电竞n focus on commercial applications.


"In our environmental chemistry approach, we use eucalyptus bark extract, which contains about 29 polyphenol compounds responsible for reducing graphene," Bhargava said. "Our next step is to find out the亿电竞 selective reduction of graphene oxide from the亿电竞se 29 polyphenol compounds. If we find selectivity, the亿电竞 separation of the亿电竞se compounds and the亿电竞 furthe亿电竞r production of graphene in a cleaner way can be improved. Once we get efficiency improvements, we will try to integrate our laboratory scale into a pilot scale and the亿电竞n to an industrial scale. "


 
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