According to foreign media Telegraph, a few days ago, British scientists used silver and graphene as raw materials to invent a cheap flexible touch screen.
Currently, touch screens that are common on the market are very fragile because they are usually made of indium tin oxide and covered with a layer of glass so that when it falls to the ground, it is easily crushed.
This indium tin oxide is not only fragile, but its preparation is still difficult, which makes the cost of repairing the touch screen always high.
However, scientists at the University of Sussex in the United Kingdom recently discovered that we can combine graphene, a substance composed of a single layer of carbon atoms, with silver nanowires to create a A screen with similar performance to a conventional display, and the cost of this manufacturing technique is only a fraction of the cost of conventional display manufacturing.
The material is also very flexible at the same time, so it does not require a glass protective layer, which means that the top layer of the touch screen can be replaced with some more flexible materials that are less likely to be broken, such as plexiglass.
Dr Matthew Large, who led the research at the School of Mathematics and Physical Sciences at the University of Sussex, said: "The reason why the touch screen on your phone is so easily broken is mainly because of the touch sensor. The transparent conductive material is indium tin oxide. This material is very fragile, so it requires a hard surface like glass to protect it."
“If your phone drops on a hard surface, or if you accidentally sit on your phone, the broken thing is actually the glass layer. The latest material we developed does not require a hard glass surface. Because the screen made of a mixture of silver nanowires and graphene is very flexible."
"We will still need a protective layer, but it can be something more flexible outside of the glass. This way, when you accidentally drop your smartphone to the ground, your phone's screen will not be so fragile. ."
Although silver is also a rare metal, the difference in metallic indium is that graphene can be mixed with a small amount of silver to cover the same area. The amount of graphite required to prepare graphene is very rich, so the cost of preparing such a screen can be drastically reduced.
Scientists have discovered that they can float graphene atoms on the surface of the water, pick them up with special tools, and place them on top of the silver nanowire film in any way to complete the material preparation.
Professor Alan Dalton of the School of Mathematics and Physical Sciences at the University of Sussex said: "By using sprayers and roller presses, we can easily silver on a large scale in this way. Nanowires and graphene are combined. This means that fragile mobile phone screens will soon be a thing of the past."
“The addition of graphene to silver nanowires also increases the conductivity of the screen material by a factor of almost 10,000 times.â€
“This means that we can produce the same level or better performance screen with a small dose of silver. Screens made with this material can respond faster and consume less power.â€
Dr. Rach finally added: "This paves the way for us to develop equipment that can be bent at will." This research has been published in the American Chemical Society magazine "Langmuir". (Source: China Industrial Network)
Why say closed cooling tower is energy saving and environmental protection equipment, more and more users are using this kind of equipment to replace the original equipment (open tower), we can through data analysis and comparison, the two energy data accounting can be obvious. Energy consumption is basically two major aspects, one is water, the other is electricity. Both are energy costs that no cooling tower can escape, unless you leave the equipment on.
First of all, look at the consumption of water. Water is generally consumed in two aspects. One is the flying overflow after spraying, and the other is the evaporation consumption of water.
Let's look at the open cooling tower, the spray water of the tower is basically between two and three percent of the overflow rate, if we according to the daily operation of 10 hours, excluding holidays, 280 days of operation. According to the actual open cooling tower flow of 6000 cubic meters per hour to calculate. 6000*2%*10*280= 336,000 tons of water, and the same closed cooling tower, its spray flying overflow is very small, because after all, the spray work is carried out in the tower, almost can be controlled in a few thousandths, we calculate according to 5 thousandths, the same is 10 hours of work, 280 days a year operation, To achieve the same cooling amplitude is basically 4,500 tons per hour of closed cooling tower is enough, then the calculation results: 4,500 *0.5%*10*280= 63,000 tons, it is not difficult to see, because of the different design structure caused by the waste of spraying water resources, more than 200,000 tons of terror. The bigger the pool of the open tower, the more wasted water, because the evaporation area increases, and the closed cooling tower has no pool, so the consumption here is zero. Judging from the price of a ton of water, just such a equipment, a year to solve the capital of hundreds of thousands of enterprises.
Let's look at the comparison of electric energy, electric energy is not different, because they are all through the same power equipment to operate the equipment, the power of the two is similar, the running time is the same, basically the energy consumption is about the same.
To sum up, for the closed cooling tower energy saving accounting can be strong to open the tower out, and, today are advocating energy conservation and environmental protection, this is the general trend, so the closed cooling tower is more and more favored by the majority of users.
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