A tool pouch is a small bag or pouch designed for carrying and storing hand tools. It is typically made of durable materials like canvas, leather, or nylon and may have multiple pockets or compartments for organizing different types of tools.
Tool pouches are commonly used by professionals such as carpenters, electricians, and plumbers who need quick and easy access to their tools while working. They are also useful for DIY enthusiasts and homeowners who need to keep their tools organized and easily accessible.
There are many different types of tool pouches available, ranging from basic pouches with a few pockets to more advanced models with specialized pockets for specific tools. Some tool pouches can be attached to a tool belt for hands-free carrying, while others are designed to be carried on their own using a shoulder strap or handle.
Overall, a tool pouch is a convenient and practical accessory for anyone who regularly uses hand tools and wants to keep them organized and accessible.
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The MIT website published an article on July 3, saying that researchers at the school have developed a new method of seawater desalination with graphene. The method is simple and effective, and the cost is far lower than other existing technologies, which makes people have another choice in seawater desalination. Related papers in the latest issue of Nano Express. In many parts of the world, the supply of fresh water is declining, and as the population grows, this problem will continue to be severe. Therefore, many people have turned their eyes to almost unlimited supply of seawater, and various desalination technologies have emerged. However, so far, they are too expensive to be promoted on a large scale and at low cost. Jeffrey Grossman, an associate professor at the Massachusetts Institute of Technology's School of Materials Science and Engineering who led the project, said that many people are paying attention to desalination technology and have made many achievements, but it is not from the perspective of materials science that desalination is not a lot of. In the new study, Grossman and graduate student David Cohen Danucci changed the properties of the edge of the graphene pores by precisely controlling the pore size of the porous graphene and adding other materials to it, so that it can repel or attract water molecules. . Such a special graphene can quickly filter out the salt in seawater like a sieve, leaving only water molecules. The key to the new process is the very precise control of the size of the graphene pores. The researchers said that the optimal size is 1 nanometer. It should not be too big or too small. If it is too large, the salt will pass through the sieve together with the water molecules, and it will not be filtered. If it is too small, it will not pass. Small hole. Computer simulations show that the graphene sieve has excellent performance and can quickly complete the desalination process. Cohen Danucci said that a number of research groups have developed similar graphene screens, but they differ greatly in size and use. For example, porous graphene is used to filter DNA (deoxyribonucleic acid) or to separate different types of gases and the like. However, in these studies, the accuracy of graphene pores is relatively low, and the technique is relatively simple and cannot be applied to seawater desalination. At present, the most commonly used seawater desalination is reverse osmosis technology. It works by using a special membrane to filter the salt in the sea water. However, since the pores on these membranes are extremely dense (1000 times denser than the porous graphene used in the new technology), very large pressure is required to force seawater through the membrane, so that it consumes a lot of energy while desalinating seawater. . In contrast, under the same pressure, the new technology can be hundreds of times faster than the reverse osmosis membrane technology, or it can save more energy at the same filtration speed. Researchers say they are currently performing a final simulation and debugging of the entire process through a computer to determine their optimal parameters. The first prototype of the graphene filter using this technology will be available this summer. Grossman said that because the raw materials of graphene are cheap and easy to obtain, this technology has a natural advantage in cost. In addition, it is the hardest material known and is more durable than the reverse osmosis membranes currently in use. Joshua Schnell, an associate professor of chemistry at Harvard University, said that some people have previously developed a similar porous graphene structure, but no one has combined it with seawater desalination. New technologies offer an alternative new approach to seawater desalination.