The hottest mixture of MOF and plastic can be used

2022-08-08
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The mixture of MOF and plastic can be used to manufacture low-cost sensors and fuel cells

a new study by the National Institute of standards and Technology (NIST) shows that 3D printing plastic can be used to manufacture low-cost sensors and fuel cells when combined with a multifunctional material for detecting and storing gases

this multifunctional material is a metal organic framework compound (MOF); These materials are simple to make and low-cost. Some of them can also be used to capture a special gas from the air. From a microscopic point of view, these metal organic frames look like buildings under construction - the spatial structure of steel beam frames in your imagination. A special property of MOF is that it can allow the fluid to flow in its space, and its beams and columns will absorb specific parts of the liquid and grasp these specific parts when the remaining liquid flows away. This material is a potential candidate for oil refining and refining of other hydrocarbons

metal organic framework compounds have attracted the attention of scientists from NIST and American universities, because this material can also lay the foundation for low-cost sensing technology. For example, some MOFs can be used to filter greenhouse gases such as methane or carbon dioxide. However, the problem is that the newly manufactured rigid polyurethane foam gb10800 (8) 9fs for thermal insulation of Mo buildings is a non fragile part with a volume different from that of dust. 2: small particles with many sizes of boards and cards. And it's very difficult for you to use these materials that can even slip away from your fingers to make a useful sensor

in order to solve this problem, the team decided to try the error caused by friction resistance. The friction resistance of the host part mixed MOFs with the plastic used in 3D printers. The synthetic plastic material can not only be shaped into the shape the team wants, but also has enough permeability to let the gas pass through it, that is, MOFs can detect the specific gas molecules the team wants to detect. But will MOFs work after mixing

in a paper on advanced technology polymers, researchers said that this idea can be used not only in sensors, but also in other aspects. They proved that MOFs and plastics can be well combined; For example, when this mixture melts, MOFs will not precipitate to the bottom of the plastic, but will be evenly distributed in the mixture

Zeeshan Ahmed, a sensor expert at NIST, said, "the automotive industry has been looking for a cheap and light-weight way to store the fuel of hydrogen powered vehicles. We hope that this mixture of MOFs and plastic can become the basis of the fuel tank of hydrogen powered vehicles."

the paper also shows that when the solid mixture and plastic are exposed to hydrogen at the same time, it retains more than 50 times more hydrogen than the plastic itself, which shows that MOFs can still play an effective role even when mixed with plastic and adjusted by inserting small iron sheets at the bottom of the main body. These are gratifying results, but they still cannot meet the requirements of fuel cells

Ahmed said that his team members are optimistic that this idea can be improved and become a reality. They have conducted a preliminary study in the second forthcoming paper, which discusses the effects of the other two MOFs on the absorption of nitrogen and hydrogen, and also shows how to reduce the impact of humidity degradation on this mixture of MOFs and plastics. Currently, the team is seeking opportunities to work with other NIST research groups to jointly develop MOF based sensors

zeeshan Ahmed, a scientist from NIST, said, "our goal is to find a storage method that can store 4.5% hydrogen, and now our storage capacity is less than 1%. But from the perspective of materials, we don't need to make significant improvements to achieve this goal. So we see that glass or plastic can be half full."

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