Nature published!The Xiamen University team used the "liquid door" to purify the air and make a new breakthrough!

Author:Xiamen Daily Time:2022.09.27

Hou Xu's team designed "Response Line Gate Control" concept diagram. (Photo confession in the respondent)

The "liquid door" in science fiction films is now used by Chinese scientists on air purification -Professor Hou Xu team of Xiamen University uses "liquid door control technology" for the first time to open up the existing technical pain points of air purification Bacteria and particulate matter are perfectly adsorbed, providing a new idea for the design of the air purifier.

This result was published in the world's top scientific magazine "Nature", which was launched at 23:00 on the 26th. Zhang Yunmao, a doctoral student at the School of Chemistry and Chemical Engineering of Xiamen University, is the first author of the dissertation. The author is Hou Xu, a dual -hired professor of the School of Chemistry and Chemical Engineering, the School of Chemical Science and Technology of the Xiamen University, and the papers are supported by the Zangdu Ocean Team of the Northwestern University of Technology.

Air pollution is increasingly threatened to human threats, and the air filtering and purification system is more important than any time. It is mostly composed of a filter membrane unit composed of multi -layer fiber membranes or porous materials. However, it has a fatal point: the "door" of the air purification system is solid material. When small material passes through, the "fat man" in them often gets stuck and let them enter and exit. Membrane materials are contaminated or blocked.

Hou Xu's team used "liquid door control technology" to solve the pain point of the air purifier. Hou Xu, 39, is the inventor of "liquid door control technology". He is known as a scientist of "playing with water".

In the science fiction movie "The Gate of the Star", humans use liquid star gates to realize the instantaneous transmission of material in the universe. But can liquid really do the door?

Hou Xu said that it does not work at the macro scale, but the micro -world can obtain the liquid door, and the liquid door is closed.

However, the use of "liquid door control" to air purification technology faces many challenges. The results of Hou Xu's team have achieved important breakthroughs in these aspects. Hou Xu said that this is a scientific research of "native".

Hou Xu said that the basic research work of the air purification application is another improvement of liquid door control -its core breakthrough is to solve the flowing liquid as structure and functional materials ) High -efficiency texture problems, and due to the replacement of liquid doors, the order of order of pollutant treatment is improved, thereby improving the purification efficiency while increasing the dust capacity of the purifier.

Hou Xu believes that the laboratory has a good technical reserve of liquid door control of air purification system, waiting for the industry to reach out to "pick up".

【Interpretation】

Where is the current air purification system is not perfect?

The significance of the research results of the Hou Xu team should start with air pollution.

Human beings are increasingly facing pollution challenges. The continuous haze weather has caused explosive growth of patients with respiratory diseases, and also cause economic and social problems. Among them, particulate matter concentration is an important indicator of air pollution.

At present, the most effective way to remove these particles is the air filtration and purification system. It is mostly composed of a filter membrane unit composed of multi -layer fiber membrane or porous materials. However, due to the accumulation of particles on its surface and internal pores, these filter units will inevitably suffer from blocking problems. The surface of the surface of the surface is fundamentally limited to the efficiency and service life of this type of filter device.

Hou Xu explained that the "door" of the air purification system is mostly solid materials. When the tiny substances pass through, they often get stuck in the "fat man" in them, so that they can't enter and exit. Over time, "fat people" accumulate like mountains, filtering The membrane material is contaminated or blocked, which is also the pollution problem that we often encounter in water treatment and seawater.

Therefore, the task faced by scientists is: how to develop a purification system with high efficiency, long service life, and no need to maintain complex maintenance to solve the pain points of traditional industries.

Can the liquid really make a door?

The latest paper published by Hou Xu's team shows that they use "liquid door control technology" to solve the pain points of the air purifier. There is a background here: 39 -year -old Hou Xu is the inventor of "liquid door control technology", and he is known as "playing water" scientists.

In the science fiction movie "The Gate of the Star", humans use liquid star gates to realize the instantaneous transmission of material in the universe. But can liquid really do the door?

Hou Xu said that at the macro scale, the liquid continued to flow due to the impact of gravity and centrifugal power, and it was indeed unable to fix. However, in the micro -world, the door frame is formed by designing a porous structure on some solid brackets, and the liquid can be stable in the micropores with capillary to obtain the liquid door. Moreover, under the gradient of stress, it can realize the function of reversible switch -equivalent to stress is a key. Under the appropriate key (pressure), the liquid door can be opened and off. When the liquid door is closed, even the gas molecules cannot pass, but under a specific pressure, the material can pass smoothly when the liquid door is opened.

In the vernacular words, the liquid door proposed by Hou Xu, because the surface of the liquid has a smooth molecular level, and the entire surface has no gaps and defects. Therefore, when the liquid door is closed, the city cannot be rushed out, and the ones outside the city cannot be killed. When opening the door, it is unimpeded without leaving residue. And the "liquid door" is sensitive to pressure, high sensitivity, and the switch is quickly and free.

Where is the results of the Hou Xu team "new"?

The liquid door is so fragrant, but the use of "liquid door control" to air purification technology is facing many challenges. For example, how to design solid materials and door control liquids with controllable solid solid liquid interfaces, as well as door control liquid and pollution air. There are functional liquid air interfaces above, how to achieve the stability and controllability of the response liquid door system, how to produce uniform micro -bubbles, and how to control the high -efficiency texture problem on the micro -bubble three -phase interface. The research of Hou Xu's team has achieved a series of important breakthroughs in these aspects.

Hou Xu said that the basic research work of air purification application is another improvement of liquid door control -its core is to use the surface moisturizing electrochemical porous film as a solid skeleton, and the system design door control liquid as the structure as a structure. With functional materials, use the physical chemical properties of the electrochemical regulation-liquid interface to achieve control of the size of the micro-bubble, and to control the interaction between the particles and the function liquid. Essence

In other words, this method breaks through the problem of efficient quality transmission of liquid as structure and functional materials -the effective surface area of the liquid goalkeeper traditional solid material to filter pollutants, and convert it into the effective volume of liquid materials for pollutants filtering and absorption. One of the benefits of doing so is that the order of order of pollutant treatment is improved, thereby improving the purification efficiency while increasing the dust capacity of the purifier.

In addition, the use of door control liquid as the main filtering material can further achieve maintenance, efficient and low -cost system operation through pipeline connection, automation, and programmatic control. It can be suitable for specific purification needs, such as antibacterial ability, the ability to remove odor and harmful gas pollutants, and corrosion resistance.

In other words, the air purification system can combine integrated applications such as artificial intelligence technology and micro -current control technology, which is expected to realize the rapid adjustment of multiple functional liquids to meet the needs of air purification in different environments in the future.

When can the air purification system at home use the liquid door?

So, how far is the scientific research results in laboratory?

Hou Xu believes that the laboratory has good technical reserves at present, waiting for the industry to reach out to "pick up".

According to reports, this research results can not only be used in air purification. This door control mechanism based on liquid -based materials for multi -phase interface material transmission behavior will also help promote the trace detection technology of substances such as viruses, bacteria, and bacteria, and bacteria, and bacteria. Drugs, heavy metal ions, etc. will promote the development and development of the development and catalytic, emulsified, pharmaceutical and other fields of miniature reactors. It has broad application prospects in environmental governance, energy -saving membrane materials, biomedical engineering, aerospace and other fields.

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