Is natural graphene floor heating harmful to people?

Graphene is a two-dimensional carbon nanomaterial composed of carbon atoms with sp hybrid orbitals, hexagonal and honeycomb lattice. Graphene has excellent optical, electrical, and mechanical properties, and has important application prospects in materials science, micro-nano processing, energy, biomedicine, and drug delivery, and is considered to be a revolutionary material in the future. Andrei Geim and Konstantin Novoselov, physicists from the University of Manchester in the United Kingdom, were jointly awarded the 2010 Nobel Prize in Physics for successfully separating graphene from graphite using micromechanical exfoliation.

The graphene underfloor heating concept was born mainly because of the material's high thermal conductivity. The thermal conductivity of pure, defect-free single-layer graphene is as high as 5300 W mK, which is the highest thermal conductivity of carbon materials to date, higher than that of single-walled carbon nanotubes (3500W mK) and multi-walled carbon nanotubes (3000W mK). When it is used as a carrier, the thermal conductivity can also reach 600W mk.

Because at the current level of technology, graphene is still only in the laboratory stage and small-scale experimental application, the so-called large-scale production and application is temporarily impossible to achieve, so looking back, the news of the Qingdao Graphene Conference that year, Andre Geim (Andre Geim) picked up the graphene physiotherapy waist that is said to be sold very well, must feel that his IQ was rubbed on the ground by the Chinese. So far, there is no technology that is really suitable for large-scale industrial production, and it is difficult to extract high-purity graphene by existing methods. There is no low-cost and high-quality graphene production process, the first large-scale graphene products?

Why are there so many graphene products? Heating, physiotherapy. This is related to the habit of some Chinese people to be novel, when there are too many competing products in a product, some companies like to rely on fresh hot words"Graphene"fire, so "graphene floor heating","Graphene physiotherapy device"And it came out.

Speculating on the concept is also a way to increase profit margins or increase the selling point of a product. Many so-called graphene floor heating, itself is the alienation of carbon fiber floor heating or graphite floor heating (electric heating film) alienation, of course, if you insist on graphene floor heating, it is not impossible, after all, graphene is also stripped from graphite, steamed buns put a little meat foam is also meat, you say not vegetable buns, not bean paste buns, is meat buns, it must be right. Society is constantly progressing and developing, and once the problem of low cost and high quality of graphene is solved, it is a matter of time before it is applied and promoted.

But if graphene products are promoted on a large scale, it is a bit too cross-sectional.

In addition, high-quality graphene powder is up to 2000 yuan g, and low-quality graphene powder is also 500 yuan g. So, if you spend 200-300 yuan to buy graphene floor heating in the real sense, you really earn it.

Ultimately, graphene underfloor heating is just a concept hype product!!

Graphene floor heating is not harmful to the human body, and there are many benefits!

There are three reasons why graphene floor heating is not promoted in the country: 1It's expensive; 2.has an effect on the human body; 3.The quality of graphene underfloor heating is uneven.

1.Expensive: Graphene materials are scarce, and merchants have expanded some of the advantages of graphene materials, so graphene floor heating is much more expensive than other floor heating.

2.Impact on the human body: When graphene floor heating is used for heating, the treated graphene molecules are in contact with human lung epithelial cells, which will cause cell death in the lungs and cause varying degrees of damage to liver and kidney function.

3.The quality of graphene floor heating is uneven: due to the high cost of graphene floor heating, many unscrupulous manufacturers obtain high profits through shoddy, fake and shoddy products. These products are very harmful to the human body. Therefore, the state has not vigorously promoted graphene floor heating.

In general, graphene floor heating is more reliable.

Graphene floor heating can be directly controlled by the controller. For example, each room can be controlled individually, so that when in use, the temperature of each room can be reasonably controlled. In fact, this is similar to traditional floor heating, so the temperature control of graphene floor heating is more accurate.

Because graphene floor heating uses electricity to achieve low-temperature operation, and it is buried under the ground, it will not be destroyed at ordinary times. The life span of graphene floor heating can reach more than 50 years under normal circumstances. In addition, the safety of use is relatively high, this kind of floor heating does not need to be flushed and rotten to heat, and there is no danger of leakage, so it is relatively safe to use.

Work process

The whole working process of graphene floor heating is actually the heating of the heating film. Graphene floor heating has a characteristic, which can be said to be rapid heating, so it is also called second heating. And there is no need to conduct heat through any medium.

During the heating process, a kind of far-infrared rays are emitted, which can directly heat the cement layer, and then conduct it to the tile or wood floor, and finally increase the indoor temperature in the form of radiant heating. For example, when the ground temperature of the cement layer is heated to 38 40, the time required is generally 15 to 30 minutes, so it heats up very quickly.

Under normal circumstances, floor heating is better, but there are installation restrictions, requiring that the floor is not laid before the installation of durable, and wall heating I think is a substitute for insufficient floor heating, which cannot be said to be bad, but it will occupy some wall space. Here's a look at the benefits and advantages of underfloor heating:

1.Compared with air conditioning heating, air conditioning heating is a heating method for heating air, indoor dry heat, peculiar smell, water loss, dry mouth, indoor dust, dirty air convection and other phenomena, using graphene electric heating film heating, radiation far infrared direct heating, far infrared and sunlight waves in the same belt, medically become the "light of life", so use it to heat as warm as the sun.

2.Compared with pipes: Pipes can not only keep warm, but also provide domestic hot water, which is incomparable to other heating methods.

However, repairs are required every year after pipes are prone to water pipe rupture, resulting in high maintenance costs. It brings a lot of inconvenience to life. After installing the graphene electric heating film, there is no need to clean, add or replace materials, and it will not cause any damage for more than 30 years.

3.Electric floor heating also has the following advantages: the temperature is concentrated in the main area of human activity below the meter, and the energy saving is more than 30; The conversion rate of electric heating film is high (more than 80), and the electricity consumption time is 1 4 of the use time, which is 25 of the energy consumption of air conditioning; Silent the whole heating process, no light, no pollution, worthy of the name of healthy, energy-saving, comfortable green products; No occupations: This area is conducive to interior beauty and decoration, increasing the actual effective space of the room; Each room is equipped with an independent intelligent thermostat to meet the requirements of energy saving.

The power conversion rate of the far-infrared electric heating film heating system reaches more than 80, and the electric energy is basically completely converted into thermal energy. Therefore, graphene electric heating film is more energy-efficient.

Yes. Graphene has very good thermal conductivity. The thermal conductivity of pure, defect-free single-layer graphene is as high as 5300 W mk, which is the highest thermal conductivity of carbon materials to date, and its thermal conductivity is higher than that of single-walled carbon nanotubes (3500W mK) and multi-walled carbon nanotubes (3000W mK).

When it is used as a carrier, the thermal conductivity can also reach 600W mk. In addition, the ballistic thermal conductivity of graphene can move the lower bound of the ballistic thermal conductivity of carbon nanotubes per unit circumference and length downward.

The structure of graphene is very stable and the carbon-carbon bond is only. The connection between the carbon atoms inside the graphene is very flexible, and when an external force is applied to the graphene, the carbon atom surface will bend and deform, so that the carbon atoms do not have to be rearranged to adapt to the external force, thus maintaining the stability of the structure. This stable lattice structure gives graphene excellent thermal conductivity.

In addition, when the electrons in graphene move in orbit, they are not scattered due to lattice defects or the introduction of foreign atoms.