“IQ tax” products everywhere in life are often all kinds of fools under the banner of science.
Recently, Tai Ge and his friends around him tinkered with niche engine oil, intending to change their car with a “ration” that often worked. I accidentally saw a “high-tech” product, there is a “graphene lubricating oil” claimed to have a very excellent lubrication and anti-wear effect, but also can increase the engine cylinder sealing effect to save fuel and increase power.
Looking at the price, the lubricating oil from an unknown small factory actually dares to sell for more than 100 yuan a liter!
Open it to see the introduction is that “black technology” is too powerful, but out of professional habits, Tai Ge found a friend who worked for the four major doses to chat, and then the nameless fire in his heart came up!
Today, Tai Ge will come to talk to you about the true face of this “high-tech” lubricating oil Lushan.
Graphene is just a single atomic sheet of graphite
There are only 3 characteristics: high conductivity, anti-wear, and high light transmission
The material graphene, since the Nobel Prize in Physics was announced 12 years ago, has become a piece of fragrant food.
So there are a variety of products with “graphene” as raw materials on the market, what graphene underwear, graphene batteries, graphene power bank, graphene storm jacket, graphene mask, graphene antibacterial underwear, graphene stockings, anyway, you can think of basically can catch the edge!
But what exactly is graphene? What are the characteristics?
This starts with what graphene is!
First of all, the name graphene (Graphene) is actually a relatively general concept, referring to a single carbon atom composed of a single layer of sheet structure of a class of substances, simply put, a carbon cloth only a single carbon atom thickness, can be called graphene.
And graphite with one less “ene” word is also composed of carbon element, and his structure can be understood as Master Kong’s 3+2 layer by layer soda biscuits, but the place to engage in brains is here!
Only a single-layer atomic structure can be called “graphene”, and 10 layers and 8 layers are actually graphite, not graphene.
Therefore, we can roughly understand that graphene is graphite with a single atomic thickness, and the separation product of graphite only has a certain degree of performance:
Why? It’s because it’s so thin!
1. Excellent electrical and thermal conductivity
Everyone knows that graphite itself is a conductor with excellent performance, and the conduction is smoother after reducing the layering effect of graphite itself. Of course, by the same token, thermal conductivity is also very good. The combination of these two characteristics makes it more suitable as an additive for thermal clothing.
2. Slippery, unstable structure, low strength.
The resistance between the sheet structures is very small, and relative sliding is prone to occur. Everyone knows that the lead of a pencil is to adjust the color depth, soft and hard smoothness by adjusting the proportion relationship between graphite and clay. The role of graphite powder is to use as a lubricant.
3. High light transmittance
There is no need to talk about this thing, Tai Ge said earlier that the thickness of graphene is only the thickness of a carbon atom, and graphene is a two-dimensional product, so the plane of the single atomic layer of course has light transmission, and this thing is almost transparent.
From the above three characteristics, graphene seems to be a good choice in lubricating oil, itself is very thin at the atomic level, and graphite itself has the effect of lubrication and wear-resistance, and thermal conductivity and conductivity, how to look at it can be used on oil.
But Tiger makes it clear that these properties do not apply to motor oil.
Graphene is neither soluble in water nor in oil
As an oil additive, it will increase carbon deposits
It is well known that the much-hyped “graphene” is used as an engine oil additive.
The distribution of few-layer/single-layer graphene powder in the oil can improve the lubrication effect, which most university research laboratories have definitely concluded.
However, in fact, in the ranks of industrial consumer goods, graphene is used in lubricating oil additives is particularly rare!
Why? The reason is particularly simple, carbon element chemical stability is very high, so this thing is insoluble in water and insoluble in oil, after mixing graphene additives into the oil, you can see the graphene powder settle to the bottom of the bottle after standing still for 2~3 days. What does this mean?
If your car uses this and you don’t come home for a week on a business trip… Europe! You spent a lot of money on “graphene” precipitated feed!
Even ultra-thin nanomaterials such as graphene have no solution.
And graphene escapes its final fate “reunion” whether in solvents or in air, that is, graphene will always agglomerate into graphite spheres (fullerene to understand). So you add graphene lubricating oil to the car engine, and under high temperature operation, graphene slowly agglomerates into graphite particles…
People’s engine oil manufacturers have made great efforts to reduce the amount of residual carbon in lubricating oil, in order to reduce engine sludge and coking, and use metal salt anti-wear additives that are more expensive than graphite. And a large number of so-called “high-tech” lubricant manufacturers use so-called “graphene” instead of metal anti-wear agents, this is not their own life, isn’t it~
It seems that “manufacturer certification” is the most reliable
To buy engine oil, there is actually only one principle: look at the manufacturer’s certification.
In fact, many car owners have the same problem more or less when buying engine oil, that is, whether the oil they want to buy is suitable for their car. But I don’t know if the oil I bought is suitable for my car, in fact, the oil bottle is all written!
Take the following Elf oil, which is ACEA C5 20 viscosity low-ash oil on the surface, and its yellow box in small print is very clear: Ford’s MC2952-A1 certification, and BMW’s LL-17FE+ certification.
Then we open Lubrizol’s official website to see the “Oil Universal Radar Chart Tool”.
It can be seen that the requirements of BMW’s LL-17FE+ grade in almost any indicator of engine oil are significantly higher than ACEA’s C5 level. Therefore, oils that meet BMW’s LL-17FE+ grade must meet ACEA’s C5 rating (higher than C5 certification alone).
(Legend: C5 in blue, BMW LL-17FE+ in gray)
Next, please open the car manual of the snow hidden in the glove box, find the engine oil to compare, as long as the cognitive level written in the manual is consistent with the barrel, then you have found a very suitable lubricant.
The truth is as simple as that~
Two final words:
Life is cloaked in high-tech publicity endlessly, for many car owners do not have time to know so much ingredient physical and chemical information, can only rely on marketing to buy goods. When purchasing goods, Taigo is more inclined to study test data and theoretical arguments, after all, all chemical industry products cannot escape data detection.
And not all sorts of so-called “black technologies” that blow to the sky and do not understand …