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05/192025
Nano diamond and anti friction agent (1) - Li Yunpeng
Actually, I rarely get involved in the topic of 'nanomaterials'. Firstly, I have limited knowledge and skills, and the concept of nanomaterials is like clouds and mist that I have never been able to grasp; Secondly, nanomaterials are still an emerging interdisciplinary field that is rapidly developing.
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05/192025
Nanodiamonds and Anti Friction Agents (2) - Li Yunpeng
② The quantum size effect and ③ small size effect are more closely related to the sound, light, electricity, and magnetism of nanoparticles. For example, the threshold of the absorption spectrum of atoms in nanomaterials undergoes a blue shift, and the Fermi level transitions from continuous to separated, resulting in optical nonlinearity.
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05/192025
Nano diamond and anti friction agent (3) - Li Yunpeng
To have a correct understanding of the various assumptions about nanodiamonds and even other types of so-called nanolubricants, we may first take a look at how nanomaterials (particles) are prepared.
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05/192025
Nano diamond and anti friction agent (4) - Li Yunpeng
From various current theoretical models, nanodiamonds and other nanomaterials are theoretically a unique class of materials with unique properties. Specifically applied to the field of lubrication, I can only say that the ideal is very fulfilling and the reality is very tangible.
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05/192025
Nano diamond and anti friction agent (5) - Li Yunpeng
② Surface modification of nanoparticles. The so-called surface modification, also known as modification, is based on the characterization of the surface of nanodiamonds.
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05/192025
Nano diamond and anti friction agent (6) - Li Yunpeng
② Surface modification of nanoparticles. The so-called surface modification, also known as modification, is based on the characterization of the surface of nanodiamonds.
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05/192025
Nano diamond and anti friction agent (7) - Li Yunpeng
At this point in my writing, I believe that in the field of nanoscience research, especially in the field of carbon based nanotechnology, whether it is graphene, carbon nanotubes, nanodiamonds, fullerenes, etc., it basically includes zero dimensional nanoparticles, one-dimensional nanowires, and two-dimensional nanofilms.
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05/192025
Environmentally friendly lubricants and related issues (1) - Li Yunpeng
We, especially as chemical industry practitioners, often say that structure determines properties. For example, allotropes refer to elemental substances composed of the same single chemical element but with different properties. The same element has different physical and chemical properties due to its arrangement.
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05/192025
Environmentally friendly lubricants and related issues (2) - Li Yunpeng
The widely used biodegradation test method mentioned in the previous section is the CECL-33-T-93 published by the CEC (European Cooperation Committee), which can be used to evaluate various lubricants, but it cannot reflect the ecological toxicity of degradation products.
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09/112024
Environmentally friendly lubricants and related issues (3) - Li Yunpeng
Plant oil has the advantages of ① non toxicity, ② excellent biodegradability, ③ renewability, ④ good lubricity, ⑤ high viscosity index, ⑥ lower cost than synthetic oil.
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05/162024
Environmentally friendly lubricants and related issues (4) - Li Yunpeng
At this point, we already know that as a base oil for lubricants, the higher the content of linolenic acid in vegetable oil, the worse its oxidation stability. However, linolenic acid is a polyunsaturated fatty acid with three double bonds, which is an essential omega-3 fatty acid for the human body. As the human body cannot synthesize it itself, it needs to be ingested from the outside.
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04/172024
Environmentally friendly lubricants and related issues (V) - Li Yunpeng
If you browse the market, in terms of gear oil, the biodegradable industrial gear oil varieties on the market, such as Jiashiduo's Biotrans 220, Total CarterBio 220, Shell's Shell Naturelle 220, etc., all use synthetic esters as base oils. From the current development trend, synthetic esters are considered the most ideal base oil for biodegradable lubricants.
