Polytetrafluoroethylene is commonly known as Teflon.
It has a certain hydrophobic and oleophobic effect, that is, the effect of not sticking to water and not sticking to oil as you said.
For oleophobicity, there are two general evaluation criteria, namely oleophobic angle and rolling angle.
The larger the oleophobic angle, the thinner the oil stain will be, and if it is a drop, it will form a spherical shape.
The smaller the rolling angle, the easier it is for the oil droplets to roll.
There are special standard test fluids for the determination of hydrophobic angle and rolling angle.
Rapeseed oil has a high viscosity. If the oleophobic angle of the vegetable oil on the Teflon is not large enough, it will spread flat and will not be gathered; if the rolling angle is not enough, it will not roll, and if it is forced to roll, a string of small beads will form behind.
So, nothing is non-stick to any liquid.
Finally, the concepts of hydrophobic and oleophobic, self-cleaning and easy-cleaning have both similarities and differences.
Self-cleaning generally means that it can be peeled off by itself in a natural environment; easy-to-clean allows cleaning with a small amount of external force.
If the non-stick pan is self-cleaning, then after you finish cooking, turn it upside down and the pan will be clean. Easy to clean, that is, you have to rinse it with water and wipe it with a rag to clean it.
