How Do They Get Teflon, A Non-Stick Material, To Stick To Pans?

Teflon is a non-stick material that is used to coat pans and other cooking utensils. It is made from a synthetic polymer of tetrafluoroethylene, which is a chemical compound that contains only carbon and fluorine atoms. Teflon is hydrophobic, meaning that it does not allow water or other water-containing substances to wet it or stick to it. In order to make Teflon stick to pans, DuPoint Co. uses a method called sandblasting, which involves spraying a primer layer of Teflon on the pan and then baking it at a high temperature.

Non-stick utensils, i.e., utensils with a powerful coating of Teflon, are a remarkable invention of mankind, especially for those people who spend a lot of time doing the dishes or cooking complicated meals with many pots and pans. Those who have no idea what Teflon is all about, rest assured, you’re in for a crash course!


Recommended Video for you:


Teflon… What Is It?

Teflon is actually the brand name of PTFE-based compounds made by DuPoint Co., an organization that is credited with the invention of the compound. However, what is PTFE?

teflon meme1

PTFE is a synthetic polymer of tetrafluoroethylene; in simple terms, it’s a chemical compound. More specifically, it’s a fluorocarbon that only contains atoms of carbon and fluorine, which are bound together quite strongly. The compound has countless applications, especially because it is hydrophobic in nature, meaning that neither water nor other water-containing substances can ‘wet’ it or stick to it. This is the most important reason why PTFE is so commonly used in non-stick cookware, as it doesn’t let any outside substance bind to it easily. Imagine making scrambled eggs and having that crusty, impossible to remove mess in a normal frying pan. With PTFE, you don’t have any of those problems!

The question is, how does a material like this, which is so shy in terms of ‘gelling’ with other substances, manage to stick to those utensils in the first place to make them ‘non-stick’?

Sticking a Non-Sticky Material

teflon 1 meme

As I said, Teflon is a shy and introverted material, so in order to help it get along with other materials, or at least the utensils that need a non-stick coating, you probably need external help. And that help will have to be rather impressive…

Method#1: Sandblasting

There are a few different methods that can be used to make Teflon stick to pans. The method used by DuPoint itself involves ‘sandblasting’ the pan to create an uneven surface, which is best suited for encouraging the adherence of teflon to the surface. If you don’t know what this is, sandblasting is a process through which very minute, uniform particles are propelled at a target at high speeds. It’s called ‘sandblasting’ because some years ago, sand was the most common material used for the purpose. Sandblasting is generally used to clean or make etchings on a material.

teflon

Teflon’s surface is non-sticky (Credit: Pefkos/Shutterstock)

After the pan is sandblasted, a primer layer of Teflon is sprayed on before it is baked at a high temperature. This way, Teflon is secured in place in a nice and tight ‘mechanical grip’, basically like the way ice cubes get stuck in an ice tray. A few more rounds of spraying Teflon onto the surface is done before the object is finally deemed a ‘finished product’.

Method#2: Sintering

Another method involves heating Teflon to a very high temperature and pressing it firmly against the pan. Sounds pretty rudimentary, right?

easy meme

Well, it actually isn’t. If you did heat Teflon to a high temperature and then press it hard enough against the desired pan, then it does, in fact, stick to the pan (referred to as ‘sintering’ in scientific circles). However, there is a caveat to this. As soon as the pan is brought back to normal room conditions, the layer of Teflon would peel away quite easily, and you would be back at square one.

Since you don’t want that to happen, before sticking it to the pan, Teflon is subjected to a onslaught of ions in a high vacuum under an electric field. This weakens the forces holding some of the fluorine atoms to carbon atoms, and consequently, some of the bonds holding fluorine atoms break. As a result, carbon atoms bind to other groups of atoms (like oxygen atoms) that stick firmly to the surface. After this is done, they carry out the process of sintering; therefore, the layer of Teflon that is formed adheres strongly to the pan.

Method#3: Using a Reducing Agent

reducing agent meme

There’s one final method, although it is quite similar to the one mentioned above. In this method, a reducing agent is used. Essentially, this is a compound that ‘reduces’ the bonds, or in other words, breaks the bonds between carbon and fluorine atoms, which allows fluorine atoms to bind to each other. Our beloved carbon atoms become free and begin desperately looking for some company. In effect, the free carbon, which turns into unsaturated hydrocarbons, becomes sticky enough to get the Teflon sheet to adhere to the pan.

Only after going through all these treatments and hardships does Teflon become ‘kind’ enough to impart that vital ‘non-stick’ property to utensils. Therefore, it’s only fair that we treat our non-stick utensils with the utmost care, and take a ‘soft’ touch (literally) when washing them after use.

Suggested Reading

Was this article helpful?
YesNo
Help us make this article better

Follow ScienceABC on Social Media:

About the Author

Ashish is a Science graduate (Bachelor of Science) from Punjabi University (India). He spearheads the content and editorial wing of ScienceABC and manages its official Youtube channel. He’s a Harry Potter fan and tries, in vain, to use spells and charms (Accio! [insert object name]) in real life to get things done. He totally gets why JRR Tolkien would create, from scratch, a language spoken by elves, and tries to bring the same passion in everything he does. A big admirer of Richard Feynman and Nikola Tesla, he obsesses over how thoroughly science dictates every aspect of life… in this universe, at least.

.
Science ABC YouTube Videos

  1. Slowing or Reversing Aging: Can We Live for 180 years?Slowing or Reversing Aging: Can We Live for 180 years?
  2. Detectives Use this Simple Technique to Find Your Fingerprints (Even AFTER You Have Wiped Them Off)!Detectives Use this Simple Technique to Find Your Fingerprints (Even AFTER You Have Wiped Them Off)!
  3. Why is a Circle 360 Degrees, Why Not a Simpler Number, like 100?Why is a Circle 360 Degrees, Why Not a Simpler Number, like 100?
  4. Quantum Physics: Here’s Why Movies Always Get It WrongQuantum Physics: Here’s Why Movies Always Get It Wrong
  5. Do Fish Get Thirsty and Do They Need to Drink Water?Do Fish Get Thirsty and Do They Need to Drink Water?
  6. Gasoline (Petrol) vs Diesel: Which one is better? A Beginner’s GuideGasoline (Petrol) vs Diesel: Which one is better? A Beginner’s Guide
  7. Black Holes Explained: What Is a Black Hole? How They Form?Black Holes Explained: What Is a Black Hole? How They Form?
  8. Gut Microbiome Explained in Simple WordsGut Microbiome Explained in Simple Words