We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What is Polyaniline?

Mary McMahon
Updated May 21, 2024
Our promise to you
All The Science is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At All The Science, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

Polyaniline is among a family of conductive polymers, and has properties similar to some metals. It was discovered as “aniline black” in an organic form as part of melanin, a type of organic polymer, in 1934. Melanin does many things in nature, including protecting the skin by regulating UV exposure through a polyaniline interaction. In a natural form, polyaniline is usually found folded with other polymers. In the late 1990s, it became evident that it was a flexible and highly useful polymer, and could be used in applications ranging from intelligent windows to computer chips.

This polymer is unusual because it is a type of semiconductor. Polyaniline can be configured to conduct across a wide range, from being utterly non-conductive for insulation use to highly conductive for other electrical purposes. Like other polymers, it is highly flexible, which makes it appealing for manufacturing use. Polyaniline comes in a granular form that can be mixed with an organic chemical and painted or sprayed onto a substance to form a smooth layer. It can also be molded into various shapes, as was done in 2000 when it was used to manufacture a computer chip.

Polyaniline is made by polymerizing aniline molecules through a chemical reaction with a substance such as hydrochloric acid. This is usually performed by oxidizing the aniline molecules and mixing them slowly. Depending on the desired conductivity of the polyaniline, the resulting polymer will be exposed to other chemicals in a process called doping. Doping it leads to a more stable polymer, and will also allow it to conduct current evenly.

There are a variety of applications for polyaniline, which can be easily combined with other polymers to form desired shapes. It is frequently utilized in the computer industry where it is incorporated into static free packaging, flexible electronic components, and in testing to shield against electromagnetic radiation. It also appears in construction applications, and is frequently included in corrosion resistant treatments for various surfaces.

In the 1990s, it was predicted that polyaniline could change the face of the manufacturing world, allowing the rapid and easy construction of electronic components, insulators, and a wide range of gadgets and tools for modern society. The successful construction of a computer chip in 2000 suggested that the material would work in practical applications, and new uses are constantly being discovered, with more manufacturers adopting the versatile material for a wide range of applications every day.

All The Science is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Mary McMahon
By Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a All The Science researcher and writer. Mary has a liberal arts degree from Goddard College and spends her free time reading, cooking, and exploring the great outdoors.

Discussion Comments
By Gowthami — On Jun 05, 2011

Is the conductivity of polyaniline higher in an undoped condition or a doped condition. which one is better and please tell why it happens like that.

By anon26506 — On Feb 14, 2009

what are the methods of preparing polyaniline?

By anon21960 — On Nov 25, 2008

can polyaniline be used as a conductive additive in thermoset resin? Is it compatible with thermoset resin system?

By anon9336 — On Mar 04, 2008

why do polymers change its color after doping?

By anon6688 — On Jan 06, 2008

can Polyaniline be synthesized using cyclic voltametry? if yes, then can you please tell how?

Mary McMahon
Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a...

Learn more
All The Science, in your inbox

Our latest articles, guides, and more, delivered daily.

All The Science, in your inbox

Our latest articles, guides, and more, delivered daily.