Polyaniline is widely used in the electronics industry due to its conductive properties. It is employed in the production of sensors, which can detect gases, humidity, and other environmental factors. Its ability to change conductivity in response to different stimuli makes it valuable for creating smart materials.

In the field of energy storage, polyaniline is utilized in supercapacitors and batteries. Its high charge capacity and stability enhance the performance of these devices, making them more efficient and durable. Additionally, it is used in corrosion protection coatings for metals, providing a barrier that prevents oxidation and degradation.

Polyaniline also finds applications in the textile industry, where it is used to create conductive fabrics. These fabrics can be integrated into wearable electronics, offering functionalities like temperature regulation and signal transmission. Furthermore, it is used in antistatic packaging materials to protect sensitive electronic components from static electricity.

In the medical field, polyaniline is explored for its potential in drug delivery systems. Its ability to respond to pH changes allows for controlled release of medications, improving treatment efficacy. It is also investigated for use in biosensors, which can monitor biological processes in real-time.

Additionally, polyaniline is applied in filtration and separation technologies, such as customizable membranes for substance separation or water treatment, leveraging its adaptable structure.