Carboxylated cellulose nanofibers are widely used in the production of high-performance materials due to their exceptional mechanical strength and biodegradability. In the paper industry, they enhance the strength and durability of paper products while reducing the need for synthetic additives. They are also utilized in the development of lightweight, strong composites for automotive and aerospace applications, contributing to fuel efficiency and reduced emissions.

In the biomedical field, these nanofibers are employed in wound dressings and drug delivery systems due to their biocompatibility and ability to form hydrogels. They provide a moist environment for wound healing and can control the release of active pharmaceutical ingredients. Additionally, they are used in water purification systems as effective filtration materials, capable of removing heavy metals and other contaminants from wastewater.

Their application in the food industry includes use as stabilizers, thickeners, and emulsifiers, improving the texture and shelf life of various products. Furthermore, carboxylated cellulose nanofibers are being explored for use in flexible electronics and energy storage devices, such as supercapacitors, due to their conductive properties and sustainability.