Hydroxylation multi-walled carbon nanotubes (MWCNTs) with double open ends are widely used in various advanced applications due to their enhanced surface reactivity and functionalization. In the field of nanocomposites, these nanotubes are incorporated into polymer matrices to improve mechanical strength, thermal stability, and electrical conductivity, making them ideal for aerospace, automotive, and construction materials. They also serve as efficient fillers in conductive adhesives and coatings, enhancing performance in electronic devices.

In environmental applications, hydroxylated MWCNTs are employed in water purification systems for the adsorption of heavy metals and organic pollutants, owing to their high surface area and functional groups that facilitate binding. They are also used in gas sensors and biosensors due to their sensitivity and selectivity in detecting specific analytes.

In the biomedical field, these nanotubes are explored for drug delivery systems, where their functionalized surface allows for the attachment of therapeutic agents, enabling targeted and controlled release. Additionally, they are used in tissue engineering scaffolds to promote cell adhesion and growth, benefiting regenerative medicine. Their unique properties make them versatile in energy storage devices like supercapacitors and batteries, where they enhance electrode performance and charge storage capacity.