Functionalization of Carbon Nanotubes and Polymer Nanocomposites and Synthesis of Multiwall Carbon Nanotubes via Chemical Vapor Deposition for Wearable Sensor Applications

Functionalization of CNTs is a convenient strategy to tackle low dispersion and solubilization of CNTs in many solvents or polymers. It can be done by covalent or non-covalent surface Functionalization, which is briefly discussed in the current literature. Endohedral and exo-hedral are conventional methods based on covalent and van der Waals bonding forces created through CNT functionalization by various materials. This chapter proposes a review of approaches and mechanisms of functionalization of CNTs. The second part of the chapter details a novel approach to modify multi-walled carbon nanotubes (MWCNTs) and synthesize Ag/MWCNTs hybrid materials. The process involves the oxidation of raw MWCNTs using a concentrated acid mixture (HNO3:H2SO4, 1:3) with ultrasonic assistance, introducing functional groups. Subsequently, Ag nanoparticles are strategically attached to the functionalized MWCNTs through a chemical reduction process, forming Ag/MWCNTs hybrids. Characterization of the resulting materials reveals valuable insights: The practical applications of Ag/MWCNTs hybrid materials, composites, and polymers in wearable technology are explored, primarily focusing on their sensor properties. This research underscores the effectiveness of incorporating Ag/MWCNTs hybrid materials within composites and polymer matrices in wearable technology. They are valuable candidates for various applications, from healthcare to sports and fitness.