Abstract
The aramid nanofibers (ANFs) are isolated from commercial para-aramid fiber, a class of strong and heat-resistant synthetic fibers. They comprise dense inter-molecular hydrogen bonds among highly aligned molecular chains, resulting in outstanding modulus and strength-to-weight properties comparable to carbon fiber and cellulose nanofiber. The aramid nanofibers show a high aspect ratio with a nano-sized diameter and micro-scaled length. These have been spotlighted as promising nano-building blocks with their excellent mechanical properties and thermal stability. In addition, it is an eco-friendly and cost-effective system as one way to recycle waste aramid fibers generated from the rapidly growing aramid textile market. Herein, ANFs-based multidimensional structures with high specific modulus, strength and toughness, such as 1D ANFs assembled filament, 2D ANF nanocomposite film, and 3D ANF reinforced polymer structures, are introduced with various designed fabrication technologies.
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