Abstract: A composite nanofiber aerogel (CNA) is formed from aramid nanofibers (ANFs) combined with polyvinyl alcohol (PVA). These nanoscale constituents of the aerogel form 3D networks with high nodal connectivity and strongly welded connectivity joints between fibrils so that the structure has high stiffness and strength compared to other polymeric aerogels and successive breakage of crosslinks at the connectivity nodes affords energy dissipation while maintaining the overall structural integrity. A specific class of CNA with a specific solid content may be used to form a thin firm with a composite nanofiber framework (CNFF) that is useful in the manufacture of kirigami wearable electronics.

Abstract: The present invention provides a class of magnetic hydrogels with tissue-mimetic mechanical properties and photothermal welding/healing capability. In these hydrogels, a hybrid network involving aramid nanofibers, functionalized Fe3O4 nanoparticles, and polyvinyl alcohol (PVA) is accomplished by a stepwise assembly of the functional components. The engineered interactions between nanoscale constituents enable facile materials processing and confer a combination of excellent mechanical properties, magnetism, water content and porosity.

Abstract: A composite nanofiber aerogel (CNA) is formed from aramid nanofibers (ANFs) combined with polyvinyl alcohol (PVA). These nanoscale constituents of the aerogel form 3D networks with high nodal connectivity and strongly welded connectivity joints between fibrils so that the structure has high stiffness and strength compared to other polymeric aerogels and successive breakage of crosslinks at the connectivity nodes affords energy dissipation while maintaining the overall structural integrity. A specific class of CNA with a specific solid content may be used to form a thin firm with a composite nanofiber framework (CNFF) that is useful in the manufacture of kirigami wearable electronics.