Fabrication of hard, yet flexible 3D nanocomposite for protective film via proximity-field nanopatterning

Abstract

Protective film for flexible display can be realized by using 3D nanocomposite that combines organic-inorganic hybrid material as a matrix with 3D ceramic nanostructure as a reinforcement. Furthermore, additional heat treatment of 3D ceramic nanostructure can maximize the mechanical performance of 3D nanocomposite. By using dual-scale reinforcement: molecular level distribution of inorganic nanofillers and 3D continuous and ordered nanostructure, 3D nanocomposite shows improved hardness (1.31 GPa) and elastic modulus (18.82 GPa) by 200 % compared to pure ESMH. In addition, high transparency (≈85% at 550 nm) and flexibility can be demonstrated simultaneously. Lastly, fabricated 3D nanocomposite shows ceramic-like wear resistance and outstanding impact resistance, which can be a great option for flexible protective film.