Super Gas Barrier and Fire Resistance of Nanoplatelet/Nanofibril Multilayer Thin Films Academic Article uri icon

abstract

  • AbstractCellulose nanofibrils (CNF) are abundant in the fiber cell walls of many plants and are considered a nearly inexhaustible resource. With the goal of improving the flame resistance and gas barrier properties of cellulosebased films, cationic CNF are assembled with anionic vermiculite (VMT) clay using the layerbylayer deposition process. The highly aligned VMT nanoplatelets, together with cellulose nanofibrils, form a nanobrick wall structure that exhibits high optical transparency, flame resistance, super oxygen barrier, and high modulus. A 20 CNF/VMT bilayer (BL) nanocoating, with a thickness of only 136 nm, exhibits an oxygen transmission rate of 0.013 cc (m2 day atm)1. With only 2 BL of CNF/VMT, the melting of flexible polyurethane foam exposed to a butane torch is prevented. These nanocoatings also exhibit a high elastic modulus (20 GPa) and hardness (1 GPa). This study demonstrates a unique, renewable, cellulosebased nanocoating that could be used in a variety of packaging and protection applications.

published proceedings

  • ADVANCED MATERIALS INTERFACES

altmetric score

  • 55.448

author list (cited authors)

  • Qin, S., Pour, M. G., Lazar, S., Koklukaya, O., Gerringer, J., Song, Y., Wagberg, L., & Grunlan, J. C.

citation count

  • 52

complete list of authors

  • Qin, Shuang||Pour, Maryam Ghanad||Lazar, Simone||Koklukaya, Oruc||Gerringer, Joseph||Song, Yixuan||Wagberg, Lars||Grunlan, Jaime C

publication date

  • January 2019

publisher