Super Gas Barrier and Fire Resistance of Nanoplatelet/Nanofibril Multilayer Thin Films
- Department of Materials Science and Engineering 3123 TAMU College Station TX 77843 USA
- Department of Fibre and Polymer Technology School of Engineering Sciences in Chemistry Biotechnology and Health KTH Royal Institute of Technology Teknikringen 56 SE‐100 44 Stockholm Sweden
- Department of Chemistry 3123 TAMU College Station TX 77843 USA
- Department of Materials Science and Engineering 3123 TAMU College Station TX 77843 USA, Department of Chemistry 3123 TAMU College Station TX 77843 USA
Abstract Cellulose 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 cellulose‐based films, cationic CNF are assembled with anionic vermiculite (VMT) clay using the layer‐by‐layer 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 (m 2 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, cellulose‐based nanocoating that could be used in a variety of packaging and protection applications.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1482415
- Journal Information:
- Advanced Materials Interfaces, Journal Name: Advanced Materials Interfaces Vol. 6 Journal Issue: 2; ISSN 2196-7350
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- Germany
- Language:
- English
Web of Science
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