Strong reinforcement effects in 2D cellulose nanofibril-graphene oxide (CNF-GO) nanocomposites due to GO-induced CNF ordering
Journal article, 2020

Nanocomposites from native cellulose with low 2D nanoplatelet content are of interest as sustainable materials combining functional and structural performance. Cellulose nanofibril-graphene oxide (CNF-GO) nanocomposite films are prepared by a physical mixing-drying method, with a focus on low GO content, the use of very large GO platelets (2-45 mu m) and nanostructural characterization using synchrotron X-ray source for WAXS and SAXS. These nanocomposites can be used as transparent coatings, strong films or membranes, as gas barriers or in laminated form. CNF nanofibrils with random in-plane orientation, form a continuous non-porous matrix with GO platelets oriented in-plane. GO reinforcement mechanisms in CNF are investigated, and relationships between nanostructure and suspension rheology, mechanical properties, optical transmittance and oxygen barrier properties are investigated as a function of GO content. A much higher modulus reinforcement efficiency is observed than in previous polymer-GO studies. The absolute values for modulus and ultimate strength are as high as 17 GPa and 250 MPa at a GO content as small as 0.07 vol%. The remarkable reinforcement efficiency is due to improved organization of the CNF matrix; and this GO-induced mechanism is of general interest for nanostructural tailoring of CNF-2D nanoplatelet composites.

Author

Hanieh Mianehrow

Royal Institute of Technology (KTH)

Giada Lo Re

Chalmers, Industrial and Materials Science, Engineering Materials

Federico Carosio

Polytechnic University of Turin

Alberto Fina

Polytechnic University of Turin

Per Tomas Larsson

Royal Institute of Technology (KTH)

RISE Research Institutes of Sweden

Pan Chen

Royal Institute of Technology (KTH)

Beijing Institute of Technology

Lars A. Berglund

Royal Institute of Technology (KTH)

Journal of Materials Chemistry A

2050-7488 (ISSN) 2050-7496 (eISSN)

Vol. 8 34 17608-17620

Subject Categories

Polymer Technologies

Materials Chemistry

Composite Science and Engineering

DOI

10.1039/d0ta04406g

More information

Latest update

10/29/2020