Jump to main content
Jump to site search

Issue 1, 2014
Previous Article Next Article

Highly tough and transparent layered composites of nanocellulose and synthetic silicate

Author affiliations

Abstract

A highly tough and transparent film material was prepared from synthetic saponite (SPN) nanoplatelets of low aspect ratios and nanofibrillar cellulose. The nanofibrillar cellulose was chemically modified by topological surface oxidation using 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO) as a catalyst. Both synthetic SPN nanoplatelets and TEMPO-oxidized cellulose nanofibrils (TOCNs) have abundant negative charges in high densities on their surfaces and are dispersed in water at the individual nanoelement level. Layered nanocomposite structures of the SPN nanoplatelets and TOCNs were formed through a simple cast-drying process of the mixed aqueous dispersions. The TOCN/SPN composites with 0–50% w/w SPN content were optically transparent. Mechanical properties of the TOCN/SPN composites varied depending on the SPN content. The composite with 10% w/w SPN content (5.6% volume fraction) exhibited characteristic mechanical properties: Young's modulus of 14 GPa, tensile strength of 420 MPa, and strain-to-failure of 10%. The work of fracture of the composites increased from 4 to 30 MJ m−3 – or by more than 700% – as the SPN content was increased from 0 to 10% w/w. This surprising improvement in toughness was interpreted based on a model for fracture of polymer composites reinforced with low-aspect-ratio platelets.

Graphical abstract: Highly tough and transparent layered composites of nanocellulose and synthetic silicate

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 05 Aug 2013, accepted on 15 Oct 2013 and first published on 17 Oct 2013


Article type: Paper
DOI: 10.1039/C3NR04102F
Citation: Nanoscale, 2014,6, 392-399
  •   Request permissions

    Highly tough and transparent layered composites of nanocellulose and synthetic silicate

    C. Wu, Q. Yang, M. Takeuchi, T. Saito and A. Isogai, Nanoscale, 2014, 6, 392
    DOI: 10.1039/C3NR04102F

Search articles by author