Nacre-mimetics with synthetic nanoclays up to ultrahigh aspect ratios

Paramita Das, Jani-Markus Malho, Khosrow Rahimi, Felix H. Schacher, Baochun Wang, Dan Eugen Demco, Andreas Walther

Research output: Contribution to journalArticleScientificpeer-review

97 Citations (Scopus)

Abstract

Nacre-mimetics hold great promise as mechanical high-performance and functional materials. Here we demonstrate large progress of mechanical and functional properties of self-assembled polymer/nanoclay nacre-mimetics by using synthetic nanoclays with aspect ratios covering three orders in magnitude (25-3,500). We establish comprehensive relationships among structure formation, nanostructuration, deformation mechanisms and mechanical properties as a function of nanoclay aspect ratio, and by tuning the viscoelastic properties of the soft phase via hydration. Highly ordered, large-scale nacre-mimetics are obtained even for low aspect ratio nanoplatelets and show pronounced inelastic deformation with very high toughness, while those formed by ultralarge nanoplatelets exhibit superb stiffness and strength, previously only reachable for highly crosslinked materials. Regarding functionalities, we report formerly impossible glass-like transparency, and excellent gas barrier considerably exceeding earlier nacre-mimetics based on natural nanoclay. Our study enables rational design of future high-performance nacre-mimetic materials and opens avenues for ecofriendly, transparent, self-standing and strong advanced barrier materials.
Original languageEnglish
Article number5967
JournalNature Communications
Volume6
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

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Nacre
aspect ratio
Aspect ratio
mechanical properties
low aspect ratio
toughness
hydration
stiffness
coverings
tuning
Functional materials
glass
Hydration
Transparency
polymers
Toughness
Glass
Polymers
gases
Tuning

Keywords

  • Biomimetic synthesis
  • Nanoscale materials

Cite this

Das, P., Malho, J-M., Rahimi, K., Schacher, F. H., Wang, B., Demco, D. E., & Walther, A. (2015). Nacre-mimetics with synthetic nanoclays up to ultrahigh aspect ratios. Nature Communications, 6, [5967]. https://doi.org/10.1038/ncomms6967
Das, Paramita ; Malho, Jani-Markus ; Rahimi, Khosrow ; Schacher, Felix H. ; Wang, Baochun ; Demco, Dan Eugen ; Walther, Andreas. / Nacre-mimetics with synthetic nanoclays up to ultrahigh aspect ratios. In: Nature Communications. 2015 ; Vol. 6.
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Das, P, Malho, J-M, Rahimi, K, Schacher, FH, Wang, B, Demco, DE & Walther, A 2015, 'Nacre-mimetics with synthetic nanoclays up to ultrahigh aspect ratios', Nature Communications, vol. 6, 5967. https://doi.org/10.1038/ncomms6967

Nacre-mimetics with synthetic nanoclays up to ultrahigh aspect ratios. / Das, Paramita; Malho, Jani-Markus; Rahimi, Khosrow; Schacher, Felix H.; Wang, Baochun; Demco, Dan Eugen; Walther, Andreas.

In: Nature Communications, Vol. 6, 5967, 2015.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Nacre-mimetics with synthetic nanoclays up to ultrahigh aspect ratios

AU - Das, Paramita

AU - Malho, Jani-Markus

AU - Rahimi, Khosrow

AU - Schacher, Felix H.

AU - Wang, Baochun

AU - Demco, Dan Eugen

AU - Walther, Andreas

PY - 2015

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N2 - Nacre-mimetics hold great promise as mechanical high-performance and functional materials. Here we demonstrate large progress of mechanical and functional properties of self-assembled polymer/nanoclay nacre-mimetics by using synthetic nanoclays with aspect ratios covering three orders in magnitude (25-3,500). We establish comprehensive relationships among structure formation, nanostructuration, deformation mechanisms and mechanical properties as a function of nanoclay aspect ratio, and by tuning the viscoelastic properties of the soft phase via hydration. Highly ordered, large-scale nacre-mimetics are obtained even for low aspect ratio nanoplatelets and show pronounced inelastic deformation with very high toughness, while those formed by ultralarge nanoplatelets exhibit superb stiffness and strength, previously only reachable for highly crosslinked materials. Regarding functionalities, we report formerly impossible glass-like transparency, and excellent gas barrier considerably exceeding earlier nacre-mimetics based on natural nanoclay. Our study enables rational design of future high-performance nacre-mimetic materials and opens avenues for ecofriendly, transparent, self-standing and strong advanced barrier materials.

AB - Nacre-mimetics hold great promise as mechanical high-performance and functional materials. Here we demonstrate large progress of mechanical and functional properties of self-assembled polymer/nanoclay nacre-mimetics by using synthetic nanoclays with aspect ratios covering three orders in magnitude (25-3,500). We establish comprehensive relationships among structure formation, nanostructuration, deformation mechanisms and mechanical properties as a function of nanoclay aspect ratio, and by tuning the viscoelastic properties of the soft phase via hydration. Highly ordered, large-scale nacre-mimetics are obtained even for low aspect ratio nanoplatelets and show pronounced inelastic deformation with very high toughness, while those formed by ultralarge nanoplatelets exhibit superb stiffness and strength, previously only reachable for highly crosslinked materials. Regarding functionalities, we report formerly impossible glass-like transparency, and excellent gas barrier considerably exceeding earlier nacre-mimetics based on natural nanoclay. Our study enables rational design of future high-performance nacre-mimetic materials and opens avenues for ecofriendly, transparent, self-standing and strong advanced barrier materials.

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Das P, Malho J-M, Rahimi K, Schacher FH, Wang B, Demco DE et al. Nacre-mimetics with synthetic nanoclays up to ultrahigh aspect ratios. Nature Communications. 2015;6. 5967. https://doi.org/10.1038/ncomms6967