Facile access to large-scale, self-assembled, nacre-inspired, high-performance materials with tunable nanoscale periodicities

Paramita Das, Susanne Schipmann, Jani-Markus Malho, Baolei Zhu, Uwe Klemradt, Andreas Walther (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

70 Citations (Scopus)

Abstract

Although advances have been reported to mimic the mechanically excellent structure of natural nacre, larger-scale applications are still limited due to time and energy-intensive preparation pathways. Herein, we demonstrate that simple high-shear homogenization of dispersions containing biobased high molecular weight sodium carboxymethyl cellulose (700 kg/mol, CMC) and natural sodium montmorillonite (MTM), serving as the soft energy-dissipating phase and reinforcing platelets, respectively, can be used to prepare large-area and thick films with well-aligned hard/soft nacre-mimetic mesostructure. During this process, core–shell nanoplatelets with intrinsic hard/soft structure form, which then self-assemble into a layered nanocomposite during water removal. The nanoscale periodicities of the alternating hard/soft layers can be precisely tuned by changing the ratio of CMC to MTM, which allows studying the evolution of mechanical properties as a function of the lamellar nanoscale periodicity and fractions of hard to soft material. Remarkable mechanical stiffness (25 GPa) and strength (320 MPa) can be obtained placing these materials among the top end of nacre-inspired materials reported so far. Mechanical homogenization also allows direct preparation of concentrated, yet homogeneous, gel-like dispersions of high nanoclay content, suited to doctor-blade large-area and thick films with essentially the same properties as films cast from dilute dispersions. In terms of functional properties, we report high-transparency, shape-persistent fire-blocking and the ability to surface-pattern via inkjet printing. Considering the simple, fully scalable, waterborne preparation pathway, and the use of nature-based components, we foresee applications as ecofriendly, bioinspired materials to promote sustainable engineering materials and novel types of functional barrier coatings and substrates.
Original languageEnglish
Pages (from-to)3738-3747
JournalACS Applied Materials & Interfaces
Volume5
Issue number9
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

Fingerprint

Nacre
Dispersions
Bentonite
Clay minerals
Thick films
Sodium
Carboxymethylcellulose Sodium
Platelets
Transparency
Printing
Cellulose
Nanocomposites
Fires
Gels
Molecular weight
Stiffness
Coatings
Mechanical properties
Water
Substrates

Keywords

  • biomimetic materials
  • layered nanocomposite
  • nacre
  • self-assembly
  • structure-property relationships

Cite this

Das, Paramita ; Schipmann, Susanne ; Malho, Jani-Markus ; Zhu, Baolei ; Klemradt, Uwe ; Walther, Andreas. / Facile access to large-scale, self-assembled, nacre-inspired, high-performance materials with tunable nanoscale periodicities. In: ACS Applied Materials & Interfaces. 2013 ; Vol. 5, No. 9. pp. 3738-3747.
@article{ec5fec28b9d241dfb8653cc6b3ea2182,
title = "Facile access to large-scale, self-assembled, nacre-inspired, high-performance materials with tunable nanoscale periodicities",
abstract = "Although advances have been reported to mimic the mechanically excellent structure of natural nacre, larger-scale applications are still limited due to time and energy-intensive preparation pathways. Herein, we demonstrate that simple high-shear homogenization of dispersions containing biobased high molecular weight sodium carboxymethyl cellulose (700 kg/mol, CMC) and natural sodium montmorillonite (MTM), serving as the soft energy-dissipating phase and reinforcing platelets, respectively, can be used to prepare large-area and thick films with well-aligned hard/soft nacre-mimetic mesostructure. During this process, core–shell nanoplatelets with intrinsic hard/soft structure form, which then self-assemble into a layered nanocomposite during water removal. The nanoscale periodicities of the alternating hard/soft layers can be precisely tuned by changing the ratio of CMC to MTM, which allows studying the evolution of mechanical properties as a function of the lamellar nanoscale periodicity and fractions of hard to soft material. Remarkable mechanical stiffness (25 GPa) and strength (320 MPa) can be obtained placing these materials among the top end of nacre-inspired materials reported so far. Mechanical homogenization also allows direct preparation of concentrated, yet homogeneous, gel-like dispersions of high nanoclay content, suited to doctor-blade large-area and thick films with essentially the same properties as films cast from dilute dispersions. In terms of functional properties, we report high-transparency, shape-persistent fire-blocking and the ability to surface-pattern via inkjet printing. Considering the simple, fully scalable, waterborne preparation pathway, and the use of nature-based components, we foresee applications as ecofriendly, bioinspired materials to promote sustainable engineering materials and novel types of functional barrier coatings and substrates.",
keywords = "biomimetic materials, layered nanocomposite, nacre, self-assembly, structure-property relationships",
author = "Paramita Das and Susanne Schipmann and Jani-Markus Malho and Baolei Zhu and Uwe Klemradt and Andreas Walther",
year = "2013",
doi = "10.1021/am400350q",
language = "English",
volume = "5",
pages = "3738--3747",
journal = "ACS Applied Materials & Interfaces",
issn = "1944-8244",
publisher = "American Chemical Society",
number = "9",

}

Facile access to large-scale, self-assembled, nacre-inspired, high-performance materials with tunable nanoscale periodicities. / Das, Paramita; Schipmann, Susanne; Malho, Jani-Markus; Zhu, Baolei; Klemradt, Uwe; Walther, Andreas (Corresponding Author).

In: ACS Applied Materials & Interfaces, Vol. 5, No. 9, 2013, p. 3738-3747.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Facile access to large-scale, self-assembled, nacre-inspired, high-performance materials with tunable nanoscale periodicities

AU - Das, Paramita

AU - Schipmann, Susanne

AU - Malho, Jani-Markus

AU - Zhu, Baolei

AU - Klemradt, Uwe

AU - Walther, Andreas

PY - 2013

Y1 - 2013

N2 - Although advances have been reported to mimic the mechanically excellent structure of natural nacre, larger-scale applications are still limited due to time and energy-intensive preparation pathways. Herein, we demonstrate that simple high-shear homogenization of dispersions containing biobased high molecular weight sodium carboxymethyl cellulose (700 kg/mol, CMC) and natural sodium montmorillonite (MTM), serving as the soft energy-dissipating phase and reinforcing platelets, respectively, can be used to prepare large-area and thick films with well-aligned hard/soft nacre-mimetic mesostructure. During this process, core–shell nanoplatelets with intrinsic hard/soft structure form, which then self-assemble into a layered nanocomposite during water removal. The nanoscale periodicities of the alternating hard/soft layers can be precisely tuned by changing the ratio of CMC to MTM, which allows studying the evolution of mechanical properties as a function of the lamellar nanoscale periodicity and fractions of hard to soft material. Remarkable mechanical stiffness (25 GPa) and strength (320 MPa) can be obtained placing these materials among the top end of nacre-inspired materials reported so far. Mechanical homogenization also allows direct preparation of concentrated, yet homogeneous, gel-like dispersions of high nanoclay content, suited to doctor-blade large-area and thick films with essentially the same properties as films cast from dilute dispersions. In terms of functional properties, we report high-transparency, shape-persistent fire-blocking and the ability to surface-pattern via inkjet printing. Considering the simple, fully scalable, waterborne preparation pathway, and the use of nature-based components, we foresee applications as ecofriendly, bioinspired materials to promote sustainable engineering materials and novel types of functional barrier coatings and substrates.

AB - Although advances have been reported to mimic the mechanically excellent structure of natural nacre, larger-scale applications are still limited due to time and energy-intensive preparation pathways. Herein, we demonstrate that simple high-shear homogenization of dispersions containing biobased high molecular weight sodium carboxymethyl cellulose (700 kg/mol, CMC) and natural sodium montmorillonite (MTM), serving as the soft energy-dissipating phase and reinforcing platelets, respectively, can be used to prepare large-area and thick films with well-aligned hard/soft nacre-mimetic mesostructure. During this process, core–shell nanoplatelets with intrinsic hard/soft structure form, which then self-assemble into a layered nanocomposite during water removal. The nanoscale periodicities of the alternating hard/soft layers can be precisely tuned by changing the ratio of CMC to MTM, which allows studying the evolution of mechanical properties as a function of the lamellar nanoscale periodicity and fractions of hard to soft material. Remarkable mechanical stiffness (25 GPa) and strength (320 MPa) can be obtained placing these materials among the top end of nacre-inspired materials reported so far. Mechanical homogenization also allows direct preparation of concentrated, yet homogeneous, gel-like dispersions of high nanoclay content, suited to doctor-blade large-area and thick films with essentially the same properties as films cast from dilute dispersions. In terms of functional properties, we report high-transparency, shape-persistent fire-blocking and the ability to surface-pattern via inkjet printing. Considering the simple, fully scalable, waterborne preparation pathway, and the use of nature-based components, we foresee applications as ecofriendly, bioinspired materials to promote sustainable engineering materials and novel types of functional barrier coatings and substrates.

KW - biomimetic materials

KW - layered nanocomposite

KW - nacre

KW - self-assembly

KW - structure-property relationships

U2 - 10.1021/am400350q

DO - 10.1021/am400350q

M3 - Article

VL - 5

SP - 3738

EP - 3747

JO - ACS Applied Materials & Interfaces

JF - ACS Applied Materials & Interfaces

SN - 1944-8244

IS - 9

ER -