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Title: Bioinspired large-scale aligned porous materials assembled with dual temperature gradients

Abstract

Natural materials, such as bone, teeth, shells, and wood, exhibit outstanding properties despite being porous and made of weak constituents. Frequently, they represent a source of inspiration to design strong, tough, and lightweight materials. Although many techniques have been introduced to create such structures, a long-range order of the porosity as well as a precise control of the final architecture remain difficult to achieve. These limitations severely hinder the scale-up fabrication of layered structures aimed for larger applications. We report on a bidirectional freezing technique to successfully assemble ceramic particles into scaffolds with large-scale aligned, lamellar, porous, nacre-like structure and long-range order at the centimeter scale. This is achieved by modifying the cold finger with a polydimethylsiloxane (PDMS) wedge to control the nucleation and growth of ice crystals under dual temperature gradients. Our approach could provide an effective way of manufacturing novel bioinspired structural materials, in particular advanced materials such as composites, where a higher level of control over the structure is required.

Authors:
 [1];  [2];  [3];  [2]; ORCiD logo [4]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Zhejiang Univ., Hangzhou (China)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. de Mons, Mons (Belgium)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1530212
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Science Advances
Additional Journal Information:
Journal Volume: 1; Journal Issue: 11; Journal ID: ISSN 2375-2548
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; biomimetic; ceramic scaffolds; nacre; freeze casting; ice nucleation

Citation Formats

Bai, Hao, Chen, Yuan, Delattre, Benjamin, Tomsia, Antoni P., and Ritchie, Robert O. Bioinspired large-scale aligned porous materials assembled with dual temperature gradients. United States: N. p., 2015. Web. doi:10.1126/sciadv.1500849.
Bai, Hao, Chen, Yuan, Delattre, Benjamin, Tomsia, Antoni P., & Ritchie, Robert O. Bioinspired large-scale aligned porous materials assembled with dual temperature gradients. United States. doi:10.1126/sciadv.1500849.
Bai, Hao, Chen, Yuan, Delattre, Benjamin, Tomsia, Antoni P., and Ritchie, Robert O. Fri . "Bioinspired large-scale aligned porous materials assembled with dual temperature gradients". United States. doi:10.1126/sciadv.1500849. https://www.osti.gov/servlets/purl/1530212.
@article{osti_1530212,
title = {Bioinspired large-scale aligned porous materials assembled with dual temperature gradients},
author = {Bai, Hao and Chen, Yuan and Delattre, Benjamin and Tomsia, Antoni P. and Ritchie, Robert O.},
abstractNote = {Natural materials, such as bone, teeth, shells, and wood, exhibit outstanding properties despite being porous and made of weak constituents. Frequently, they represent a source of inspiration to design strong, tough, and lightweight materials. Although many techniques have been introduced to create such structures, a long-range order of the porosity as well as a precise control of the final architecture remain difficult to achieve. These limitations severely hinder the scale-up fabrication of layered structures aimed for larger applications. We report on a bidirectional freezing technique to successfully assemble ceramic particles into scaffolds with large-scale aligned, lamellar, porous, nacre-like structure and long-range order at the centimeter scale. This is achieved by modifying the cold finger with a polydimethylsiloxane (PDMS) wedge to control the nucleation and growth of ice crystals under dual temperature gradients. Our approach could provide an effective way of manufacturing novel bioinspired structural materials, in particular advanced materials such as composites, where a higher level of control over the structure is required.},
doi = {10.1126/sciadv.1500849},
journal = {Science Advances},
number = 11,
volume = 1,
place = {United States},
year = {2015},
month = {12}
}

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