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Fabrication of novel lightweight composites by a hydrogel templating technique

Mehl, Georg H.; Rutkevičius, Marius; Rutkevicius, Marius; Munusami, Sellva K.; Watson, Zoe; Field, Adam D.; Salt, Michelle; Stoyanov, Simeon D.; Petkov, Jordan; Mehl, Georg; Paunov, Vesselin N.

Authors

Georg H. Mehl

Marius Rutkevičius

Marius Rutkevicius

Sellva K. Munusami

Zoe Watson

Adam D. Field

Michelle Salt

Simeon D. Stoyanov

Jordan Petkov



Abstract

A non-conventional way of preparation of lightweight porous materials by templating hydrogels with a range of hydrophilic and hydrophobic scaffolding materials was explored. Sub-millimetre hydrogel slurries of polyacrylamide and gellan gum were templated with aqueous slurries of cement, gypsum and clay–cement mixtures or alternatively, dispersed in curable polydimethylsiloxane (PDMS). After the solidification of the scaffolding material, the evaporation of structured hydrogel produced porous composite material whose pores mimic the hydrogel meso-structure. We studied the density, volume contraction and the compression strength of the formed porous materials as function of the hydrogel initial volume fraction. This versatile hydrogel templating method can be applied very inexpensively to a range of scaffolding materials to yield lightweight porous materials with a great potential for use in the building industry in heat and sound insulation panels, an alternative to aerated concretes, lightweight building blocks, porous rubber substitutes and foam shock absorbers.

Journal Article Type Article
Publication Date 2012-04
Journal MATERIALS RESEARCH BULLETIN
Print ISSN 0025-5408
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 47
Issue 4
Pages 980-986
APA6 Citation Rutkevicius, M., Munusami, S. K., Watson, Z., Field, A. D., Salt, M., Stoyanov, S. D., …Paunov, V. N. (2012). Fabrication of novel lightweight composites by a hydrogel templating technique. Materials research bulletin, 47(4), 980-986. https://doi.org/10.1016/j.materresbull.2012.01.014
DOI https://doi.org/10.1016/j.materresbull.2012.01.014
Keywords Microporous materials; Composites; Sol-gel chemistry; Microstructure; Mechanical properties
Publisher URL https://www.sciencedirect.com/science/article/pii/S0025540812000256?via%3Dihub
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