Next Article in Journal
Chitosan Microgels and Nanoparticles via Electrofluidodynamic Techniques for Biomedical Applications
Next Article in Special Issue
Synthesis of Porous and Mechanically Compliant Carbon Aerogels Using Conductive and Structural Additives
Previous Article in Journal / Special Issue
On the Road to Biopolymer Aerogels—Dealing with the Solvent
Article Menu

Export Article

Open AccessFeature PaperArticle
Gels 2016, 2(1), 1; doi:10.3390/gels2010001

From Fragile to Resilient Insulation: Synthesis and Characterization of Aramid-Honeycomb Reinforced Silica Aerogel Composite Materials

Institute of Materials Research, German Aerospace Center, Linder Hoehe, 51170 Cologne, Germany
*
Author to whom correspondence should be addressed.
Academic Editors: Francoise Quignard and Nathalie Tanchoux
Received: 27 October 2015 / Revised: 25 November 2015 / Accepted: 9 December 2015 / Published: 22 December 2015
(This article belongs to the Special Issue Aerogels)
View Full-Text   |   Download PDF [7030 KB, uploaded 23 December 2015]   |  

Abstract

The production of a new composite material embedding aramid honeycomb materials into nano-porous silica aerogels is studied. Our aim is to improve the poor mechanical strength of silica aerogels by aramid honeycombs without losing the amazing properties of the aerogels like little density and low thermal conductivity. The composite materials were prepared using two formulations of silica aerogels in combination with aramid honeycomb materials of different cell sizes. The silica aerogels are prepared using silicon alkoxides methyltrimethoxysilane and tetraethylorthosilicate as precursors in a two-step acid–base sol–gel process. Shortly in advance of the gelation point, the aramid honeycombs were fluted by the sol, gelation occurred and, after the aging process, the gel bodies were supercritically dried. The properties of the received composite materials are satisfying. Even the thermal conductivities and the densities are a bit higher than for pure aerogels. Most importantly, the mechanical strength is improved by a factor of 2.3 compared to aramid honeycomb materials and by a factor of 10 compared to the two silica aerogels themselves. The composite materials have a good prospective to be used as an impressive insulation material. View Full-Text
Keywords: fluffy silica aerogels; flexible silica aerogels; honeycomb-composite; thermal insulating; mechanical properties fluffy silica aerogels; flexible silica aerogels; honeycomb-composite; thermal insulating; mechanical properties
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Schwan, M.; Rößler, M.; Milow, B.; Ratke, L. From Fragile to Resilient Insulation: Synthesis and Characterization of Aramid-Honeycomb Reinforced Silica Aerogel Composite Materials. Gels 2016, 2, 1.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Gels EISSN 2310-2861 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top