Next Article in Journal
Acknowledgement to Reviewers of Gels in 2017
Next Article in Special Issue
Clay-Facilitated Aqueous Dispersion of Graphite and Poly(vinyl alcohol) Aerogels Filled with Binary Nanofillers
Previous Article in Journal / Special Issue
Kinetics of Supercritical Drying of Gels
Article Menu
Issue 1 (March) cover image

Export Article

Open AccessArticle

Enhancement Studies on Manufacturing and Properties of Novel Silica Aerogel Composites

School of Mechanical and Aerospace Engineering, Aerospace Engineering cluster, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
*
Author to whom correspondence should be addressed.
Received: 29 November 2017 / Revised: 2 January 2018 / Accepted: 5 January 2018 / Published: 7 January 2018
(This article belongs to the Special Issue Aerogels 2018)
Full-Text   |   PDF [3673 KB, uploaded 9 January 2018]   |  

Abstract

Silica Aerogel composites are ultra-low density, highly porous foam-like materials that exhibit excellent thermal insulation and high strain recovery characteristics. In the present work, environment-friendly silica aerogel composites are fabricated using silica aerogel granules with bio based porcine-gelatin as the binding agent dissolved in water and by further drying the mix at sub-zero condition. This article focuses on improvement studies carried on the mold design and the manufacturing process to achieve better geometric compliance for the silica aerogel composites. It also presents contact angle measurements, compressive behavior under different cycles of loading, time dependent behavior and flexural response of the composites. The influence of additives, such as fumed silica and carbon nanotubes on mechanical properties of the composites is also deliberated. Water droplet contact angle experiments confirmed the ultra-hydrophobic nature of the composites. The mechanical properties were characterized under cyclic loading-unloading compression and three-point flexure tests. On successive compression in three consecutive load cycles, the strain and thickness recovery were found to decrease by around 30%. The flexural properties of the aerogel composites were investigated using it as the core covered by thin carbon composite face sheets. It was found that the flexural strength and the failure strain of this aerogel sandwich composites is approximately half of the conventional nomex honeycomb sandwich equivalent. View Full-Text
Keywords: aerogel composites; mechanical characterization; sandwich design; cyclic loading aerogel composites; mechanical characterization; sandwich design; cyclic loading
Figures

Graphical abstract

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

Share & Cite This Article

MDPI and ACS Style

Joshi, S.C.; Manikandan, P.; Jothi, Y. Enhancement Studies on Manufacturing and Properties of Novel Silica Aerogel Composites. Gels 2018, 4, 5.

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