Fabrication of a silica aerogel and examination of its hydrophobic properties via contact angle and 3M water repellency tests

Javazmi, Leila and Khoddami, Akbar and Mazrouei-Sebdani, Zahra and Shams-Ghahfarokhi, Farzaneh and Low, Tobias (2017) Fabrication of a silica aerogel and examination of its hydrophobic properties via contact angle and 3M water repellency tests. In: 2017 5th International Conference on Nano and Materials Engineering (ICNME 2017), 1-3 April 2017, Bali, Indonesia.

Official URL: http://www.icnme.org/

Abstract

Aerogels are dry gels with a very high specific pore volume. Aerogels with increased hydrophobicity have significant potential to expand their use as lightweight materials. Considering its special nanostructure and exceptional properties, this paper focuses on the synthesis and hydrophobic evaluation of a silica aerogel. The structural properties were investigated by measuring density, SEM micrographs, and BET analyses. Also, the hydrophobic evaluation was carried out by measuring 3M water repellency and water/alcohol contact angle. The BET analysis showed successful synthesis of the nanoporous silica aerogel with a pore size of 24 nm and porosity of 89%. The synthesized aerogel showed 3M water repellency of 3 and water contact angle of 129.6˚. Also, it is worth-mentioning that as the alcohol content of the drops in 3M water repellency test is increased, the drop contact angle is decreased due to its lower surface tension. Thus, the contact angle reaches the zero at 3M water repellency test number of 4 (water/alcohol 60/40).


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Speech)
Refereed: Yes
Item Status: Live Archive
Additional Information: Accepted version embargoed until 1 June 2018 (12 months), in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 17 May 2017 00:38
Last Modified: 21 May 2018 23:20
Uncontrolled Keywords: silica aerogel, gel, contact angle, water/alcohol, 3M water repellency tests
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091299 Materials Engineering not elsewhere classified
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.1088/1757-899X/204/1/012014
URI: http://eprints.usq.edu.au/id/eprint/32380

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