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Recycled Cellulose Aerogels from Paper Waste for a Heat Insulation Design of Canteen Bottles

Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore
Department of Physiology, National University of Singapore, 2 Medical Drive, Singapore 117593, Singapore
Defence Medical and Environmental Research Institute, DSO National Laboratories, 27 Medical Drive, Singapore 117510, Singapore
Author to whom correspondence should be addressed.
Fluids 2019, 4(3), 174;
Received: 14 August 2019 / Revised: 10 September 2019 / Accepted: 16 September 2019 / Published: 18 September 2019
(This article belongs to the Special Issue Coupled Flow and Heat or Mass Transport)
Exercising in a tropical climate with constant high temperatures and high humidity increases the risk of heatstroke for active people who frequently train outdoors. For these active persons, a cooling source of water nearby can be essential, and this is usually carried in canteen bottles. However, commercially available water canteen bottles have limited thermal insulation capability to keep the liquid content cooled for the required period. This work proposed an engineering solution to enhance the heat insulation performance of water canteen bottles, using recycled cellulose aerogels made from paper waste for the first time as an insulating layer. Recycled cellulose aerogels wrapped around the water canteen bottle provides excellent thermal insulation performance, while not adding significant weight to the bottle. The temperature of the ice slurry in the canteen bottle was measured periodically over four hours with a mercury thermometer. The effects of the static and dynamic conditions on the temperature rate were also quantified. A 1.5 cm thickness of 1.0 wt.% recycled cellulose aerogel wrapped around the canteen bottle can provide an excellent thermal insulation performance with the lowest rise in temperature, achieving a low final temperature of the ice slurry content of 3.5 °C after 4 h. This result is much better than that provided by available commercial bottles under the same conditions. View Full-Text
Keywords: cellulose aerogel; heat insulation; water canteen bottle; dynamic movement cellulose aerogel; heat insulation; water canteen bottle; dynamic movement
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Wen Zhen, L.; Thai, Q.B.; Nguyen, T.X.; Le, D.K.; Kai Wei Lee, J.; Qing Xiang, Y.; Duong, H.M. Recycled Cellulose Aerogels from Paper Waste for a Heat Insulation Design of Canteen Bottles. Fluids 2019, 4, 174.

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