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Title: The heterogeneous ice nucleation properties of structured and chemically tailored surfaces for the development of novel anti-icing materials
Author: Charpentier , Thibaut V. J.
Awarding Body: University of Leeds
Current Institution: University of Leeds
Date of Award: 2012
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Preventing icing occurring in installations is an important challenge for many industries such as aviation, civil construction, high power transmission systems, or air-conditioning industries. Ice accretion costs money by reducing the efficiency of systems, and can, under some conditions, be a major hazard that could cost human lives. The most popular de-icing chemicals currently used (salts or glycol) are effective and relatively cheap; however they are hazardous to the environment and the waste treatment disposal can be expensive and time consuming. Another alternative is to turn to surface engineering - this is a popular approach in the control of anti-fouling but only few attempts have been made to use it for the purpose of ice prevention. It is fair to say that there is potential for more widespread studies and exploitation of such systems. Biomimetics, which is the study of the structure and function of biological systems as models for the design of new materials, is receiving great interest in the field of surface engineering. In the present work, natural antifreeze proteins and eight bio-inspired synthetic polymers have been grafted onto aluminium surfaces.: Also, a hydrophobic polymer and two anionic polyelectrolytes have been grafted onto textured hydrophobic stainless steel samples. The resulting functionalized surfaces have been characterized by contact angle measurements, secondary ions mass spectrometry and Fourier transform infrared spectroscopy. A custom freezing rig was built and the anti-icing performances of the different surfaces were investigated by monitoring the freezing temperature of slowly cooled water drops. Last but not least, suggestions regarding the anti-icing properties and mechanism of action of the studied functionalized surfaces have been proposed in the scope of classical nucleation theory.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available