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Factors affecting the wettability of different surface materials with vegetable oil at high temperatures and its relation to cleanability. / Ashokkumar, Saranya; Adler-Nissen, Jens; Møller, Per.

In: Applied Surface Science, Vol. 263, 2012, p. 86-94.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Ashokkumar, Saranya; Adler-Nissen, Jens; Møller, Per / Factors affecting the wettability of different surface materials with vegetable oil at high temperatures and its relation to cleanability.

In: Applied Surface Science, Vol. 263, 2012, p. 86-94.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{d72f099381d0428faa773520c16bfb86,
title = "Factors affecting the wettability of different surface materials with vegetable oil at high temperatures and its relation to cleanability",
publisher = "Elsevier BV North-Holland",
author = "Saranya Ashokkumar and Jens Adler-Nissen and Per Møller",
year = "2012",
doi = "10.1016/j.apsusc.2012.09.002",
volume = "263",
pages = "86--94",
journal = "Applied Surface Science",
issn = "0169-4332",

}

RIS

TY - JOUR

T1 - Factors affecting the wettability of different surface materials with vegetable oil at high temperatures and its relation to cleanability

A1 - Ashokkumar,Saranya

A1 - Adler-Nissen,Jens

A1 - Møller,Per

AU - Ashokkumar,Saranya

AU - Adler-Nissen,Jens

AU - Møller,Per

PB - Elsevier BV North-Holland

PY - 2012

Y1 - 2012

N2 - The main aim of the work was to investigate the wettability of different surface materials with vegetable oil (olive oil) over the temperature range of 25–200°C to understand the differences in cleanability of different surfaces exposed to high temperatures in food processes. The different surface materials investigated include stainless steel (reference), PTFE (polytetrafluoroethylene), silicone, quasicrystalline (Al, Fe, Cr) and ceramic coatings: zirconium oxide (ZrO2), zirconium nitride (ZrN) and titanium aluminum nitride (TiAlN). The ceramic coatings were deposited on stainless steel with two different levels of roughness. The cosine of the contact angle of olive oil on different surface materials rises linearly with increasing temperature. Among the materials analyzed, polymers (PTFE, silicone) gave the lowest cosθ values. Studies of the effect of roughness and surface flaws on wettability revealed that the cosθ values increases with increasing roughness and surface flaws. Correlation analysis indicates that the measured contact angle values gave useful information for grouping easy-clean polymer materials from the other materials; for the latter group, there is no direct relation between contact angle and cleanability. In addition to surface wettability with oil many other factors such as roughness and surface defects play an essential role in determining their cleanability.

AB - The main aim of the work was to investigate the wettability of different surface materials with vegetable oil (olive oil) over the temperature range of 25–200°C to understand the differences in cleanability of different surfaces exposed to high temperatures in food processes. The different surface materials investigated include stainless steel (reference), PTFE (polytetrafluoroethylene), silicone, quasicrystalline (Al, Fe, Cr) and ceramic coatings: zirconium oxide (ZrO2), zirconium nitride (ZrN) and titanium aluminum nitride (TiAlN). The ceramic coatings were deposited on stainless steel with two different levels of roughness. The cosine of the contact angle of olive oil on different surface materials rises linearly with increasing temperature. Among the materials analyzed, polymers (PTFE, silicone) gave the lowest cosθ values. Studies of the effect of roughness and surface flaws on wettability revealed that the cosθ values increases with increasing roughness and surface flaws. Correlation analysis indicates that the measured contact angle values gave useful information for grouping easy-clean polymer materials from the other materials; for the latter group, there is no direct relation between contact angle and cleanability. In addition to surface wettability with oil many other factors such as roughness and surface defects play an essential role in determining their cleanability.

KW - Wettability

KW - Different surface materials

KW - Vegetable oil

KW - Cleanability

KW - High temperatures

KW - Roughness and surface defects

U2 - 10.1016/j.apsusc.2012.09.002

DO - 10.1016/j.apsusc.2012.09.002

JO - Applied Surface Science

JF - Applied Surface Science

SN - 0169-4332

VL - 263

SP - 86

EP - 94

ER -