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Sunday, 15 September 2019
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Raw materials & technologies, Technologies, Functional coatings

Phosphor layers benefit antifouling effectiveness of silicone elastomer coatings

Thursday, 6 June 2013

Silicone elastomer coatings are known as fouling-release coatings. Layers of phosphor powders on the coatings even promote antifouling effectiveness.

Phosphor layers prevent silicone elastomer coatings against fouling 

Source: Limnomar

Phosphor layers prevent silicone elastomer coatings against fouling 

Source: Limnomar

Researchers from the State Key Laboratory of Tribology at Tsinghua University in Beijing, China have prepared compound coatings based on silicone elastomer and various coloured glow-in-the-dark phosphor powders. In order to investigate the antifouling effectiveness of the coatings against the Navicula diatom, they analysed the initial settlement density and adhesion strength of the species on the coatings.

Phosphor layers prevent settlement of Navicula species diatom 

It was found that the settlement densities on samples with phosphor layers (diatom coverage area on Day 7 was ~30%) were significantly lower than those on samples without phosphor layers (coverage area was ~60%), while both coatings showed similar fouling-release characteristics (~90% of removal at wall shear stress value of 90 Pa). In addition, the phosphor colour played an important role in the diatom fouling activities.

These experimental phenomena were partly explained according to surface characteristics and previous studies on the relationship between diatom settlement and light conditions.

The study appeared in: Journal of Coatings Technology and Research, May 2013, Volume 10, Issue 3, pp 397-406.

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