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A new paper reports on the use of functional nano-silicon dioxide as a non-leaching biocide.
-based coatings are sensitive to humidity and susceptible to microorganisms. In order to prevent aesthetic biological deterioration, the use of biological
. Some of these killers leach out of the paint film during aging. Now, researchers are using nano-silicon dioxide (NS) in commercial water-based coatings and nano-silicon dioxide and silicon powder (SF) modified for nitrophenol (PNP-NS) as antibacterial agents, which account for 0.5-2.5% of the total solid content of the coating.
Improved Properties
observed that 2% PNP-NS improved antifellal properties by 100% and 13%, respectively, compared to controlled samples and commercially available antifellal coatings, while antibacterial properties increased by 50% and 19%, respectively. Algae deface testing has shown that coatings that use PNP-NS coatings have an advantage over coatings that use NS, SF and commercially available antifellal coatings.
X-cut adhesion, hardness, opacity and water resistance of dry paint after application. Additives up to 2% NS and PNP-NS have little effect on the viscosity and opacity of the paint film. The use of NS and PNP-NS can improve X-cut adhesion, hardness and water resistance.
this study shows that NS and PNP-NS are good additives to improve the antificial and antibacterial properties of water-based commercial coatings.
the study was published in May 2020 in volume 142 of Organic Coatings Progress.
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