Influence of different silicone oils on properties of MWCNTs-OH/PDMS coatings

Abstract

To research the influence of different silicone oil on the properties of the coatings based on polydimethylsiloxane (PDMS) reinforced by hydroxylated multi-walled carbon nanotubes, phenylmethyl silicone oil (PSO), methyl silicone oil (MSO), and the blend of PSO and MSO were incorporated into the antifouling coatings. The surface properties and leaching of silicone oil were investigated by water and diiodomethane contact angle and confocal laser scanning microscopy (CLSM). The mechanical properties were investigated by tensile test, and the antifouling properties were tested via bacterial biofilms and the diatom Navicula tenera adhesion. Results revealed that leaching rate, hydrophobicity, and surface free energy with coating with the blend of MSO and PSO (P/M-PDMS) was between those of the coating with PSO (PSO-PDMS) and coating with MSO (MSO-PDMS). P/M-PDMS was better than MSO-PDMS in resisting fouling organisms. P/M-PDMS prolonged the leaching process of the blend of MSO and PSO and showed better antifouling performance.

Preparation of g-C3N4/TNTs/CNTs Photocatalytic Composite Powder and Its Enhancement of Antifouling Performance of Polydimethylsiloxane Coatings

“…The measured WCA and SE of each coating are shown in Figure 6. The WCA of the coating with composite powder is about 105° and about 3° higher than that of the P. The WCA results are similar to those reported in the literature, and the addition of nano-powders can slightly improve the hydrophobicity of the coating [7,32]. This is because when the amount of nano-powder added is small, the PDMS in the coating can completely wrap the powder inside the coating.…”