Silicone oil CAS No. 63148-62-9

Silicone oil has low viscosity, excellent chemical stability, and thermal stability within a wide temperature range. ^[1] Silicone oil has been used in ophthalmic surgery for many years, starting in the 1960s. It is used to tamponade the vitreous chamber. Over the years it has progressively gained importance in retinal surgery due to its desirable physical and chemical properties. It is commonly used in vitrectomies in patients with rhegmatogenous retinal detachment, retinal detachment with proliferative vitreoretinopathy, proliferative diabetic retinopathy and ocular trauma. Compared with gas, it provides faster visual acuity rehabilitation and greater independence regarding the recommended posttreatment position for the patient, which is especially important in cases of noncompliance. Moreover, in many cases a longer tamponade time is desirable. ^[2]

Silicone oil impregnation of the hard porous oxide layer resulting from PEO treatment and its heat treatment creates PDMS-SAM on the oxide surface, creating a water-repellent surface with significantly enhanced mobility of water droplets on the Al alloy surface. Such water repellency inhibits the absorption and penetration of corrosive media via pores and cracks, which are critical defects of oxide layers formed via PEO; thereby, the corrosion resistance of the PEO-treated Al alloy significantly improved through silicone oil impregnation and its heat treatment. The silicone oil within the porous oxide layer provides a lubrication effect under wear and abrasion conditions; thus, the surface has a significantly enhanced wear resistance. Moreover, because the PDMS monolayer can be regenerated on the surface of an oxide, the silicone-oil-impregnated porous oxide surface is tolerant to physical damage. [3]

[1] Yufen Chen et al. "A novel lauric acid in silicone oil phase change emulsion with enhanced thermal properties and stability prepared by emulsion inversion point method", Solar Energy Materials and Solar Cells, Volume 271, 1 July 2024, 112855;

[2] Małgorzata Łątkowska et al. "Emulsification of Silicone Oils: Altering Factors and Possible Complications—A Narrative Review", J. Clin. Med. 2024, 13(8), 2407;

[3] Yeji Shin et al. "Healable Anti-Corrosive and Wear-Resistant Silicone-Oil-Impregnated Porous Oxide Layer of Aluminum Alloy by Plasma Electrolytic Oxidation", Nanomaterials 2023, 13(18), 2582;

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