An investigation of the Effects of Adsorbed Stearic and Oleic Acid on Hydrophobicity of Carbonyl Iron Particles
Volume Title: 1
Authors
1Transport Phenomena & Nanotechnology (TPNT) Lab., School of Chemical Engineering, College of Engineering, University of Tehran, Tehran ,Iran
21 Transport Phenomena & Nanotechnology (TPNT) Lab., School of Chemical Engineering, College of Engineering, University of Tehran, Tehran 111554563, Iran
32 Advanced Magnetic Materials Research Center, School of Metallurgy and Materials, College of Engineering, University of Tehran, Tehran 111554563, Iran
Abstract
The aim of this research is to evaluate the effects of adsorbed stearic acid and oleic acid on the hydrophobicity of carbonyl iron. For this purpose, particles of carbonyl iron coated with stearic acid and oleic acid were synthesized in a special chamber during six hours. The coated particles were taken at two different intervals (after 3 and 6 hours ). Then, the hydrophobicity of the prepared samples were compared with each other.The FESEM analysis was used to observe the surface modification of the particles. The contact angle of the modified particles were also measured. The results showed that the static contact angle for the carbonyl iron without any additive was zero, while the CIP@Stearic acid showed an excellent super hydrophobicity with static contact angle of 162.9°. The static contact angle for the CIP@Oleic acid, on the other hand, was 156.2°. Since hydrophobicity is an important feature for oil/water separation, obtaining high hydrophobicity of particles is considered as a remarkable achievement for the oil spills clean-up.
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