Calcium Soap Lubricants

• Published in: Chemical and Structure Modification of Polymers pp. 231 - 246
• Format: Book Chapter
• Language: English
• Published: United Kingdom Apple Academic Press 2015; Apple Academic Press, Incorporated
• Subjects: Materials science; Polymer chemistry; Optical Micrographs; STC; Sodium Stearate; Soap; Symmetric Methylene Stretching; Calcium Stearate; Zinc Borate; Lamellar Micelles; Wear Scar Diameter; CaSt2 Powder; Antisymmetric Stretching Bands; FTIR Spectrum; SEM Micrograph; Lubricating Oil; C16 C18 Alkyl Chain; FTIR Spectroscopy; Base Oil; Ball Tests; Stearic Acid; Friction Coefficient; Base; Metal Soaps; SEM; Pure; Spindle Oil
• ISBN: 9781771881227; 1771881224
• DOI: 10.1201/b19300-24

Abstract ... 205 18.1 Introduction ... 206 18.2 Materials and Methods ... 207 18.3 Results and Discussion ... 210 18.4 Conclusion ... 217 Acknowledgements ... 218 Keywords ... 218 References ... 218ABSTRACTThe preparation and characterization of calcium stearate (CaSt2) and a lubricant by using calcium stearate were aimed at in this study. Calcium stearate powder was prepared from sodium stearate and calcium chloride by precipitation from aqueous solutions. CaSt2 and the Light Neutral Base oil were mixed together to obtain lubricating oil. It was found that CaSt2 had a melting temperature of 142.8°C and in base oil it had a lower melting point, above 128°C. It was dispersed as lamellar micelles as the optical micrographs had shown. From rate of settling the size of dispersedparticles were found to be 1.88 µm and 0.11 µm for lubricants having 1% and 2% CaSt2, respectively. The friction coefficient and wear scar diameter of base oil 0.099 and 1402 nm were reduced to 0.0730 and 627.61 nm, respectively, for the lubricant having 1% CaSt2. Lower wear scar diameter (540 nm) was obtained for lubricant with 2% CaSt2. CaSt2 improved the lubricating property of the base oil but did not improve its oxidative and thermal stability.