Abstract
The new generation of cutting fluids should have some characteristics, such as low toxicity and biodegradability. A bio-cutting fluid emulsion are an excellent option because they present those properties, as well as good mechanical performance. The present study aims to investigate the lubricity of O/W emulsions (cutting fluid emulsion), varying the concentration of anionic surfactant (1%, 2.5% and 5%) and epoxidized oil (5%, 10%, 15%, 20% e 25%). A sunflower oil was chemically modified by epoxidation reaction, then its viscosity, iodine and oxirane index, density, and acidity were characterized. The performances of the emulsions were evaluated using a tribometer HFRR (High Frequency Reciprocating Rig), under hydrodynamic lubrication conditions. The ball wear scars were analyzed using an optical microscopy. The results showed that a low concentration of surfactant promote friction and wear reduction. Based on the tribological performance, the emulsions with 5% and 10% of epoxidized oil are more suitable.
Highlights
Cutting fluids are classified as straight, synthetic, semisynthetic and soluble oils
The main negative effects of petroleum based lubricants are linked to environmental problems generated from their inappropriate use, contaminating surface water, groundwater, air, soil, and agricultural products, including food 2
Vegetable oils have most of the desirable lubrication properties, great lubricants must have low volatility, high viscosity index, easy miscibility with other fluids, reduced toxicity and better performance[5]
Summary
Cutting fluids are classified as straight, synthetic, semisynthetic and soluble oils. The main negative effects of petroleum based lubricants are linked to environmental problems generated from their inappropriate use, contaminating surface water, groundwater, air, soil, and agricultural products, including food 2. Despite their widespread use, operators can develop serious health problems such as lung cancer, respiratory and dermatological diseases[3]. Operators can develop serious health problems such as lung cancer, respiratory and dermatological diseases[3] It has been notice a growing interest in development of environmentally friendly cutting fluids. A high degree of multiple unsaturation of C-C in the fatty acid chain of many vegetable oils is responsible for its low temperature and low oxidative stability, which restricts their use as lubricants at a modest temperature range[6]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
