Tribological characterization of environmentally adapted ester based fluids

Powerplant Lubricant Selection for Improved Efficiency and Environmental Impact Reduction

“…The temperature increase, ∆T , between the bath and the maximum temperature is assumed to be the same for the lubricants as losses are assumed to be equal in the loaded portion of the bearing. This is not entirely correct as in the experimental work, it was found that synthetic lubricants had a smaller ∆T which was partly due to the difference in specific heat capacity, ρC P , of the lubricants; synthetic esters have slightly higher ρC P than mineral oils, Pettersson [19]. Given equivalent losses developed in the oil film, the lubricant with higher ρC P experiences lower ∆T .…”

Green Tribology for the Sustainable Engineering of the Future

“…Green tribology was only defined as a scientific term in 2009 [14]. When we look at the content in publications dealing with green tribology, it turns out that they mainly describe what green-tribology research means [15], present some individual green-tribology goals or individual green-tribology principles, which are not entirely generalized [15], and describe the areas in which green tribology can be achieved [16] and [17], and in which applications it can be employed [16]. From an engineer's perspective, as someone who tends to employ or design a green tribological system, the term green tribology has tended to be used in the context of three principal thematics: biodegradable lubricants, biomimetic surfaces and green technologies such as wind turbines or tidal electric generators, etc.…”

“…However, biodegradable oils have already been used to reduce pollution for decades. Many studies [17] and [24], products [25] and [26] and legislation requirements [27] and [28] have already been developed. Accordingly, biodegradable lubrication is not a "new" concept of green tribology itself.…”

Ultralow Friction of a Tetrahedral Amorphous Carbon Film Lubricated with an Environmentally Friendly Ester-Based Oil

“…Therefore, there has been an increasing demand for ''green'' lubricants [8]. Among commonly used industrial lubricants, ester-based oils are good alternatives to mineral oils owing to their non-toxic and readily biodegradable nature, as well as good tribological performances [8,9]. Moreover, ester-based oils exhibit better tribological properties than non-polar lubricants on ferrous surfaces [10].…”