Original scientific paper

TRIBOLOGICAL PROPERTIES OF LUBRICANTS DERIVED FROM RENEWABLE RESOURCES

Boris Kržan
Jože Vižintin

Abstract

TRIBOLOGICAL PROPERTIES OF LUBRICANTS DERIVED FROM RENEWABLE RESOURCES
Abstract
Vegetable oils and animal fats have been used as lubricants for many years. With the discovery of petroleum and the availability of inexpensive oils, alternatives became unattractive and were left by the wayside. In recent years, the increased public attention and the awareness of environment protection have stimulated the development of a vide variety of lubricants that are readily biodegradable in terms of one of the several internationally recognized test methods, and that have a low toxicity toward water organisms. The most important base stocks for environmentally adapted lubricants formulations are vegetable oils as well as modified vegetable oil esters.
In the present work, two typical esters and two formulations made from ester oil base along with a unique blend of additives were investigated with respect to their oxidative stability, and tribological behavior. Even mineral oil and synthetic ester containing fully saturated fatty acids have proven to be more stable against oxidative attack, unsaturated ester formulation exhibit better tribology performance at moderate loads. Results suggest that it is possible to combine high renewability and high technical performance, which should benefit the world’s environment, the agricultural community and the consumer.

Keywords

semisynthetic vegetable base lubricating oil; vegetable oils, fats, waxes; as base material; semisynthetic esther base lubricating oil; lubricating oil application properties; friction and wear testing; comparative evaluation

Hrčak ID:

6534

URI

https://hrcak.srce.hr/6534

Publication date:

31.10.2006.

Article data in other languages: croatian

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