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Development of Oleogels Using Castor Oil Derivatives for Lubricating Greases

Posted on October 23, 2013 by admin

This blog post is an abstract of the research work focused on the development of new oleogels, using castor oil and cellulose derivatives, which could be potentially used as biodegradable lubricating greases

Thermal and thermo-rheological behaviours of castor oil and cellulose derivatives were characterised by means of TGA analysis and SAOS measurements, in order to evaluate the evolution of oleogel microstructure with temperature. Moreover, both roll-stability and leakage tendency standard tests, usually performed in the grease industry, were used to evaluate the mechanical resistance of each sample. The evolution of biogrease linear viscoelasticity functions with frequency is quite similar to that found for traditional lithium lubricating greases. However, the influence of temperature on biogreases linear viscoelasticity functions is less important than that found for traditional greases. In general, the biogrease samples studied show both slightly lower mechanical stability and higher leakage tendency than traditional lubricating greases. The use of a blend of ethyl and methyl cellulose as thickener provides a mechanical stability comparable to that found for commercial greases.

Read:http://pubs.rsc.org/en/Content/ArticleLanding/2009/GC/b820547g#!divAbstract

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