Structuring and Stability of Biopolymer‐Thickened Greases: Macromolecular Design for Sustainable Lubrication

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Greases thickened with polypropylene reached NLGI Grade 1, indicating firm stability and less fluidity.
Oil bleeding was notably low for polypropylene samples, at 7%, contrasted with over 18% for chitosan and cellulose.
Using standardized ASTM procedures, castor oil-based lubricants were tested for consistency, bleeding, and separation.
The research highlights the importance of polymer compatibility and structuring in creating effective biodegradable greases.

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This study evaluates the stability of biopolymer-thickened greases, showing polypropylene offers better stability and performance.

Mohd Aizudin Abd Aziz (2025) studied this question.

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