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Influence of grease formulation parameters on the tribological property of rice bran oil based lubricating grease
Author(s) -
Thampi Ananthan D.,
Alokkan Deepkant,
Biju Gokul,
Sasidharan Baiju,
Rani Santhakumari
Publication year - 2021
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1002/aocs.12508
Subject(s) - grease , rice bran oil , materials science , tribology , penetrometer , acid value , stearic acid , base oil , composite material , wax , bran , chemical engineering , raw material , chemistry , organic chemistry , environmental science , scanning electron microscope , soil science , engineering , soil water
The negative environmental impacts and depletion of resources caused due to the excess usage of petroleum based products made researchers to think about an alternative biodegradable product. In the present study, rice bran oil (RBO) was used as a base oil for formulating 16 different grease samples. The thickener used was generated in situ by mixing 12‐hydroxy stearic acid (12 HSA) to calcium hydroxide at a different ratio from 1.25 to 2. The formulation parameters such as weight % of thickener, saponification time, and maximum temperature spanned the ranges 5–11 wt.%, 1–2.5 h, and 150–180°C, respectively. The tribological properties such as wear scar diameter (WSD) and friction of 16 different grease samples formulated by varying these parameters were evaluated using a standard four‐ball tester as per ASTM standards. The grease samples were characterized by evaluating the penetration value using a standard cone penetrometer. The influence of these formulation parameters on the experimentally evaluated properties was also examined in this work. The results indicated that the variation of these parameters during grease formulation has a significant influence on the evaluated properties.