Effect of turmeric oil and halloysite nano clay as anti-oxidant and anti-wear additives in rice bran oil

Abstract

Mineral oils, which are mainly used as lubricant base oils in industries and automobiles, are non-bio degradable, toxic and cause harm to our environment. A large quantity of the lubricants, approximately 150 million barrels are used per year. In order to tackle the adverse effects of mineral oils on the environment, an idea emerged to replace mineral oils with an environmentally friendly bio lubricant. Vegetable oils having good lubricating properties, biodegradability and non-toxicity became the forerunners in these new bio lubricant formulation methods. In this paper, physical, chemical, tribological properties and oxidative stability of rice bran oil with two non-toxic additives, namely turmeric oil and halloysite nano clay, were evaluated. The gas chromatography method was used for structure elucidation. The tribological properties were evaluated by a four-ball apparatus as per ASTM D4172-94. Rice bran oil with 0.1% halloysite nano clay and 1.5% turmeric oil has shown 16.1% and 13.4% reduction in coefficient of friction and wear scar diameter, respectively, whereas the acid and peroxide value has reduced to 49% and 52%, respectively, when compared with the pure rice bran oil. The effect of turmeric oil in rice bran oil was evaluated using DFT-based quantum chemical studies using Gaussian 09, and it was found that the curcumin, which is the major component of turmeric oil, has shown good anti-oxidant behaviour. The properties of rice bran oil were observed to increase at a synergic combination of turmeric oil and halloysite nano clay.

Friction and wear improvement by using Curcumin as a natural additive in green lubricants

“…The improvement in the friction and wear behavior observed on samples lubricated with curcumin may be due to the presence of the phenolic OH groups, which allow adhering strongly to the metal surfaces creating a low-shear interfacial layer to reduce direct contact and facilitate sliding. 14…”

“…The improvement in the friction and wear behavior observed on samples lubricated with curcumin may be due to the presence of the phenolic OH groups, which allow adhering strongly to the metal surfaces creating a low-shear interfacial layer to reduce direct contact and facilitate sliding. 14 Table 2 shows a comparison of the tribological performance of curcumin with that of other additives recently reported. Only the percentage reduction in friction and wear of other additives in castor oil tested under the same tribological conditions of this work is exhibited.…”

“…The author reported significant enhancements in all the studied properties when curcumin was added. More recently, E. Sneha et al (2020) 14 introduced the use of turmeric derivatives as lubricant additives. They evaluated the friction behavior of turmeric oil as a natural antioxidant in rice bran oil by the four-ball test method at a temperature of 75 °C for 60 min.…”

Influence of cold plasma and ultrasonication on the extraction efficiency and quality of oil from milk thistle seeds (Silybum marianum L)

“…Oil oxidation test was conducted according to AOCS Cd-12-57 standard. Brie y, 3 mL of oil was dispersed in 60 mL distilled water and exposed to hot air (110°C for 30 min) and the oxidative stability was measured for about 13 h by a Rancimat (Metron 743, Switzerland) (Sneha et al, 2021).…”

Influence of grease formulation parameters on the tribological property of rice bran oil based lubricating grease

“…It can be considered as a potential base stock for lubricant because of its availability and superior lubricant properties over other vegetable oils (Rani et al, 2015a). It was observed that certain lubricant properties of RBO have been enhanced by using various additives and chemical modification (Rani et al,, 2015b; Sneha et al, 2020; Thampi et al, 2020). The most commonly used thickeners are lithium complex soap.…”