Green Tribology by Michael Nosonovsky & Bharat Bhushan

Author:Michael Nosonovsky & Bharat Bhushan
Language: eng
Format: epub
Publisher: Springer Berlin Heidelberg, Berlin, Heidelberg

Fatty acid name

Fatty acid composition of common sunflower oil (in %)

Fatty acid composition of high oleic sunflower oil (in %)

Fatty acid composition of high oleic high palmitoleic sunflower oil (in %)

Palmitic acid

6.0–8.0

4.7

25.50

Palmitoleic acid

–

7.3

Stearic acid

1.5–3.0

3.7

1.9

Oleic acid

23–28

72.2

59.7

Linoleic acid

60–68

17.0

2.2

Linolenic acid

–

–

–

Others

1

2

–

Experimental results from Krzan et al. showed that high oleic sunflower oil recorded lesser coefficient of friction than mineral-based oil but promoted higher wear scar diameter. Gear protection properties of sunflower oil are better or equivalent to mineral-based oils. Sunflower oil was stable during spur gear test system test for about 700 h of working and no excessive wear was observed which indicates effective lubrication in the gear box maintained during operation. The presence of tocopherols improves the oxidation stability of unrefined sunflower oil as compared to refined sunflower oils. The addition of ascorbic acid to refined sunflower oil improves its stability by about 2% [30]. Cultivation of high oleic sunflower oil cultivar, a variation in genotype can improve the thermal and oxidation stability of sunflower oils [31].

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