کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6377533 | 1322212 | 2011 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Synthesis and physical properties of petroselinic based estolide esters Synthesis and physical properties of petroselinic based estolide esters](/preview/png/6377533.png)
A new series of petroselinic (Coriandrum sativum L.) based estolide 2-ethylhexyl (2-EH) esters were synthesized, as the capping material varied in length and in degrees of unsaturation, in a perchloric acid catalyzed one-pot process with the esterification process incorporated into an in situ second step to provide the coriander estolide 2-EH ester. The kinematic viscosities ranged from 53 to 75 cSt at 40 °C and 9.1 to 14.6 cSt at 100 °C with a viscosity index (VI) ranging from 151 to 165. The caprylic (C8) capped coriander estolide 2-EH ester had the lowest low-temperature properties (pour point = â33 °C and cloud point = â33 °C), while the coco-coriander estolide 2-EH ester produced an estolide with modest low-temperature properties (pour point = â24 °C and cloud point = â25 °C). The coco-coriander estolide 2-EH ester was explored for the ability to resist oxidative degradation with the use of an biodegradable additive package added in 1.5%, 3.5%, or 7.0% units based on weight. The oxidative stability increased as the amount of stability package increased (rotating pressurized vessel oxidation test (RPVOT) times 65-273 min). Along with expected good biodegradability, these coriander estolide 2-EH esters had acceptable properties that should provide a specialty niche in the U.S. as a biobased lubricant.
Journal: Industrial Crops and Products - Volume 33, Issue 1, January 2011, Pages 132-139