U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

Derivatization of castor oil based estolide esters: Preparation of epoxides and cyclic carbonates

Author:
Doll, Kenneth M., Cermak, Steven C., Kenar, James A., Walter, Erin L., Isbell, Terry A.
Source:
Industrial crops and products 2017 v.104 pp. 269-277
ISSN:
0926-6690
Subject:
carbon dioxide, carbonates, castor oil, derivatization, epoxides, estolides, hydrogen peroxide, industrial applications, oleic acid, oxidation, temperature, tetrabutylammonium compounds, viscosity
Abstract:
Estolides that are based on castor oil and oleic acid are versatile starting points for the production of industrial fluids with new properties. A variety of unsaturated estolides were derivatized by epoxidation with hydrogen peroxide. The epoxidized estolides were further modified using supercritical carbon dioxide and tetrabutylammonium bromide to chemically incorporate carbon dioxide into the material yielding a 5-membered cyclic carbonate structure. These new epoxides and cyclic carbonates exhibited higher pour points, oxidation onset temperatures, and viscosities, compared to the corresponding unsaturated precursors. One derivative had a dynamic viscosity of ∼9000mPa s at 40°C, demonstrating potential for use in industrial applications.
Agid:
5684918
Handle:
10113/5684918