Chemical enrichment of conjugated linoleic acid in cottonseed oil using ruthenium nanoparticle immobilized on chemically modified multiwalled carbon nanotube as heterogeneous nanocatalyst
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引用次数: 0
Abstract
Conjugated linoleic acid (CLA) has a variety of health-promoting biological activities, and thus has a great potential as dietary supplement in functional foods. In our work, the effects of surface modifications of multiwalled carbon nanotubes (MWCNTs) support on the catalytic efficiency and selectivity of supported Ru catalysts for linoleic acid (LA) to CLA, as well as their influence mechanisms were well investigated. The results showed that the CLA yields for Ru/MWCNTs-OH (36.45%) and Ru/MWCNTs-COOH (31.06%) were significantly higher than that for Ru/MWCNTs (23.94%). This indicated that hydroxylated and carboxylated surface modification of MWCNTs could improve the catalytic activity of Ru. The CLA selectivity of Ru/MWCNTs-N-Doped and Ru/MWCNTs-NH2 were up to 96.06% and 88.26%, respectively, and was also proved to be temperature and time dependent. TEM analysis indicated Ru nanoparticles were evenly attached on the surface of mMWCNTs but have little agglomeration on MWCNTs, and their particle sizes are negatively related to the catalytic efficiency. Further catalyst characterization by XPS demonstrated that high CLA selectivity of Ru/MWCNTs-N-Doped and Ru/MWCNTs-NH2 were attributed to the high Ru (IV) content on the surface of supports. Thus, the mMWCNTs were proved to be the excellent support of Ru catalyst for high isomerization selectivity towards CLA formation.
期刊介绍：
The Journal of the American Oil Chemists’ Society (JAOCS) is an international peer-reviewed journal that publishes significant original scientific research and technological advances on fats, oils, oilseed proteins, and related materials through original research articles, invited reviews, short communications, and letters to the editor. We seek to publish reports that will significantly advance scientific understanding through hypothesis driven research, innovations, and important new information pertaining to analysis, properties, processing, products, and applications of these food and industrial resources. Breakthroughs in food science and technology, biotechnology (including genomics, biomechanisms, biocatalysis and bioprocessing), and industrial products and applications are particularly appropriate.
JAOCS also considers reports on the lipid composition of new, unique, and traditional sources of lipids that definitively address a research hypothesis and advances scientific understanding. However, the genus and species of the source must be verified by appropriate means of classification. In addition, the GPS location of the harvested materials and seed or vegetative samples should be deposited in an accredited germplasm repository. Compositional data suitable for Original Research Articles must embody replicated estimate of tissue constituents, such as oil, protein, carbohydrate, fatty acid, phospholipid, tocopherol, sterol, and carotenoid compositions. Other components unique to the specific plant or animal source may be reported. Furthermore, lipid composition papers should incorporate elements of yeartoyear, environmental, and/ or cultivar variations through use of appropriate statistical analyses.
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