NDLI: Thermal and rheological behavior of ecofriendly metal cutting fluids

Content Provider	Springer Nature Link
Author	Silva, Viviane F. Batista, Lucia N. De Robertis, Eveline Castro, Claudia S. C. Cunha, Valnei S. Costa, Marcos A. S.
Copyright Year	2015
Abstract	Metal cutting fluids (MCFs) or cutting fluids are widely applied industrial products traditionally based on hydrocarbons. However, hydrocarbon-based cutting fluids have low thermal stability and tend to vaporize during application, causing environmental and human health problems. One of the most promising cutting fluids is based on vegetable oils, due to the high level of biodegradability and low toxicity, although vegetable oils have unsaturations that reduce their oxidation stability. This work evaluated the thermal and rheological behaviors of two chemically modified cottonseed oils: epoxidized fluid and hydroxylated fluid, besides unmodified cottonseed oil and commercial cutting fluid. The thermogravimetric analysis showed that the commercial cutting fluid starts volatization at low temperature (100 °C) while all cutting fluid derivatives of cottonseed oil have thermal resistance higher than 300 °C under inert atmosphere. All cutting fluids had Newtonian behavior (power-law index = 1), with viscosity up to 0.12 ± 0.05 Pa s. The small differences indicate similar lubricity. As expected, the viscosity decreased with temperature for all fluids. The apparent activation energies decreased in the order commercial cutting fluid > epoxidized fluid > cottonseed oil > hydroxylated fluid. Lower apparent activation energy of hydroxylated fluid indicated better heat transfer of this fluid due to better convection. Real drilling experiments indicated lower tool wear with the use of the epoxidized fluid.
Starting Page	973
Ending Page	980
Page Count	8
File Format	PDF
ISSN	13886150
Journal	Journal of thermal analysis
Volume Number	123
Issue Number	2
e-ISSN	15882926
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-07-08
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cutting fluids Epoxidized fluid Hydroxylated fluid Thermogravimetry Cottonseed oil Physical Chemistry Analytical Chemistry Polymer Sciences Inorganic Chemistry Measurement Science and Instrumentation
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Condensed Matter Physics

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