The aim of this research was to study the biodegradation of a polymer derived from castor oil, which is a renewable, natural material that is a practical alternative for the replacement of traditional polyurethane foams. Due to its molecular structure, which contains polyester segments derived from vegetable oil, the polymeric surface is susceptible to microorganism attack. This study tested th...

Greases with two different thickeners, namely lithium complex (LiX) and polypropylene (PP), three base oil viscosities were investigated in fretting varying displacement amplitude applied normal load. The material combinations silver-coated copper/silver-coated copper (Ag/Cu vs Ag/Cu) steel/steel investigated. Fretting maps of four the six evaluated greases constructed as a tool to better under...

The tribological behavior of novel 7.5 wt% carbon nanotube-based lubricant greases in PAO (polyalphaolefin) oil with and without 1.0 MoS2, together several other commercial such as calcium, lithium, were studied. test results showed a marked reduction frictional coefficient achieved by the CNTs based grease samples an average benefit around 30% compared to conventional greases. steady state und...

Fats, oils and greases in waste water frequently cause serious environmental problems. A commercial preparation was tested for its ability to degrade oil grease wastewater. As substrates, two fats (lard beef fat) four (rape seed oil, sunflower palm olive oil) were chosen. The degradation of different substrates investigated by the determination lipid at pH 7, temperature 25 °C, aerobic conditio...