stearates has been researched along with stearyl-stearate* in 3 studies
3 other study(ies) available for stearates and stearyl-stearate
| Article | Year |
|---|---|
Assessing the biodegradability of microparticles disposed down the drain.
Microparticles made from naturally occurring materials or biodegradable plastics such as poly(3-hydroxy butyrate)-co-(3-hydroxy valerate), PHBV, are being evaluated as alternatives to microplastics in personal care product applications but limited data is available on their ultimate biodegradability (mineralization) in down the drain environmental compartments. An OECD 301B Ready Biodegradation Test was used to quantify ultimate biodegradability of microparticles made of PHBV foam, jojoba wax, beeswax, rice bran wax, stearyl stearate, blueberry seeds and walnut shells. PHBV polymer was ready biodegradable reaching 65.4 ± 4.1% evolved CO Topics: Biodegradation, Environmental; Blueberry Plants; Models, Theoretical; Plastics; Polyesters; Seeds; Sewage; Stearates; Wastewater; Water Pollutants, Chemical; Waxes | 2017 |
Phase behaviour of oleanolic acid/stearyl stearate binary mixtures in bulk and at the air-water interface.
The solid-liquid phase behaviour of oleanolic acid (OLA)/stearyl stearate (SS) was investigated by differential scanning calorimetry and polarizing optical microscopy. A eutectic type diagram, with the eutectic composition close to pure SS was obtained. Complementary studies by NMR, X-ray diffraction (XRD) and diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy were performed. A mutual influence was detected in mixtures: the low melting form of SS is favoured at low OLA molar fractions (X(OLA)) and spherulitic structures appear at high X(OLA) and high temperature. Additionally, H-bonding between OLA carbonyl groups increases in the presence of SS. The study of OLA/SS by the Langmuir method and Brewster angle microscopy revealed the organization at the air-water interface: OLA interacts with water in the first layer, while SS is completely segregated to the upper layer for X(OLA)>0.3, and it distributes in the first and upper layers for X(OLA)<0.3. Topics: Air; Calorimetry, Differential Scanning; Hot Temperature; Oleanolic Acid; Phase Transition; Spectroscopy, Fourier Transform Infrared; Stearates; Thermodynamics; Water; Waxes; X-Ray Diffraction | 2009 |
Phase behaviour of binary mixtures involving tristearin, stearyl stearate and stearic acid: thermodynamic study and BAM observation at the air-water interface and AFM analysis of LB films.
The binary mixtures involving tristearin (TS), stearyl stearate (SS) and stearic acid (SA) were studied by surface pressure-area (pi-A) measurements and by Brewster angle microscopy (BAM), at the air-water interface, and the Langmuir-Blodgett (LB) monolayers, transferred onto mica substrates, were analysed by AFM. The thermodynamic analysis indicated miscibility in the whole composition range for the system SA/TS, and partial miscibility for systems SA/SS and TS/SS. This behaviour was further confirmed by BAM observation and AFM analysis of LB films. The AFM imaging of collapsed monolayers revealed domains with a multilayered structure varying with system and composition. The layers thickness determined by cross section analysis are consistent with estimated molecular lengths and conformations proposed for the molecules, assuming nearly perpendicular or tilted orientations of the hydrocarbon chains to the interface. Topics: Lipid Bilayers; Microscopy; Microscopy, Atomic Force; Phase Transition; Stearates; Stearic Acids; Surface Properties; Thermodynamics; Triglycerides; Waxes | 2008 |