Bionanomaterials: Thermal Stability of the Oleic Acid / alpha- and beta-cyclodextrin Complexes

This paper presents the thermal stability of the oleic acid encapsulated in a- and b - cyclodextrin. The complexation of the oleic acid was achieved by the ethanol-water solution method and the nanoparticles were analyzed by DSC. The free oleic acid and the encapsulated one were subjected to the thermal degradation in the range of 50-150�C and the degradation products were identified and quantified by GC-MS analysis of the fatty acid esters obtained by deriving with methanol/boron trifluoride, both for free compounds and for the encapsulated ones. The oleic acid complexes were very stable in this range of temperature.

Download Full-text

Formation of 3-MCPD Fatty Acid Esters from Monostearoyl Glycerol and the Thermal Stability of 3-MCPD Monoesters

Journal of Agricultural and Food Chemistry ◽

10.1021/acs.jafc.6b04048 ◽

2016 ◽

Vol 64 (46) ◽

pp. 8918-8926 ◽

Cited By ~ 12

Author(s):

Yue Zhao ◽

Yaqiong Zhang ◽

Zhongfei Zhang ◽

Jie Liu ◽

Yi-Lin Wang ◽

...

Keyword(s):

Thermal Stability ◽

Fatty Acid ◽

Fatty Acid Esters ◽

Thermal Stability Of ◽

Acid Esters

Download Full-text

Polystyrene/Montmorillonite Nanocomposites: Study of the Morphology and Effects of Sonication Time on Thermal Stability

Journal of Nanomaterials ◽

10.1155/2013/650725 ◽

2013 ◽

Vol 2013 ◽

pp. 1-12 ◽

Cited By ~ 20

Author(s):

Mashael Alshabanat ◽

Amal Al-Arrash ◽

Waffa Mekhamer

Keyword(s):

Electron Microscopy ◽

Thermal Stability ◽

Solution Method ◽

Sonication Time ◽

X Ray Diffraction ◽

Transmission Electron ◽

Polystyrene Matrix ◽

Before And After ◽

Silicate Layers ◽

Thermal Stability Of

Polymer nanocomposites of polystyrene matrix containing 10% wt of organo-montmorillonite (organo-MMT) were prepared using the solution method with sonication times of 0.5, 1, 1.5, and 2 hours. Cetyltrimethylammonium bromide (CTAB) is used to modify the montmorillonite clay after saturating its surface with Na+ions. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were used to characterize the montmorillonite before and after modification by CTAB. The prepared nanocomposites were characterized using the same analysis methods. These results confirm the intercalation of PS in the interlamellar spaces of organo-MMT with a very small quantity of exfoliation of the silicate layers within the PS matrix of all samples at all studied times of sonication. The thermal stability of the nanocomposites was measured using thermogravimetric analysis (TGA). The results show clear improvement, and the effects of sonication time are noted.

Download Full-text

Thermal Stability of Soybean Protein Isolate-Based Oleic Acid/Stearic Acid Blend Edible Films

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.469.171 ◽

2013 ◽

Vol 469 ◽

pp. 171-174 ◽

Cited By ~ 1

Author(s):

Ning Zhang ◽

Si Yao Sui ◽

Zhe Wang ◽

Zhong Su Ma

Keyword(s):

Thermal Stability ◽

Oleic Acid ◽

Stearic Acid ◽

Soybean Protein ◽

Soy Protein Isolate ◽

Edible Films ◽

Protein Isolate ◽

Soybean Protein Isolate ◽

The Matrix ◽

Thermal Stability Of

Edible films were prepared using soy protein isolate (4g/100g), oleic acid (0-2g/100g) and stearic acid (0-2g/100g). Effects of the type and ratio of fatty acids (oleic acid and stearic acid) on the thermal properties of soybean protein isolate-based films were investigated. The results indicated that the addition of oleic acid and stearic acid take a significant effect on the thermal stability of soybean protein isolate-based films, as may attribute to that oleic acid is an amphiphilic substance that interacts with both polar and hydrophobic sites on proteins, thus it could improve the functional properties of the films. Besides, the solid state and hydrophobic nature of stearic acid could help limit water diffusion in the matrix more efficiently when it is well-integrated in the matrix through the surfactant action of oleic acid.

Download Full-text

Synthesis of Stable Oil Dispersions of Silver Nanoparticles

Materials Science Forum ◽

10.4028/www.scientific.net/msf.694.73 ◽

2011 ◽

Vol 694 ◽

pp. 73-78

Author(s):

Dan Li

Keyword(s):

Thermal Stability ◽

Silver Nanoparticles ◽

Ascorbic Acid ◽

Spectral Analysis ◽

Oleic Acid ◽

Aqueous Medium ◽

Aqueous Phase ◽

Thermal Stability Of

Hydrophobic silver nanoparticles have been carried out by use of ascorbic acid in cyclohexylamine and aqueous medium. Nanosilver can be effectively coated with oleic acid and possesses oil-soluble property. Oleic acid as an extractant is also effective at stabilizing particles of similar size in an oil phase when the AgNO3 is reduced in a coexisting aqueous phase. Stable spherical silver nanoparticles 15~25 nm in diameter with a well-crystallized structure were obtained at 120 °C. The thermal stability of surface-coated silver prepared in cyclohexylamine solution was monitored by UV-vis spectral analysis.

Download Full-text