Synthesis of Stable Oil Dispersions of Silver Nanoparticles

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.

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

2008 ◽  
Vol 59 (9) ◽  
Author(s):  
Daniel I. Hadaruga ◽  
Nicoleta G. Hadaruga ◽  
Anca Hermenean ◽  
Adrian Rivis ◽  
Vasile Paslaru ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Oleic Acid ◽  
Solution Method ◽  
Degradation Products ◽  
Water Solution ◽  
Fatty Acid Esters ◽  
Cyclodextrin Complexes ◽  
Free Oleic Acid ◽  
Thermal Stability Of ◽  
Acid Esters

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.

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

2013 ◽  
Vol 469 ◽  
pp. 171-174 ◽  
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.

Characterization of PET-Silver Nanocomposite Filaments

2018 ◽  
Vol 930 ◽  
pp. 224-229
Author(s):  
Marcos Antônio Guerra ◽  
Jeferson Prado Swerts ◽  
Mei Abe Funcia ◽  
Neide Aparecida Mariano ◽  
Maria Gabriela Nogueira Campos
Keyword(s):  
Electron Microscopy ◽  
Thermal Stability ◽  
Scanning Electron Microscopy ◽  
Silver Nanoparticles ◽  
Addition Method ◽  
X Ray ◽  
Silver Nanocomposite ◽  
Thermal Stability Of ◽  
Scanning Electron

Polyethylene terephthalate (PET) fiber is a very versatile fiber that can be produced with different properties, such as antimicrobial activity. This study aims to synthesize antimicrobial PET filaments incorporated with silver nanoparticles immobilized in silica (NPAg-Si) by bulk additive method. Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray (EDX) characterized the obtained filaments at concentrations (w/w) of 0.008%, 0.016%, 0.032%, 0.047% and 0.063% NPAg-Si, in order to identify the nanoparticles and analyze their dispersion in the polymeric matrix. Moreover, thermogravimetric analysis (TGA) was carry out to confirm the presence and concentration of the silver nanoparticles in the filaments as well as the thermal stability of the nanocomposites. The bulk addition method was efficient to produce PET-Silver filaments with silver nanoparticles homogeneously dispersed in the PET matrix.

Thermal Stability of Ascorbic Acid and Ascorbic Acid Oxidase in African Cowpea Leaves (Vigna unguiculata) of Different Maturities

2011 ◽  
Vol 59 (5) ◽  
pp. 1774-1783 ◽  
Author(s):  
Michael Wawire ◽  
Indrawati Oey ◽  
Francis Mathooko ◽  
Charles Njoroge ◽  
Douglas Shitanda ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Ascorbic Acid ◽  
Vigna Unguiculata ◽  
Acid Oxidase ◽  
Ascorbic Acid Oxidase ◽  
Thermal Stability Of

Production and Thermal Stability of Silver Nanoparticles in the Ag–O System

2014 ◽  
Vol 53 (3-4) ◽  
pp. 199-204 ◽  
Author(s):  
Yu. A. Kurapov ◽  
L. A. Krushinskaya ◽  
S. E. Litvin ◽  
S. M. Romanenko ◽  
Ya. A. Stelmakh ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Silver Nanoparticles ◽  
Thermal Stability Of

Effects of low acyl and high acyl gellan gum on the thermal stability of purple sweet potato anthocyanins in the presence of ascorbic acid

2019 ◽  
Vol 86 ◽  
pp. 116-123 ◽  
Author(s):  
Xue-Jiao Xu ◽  
Sheng Fang ◽  
Yan-Hua Li ◽  
Fan Zhang ◽  
Zhi-Peng Shao ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Ascorbic Acid ◽  
Sweet Potato ◽  
Gellan Gum ◽  
Purple Sweet Potato ◽  
Thermal Stability Of

Research Regarding a Correlation Core–Shell Morphology–Thermal Stability of Silica–Silver Nanoparticles

2015 ◽  
Vol 203 (5) ◽  
pp. 649-659 ◽  
Author(s):  
Paraschiva Postolache ◽  
Valentin Petrescu ◽  
Dan Dumitru Dumitrascu ◽  
Cristina Rimbu ◽  
Narcisa Vrînceanu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Silver Nanoparticles ◽  
Shell Morphology ◽  
Core Shell ◽  
Thermal Stability Of

scholarly journals Understanding the Thermal Stability of Silver Nanoparticles Embedded in a-Si

2015 ◽  
Vol 119 (41) ◽  
pp. 23767-23773 ◽  
Author(s):  
Anna L. Gould ◽  
Shima Kadkhodazadeh ◽  
Jakob B. Wagner ◽  
C. Richard A. Catlow ◽  
Andrew J. Logsdail ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Silver Nanoparticles ◽  
Thermal Stability Of
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