Preparation of Amido Modified Silicone in Microemulsion

2008 ◽  
Vol 385-387 ◽  
pp. 497-500
Author(s):  
Jie Sheng Liu ◽  
Shi Qiang Huang ◽  
Shao Peng Wu
Keyword(s):  
Coupling Agent ◽  
Weak Acid ◽  
Correlation Spectroscopy ◽  
Acid Condition ◽  
Photon Correlation ◽  
Ph Values ◽  
Transmission Electron ◽  
Structures And Properties ◽  
Effects Of Ph ◽  
Ft Ir

A translucent amido modified microemulsion was synthesized by the adding of amido silane coupling agent. Transmission electron microscope (TEM), Fourier Transform Infrared Spectra (FT-IR), Photon Correlation Spectroscopy (PCS) were used to characterize the structures and properties of amido microemulsion, respectively. IR spectroscopy confirmed that amido group was successfully introduced into the polysiloxane microemulsion. TEM images indicated that the granules agglomerated heavily when the coupling agent was in a larger content. The effects of PH values, amount of coupling agent on the size and the configuration of the amido microemulsion were investigated. The results indicated that the properties of amido microemulsion were stable when the microemulsion was under weak acid condition (pH=3-7). When the amount of coupling agent increased, the particles size of microemulsion increased and the particle size distribution became narrow.

scholarly journals A Facile Urea-Assisted Thermal Decomposition Process of TiO2 Nanoparticles and Their Photocatalytic Activity

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 165
Author(s):  
Sandip Madhukar Deshmukh ◽  
Mohaseen S. Tamboli ◽  
Hamid Shaikh ◽  
Santosh B. Babar ◽  
Dipak P. Hiwarale ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Photocatalytic Activity ◽  
Tio2 Nanoparticles ◽  
Large Scale ◽  
Ultra Violet ◽  
Tio2 Nps ◽  
Transmission Electron ◽  
Structures And Properties ◽  
Ft Ir ◽  
Large Scale Synthesis

In the present work, we have reported a facile and large-scale synthesis of TiO2 nanoparticles (NPs) through urea-assisted thermal decomposition of titanium oxysulphate. We have successfully synthesized TiO2 NPs by using this effective route with different weight ratios of titanium oxysulphate: urea. The structures and properties of TiO2 NPs were confirmed by scanning electron microscope) (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), fourier transform infrared spectroscopy (FT-IR), ultra violet–visible spectroscopy (UV-vis), and photoluminescence (Pl) techniques. XRD demonstrated that TiO2 NPs holds of anatase crystal phase with crystallizing size 14–19 nm even after heating at 600 °C. TGA, SEM, and TEM images reveal urea’s role, which controls the size, morphology, and aggregation of TiO2 NPs during the thermal decomposition. These TiO2 NPs were employed for photodegradation of Methyl Orange (MO) in the presence of ultraviolet (UV) radiation. An interesting find was that the TiO2 NPs exhibited better photocatalytic activity and excellent recycling stability over several photodegradation cycles. Furthermore, the present method has a great perspective to be used as an efficient method for large-scale synthesis of TiO2 NPs.

PRODUCTION AND BIOFUNCTIONALIZATION OF MAGNETIC NANOBEADS FOR MAGNETIC SEPARATION OF MESSENGER RNA

2007 ◽  
Vol 02 (01) ◽  
pp. 109-122 ◽  
Author(s):  
BENEDIKT STEITZ ◽  
HEINRICH HOFMANN ◽  
ALKE PETRI-FINK
Keyword(s):  
Messenger Rna ◽  
Photon Correlation Spectroscopy ◽  
Superparamagnetic Iron Oxide ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Correlation Spectroscopy ◽  
Photon Correlation ◽  
Transmission Electron ◽  
Fourier Transformation Infrared Spectroscopy ◽  
Means Of Transmission

The synthesis of nanosized beads of superparamagnetic iron oxide nanoparticles coated with 3-(aminopropyl)triethoxysilane is reported in this paper. The resulting beads are agglomerates of SPIONs with an open fractal like structure. These beads have been examined by means of transmission electron microscopy (TEM), photon correlation spectroscopy (PCS), and attenuated total reflection Fourier transformation infrared spectroscopy (ATR-FTIR). The resulting beads with a size of 88 nm have been further biofunctionalized with avidin and biotinylated oligo(dT).

scholarly journals Síntese e caracterização de esferas monodispersas de látex e sua utilização no preparo de filmes de cristais coloidais tridimensionais.

2018 ◽  
Vol 39 (4) ◽  
pp. 79
Author(s):  
Mateus Geraldo Schiavetto ◽  
Roberto Bertholdo ◽  
Sidney José Lima Ribeiro ◽  
Younes Messaddeq
Keyword(s):  
Electron Microscopy ◽  
Photon Correlation Spectroscopy ◽  
Reflectance Spectroscopy ◽  
Correlation Spectroscopy ◽  
Polystyrene Latex ◽  
High Quality ◽  
Photon Correlation ◽  
Glass Slides ◽  
Transmission Electron ◽  
Vertical Deposition Method

Polystyrene latex spheres were obtained by free-emulsifier polymerization of styrene. Suspension was characterized by Photon Correlation Spectroscopy (PCS) and Transmission Electron Microscopy (TEM) and were observed to be monodisperse with sizes around 463 nm. A vertical deposition method was used in order to prepare films deposited on glass slides from the spheres suspension. High-quality opal-like films were obtained and characterized by Reflectance Spectroscopy, Scanning Electron Microscopy (SEM) and Optical Microscopy.

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