One‐step synthesis of polymer dispersions with large narrow size distribution particles via heterophase polymerization in presence of surface active water‐insoluble organosilicon macromers

To avoid the formation of hollow spheres during spray pyrolysis, NH3 was employed to change the mechanism of forming NiFe2O4 from aerosols, containing Ni(II) and Fe(III) nitrates in the required stoichiometric ratio. Nearly spherical, solid submicron NiFe2O4 particles with narrow size distribution were produced in one step using a dilute aqueous solution at pyrolysis temperatures as low as 823 K. However, higher pyrolysis temperatures (≥1023 K) reduced the oxides to metallic alloy of Ni and Fe due to dissociation of NH3. The forming steps and possible reaction mechanisms for aerosol droplets involved in the process were discussed.

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Design and Synthesis of Functional Silsesquioxane-Based Hybrids by Hydrolytic Condensation of Bulky Triethoxysilanes

International Journal of Polymer Science ◽

10.1155/2012/173624 ◽

2012 ◽

Vol 2012 ◽

pp. 1-17 ◽

Cited By ~ 8

Author(s):

Hideharu Mori

Keyword(s):

Size Distribution ◽

Water Soluble ◽

Metal Alkoxides ◽

Narrow Size Distribution ◽

Stimuli Responsive ◽

Design And Synthesis ◽

One Step ◽

The Subject ◽

Characteristic Features ◽

The One

This paper presents a short overview of recent advances in the design and synthesis of organic-inorganic hybrids using silsesquioxane-based nanoparticles having nanometer size, relatively narrow size distribution, high functionalities, and various characteristic features, mainly focusing on our recent researches related to the subject. A highlight of this paper is the water-soluble silsesquioxane-based nanoparticles, including hydroxyl-functionalized and cationic silsesquioxanes, which were synthesized via the one-step condensation of the bulky triethoxysilane precursors. The design and synthesis of R-SiO1.5/SiO2and R-SiO1.5/TiO2hybrids by hydrolytic cocondensation of a triethoxysilane precursor and metal alkoxides are briefly introduced. This paper also deals with recent results in stimuli-responsive hybrids based on the water-soluble silsesquioxane nanoparticles and fluorinated and amphiphilic silsesquioxane hybrids.

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Narrow size-distribution poly(methyl methacrylate) nanoparticles made by semicontinuous heterophase polymerization

Journal of Applied Polymer Science ◽

10.1002/app.32886 ◽

2010 ◽

Vol 119 (3) ◽

pp. 1827-1834 ◽

Cited By ~ 25

Author(s):

J. Aguilar ◽

M. Rabelero ◽

S. M. Nuño-Donlucas ◽

E. Mendizábal ◽

A. Martínez-Richa ◽

...

Keyword(s):

Methyl Methacrylate ◽

Size Distribution ◽

Narrow Size Distribution ◽

Poly Methyl Methacrylate ◽

Heterophase Polymerization ◽

Semicontinuous Heterophase Polymerization

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Macrostructure and microphysics of Saturn's E-ring

International Astronomical Union Colloquium ◽

10.1017/s0252921100101691 ◽

1984 ◽

Vol 75 ◽

pp. 607-613 ◽

Cited By ~ 2

Author(s):

Kevin D. Pang ◽

Charles C. Voge ◽

Jack W. Rhoads

Keyword(s):

Size Distribution ◽

Spherical Shape ◽

Mie Scattering ◽

Narrow Size Distribution ◽

Electrostatic Levitation ◽

Volcanic Origin ◽

Micron Diameter

Abstract.All observed optical and infrared properties of Saturn's E-ring can be explained in terms of Mie scattering by a narrow size distribution of ice spheres of 2 - 2.5 micron diameter. The spherical shape of the ring particles and their narrow size distribution imply a molten (possibly volcanic) origin on Enceladus. The E-ring consists of many layers, possibly stratified by electrostatic levitation.

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