Dependency of Nanodiamond Particle Size and Outermost-Surface Composition on Organo-Modification: Evaluation by Formation of Organized Molecular Films and Nanohybridization with Organic Polymers

2017 ◽  
Vol 9 (16) ◽  
pp. 14379-14390 ◽  
Author(s):  
Taira Tasaki ◽  
Yifei Guo ◽  
Qi Meng ◽  
Muhammad Abdullah Al Mamun ◽  
Yusuke Kasahara ◽  
...  
Keyword(s):  
Particle Size ◽  
Surface Composition ◽  
Organic Polymers ◽  
Molecular Films ◽  
Nanodiamond Particle ◽  
Outermost Surface

Anaerobic vs. aerobic preparation of silicon nanoparticles by stirred media milling. The effects of dioxygen, milling solvent, and milling time on particle size, surface area, crystallinity, surface/near-surface composition, and reactivity

RSC Advances ◽  
2016 ◽  
Vol 6 (113) ◽  
pp. 112370-112380
Author(s):  
Eric V. Bukovsky ◽  
Karlee P. Castro ◽  
Brent M. Wyatt ◽  
Olga V. Boltalina ◽  
Steven H. Strauss
Keyword(s):  
Particle Size ◽  
Surface Area ◽  
Silicon Nanoparticles ◽  
Milling Time ◽  
Surface Composition ◽  
Near Surface ◽  
Media Milling ◽  
Attritor Milling

Silicon nanoparticles milled anaerobically in heptane or mesitylene are smaller and much more reactive than SiNPs milled aerobically in the same solvents for equal attritor milling times.

The simulation of mechanochemical chain scisson in organic polymers

1984 ◽  
Vol 5 (3) ◽  
pp. 305-316
Author(s):  
Ikekawa A.
Keyword(s):  
Particle Size ◽  
Molecular Mass ◽  
Ball Milling ◽  
Mass Distribution ◽  
Molecular Mass Distribution ◽  
Bimodal Distribution ◽  
Organic Polymers ◽  
Simulation Results ◽  
Terminal Chain

Variation in the molecular mass distribution (MMD) of straight polymers, with molecular mass (M) of (1.1-2) x 106, upon central, random or terminal chain scisson (CCS, RCS or TCS, respectively) was simulated. The peak in the MMD was shown to shift to a lower M upon CCS or RCS and the randomly cut polymers were more widely distributed than the centrally cut polymers. A bimodal distribution was obtained upon TCS. A parameter 'n1' in a modified Rosin-Rammler plot, where M is substituted for particle size in Rosin-Rammler's equation, stayed at 2.1-2.3 for CCS at the range of large t and it stayed at 1.3-1.7 for RCS. n1 for TCS decreased to zero with increasing t. Application of these simulation results to ball-milling of polyvinylpyrrolidone (PVP) in nitrogen showed that TCS of PVP was accompanied with its RCS. It was also shown that addition of phenothiazine or acridine increased the rate of RCS.

Surface composition and particle size in solder powders

1981 ◽  
Vol 47 (2) ◽  
pp. 175-177
Author(s):  
J.M. Grow ◽  
L. Weinberger
Keyword(s):  
Particle Size ◽  
Surface Composition

Study on Fly Ash Adhesion Characteristics and Deposition Mechanism in Shell Coal Gasification Process

2011 ◽  
Vol 233-235 ◽  
pp. 789-793
Author(s):  
Han Xu Li ◽  
Fei Ma ◽  
Xin Sheng ◽  
Ming Jun Ji
Keyword(s):  
Particle Size ◽  
Fly Ash ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Coal Gasification ◽  
Surface Composition ◽  
Image Analyzer ◽  
Deposition Mechanism ◽  
Gasification Process ◽  
Physicochemical Changes

This paper describes the characteristics and mechanism of fly ash deposited in Shell coal gasification process. The chemical composition, particle size distribution, surface topography and elemental composition of fly ash samples derived from coal A and coal B are studied by X-ray fluorescence spectrometer, JX-2000 microscopic image analyzer and computer controlled scanning electron microscopy (SEM/EDX) respectively. The results show that the differences in ash deposition characteristics result from the differences in surface properties and element composition of fly ash particles generated from different coal feed. The fly ash formation and deposition mechanism are discussed based on physicochemical changes in gasification, particle size distribution and surface composition enriched in Ca, Fe in fly ash particles. The results can serve as reference data for a variety of deposition studies.

Sign in / Sign up

Export Citation Format

Share Document