Acoustic analysis of composite soft materials. I. Characterization of the core and boundary layer from compressibility of core/shell particles dispersed in poly(vinyl chloride)

2001 ◽  
Vol 81 (9) ◽  
pp. 2089-2094 ◽  
Author(s):  
Shinobu Koda ◽  
Naoki Tsutsuno ◽  
Gen Yamada ◽  
Hiroyasu Nomura
Keyword(s):  
Boundary Layer ◽  
Vinyl Chloride ◽  
Acoustic Analysis ◽  
Soft Materials ◽  
Core Shell ◽  
The Core ◽  
Poly Vinyl Chloride ◽  
Shell Particles

Core-shell particles designed for toughening poly(vinyl chloride)

2010 ◽  
Vol 59 (7) ◽  
pp. 980-985 ◽  
Author(s):  
Ming Chen ◽  
Chao Zhou ◽  
Zhenguo Liu ◽  
Chunlei Cao ◽  
Zhe Liu ◽  
...  
Keyword(s):  
Vinyl Chloride ◽  
Core Shell ◽  
Poly Vinyl Chloride ◽  
Shell Particles

Effect of Calcination Temperature on the Morphology of Carbon Nanosphere Synthesized from Polymethylmethacrylate

2014 ◽  
Vol 974 ◽  
pp. 55-59 ◽  
Author(s):  
Abdullah F. Al-Ahmadi ◽  
Mohammed A. Al-Daous ◽  
Tawfik A. Saleh
Keyword(s):  
Calcination Temperature ◽  
Core Shell ◽  
Carbon Nanospheres ◽  
Batch Mode ◽  
Resorcinol Formaldehyde ◽  
X Ray ◽  
The Core ◽  
Shell Particles ◽  
Hollow Carbon

In this work, hollow carbon nanospheres (HCNs) were synthesized by carbonizing core/shell particles of polymethylmethacrylate (PMMA)/ resorcinol formaldehyde. The core/shell particles were prepared using emulsion polymerization; polymethylmethacrylate as a template and resorcinol-formaldehyde polymer as the carbon source. Spheres were first synthesized by batch mode polymerization and then the shell was polymerized on the surface of the spheres. The composite was stabilized, and then carbonized. The effect of calcination temperature was investigated in the range between 200-500oC. Scanning electron microscopy (SEM), energy-dispersive X-ray spectrometer (EDX), Raman and Fourier transform infrared (FTIR) were used for characterization of the resulting carbon.

Preparation and Characterization of Gold-Loaded Magnetite/Silica Core-Shell Composites

2016 ◽  
Vol 42 ◽  
pp. 47-52
Author(s):  
Dan Dan Huang ◽  
Zhao Dai ◽  
Kun Yang ◽  
Yuan Yuan Chu
Keyword(s):  
Room Temperature ◽  
Solvothermal Reaction ◽  
Core Shell ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Core ◽  
Transmission Electron ◽  
Silica Core ◽  
Shell Particles

The fabrication of gold-loaded magnetite/silica core-shell particles was presented in this paper. First, 250 nm of magnetic Fe3O4 nanoparticles were prepared by solvothermal reaction. Then, the Fe3O4 particles were coated by SiO2, and Au nanoparticles (AuNPs), respectively. The core-shell structure of these microspheres was confirmed by transmission electron microscopy (TEM) and Power X-ray diffraction (XRD). The magnetic property of the core-shell microspheres was investigated at room temperature. The results indicated that the core-shell composites had a well-retained high magnetic intensity, thus it can be easily separated from the mixture in less than a few minutes by simply using a magnet.

Optical and Magnetic Studies of Fe3O4/Au Core/Shell Nanocomposites

2019 ◽  
Vol 18 (05) ◽  
pp. 1850033 ◽  
Author(s):  
Al-Sayed A. M. Al-Sherbini ◽  
Gamal El-Ghannam ◽  
Hesham Yehya ◽  
O. Aied Nassef
Keyword(s):  
Shell Structures ◽  
Core Shell ◽  
X Ray Diffraction ◽  
Magnetic Studies ◽  
Visible Absorption ◽  
The Core ◽  
Transmission Electron ◽  
Surface Poisoning ◽  
Shell Particles

In this paper, we report the synthesis of Fe3O4 nanoparticles which are resistant to surface poisoning, has been adopted. Fe3O4 nanoparticles have been successfully coated with Au in the form of a shell with different sizes (Fe3O4/Au Core/Shell). Adjustment of the components’ ratio makes the shell thickness of the core/shell particles tunable. Thus, the presented route yields well-defined core/shell structures of different sizes in the range 15–57[Formula: see text]nm with varying the proportion of Au noble metal to Fe3O4 nanoparticles. The UV-Visible absorption spectra, X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM) were applied for the characterization of the formed core/shell structures. Moreover, magnetic properties of the core/shell nanocomposites were also studied using Vibrating Sample Magnetometry (VSM).

The formation of colloidal copper nanoparticles stabilized by zinc stearate: one-pot single-step synthesis and characterization of the core–shell particles

2009 ◽  
Vol 11 (37) ◽  
pp. 8358 ◽  
Author(s):  
André Rittermeier ◽  
Shaojun Miao ◽  
Marie K. Schröter ◽  
Xiaoning Zhang ◽  
Maurits W. E. van den Berg ◽  
...  
Keyword(s):  
Copper Nanoparticles ◽  
Single Step ◽  
Zinc Stearate ◽  
Synthesis And Characterization ◽  
Core Shell ◽  
One Pot ◽  
The Core ◽  
Shell Particles

Synthesis and Characterization of Monodisperse Spherical SiO2@Y2O3: Tb3+ Particles with Core-Shell Structure

2014 ◽  
Vol 997 ◽  
pp. 317-320 ◽  
Author(s):  
Huan Wang ◽  
Ya Bing Liu ◽  
Ling Wei Kong
Keyword(s):  
Smooth Surface ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Spherical Shape ◽  
Core Shell ◽  
The Core ◽  
Sol Gel Process ◽  
Shell Particles ◽  
Average Size

Spherical submicron SiO2 particles have been coated with luminescent Y2O3: Tb3+ layers by a Pechini sol-gel process, resulting in the formation of SiO2@Y2O3: Tb3+ core-shell particles. The obtained core–shell phosphors have perfect spherical shape with narrow size distribution (average size ca. 450 nm), smooth surface and non-agglomeration. The thickness of shells could be easily controlled by changing the number of deposition cycles (35 nm for two deposition cycles). Under the excitation of ultraviolet, the Tb3+ ion mainly shows its characteristic emissions in the core-shell particles from Y2O3: Tb3+) shells. The emission intensity of Tb3+ can be tuned by the annealing temperature and the number of coating cycles.

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