scholarly journals Novel Organically Modified Core-Shell Clay for Epoxy Composites—“SOBM Filler 1”

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Nnamdi Chibuike Iheaturu ◽  
Innocent Chimezie Madufor
Keyword(s):  
Weight Percent ◽  
Temperature Treatment ◽  
Epoxy Composites ◽  
High Temperature Treatment ◽  
Core Shell ◽  
Drilling Mud ◽  
Modified Clay ◽  
Hydrophilic Nature ◽  
Organically Modified ◽  
Ft Ir

Preparation of a novel organically modified clay from spent oil base drilling mud (SOBM) that could serve as core-shell clay filler for polymers is herein reported. Due to the hydrophilic nature of clay, its compatibility with polymer matrix was made possible through modification of the surface of the core clay sample with 3-aminopropyltriethoxysilane (3-APTES) compound prior to its use. Fourier transform infrared (FT-IR) spectroscopy was used to characterize clay surface modification. Electron dispersive X-ray diffraction (EDX) and scanning electron microscopy (SEM) were used to expose filler chemical composition and morphology, while electrophoresis measurement was used to examine level of filler dispersion. Results show an agglomerated core clay powder after high temperature treatment, while EDX analysis shows that the organically modified clay is composed of chemical inhomogeneities, wherein elemental compositions in weight percent vary from one point to the other in a probe of two points. Micrographs of the 3-APTES coupled SOBM core-shell clay filler clearly show cloudy appearance, while FT-IR indicates 25% and 5% increases in fundamental vibrations band at 1014 cm−1 and 1435 cm−1, respectively. Furthermore, 3-APTES coupled core-shell clay was used to prepare epoxy composites and tested for mechanical properties.

Preparation Crystalline Mesoporous Titania at Mild Conditions with Inorganic Titanium Precursors

2010 ◽  
Vol 113-116 ◽  
pp. 2053-2056
Author(s):  
Yan Wang ◽  
Rui Qing Liu ◽  
Ai Hua Wen ◽  
Xuan Dong Li
Keyword(s):  
Soxhlet Extraction ◽  
Temperature Treatment ◽  
Mesoporous Tio2 ◽  
High Temperature Treatment ◽  
Mesoporous Titania ◽  
N2 Adsorption ◽  
Mild Conditions ◽  
Ft Ir ◽  
Adsorption Desorption ◽  
Additive Reaction

In order to avoid the damage on mesostructure by the high temperature treatment, inorganic titanium species were used as the precursors for the preparation of mesoporous TiO2 of crystalline framework at mild conditions. The influences of the precursor, additive, reaction pH and temperature on phase and textural structures of the products were investigated. The samples were characterized by XRD, N2 adsorption/desorption, FT-IR and SEM. The results show that anatase mesoporous TiO2 with large surface area could be obtained without calcination with Ti(SO4)2 as precursor or TiCl4 when SO42- was added. And the template could be completely removed by Soxhlet extraction.

Transformation of alumina-supported Pt-Au alloyed nanoparticles into core-shell Pt@Au structures during high-temperature treatment

2020 ◽  
Vol 22 (5) ◽  
Author(s):  
Aleksey A. Vedyagin ◽  
Yury V. Shubin ◽  
Pavel E. Plyusnin ◽  
Vladimir O. Stoyanovskii ◽  
Roman M. Kenzhin
Keyword(s):  
High Temperature ◽  
Temperature Treatment ◽  
High Temperature Treatment ◽  
Core Shell

scholarly journals Co-extrusion of zirconia core-shell rods with controlled porosity in the core

2018 ◽  
Vol 12 (3) ◽  
pp. 230-239
Author(s):  
Jaroslav Kastyl ◽  
Vaclav Pouchly ◽  
Martin Trunec
Keyword(s):  
Temperature Treatment ◽  
High Temperature Treatment ◽  
Core Shell ◽  
Rheological Analysis ◽  
Binder Removal ◽  
The Core ◽  
Porous Core ◽  
Controlled Porosity ◽  
Dense Shell ◽  
Shell Geometry

A method for manufacturing bi-layered zirconia rods of core-shell geometry with a porous core and a dense shell has been developed. Core-shell rods were successfully prepared by thermoplastic co-extrusion of assembled feed rods composed of core and shell zirconia feedstocks. Rheological analysis and adjustment of the feedstock viscosities enabled co-extrusion of regular core-shell rods of uniform shell thickness. Tapioca starch was used as a pore-forming agent in the core feedstock. Binder removal and high temperature treatment had to be modified in order to safely remove the starch particles. Sintering analysis revealed constrained sintering of porous cores in the core-shell rods due to the rigid dense shell, which resulted in an increased porosity in the core. Defect-free core-shell rods with a core porosity of up to 40% and different thicknesses of the dense shell were prepared.

scholarly journals Fabrication of copper(II)-coated magnetic core-shell nanoparticles Fe3O4@SiO2-2-aminobenzohydrazide and investigation of its catalytic application in the synthesis of 1,2,3-triazole compounds

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
H. Rajabi-Moghaddam ◽  
M. R. Naimi-Jamal ◽  
M. Tajbakhsh
Keyword(s):  
High Efficiency ◽  
Click Reaction ◽  
Magnetic Core ◽  
Core Shell ◽  
Isatoic Anhydride ◽  
Shell Nanoparticles ◽  
Triazole Derivatives ◽  
Catalytic Application ◽  
Ft Ir ◽  
Core Shell Nanoparticles

AbstractIn the present work, an attempt has been made to synthesize the 1,2,3-triazole derivatives resulting from the click reaction, in a mild and green environment using the new copper(II)-coated magnetic core–shell nanoparticles Fe3O4@SiO2 modified by isatoic anhydride. The structure of the catalyst has been determined by XRD, FE-SEM, TGA, VSM, EDS, and FT-IR analyzes. The high efficiency and the ability to be recovered and reused for at least up to 6 consecutive runs are some superior properties of the catalyst.

Asymmetric mixed matrix membrane incorporating organically modified clay particle for gas separation

2014 ◽  
Vol 241 ◽  
pp. 495-503 ◽  
Author(s):  
A.K. Zulhairun ◽  
A.F. Ismail ◽  
T. Matsuura ◽  
M.S. Abdullah ◽  
A. Mustafa
Keyword(s):  
Gas Separation ◽  
Clay Particle ◽  
Mixed Matrix Membrane ◽  
Mixed Matrix ◽  
Modified Clay ◽  
Organically Modified
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