Rapid fabrication of core–shell silica particles using a multilayer-by-multilayer approach

2011 ◽  
Vol 47 (4) ◽  
pp. 1207-1209 ◽  
Author(s):  
Hanjiang Dong ◽  
John D. Brennan
Keyword(s):  
Silica Particles ◽  
Core Shell ◽  
Rapid Fabrication

Facile and versatile method for preparing core–shell microspheres with controlled surface structures based on silica particles-monolayer

2011 ◽  
Vol 129 (3) ◽  
pp. 871-880 ◽  
Author(s):  
Atsumi Uchimura ◽  
Sachiyo Kubota ◽  
Shotaro Yamada ◽  
Takeshi Wakiya ◽  
Makoto Takafuji ◽  
...  
Keyword(s):  
Silica Particles ◽  
Surface Structures ◽  
Core Shell

Fabrication of Integral Core/Shell Ceramic Casting Mould for Hollow Turbine Blade

2012 ◽  
Vol 248 ◽  
pp. 231-236 ◽  
Author(s):  
Hai Hua Wu ◽  
Di Chen Li ◽  
Yi Ping Tang
Keyword(s):  
Turbine Blade ◽  
Turbine Blades ◽  
Core Shell ◽  
Green Body ◽  
Positional Accuracy ◽  
Ceramic Slurry ◽  
Rapid Fabrication ◽  
Hollow Turbine Blade ◽  
Ceramic Casting

The paper presents an integral core/shell fabrication of ceramic casting mould for hollow turbine blades by combining SL (Stereolithography) with gelcasting. This method could guarantee the positional accuracy between ceramic cores and shell, thus achieving the rapid fabrication of complex turbine blade castings. The paper focuses on the design of resin mould for gelcasting, the preparation of ceramic slurry, the pyrolysis of resin prototype and the sintering of ceramic green body. The feasibility and effectiveness of above mentioned method were verified through successful manufacturing of hollow turbine blades with double-walled structure.

Processing and Characterization of Core-Shell PA12/Silica Composites Produced by Selective Laser Sintering

2010 ◽  
Vol 160-162 ◽  
pp. 756-761 ◽  
Author(s):  
Jian Hong Wang ◽  
Pei Kang Bai ◽  
Zhen Lin Zhang ◽  
Yu Xin Li
Keyword(s):  
Emulsion Polymerization ◽  
Silica Particle ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Silica Particles ◽  
Sintering Behavior ◽  
Core Shell ◽  
Dense Structure ◽  
Maximum Value

Silica particles coated with PA12 by emulsion polymerization were used as fillers to reinforce PA12 based composites prepared by selective laser sintering (SLS). The influences of the treated and untreated particles on the sintering behavior and mechanical properties of the laser sintered specimens were investigated. It was found that there were many uneven holes in the untreated composites. However, for the treated composites, due to the silica particle surfaces treated by emulsion polymerization, the absorbance of laser was improved and the particles dispersed well in the polymer matrix; a full dense structure was obtained and the properties were enhanced, such as the tend strength increased 30%, the maximum value was 34MPa; the tensile strength increased up to 125%, the maximum value was 44.2 MPa, comparing to the unfilled PA12. Drawing from the results, it can be confirmed that a full dense structure can be obtained and the PA12 matrix was strengthened and toughened when the silica particles were coated with PA12 by emulsion polymerization.

Nanoengineering of Surface Modified Silica Particles to Form Core-Shell and HollowNanospheres of Iron Oxide

2007 ◽  
Vol 7 (10) ◽  
pp. 3662-3669 ◽  
Author(s):  
Neha Hebalkar ◽  
P. Radhika ◽  
B. Sreedhar ◽  
M. Lakshmi Kantam
Keyword(s):  
Iron Oxide ◽  
Silica Particles ◽  
Core Shell ◽  
Modified Silica ◽  
Surface Modified

scholarly journals Synthesis and characterization of mesoporous silica core-shell particles

2010 ◽  
Vol 4 (2) ◽  
pp. 81-85 ◽  
Author(s):  
Milan Nikolic ◽  
Konstantinos Giannakopoulos ◽  
Vladimir Srdic
Keyword(s):  
Sodium Silicate Solution ◽  
Silicate Solution ◽  
Silica Particles ◽  
Core Shell ◽  
Functionalized Silica ◽  
Silica Core ◽  
Shell Particles ◽  
Average Size ◽  
Core Particles

Core-shell particles were formed by deposition of primary silica particles synthesized from sodium silicate solution on functionalized silica core particles (having size of ~0.5 ?m) prepared by hydrolysis and condensation of tetraethylortosilicate. The obtained mesoporous shell has thickness of about 60 nm and consists of primary silica particles with average size of ~21 nm. Scanning electron microscopy and zeta potential measurements showed that continuous silica shell exists around functionalized core particles which was additionally proved by FTIR and TEM results.

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