Synthesis of macroporous silica from solid-stabilised emulsion templates

Aranberri, Ibon; Binks, Bernard P.; Clint, John H.; Fletcher, Paul D. I.

doi:10.1007/s10934-008-9215-x

Cited by 22 publications

(20 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This method is analogously opposite to replication and results in a negative replica of the original sacrificial template, as opposed to the positive morphology obtained from replication. The method of the sacrificial material's extraction from the consolidated composite depends primarily on the type of pore former employed [33]. A wide variety of sacrificial materials can be used as pore formers, including natural and synthetic organics, salts, liquids, metals, and ceramics.…”

Section: Sacrificial Templatesmentioning

confidence: 99%

“…Ultrastable wet foams can be produced by direct foaming using particles instead of surfactants as foams stabilizers [16,19,25]. Porous ceramics' properties are also highly influenced by their chemical compositions and microstructures, with porosity, pore morphology, and size distribution being tailored by different compositions, different physical structures of the starting materials, and the use of different amphiphiles [30][31][32][33][34][35][36]. This review focuses on this process.…”

Section: Direct Foamingmentioning

confidence: 99%

See 1 more Smart Citation

Porous Ceramics

Sarkar¹,

Kim²

2015

Advanced Ceramic Processing

View full text Add to dashboard Cite

The unique chemical composition and microstructure of porous ceramics enable the ceramic products used in a number of applications such as filtration of molten metals and hot corrosive gases, high-temperature thermal insulation, support for catalytic reactions, filtration of diesel engine exhaust gases, etc. These applications take advantage of special characteristics of porous ceramics such as low thermal mass, low thermal conductivity, controlled permeability, high surface area, low density, and high specific strength. In this chapter, we emphasize on direct foaming method, a simple and versatile approach that allows fabrication of porous ceramics with tailored microstructure along with distinctive properties. Foam stability is achieved upon controlled addition of amphiphiles to the colloidal suspension, which induce in situ hydrophobization, allowing the wet foam to resist coarsening upon drying and sintering.

show abstract

Section: Sacrificial Templatesmentioning

confidence: 99%

Section: Direct Foamingmentioning

confidence: 99%

Porous Ceramics

Sarkar¹,

Kim²

2015

Advanced Ceramic Processing

View full text Add to dashboard Cite

show abstract

“…These particle networks also provide the foundation for novel materials synthesis in 2D geometry such as porous textures 3 , 2D…”

Section: Introductionmentioning

confidence: 99%

Interfacial Particle Dynamics: One and Two Step Yielding in Colloidal Glass

Zhang

Cayre

et al. 2016

Langmuir

View full text Add to dashboard Cite

The yielding behaviour of silica nanoparticles partitioned at an air-aqueous interface is reported. Linear viscoelasticity of the particle-laden interface can be retrieved via a timedependent and electrolyte-dependent superposition, and the applicability of the 'soft glassy rheology' (SGR) model is confirmed. With increasing electrolyte concentration a non-ergodic state is achieved with particle dynamics arrested firstly from attraction induced bonding bridges and then from the cage effect of particle jamming, manifesting in a two-step yielding process under large amplitude oscillation strain (LAOS). The Lissajous curves disclose a shear-induced in-cage particle re-displacement within oscillation cycles between the two yielding steps, exhibiting a 'strain softening' transitioning to 'strain stiffening' as the interparticle attraction increases. By varying and the particle spreading concentration, , a variety of phase transitions from fluid-to gel-and glass-like can be unified to construct a state diagram mapping the yielding behaviors from one-step to two-step before finally exhibiting one-step yielding at high and .

show abstract

“…The use of short amphiphiles to determine the wetting ability of particles is a versatile approach for the surface modification of a wide range of ceramic and metallic materials. 16) Controlling the contact angles of particles at the interface is important because it determines their wetting ability, which is in turn determined by the extent to which they are hydrophobic as shown in Fig. 2.…”

Section: Resultsmentioning

confidence: 99%

Micro porous SiO<sub>2</sub>–SiC ceramics from particle stabilized foams by direct foaming

Bhaskar

Cho

Park

et al. 2015

J. Ceram. Soc. Japan

View full text Add to dashboard Cite

Porous silicon carbide (SiC) ceramics have been a focus of interesting research in the field of porous materials due to their excellent thermal and mechanical properties, which results in wide spread applications in the industrial field. This study presents an approach for the production of porous SiO 2 ceramics using SiC as an additive by the process of direct foaming. The distribution and the microstructure of porous ceramics including the adsorption free energy and Laplace pressure of the particle stabilized colloidal suspension were investigated of around 5.5 © 10 8 kT and 1.19 mPa respectively to tailor the bubble size and pore size. The wet foam stability was found to be more than 80% and the degree of hydrophobicity achieved from the surfactant (Hexylamine) used can be calculated, measuring the change in the surface tension of the colloidal suspension used.

show abstract

Synthesis of macroporous silica from solid-stabilised emulsion templates

Cited by 22 publications

References 13 publications

Porous Ceramics

Porous Ceramics

Interfacial Particle Dynamics: One and Two Step Yielding in Colloidal Glass

Micro porous SiO<sub>2</sub>–SiC ceramics from particle stabilized foams by direct foaming

Contact Info

Product

Resources

About

Synthesis of macroporous silica from solid-stabilised emulsion templates

Cited by 22 publications

References 13 publications

Porous Ceramics

Porous Ceramics

Interfacial Particle Dynamics: One and Two Step Yielding in Colloidal Glass

Micro porous SiO<sub>2</sub>&ndash;SiC ceramics from particle stabilized foams by direct foaming

Contact Info

Product

Resources

About

Micro porous SiO<sub>2</sub>–SiC ceramics from particle stabilized foams by direct foaming