Characterization of Silica-Containing Aluminum Hydroxide and Oxide Aerogels

Trombetta, Marcella; Busca, Guido; Willey, Ronald J.

doi:10.1006/jcis.1997.4893

Cited by 26 publications

(10 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure B shows the FTIR absorption spectra of boehmite foams without heat treatment and that sintered at 900°C. The peaks around 485, 610 and 1065 cm −1 demonstrate typical peaks of boehmite AlOOH . The peak around 3360 cm −1 is the antisymmetric stretching vibration of hydroxyl in water, and the peak around 2090 cm −1 represents stretching vibration of hydroxyl.…”

Section: Resultsmentioning

confidence: 94%

Aerogel‐like ceramic foams with super‐high porosity and nanoscale cell wall from sol nanoparticles stabilized foams

et al. 2018

View full text Add to dashboard Cite

Ultralight ceramic foam materials with high porosity play an important role in increasingly hi‐tech areas due to the combinative merit of ceramic material and highly porous structure. So far, it remains challenging to fabricate alumina ceramic foams with extremely high porosity and high specific surface area that are comparable to aerogel materials by employing a low cost, eco‐friendly and convenient approach. For the first time, we propose the preparation of aerogel‐like ceramic foams with nanoscale cell wall and unprecedentedly high porosity using boehmite sol as both ceramic source and bubble interface stabilizer, based on sol nanoparticles stabilized foams using sodium lauryl sulfate (SDS) as modifier. The obtained ultra‐stable sol foams allow for the achievement of bulk foams with ultrathin cell wall with thickness in the range of 30‐90 nm, super‐high porosity up to 99%, and large specific surface area of 280 m2/g, which is attributed to the well‐organized assembly of nanoparticles at the liquid/air interfaces. This novel foam material demonstrates excellent adsorption ability for polar volatile organic gases (VOCs) due to its extremely high porosity and large specific surface area.

show abstract

Section: Resultsmentioning

confidence: 94%

Aerogel‐like ceramic foams with super‐high porosity and nanoscale cell wall from sol nanoparticles stabilized foams

et al. 2018

View full text Add to dashboard Cite

show abstract

“…However, a number of examples for higher Al amount can also be found [189]. The aerogel with mullite compositions (e.g., 2 SiO 2 ·3 Al 2 O 3 ) is not typical.…”

Section: Influence Of Synthesis Conditions On Nanoporous Structurementioning

confidence: 99%

Influence of Chemical Conditions on the Nanoporous Structure of Silicate Aerogels

Sinkó

2010

Materials

137

View full text Add to dashboard Cite

Silica or various silicate aerogels can be characterized by highly porous, open cell, low density structures. The synthesis parameters influence the three-dimensional porous structures by modifying the kinetics and mechanism of hydrolysis and condensation processes. Numerous investigations have shown that the structure of porous materials can be tailored by variations in synthesis conditions (e.g., the type of precursors, catalyst, and surfactants; the ratio of water/precursor; the concentrations; the medium pH; and the solvent). The objectives of this review are to summarize and elucidate the effects of chemical conditions on the nanoporous structure of sol-gel derived silicate aerogels.

show abstract

“…21,[22][23][24][25] The different forces of acid sites depend upon the chemical environment of the silicon atom and are inversely proportional to the number of organic (CH 3 ) methyl groups surrounding the silicon, which are characterized by electron donor properties.…”

Section: Resultsmentioning

confidence: 99%

“…This technique is both useful and precise allows polymer surface analysis without having to employ solvents, or resins, which could impair correct identification of the chemical bonds exposed. [21][22][23][24][25][26][27] Thanks to the low energy of IR rays, in fact, chemical bonds, even in thin layers, can be studied, without damaging moieties and providing specific spectra that characterize the surface of the solid, like a fingerprint. 9 Aim of the present study was to evaluate textured and smooth silicone breast implant shells using FTIR/ATR spectroscopy, in the attempt to identify eventual chemical modifications in silicone induced by texturization.…”

mentioning

confidence: 99%

Textured and Smooth Breast Implants: Is There a Difference in the Chemical Structure of Silicone?

Persichetti

Tenna²,

Delfino³

et al. 2009

Annals of Plastic Surgery

Self Cite

View full text Add to dashboard Cite

Scientific controversy concerning silicone and its biocompatibility has been ongoing for the last 10 years. This study on textured and smooth silicone breast implant shells using fourier transformation infrared spectroscopy associated with attenuated total reflectance cells aimed to identify eventual chemical modifications of silicone induced by texturization. The surfaces of 8 new implants produced by 2 well-known manufactures have been taken into consideration. A sample 1 cm2 has been harvested from the anterior and posterior sides of textured and smooth shells. Infrared spectra were then recorded, evaluated, and compared with the reference spectrum of pure silicone. Potentially reactive groups, known as silanols, were identified, in all shells, intensity increasing in textured implants (P < 0.05), whereas no silanols were detected in the spectrum of pure silicone. These results suggest that polar groups, present in manipulated silicone might influence capsula formation.

show abstract

Characterization of Silica-Containing Aluminum Hydroxide and Oxide Aerogels

Cited by 26 publications

References 28 publications

Aerogel‐like ceramic foams with super‐high porosity and nanoscale cell wall from sol nanoparticles stabilized foams

Aerogel‐like ceramic foams with super‐high porosity and nanoscale cell wall from sol nanoparticles stabilized foams

Influence of Chemical Conditions on the Nanoporous Structure of Silicate Aerogels

Textured and Smooth Breast Implants: Is There a Difference in the Chemical Structure of Silicone?

Contact Info

Product

Resources

About