Synthesis of silica aerogels microspheres prepared by ink jet printing and dried at ambient pressure without surface hydrophobization

García-Torres, B.A.; Aguilar-Elguézabal, A.; Román-Aguirre, Manuel; Álvarez‐Contreras, Lorena

doi:10.1016/j.matchemphys.2015.12.047

Cited by 13 publications

(14 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The peak at 2983 cm 1 is assigned to vibrations of the CH 3 groups, suggesting the presence of Si-OC 2 H 5 groups. The presence of these groups suggests an incomplete condensation during gelation process [19,21,22]. As the calcination temperature increases, the peak at 975 cm 1 slowly disappears and the intensity of the peak at 2983 cm 1 also decreases, while that of the peak at 800 cm 1 increases.…”

Section: Effect Of Calcination Temperature On Morphology Of Sio 2 Amentioning

confidence: 99%

A study of morphological properties of SiO2 aerogels obtained at different temperatures

Liao

Gao

et al. 2018

J Adv Ceram

View full text Add to dashboard Cite

In this paper, temperature dependence of nanoporous framework evolution process and variety of pore properties (pore volume, specific surface area (BET), and pore size) of SiO 2 aerogels were characterized by FTIR, XPS, XRD, SEM, TEM, BET, BJH, etc. Results show that SiO 2 aerogels treated at different temperatures all possess amorphous structure. With the increase of treated temperatures, BET values of SiO 2 aerogels increase initially and then decrease, and it reaches the maximum value of 882.81 m 2 /g when treated at 600 ℃ for 2 h due to the addition of the nanopores and shrinkage skeleton of SiO 2 aerogels. Higher temperatures may result in a framework transformation and particle growth; both factors could reduce the BET values of the aerogels. Nanoporous skeleton of SiO 2 aerogels at room temperatures is composed of tetrahedron with a pore size of about 22.28 nm. Higher treated temperatures result in an increase of octahedron amount in nanoporous framework and a decrease of pore size. When treated at 1000 ℃, an approximate dense SiO 2 bulk via the framework collapse and particle growth is obtained. These varieties are derived from the formed extra bonds of Si-O-Si, higher local stress, and liquid phase between particles during heat treatment process.

show abstract

Section: Effect Of Calcination Temperature On Morphology Of Sio 2 Amentioning

confidence: 99%

A study of morphological properties of SiO2 aerogels obtained at different temperatures

Liao

Gao

et al. 2018

J Adv Ceram

View full text Add to dashboard Cite

show abstract

“…Since then, printing of a wide variety of aerogels, including of graphene, 178 SiO 2 , 179 RF polymer, 180 carbon, 19 cellulose, 181 metal, 54 semiconductor, 182 and g-C 3 N 4 183 have been reported. The technologies that have thus far been used to print aerogels include inkjet for microspheres, 184 inkjet and screen for substrate-bound thinfilms, 182,185 and photopolymerization (light-based printing), 22 extrusion 186 and sacrificial template 177 for 3D form factors. Simplified printing mechanisms of these technologies for aerogels are summarized in Fig.…”

Section: Printing Technology For Aerogelsmentioning

confidence: 99%

“…The molecule-derived gel inks that have been developed thus far have focused on printing SiO 2 -based, 179,184,[205][206][207][208] RF, 19,180 and alginate aerogels. 209 The printing methods compatible with these inks mainly include inkjet, 184,209 light-induced-cross-linking 3D, [205][206][207] and extrusion 3D printing. 19,179,180 Table 2 shows selected examples of molecule-derived gel inks printed using these methods.…”

Section: Ink Preparation Processes and Chemistry For Printed Aerogelsmentioning

confidence: 99%

“…For example, SiO 2 sol, prepared by a traditional two-step acid-base process, has directly been used for inkjet printing to prepare SiO 2 aerogel microspheres. 184 Similarly, alginate gel microspheres have been successfully demonstrated by inkjet printing aqueous solution of alginic acid sodium salt into calcium chloride (CaCl 2 ) aqueous solution. The concentrations that are feasible for inkjet printing are 0.25-0.35 wt%.…”

Section: Ink Preparation Processes and Chemistry For Printed Aerogelsmentioning

confidence: 99%

See 1 more Smart Citation

Printed aerogels: chemistry, processing, and applications

et al. 2021

View full text Add to dashboard Cite

show abstract

“…A potential approach to address the above challenge is to pre-synthesize silica aerogel microspheres. In this way, the solvent exchange step could proceed quickly (minimal diffusion obstacles), thus allowing a dramatic reduction in synthesis time [ 17 ]. Huang et al reported a silica aerogel glazing system by filling granular silica aerogel in between two layers of glass plates, and the results showed that the system processed excellent thermal insulation [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Silica Aerogel Microspheres

2017

View full text Add to dashboard Cite

Silica aerogel microspheres based on alkali silica sol were synthesized using the emulsion method. The experimental results revealed that the silica aerogel microspheres (4–20 µm in diameter) were mesoporous solids with an average pore diameter ranging from 6 to 35 nm. The tapping densities and specific surface areas of the aerogel microspheres are in the range of 0.112–0.287 g/cm3 and 207.5–660.6 m2/g, respectively. The diameter of the silica aerogel microspheres could be tailored by varying the processing conditions including agitation rate, water/oil ratio, mass ratio of Span 80: Tween 80, and emulsifier concentration. The effects of these parameters on the morphology and textural properties of the synthesized silica aerogel microspheres were systematically investigated. Such silica aerogel microspheres can be used to prepare large-scale silica aerogels at an ambient pressure for applications in separation and high efficiency catalysis, which requires features of high porosity and easy fill and recovery.

show abstract

Synthesis of silica aerogels microspheres prepared by ink jet printing and dried at ambient pressure without surface hydrophobization

Cited by 13 publications

References 23 publications

A study of morphological properties of SiO2 aerogels obtained at different temperatures

A study of morphological properties of SiO2 aerogels obtained at different temperatures

Printed aerogels: chemistry, processing, and applications

Preparation and Characterization of Silica Aerogel Microspheres

Contact Info

Product

Resources

About