Gelation

Brinker, C. Jeffrey

doi:10.1016/b978-0-08-057103-4.50010-6

Cited by 67 publications

(83 citation statements)

References 59 publications

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“…The sol-gel processing using metal alkoxides, such as tetraethyl orthosilicate (TEOS), has been widely used for the synthesis of silica based materials [19][20][21]. This technique for making silica particles involves hydrolysis and subsequent condensation of silicon alkoxide using short-chain alcohols as solvents.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of silica powders by pressured carbonation

Cai

Hong

Wang

et al. 2009

Chemical Engineering Journal

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Section: Introductionmentioning

confidence: 99%

Synthesis of silica powders by pressured carbonation

Cai

Hong

Wang

et al. 2009

Chemical Engineering Journal

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“…Moreover, even though traditional silica aerogels with ultra fine particle and pore size and extremely large surface area, these aerogels with Si-OH group are hydrophilic and become wet with moisture and water. The aerogels easily get deteriorated with time due to hydrogen bonding generating between the polar -OH group on aerogels surface and the H 2 O from the humid surroundings [4][5][6] . So it is very necessary to develop some new processes to synthesize hydrophobic silica aerogels using reasonable methods and cost.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characteristics of mesoporous silica aerogels with one-step solvent exchange/surface modification

Wang

Zhao

2009

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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The synthesis procedures and physical properties of the ambient dried hydrophobic silica aerogels by using different contents of ethanol (EtOH)/trimethylchlorosilane (TMCS)/n-Hexane as surface modification agent were investigated. One-step solvent exchange and surface modification were simultaneously progressed by immersing silica hydrogels in EtOH/TMCS/n-Hexane solution. It is found that microstructures as well as properties of silica aerogels like porosity, specific density and specific surface area are affected by the contents of surface modification agent in the sol from the results of SEM, TEM morphology, FT-IR chemical structure, BET surface area and BJH pore size analyses. The volume of TMCS is of 10% and 20% of hydrogels, and the final product is hydrophilic xerogels. When TMCS's percent (v/v) is elevated to 75%-100%, hydrophobic silica aerogels with good performance are synthesized, the porosities of aerogels are in the range of 93.5%-95.8% and the average pore size diameter is less than 20 nm.

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“…[9] Different silver salt solutions comprise the liquid phase; these solutions were chosen on their ability to form either a stable latent image for the exposure process, or to precipitate silver as required in the development process. The interconnected porous network developed in the sol±gel process enables the initial pore liquid to be replaced with other solutions as desired.…”

mentioning

confidence: 99%