Influence of alcohol treatments on the activity of lipases immobilized on methyl-modified silica aerogels

2010 ◽  
Vol 101 (19) ◽  
pp. 7231-7238 ◽  
Author(s):  
Siliang Gao ◽  
Wenwen Wang ◽  
Yujun Wang ◽  
Guangsheng Luo ◽  
Youyuan Dai
Keyword(s):  
Silica Aerogels ◽  
Modified Silica ◽  
Alcohol Treatments

Alkylated phase change composites for thermal energy storage based on surface-modified silica aerogels

2015 ◽  
Vol 3 (5) ◽  
pp. 1935-1940 ◽  
Author(s):  
Xinyu Huang ◽  
Zhenpu Liu ◽  
Wei Xia ◽  
Ruqiang Zou ◽  
Ray P. S. Han
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Silica Aerogels ◽  
Modified Silica ◽  
Phase Change Composites ◽  
Surface Modified ◽  
And Storage ◽  
Change Material

We alkylated silica aerogels to make them hydrophobic for effective impregnation and storage of a phase change material (PCM).

In situ preparation of Ni nanoparticles in cerium-modified silica aerogels for coking- and sintering-resistant dry reforming of methane

2017 ◽  
Vol 41 (12) ◽  
pp. 4869-4878 ◽  
Author(s):  
Xiaoyuan Zhao ◽  
Meirong Lu ◽  
Hongrui Li ◽  
Jianhui Fang ◽  
Liyi Shi ◽  
...  
Keyword(s):  
Silica Aerogels ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Ni Nanoparticles ◽  
Modified Silica ◽  
In Situ Preparation

Ni nanoparticles in nanochannels of cerium-modified silica aerogels were in situ prepared for coking-resistant dry reforming of methane.

Nitrogen and Water Sorption Properties of Ethyl-Substituted Silica Aerogels and Xerogels

1994 ◽  
Vol 371 ◽  
Author(s):  
Chunling Liu ◽  
Sridhar Komarneni
Keyword(s):  
Pore Structure ◽  
Surface Area ◽  
Water Sorption ◽  
Ph Value ◽  
High Surface ◽  
High Surface Area ◽  
Silica Aerogels ◽  
Modified Silica ◽  
Surface Areas ◽  
Water Sorption Properties

AbstractHigh surface area ethyltrimethoxysilane (ETMS) modified silica aerogels and xerogels were synthesized by cohydrolyzing the mixtures of ETMS and tetramethylorthosilicate (TMOS). The effects of ETMS content, pH value and solvent addition were investigated. The surface area, pore structure and hydrophobicity were studied using nitrogen and water sorption measurements. By ETMS modification of TMOS gels, high surface area, density and hydrophobicity were achieved. The 25 mole% ETMS-75 mole% TMOS was found to be the best composition for both aerogel and xerogel, which are hydrophobic and have surface areas of 1221 and 832 m2/g, respectively.

Chemical, Physical, and Mechanical Characterization of Isocyanate Cross-linked Amine-Modified Silica Aerogels

2006 ◽  
Vol 18 (2) ◽  
pp. 285-296 ◽  
Author(s):  
Atul Katti ◽  
Nilesh Shimpi ◽  
Samit Roy ◽  
Hongbing Lu ◽  
Eve F. Fabrizio ◽  
...  
Keyword(s):  
Mechanical Characterization ◽  
Silica Aerogels ◽  
Modified Silica

scholarly journals Synthesis of Silicon Carbide Powders from Methyl-Modified Silica Aerogels

2020 ◽  
Vol 10 (18) ◽  
pp. 6161
Author(s):  
Kyoung-Jin Lee ◽  
Yanggu Kang ◽  
Young Hun Kim ◽  
Se Won Baek ◽  
Haejin Hwang
Keyword(s):  
Silicon Carbide ◽  
High Purity ◽  
Silica Aerogel ◽  
Carbothermal Reduction ◽  
Single Phase ◽  
Phase Evolution ◽  
Silica Aerogels ◽  
Methyl Groups ◽  
Modified Silica ◽  
Lower Temperature

β-silicon carbide (SiC) powders were synthesized by the carbothermal reduction of methyl-modified silica aerogel/carbon mixtures. The correlations between the phase evolution and morphologies of the SiC powders and the C/SiO2 ratio were investigated. At a C/SiO2 ratio of 3, β-SiC formed at 1425 °C and single-phase SiC powders were obtained at 1525 °C. The methyl groups (-CH3) on the silica aerogel surfaces played important roles in the formation of SiC during the carbothermal reduction. SiC could be synthesized from the silica aerogel/carbon mixtures under lower temperature and C/SiO2 ratios than those needed for quartz or hydrophilic silica. The morphology of the SiC powder depended on the C/SiO2 ratio. A low C/SiO2 ratio resulted in β-SiC powder with spherical morphology, while agglomerates consisting of fine SiC particles were obtained at the C/SiO2 ratio of 3. High-purity SiC powder (99.95%) could be obtained with C/SiO2 = 0.5 and 3 at 1525 °C for 5 h.

Chiral lactate-modified silica aerogels

2017 ◽  
Vol 237 ◽  
pp. 127-131 ◽  
Author(s):  
S.A. Lermontov ◽  
N.A. Sipyagina ◽  
A.N. Malkova ◽  
A.E. Baranchikov ◽  
V.K. Ivanov
Keyword(s):  
Silica Aerogels ◽  
Modified Silica

Immobilization of lipase on methyl-modified silica aerogels by physical adsorption

2009 ◽  
Vol 100 (2) ◽  
pp. 996-999 ◽  
Author(s):  
Siliang Gao ◽  
Yujun Wang ◽  
Tao Wang ◽  
Guangsheng Luo ◽  
Youyuan Dai
Keyword(s):  
Physical Adsorption ◽  
Silica Aerogels ◽  
Modified Silica

scholarly journals Structure and thermal stability in hydrophobic Pluronic F127-modified silica aerogels

2018 ◽  
Vol 267 ◽  
pp. 242-248 ◽  
Author(s):  
Taína Z. Fermino ◽  
Carlos M. Awano ◽  
Leandro X. Moreno ◽  
Dimas R. Vollet ◽  
Fabio S. de Vicente
Keyword(s):  
Thermal Stability ◽  
Silica Aerogels ◽  
Pluronic F127 ◽  
Modified Silica
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