Thermal conductivity of porous silica films using modified polydimethylsiloxane and polyethyleneglycol as templates by sol–gel process

The sensor behavior of nanostructured doped silica films produced by sol-gel way were examined. Hygroscopic substances and polyoxometalates were used as additives to make more significant sensitive characteristics of initial matrix. Factors that have effect on sol preparation and films forming were investigated. Adsorption activity of the sensitive films was studied and it was shown that the films had a highly developed surface with nano-size pores. Change of initial conditions of sol-gel process gives opportunity to influence on kinetics of gel formation and consequently, on structure and properties of final materials. The study showed that the conditions of the environment affected the sensors characteristics markedly, which can be improved by choosing of the right procedure of forming and treatment. Influence of type and additive substances quantity into doped films was discussed in the paper

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Sol-gel process of non-linear optical silica films with organic chromophore as side chain

Journal of Materials Science ◽

10.1007/bf01152959 ◽

1996 ◽

Vol 31 (9) ◽

pp. 2443-2446 ◽

Cited By ~ 7

Author(s):

Po-Hou Sung ◽

Shao-Ling Wu ◽

Chien-Yang Lin

Keyword(s):

Sol Gel ◽

Side Chain ◽

Silica Films ◽

Sol Gel Process ◽

Non Linear ◽

Linear Optical ◽

Organic Chromophore

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Preparation of Porous Silica by Microemulsion Coupling with Sol-Gel Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.113-116.2266 ◽

2010 ◽

Vol 113-116 ◽

pp. 2266-2270

Author(s):

Jing Li ◽

Wei Xue ◽

Yong Zhao ◽

Zhi Miao Wang

Keyword(s):

Sol Gel ◽

Porous Silica ◽

Tetraethyl Orthosilicate ◽

Large Specific Surface Area ◽

Silicon Source ◽

Effect Of Solvent ◽

Texture Properties ◽

Sol Gel Process ◽

Novel Method ◽

Hcl Concentration

A novel method of microemulsion coupling with sol–gel process was used for preparation of porous silica using tetraethyl orthosilicate as silicon source. Effect of solvent and catalyst on the surface texture properties was investigated respectively. The results showed that porous silica with large specific surface area (738.65 m2/g) and high pore volume (2.01 cm3/g) was obtained. However, the mesopores in silica were arranged in disorder and showed great ununiformity in shape and arrangement. To obtain porous silica with desired texture properties, an appropriate dosage of ethanol and higher HCl concentration were needed.

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Structural, Optical, and pH-Stimulus Response Properties of Cresol Red Immobilized Nanocomposite Silica Films Derived by a Sol–Gel Process Employing Different Synthetic Routes

Industrial & Engineering Chemistry Research ◽

10.1021/ie500846z ◽

2014 ◽

Vol 53 (49) ◽

pp. 18863-18872 ◽

Cited By ~ 5

Author(s):

Shobhit Singh Chauhan ◽

R. V. Jasra ◽

A. L. Sharma

Keyword(s):

Sol Gel ◽

Silica Films ◽

Response Properties ◽

Stimulus Response ◽

Sol Gel Process ◽

Synthetic Routes ◽

Cresol Red

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Synthesis of bimodal porous silica from rice husk ash via sol–gel process using chitosan as template

Materials Letters ◽

10.1016/j.matlet.2007.09.004 ◽

2008 ◽

Vol 62 (10-11) ◽

pp. 1476-1479 ◽

Cited By ~ 59

Author(s):

T. Witoon ◽

M. Chareonpanich ◽

J. Limtrakul

Keyword(s):

Rice Husk ◽

Rice Husk Ash ◽

Sol Gel ◽

Porous Silica ◽

Sol Gel Process

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Characterization of porous silica gels prepared via the sol-gel process by29Si CP/MAS solid-state NMR spectroscopy

Molecular Physics ◽

10.1080/00268979000102101 ◽

1990 ◽

Vol 71 (4) ◽

pp. 769-780 ◽

Cited By ~ 23

Author(s):

K.L. Walther ◽

A. Wokaun ◽

A. Baiker

Keyword(s):

Solid State ◽

Nmr Spectroscopy ◽

Solid State Nmr ◽

Sol Gel ◽

Porous Silica ◽

Silica Gels ◽

Solid State Nmr Spectroscopy ◽

Sol Gel Process

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Study on the Dielectric Properties of Hybrid and Porous Polyimide-Silica Films

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.47-50.973 ◽

2008 ◽

Vol 47-50 ◽

pp. 973-976 ◽

Cited By ~ 1

Author(s):

Yi He Zhang ◽

Qing Song Su ◽

Li Yu ◽

Hong Zheng ◽

Hai Tao Huang ◽

...

Keyword(s):

Dielectric Constant ◽

Sol Gel ◽

Silica Particles ◽

Low Dielectric Constant ◽

Hybrid Films ◽

Porous Films ◽

Silica Films ◽

Low Dielectric ◽

Dimethyl Acetamide ◽

Sol Gel Process

A sol-gel process was used to prepare polyimide-silica hybrid films from the polyimide precursors and TEOS in N,N- dimethyl acetamide, then the hybrid film was treated with hydrofluoric acid to remove the dispersed silica particles, leaving pores with diameters between 80nm to 1µm, depending on the size of silica particles. The structure and dielectric constant of the hybrid and porous films were characterized by FTIR,SEM. The porous films displayed relatively low dielectric constant compared to the hybrid polyimide-silica films.

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