Colloidal crystallization of colloidal silica grafted with iron(0) complex-tethered polymers in organic solvents

2007 ◽  
Author(s):  
Kohji Yoshinaga ◽  
Emiko Mouri
Keyword(s):  
Organic Solvents ◽  
Colloidal Silica ◽  
Colloidal Crystallization ◽  
Tethered Polymers

Colloidal crystallization of colloidal silica modified with ferrocenyl group-contained polymers in organic solvents

2007 ◽  
Vol 54 (1) ◽  
pp. 108-113 ◽  
Author(s):  
Kohji Yoshinaga ◽  
Maki Shigeta ◽  
Seishu Komune ◽  
Emiko Mouri ◽  
Akemi Nakai
Keyword(s):  
Organic Solvents ◽  
Colloidal Silica ◽  
Colloidal Crystallization ◽  
Ferrocenyl Group

Preparation of almost dispersant-free colloidal silica with superb dispersiblility in organic solvents and monomers

2011 ◽  
Vol 13 (9) ◽  
pp. 3885-3897 ◽  
Author(s):  
Feng-Hsi Huang ◽  
Chao-Ching Chang ◽  
Tai-Yueh Oyang ◽  
Ching-Chung Chen ◽  
Liao-Ping Cheng
Keyword(s):  
Organic Solvents ◽  
Colloidal Silica

Formation of colloid crystals from polymer-modified monodisperse colloidal silica in organic solvents

1999 ◽  
Vol 277 (5) ◽  
pp. 479-482 ◽  
Author(s):  
K. Yoshinaga ◽  
M. Chiyoda ◽  
A. Yoneda ◽  
H. Nishida ◽  
M. Komatsu
Keyword(s):  
Organic Solvents ◽  
Colloidal Silica ◽  
Monodisperse Colloidal Silica

UNTERSUCHUNGEN ÜBER DIE EXTRAKTION DES ROTEN KOBER-FARBSTOFFS DURCH ORGANISCHE LÖSUNGSMITTEL ZUR ÖSTROGENBESTIMMUNG IM HARN

1960 ◽  
Vol XXXV (I) ◽  
pp. 34-48 ◽  
Author(s):  
Gerd Ittrich
Keyword(s):  
Menstrual Cycle ◽  
Organic Solvents ◽  
Urine Sample ◽  
Phenol Derivatives ◽  
Organische Lösungsmittel ◽  
Colour Complex

ABSTRACT A series of organic solvents and phenol derivatives have been examined for the extraction of the pink Kober-colour complex. Optimal results could be achieved for fluorimetry by a solution of 2 % (w/v) p-nitrophenol and 1 % (v/v) ethanol in acetylenetetrabromide, when the green mercury line (546 mμ was used as primary light. The sensitivity, stability and specificity have been improved, compared with the previously described reaction. By changing the sequence of purification steps and by reducing the volume of the urine sample (5 ml) the method for the determination of total oestrogens has been simplified. Approximately 10 determinations can be done within 3–4 hours by one person. Recovery experiments and comparative determinations with a previously described method have been carried out. The excretion of total oestrogens in a complete menstrual cycle is determined with the described method.

UV Curable Organic-Inorganic Hybrid Materials

2000 ◽  
Vol 628 ◽  
Author(s):  
Guang-Way Jang ◽  
Ren-Jye Wu ◽  
Yuung-Ching Sheen ◽  
Ya-Hui Lin ◽  
Chi-Jung Chang
Keyword(s):  
Hybrid Materials ◽  
Colloidal Silica ◽  
Sol Gel ◽  
Solution Ph ◽  
Uv Curable ◽  
Inorganic Hybrid ◽  
Degradation Temperature ◽  
Sol Gel Process ◽  
The Stability ◽  
Thermal Degradation Temperature

This work successfully prepared an UV curable organic-inorganic hybrid material consisting of organic modified colloidal silica. Applications of UV curable organic-inorganic hybrid materials include abrasion resistant coatings, photo-patternable thin films and waveguides. Colloidal silica containing reactive functional groups were also prepared by reacting organic silane and tetraethyl orthosilicate (TEOS) using sol-gel process. In addition, the efficiency of grafting organic moiety onto silica nanoparticles was investigated by applying TGA and FTIR techniques. Experimental results indicated a strong interdependence between surface modification efficiency and solution pH. Acrylate-SiO2 hybrid formation could result in a shifting of thermal degradation temperature of organic component from about 200°C to near 400°C. In addition, the stability of organic modified colloidal silica in UV curable formula and the physical properties of resulting coatings were discussed. Furthermore, the morphology of organic modified colloidal silica was investigated by performing TEM and SEM studies‥

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