Kinetics of supramolecular crystallization of concentrated suspensions of monodisperse spherical silica particles

Serdobintseva, V. V.; Danilyuk, A.F.; Vosel, S. V.; Калинин, Д. В.

doi:10.1007/bf02475528

Cited by 7 publications

(2 citation statements)

References 5 publications

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“…Figure5A,B had a diameter of 290 nm from DLS while 110 nm from TEM images, which was due to the existence of flocculation between hybrid microspheres. This flocculation could be cleaved again under intense mechanical stirring, which showed the typical thixotropic properties, confirming that supramolecular crystals formed in the concentrated silica suspension according to the literature 30. Formation Mechanism of the PMMA/SiO 2 Hybrid Microspheres.…”

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confidence: 80%

“…Furthermore, the sample of This flocculation could be cleaved again under intense mechanical stirring, which showed the typical thixotropic properties, confirming that supramolecular crystals formed in the concentrated silica suspension according to the literature. 30 Formation Mechanism of the PMMA/SiO 2 Hybrid Microspheres. To understand the formation mechanism of raspberry-like PMMA/SiO 2 hybrid microspheres, control experiments without either silica or MTC were carried out.…”

Section: Resultsmentioning

confidence: 99%

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A Novel Preparation Method of Raspberry-like PMMA/SiO₂ Hybrid Microspheres

et al. 2005

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This paper presents a novel method for preparation of raspberry-like organic−inorganic hybrid microspheres with PMMA as core and nanosilica particles as shell. A cationic monomer, 2-(methacryloyl)ethyltrimethylammonium chloride (MTC), was used as an auxiliary monomer, and nanosilica particles were deposited onto the surfaces of organic particles in aqueous medium via electrostatic interaction between nanosilica particles and MTC. The whole process required neither surface treatment for nanosilica particles nor additional surfactant or stabilizer. TEM indicated that electrostatic interaction between negatively charged silica and positively charged MTC was strong enough for the formation of colloidally stable hybrid microspheres with raspberry-like morphology. The average particle sizes and the final silica contents of the hybrid microspheres ranged from 180 to 600 nm and 15 to 60 wt %, respectively. A possible formation mechanism of the raspberry-like hybrid microspheres was proposed on the basis of the effects of some influencing parameters, for instance, diameters and amount of the silica particles, MTC and APS concentration on the polymerization stability, diameters, silica content, and morphology of the hybrid microspheres.

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confidence: 80%

Section: Resultsmentioning

confidence: 99%