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Hwang, D. K.; Moon, Ju Hyung; Shul, Yong Gun; Jung, Ki-Uk; Kim, D.H.; Lee, D.W.

doi:10.1023/a:1020774927773

Cited by 124 publications

(45 citation statements)

References 4 publications

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“…Nanoparticles constitute the disperse phase in nanocomposites improving optical, mechanical, thermal or handling properties, i.e., for UV protection [1] or translucency of dental materials [2]. Inorganic nanoparticles are synthesized mainly by flame technology [3] which leads to agglomerated powders (e.g., fumed silica and titania).…”

Section: Introductionmentioning

confidence: 99%

Turbulent hydrodynamic stress induced dispersion and fragmentation of nanoscale agglomerates

Wengeler

Nirschl

2007

Journal of Colloid and Interface Science

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High pressure dispersion nozzles of 2.5-10 mm length and 125 µm diameter have been characterized in terms of fluid dynamics and dispersion experiments at 100-1400 bar. Elongational stresses at the nozzle entry (5 × 10 5 Pa) and turbulent stresses up to 10 5 Pa at a Reynolds number of 25,000 in turbulent channel flow are identified crucial for desagglomeration and aggregate fragmentation. Maximum stresses are calculated on representative particle tracks and related to agglomerate breakage. Agglomerates in the experimental study are in the range of the Kolmogorov micro scale (100-400 nm) and therefore break due to turbulent energy dissipation in viscous flow. Bond strength distributions could be determined experimentally from particle size distributions and fluid dynamics simulations, with primary particle erosion determined as dispersion mechanism for diffusion flame silica particles. Nanoscale agglomerates show a power law scaling for breakage with scaling exponents diverging from theory of floc dispersion. This is attributed to their strong bonding by sinter necks.

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Section: Introductionmentioning

confidence: 99%

Turbulent hydrodynamic stress induced dispersion and fragmentation of nanoscale agglomerates

Wengeler

Nirschl

2007

Journal of Colloid and Interface Science

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“…As a subdivision part of nanocomposites, UV-curable nanocomposites combine the advantages of UV curing process and nanotechnology together and therefore impart the materials some unique properties, 6,7 finally getting a wide-range usage in the fields such as coatings, printings, inks, adhesives and so on. 8,9 Although there are many papers focusing on the kinetics of conventional UV-curable coatings, 10,11 few have ever been concerned with the kinetics of UV-curable nanocomposites coatings. The reported research work mainly concentrates on the synthesis and characterization of the resultant UV-curable nanocomposites films.…”

Section: Introductionmentioning

confidence: 99%

Kinetic investigations on the UV‐induced photopolymerization of nanocomposites by FTIR spectroscopy

Zhou

You

et al. 2005

J of Applied Polymer Sci

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ABSTRACT:The kinetics of the photopolymerization for nanocomposites containing nanosilica with 2,2-dimethoxy-1,2-diphenylethan-1-one or benzophenone/n-methyl diethanolamine (BP/MDEA)as photoinitiators were studied by FTIR spectroscopy. It was found that nanocomposites containing nanosilica had higher conversion in comparison with pristine EA. The presence of MPS and ethanol accelerated the photopolymerization of nanocomposites, while the presence of water decelerated it. The photopolymerization of nanocomposites was more sensitive to oxygen than that of pristine EA.

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“…Moreover, they usually contain some special properties of nanoparticles, and consequently, can be widely used in many fields, such as plastics, rubbers, coatings, inks, etc. [1][2][3][4][5] UVcurable process has some advantages (fast, environment friendly, energy saving, etc. ), and can be used to cure nanocomposites for coatings, printings, inks, adhesives, and for other fields.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of UV‐curable MPS‐modified silica nanocomposite coats

Li¹,

Zhou²,

Wu³

2005

J of Applied Polymer Sci

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A series of UV-curable nanocomposites were prepared with 3-(trimethoxysilyl) propyl methacrylate (MPS) modified nanosilica under the initiation of 2,2-dimethoxy-1,2-diphenylethan-1-one. It was found that MPS-modified nanosilica together with free MPS could form transparent nanocomposite coats. As the particle size of nanosilica increased, the photopolymerization rate, final double bond conversion, and tack-free time of nanocomposites increased while the surface roughness, glass-transition temperature, and UV absorbance of nanocomposites decreased.

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Cited by 124 publications

References 4 publications

Turbulent hydrodynamic stress induced dispersion and fragmentation of nanoscale agglomerates

Turbulent hydrodynamic stress induced dispersion and fragmentation of nanoscale agglomerates

Kinetic investigations on the UV‐induced photopolymerization of nanocomposites by FTIR spectroscopy

Preparation and characterization of UV‐curable MPS‐modified silica nanocomposite coats

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