Phase separation behavior of encapsulated liquid crystals in monodispersed acetalized poly(methylmethacrylate) particles

Park, Sung-Il; Park, No-Hyung; Suh, Kyung‐Do

doi:10.1007/s00396-002-0713-0

Cited by 5 publications

(5 citation statements)

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“…In this experiment, dispersion polymerization was used and this provided highly monodisperse polymer seed particles. The EL materials were successfully encapsulated into the seed particles by employing a solute co-diffusion method (SCM), [14][15][16][17] while maintaining both the colloidal Scheme 1. Encapsulation procedure using solute co-diffusion method (SCM).…”

Section: Resultsmentioning

confidence: 99%

“…In this experiment, dispersion polymerization was used and this provided highly monodisperse polymer seed particles. The EL materials were successfully encapsulated into the seed particles by employing a solute co‐diffusion method (SCM),14–17 while maintaining both the colloidal stability and the monodispersity of the size distribution. The thermal stability of the EL encapsulated polymer particle was determined using thermogravimetric analysis (TGA, Perkin‐Elmer TGA‐7) under a nitrogen atmosphere.…”

Section: Resultsmentioning

confidence: 99%

“…The encapsulation of the EL components was executed by employing the solute co-diffusion method (SCM). [14][15][16][17] First, poly(MMA-co-VC) seed particles were dispersed in 40 g of SM solution which contained ethanol and 0.25 wt.-% SDS in aqueous solution (1:4 w/w). A homogeneous mixture of Alq 3 , NPD and MC was emulsified in 15 g of SM solution by homogenizing it at 20 000 rpm for 5 min with ultrasonification.…”

Section: Preparation Of Poly(mma-co-vc) Particlesmentioning

confidence: 99%

“…The encapsulation of the EL components was executed by employing the solute co‐diffusion method (SCM) 14–17. First, poly(MMA‐ co ‐VC) seed particles were dispersed in 40 g of SM solution which contained ethanol and 0.25 wt.‐% SDS in aqueous solution (1:4 w/w).…”

Section: Experimental Partmentioning

confidence: 99%

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Novel Light Emitting Diode Using Organic Electroluminescence Microcapsules

Heo¹,

Park²,

Ryu³

et al. 2003

Macro Chemistry & Physics

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Novel light emitting diodes (LEDs) were prepared using electroluminescence (EL) material/polymer microcapsules (ELC). N‐vinylcarbazole as a hole‐transporting component and methyl methacrylate (MMA) were copolymerized for producing the seed particles using dispersion polymerization. An oxadiazole derivative, synthesized as a electron‐transporting component, and tris(8‐hydroxyquinolinato) aluminium(III) (Alq3) were incorporated into the polymer particles by using the solute co‐diffusion method (SCM). The LEDs for the EL characterization were fabricated in a thin sandwich configuration: Al anode/ELC/ITO cathode. The surface imaging of the LED prepared using ELC was performed by atomic force microscopy (AFM). The EL characteristics of the ELC were investigated by UV, photoelectron and luminescence spectroscopy, and the current‐voltage and the light‐voltage characteristics for the LED were determined.

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Section: Resultsmentioning

confidence: 99%

“…In this experiment, dispersion polymerization was used and this provided highly monodisperse polymer seed particles. The EL materials were successfully encapsulated into the seed particles by employing a solute co‐diffusion method (SCM),14–17 while maintaining both the colloidal stability and the monodispersity of the size distribution. The thermal stability of the EL encapsulated polymer particle was determined using thermogravimetric analysis (TGA, Perkin‐Elmer TGA‐7) under a nitrogen atmosphere.…”

Section: Resultsmentioning

confidence: 99%

Section: Preparation Of Poly(mma-co-vc) Particlesmentioning

confidence: 99%

Section: Experimental Partmentioning

confidence: 99%

See 2 more Smart Citations

Novel Light Emitting Diode Using Organic Electroluminescence Microcapsules

Heo¹,

Park²,

Ryu³

et al. 2003

Macro Chemistry & Physics

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“…On the other hand, physical approach does not need to perform a complicated reaction and is easy to control the microcapsule morphologies compared with chemical approach. Thus, it has been employed widely to fabricate microcapsules, for example, coacervation [12][13][14], double emulsion/solvent evaporation [15][16][17], solvent exchange [18,19], solute co-diffusion [20][21][22], layer-by-layer self-assembly [23][24][25] and so on. However, in these methods there still exist such disadvantages as lack of uniformity of the shell thickness, low encapsulation efficiency and exceedingly time-consuming.…”

Section: Introductionmentioning

confidence: 99%

Preparation of fluorescent poly(methylmethacrylate) nano capsules via internal phase separation

Lv¹,

Lin²,

Yao³

et al. 2007

E-Polymers

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Fluorescent nanocapsules containing Eu3+ complex are prepared by the internal phase separation of poly(methylmethacrylate) (PMMA) within the droplets of oil/water nano-emulsion. The nanocapsules give bright red emission excited by UV irradiation and possess stable fluorescence properties. Their fluorescence intensity is primarily influenced by the emulsifier concentration. It is significant that the fluorescence of the nanocapsules is nearly pH-independent and can be kept for a long time in a wide pH range. In contrast, the fluorescence of Eu 3+ complex is easily quenched in acidic or alkalic medium. The mean nanocapsule size is tunable with the concentration and the mode of emulsifier addition. As soft templates, oil cores have potential applications for the incorporation of functional components or drugs.

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