Synthesis of polystyrene–silica composite particles via one-step nanoparticle-stabilized emulsion polymerization

Ma, Haichun; Dai, Lenore L.

doi:10.1016/j.jcis.2009.02.007

Cited by 32 publications

(22 citation statements)

References 54 publications

(63 reference statements)

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“…Ma and Dai [121] reported the synthesis of polystyrene latexes armored with silica nanoparticles (10-15 nm in diameter, PA-ST silica sol, Nissan Chemicals) via solids-stabilized emulsion polymerization. They used VA-086, 2,2 -azobis [2-methyl-N-(2-hydroxyethyl)propionamide], as nonionic initiator.…”

Section: Assembly Of Nanoparticles Onto the Surface Of Polymermentioning

confidence: 99%

Physical Methods for the Preparation of Hybrid Nanocomposite Polymer Latex Particles

Teixeira

Bon

2010

Hybrid Latex Particles

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In this chapter, we will highlight conceptual physical approaches towards the fabrication of nanocomposite polymer latexes in which each individual latex particle contains one or more "hard" nanoparticles, such as clays, silicates, titanates, or other metal(oxides). By "physical approaches" we mean that the "hard" nanoparticles are added as pre-existing entities, and are not synthesized in situ as part of the nanocomposite polymer latex fabrication process. We will narrow our discussion to focus on physical methods that rely on the assembly of nanoparticles onto the latex particles after the latex particles have been formed, or its reciprocal analogue, the adhesion of polymer onto an inorganic nanoparticle. First, will discuss the phenomenon of heterocoagulation and its various driving forces, such as electrostatic interactions, the hydrophobic effect, and secondary molecular interactions. We will then address methods that involve assembly of nanoparticles onto or around the more liquid precursors (i.e., swollen/growing latex particles or monomer droplets). We will focus on the phenomenon of Pickering stabilization. We will then discuss features of particle interaction with soft interfaces, and see how the adhesion of particles onto emulsion droplets can be applied in suspension, miniemulsion, and emulsion polymerization. Finally, we will very briefly mention some interesting methods that make use of interface-driven templating for making well-defined assembled clusters and supracolloidal structures.

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Section: Assembly Of Nanoparticles Onto the Surface Of Polymermentioning

confidence: 99%

Physical Methods for the Preparation of Hybrid Nanocomposite Polymer Latex Particles

Teixeira

Bon

2010

Hybrid Latex Particles

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“…The atomic ratio determined using XPS indicates the near-surface composites of the particles. 5,42 The C/Si atomic ratio of unmodified silica particles is 0.62; the C/Si atomic ratio of modified silica particles is 0.74, latter was greater than former. It shows that the surface composition of two kinds of silica particles is different.…”

Section: Modification Of Sio 2 Particlesmentioning

confidence: 99%

“…To solve this problem, Wu and coworkers 38 used a series of silane coupling agents to hydrophobize the silica particles and found that MPS-modified silica and VTS-modified silica could well disperse in styrene. Wang and coworkers 29 successfully used oleic acid to modify the silica for the first time; Dai and Ma 42 prepared PSsilica core-shell composite particles by one-step emulsion polymerization with a nonionic initiator VA-086; V. Ladmiral et al 43 made the surface modification of silica using an alkoxyamine derivative.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of SiO₂/PS composite particles via emulsion polymerization

Han

Wang

Zhu

et al. 2011

J of Applied Polymer Sci

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SiO 2 particles prepared by Stö ber method were modified using 1, 3,5,3,5,, and SiO 2 /polystyrene (PS) composite particles with core-shell structure were synthesized adopting mulsion polymerization of PS in a water-ethanol medium. The products were characterized by infrared spectra, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and Zetasizer analyzer. The average diameter of SiO 2 particles prepared by Stö ber method was about 80 nm, the SiO 2 particles were modified using the molar ratio of Vi-D 4 and SiO 2 particles 1 : 10 (the dosage of Vi-D 4 benever too much), and the size of modified silica particles was about 90 nm. The infrared spectra indicated that the Vi-D 4 had bonded to the silanol groups on surface of SiO 2 particles, and XPS indicated the grafting efficiency of Vi-D 4 on surface of SiO 2 particles had reached 90%. The infrared spectra indicated the PS had been incorporated with SiO 2 particles, and TEM indicated the composite particles have obvious core-shell structure. The suitable size of SiO 2 particles should be lower than 200 nm, and the optimum volume ratio of ethanol and water should be 1 : 9 or 1 : 4. A kind of monodisperse SiO 2 /PS composite particles having function of self-assembling was successfully and effectively synthesized.

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“…Such materials provide a new class of supramolecular building blocks and can "exhibit unusual, possibly unique, properties which cannot be obtained simply by co-mixing polymer and inorganic particles." (Barthet et al, 1999) In comparison with the recently reported methods to synthesize core-shell composite particles, for example, post-surface-reactio (Ding et al, 2004;Lynch et al, 2005), electrostatic deposition (Dokoutchaev et al, 1999), and layer-by-layer self-assembly (Caruso, 2001;Caruso et al, 1999;Caruso et al, 2001), we synthesize core-shell composite nanoparticles through a novel Pickering emulsion polymerization route (Ma and Dai, 2009;Ma et al, 2010). Figure 1 illustrates the polymerization route and its comparison with the conventional emulsion polymerization.…”

Section: Introductionmentioning

confidence: 99%

Advanced Core-Shell Composite Nanoparticles Through Pickering Emulsion Polymerization

Dai¹

2012

The Delivery of Nanoparticles

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Synthesis of polystyrene–silica composite particles via one-step nanoparticle-stabilized emulsion polymerization

Cited by 32 publications

References 54 publications

Physical Methods for the Preparation of Hybrid Nanocomposite Polymer Latex Particles

Physical Methods for the Preparation of Hybrid Nanocomposite Polymer Latex Particles

Synthesis of SiO₂/PS composite particles via emulsion polymerization

Advanced Core-Shell Composite Nanoparticles Through Pickering Emulsion Polymerization

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Synthesis of polystyrene–silica composite particles via one-step nanoparticle-stabilized emulsion polymerization

Cited by 32 publications

References 54 publications

Physical Methods for the Preparation of Hybrid Nanocomposite Polymer Latex Particles

Physical Methods for the Preparation of Hybrid Nanocomposite Polymer Latex Particles

Synthesis of SiO2/PS composite particles via emulsion polymerization

Advanced Core-Shell Composite Nanoparticles Through Pickering Emulsion Polymerization

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Synthesis of SiO₂/PS composite particles via emulsion polymerization