Coating of Uniform Inorganic Particles with Polymers, I

Oyama, Hideko T.; Sprycha, Ryszard; Xie, Yuming; Partch, Richard; Matijević, Egon

doi:10.1006/jcis.1993.1400

Cited by 49 publications

(26 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Matijevic et al reported the coating of aluminum hydrous oxide-modified silica particles with poly(divinylbenzene) (PDVB) layers by pre-treatment of the inorganic cores with coupling agents such as 4-vinylpyridine or 1-vinyl-2-pyrrolidone, followed by subsequent admixing of divinylbenzene and a radical initiator. [24] Polymer layers of poly(vinylbenzyl chloride) (PVBC), copolymers of PDVB± PVBC, and double shells of PDVB and PVBC were also synthesized around inorganic particles using a similar approach. [25] The surface characteristics of the silica cores were substantially altered, as evidenced by electrophoresis measurements.…”

Section: Surface Modification Via Polymerization Processesmentioning

confidence: 99%

“…Polymer coating of the particles allowed cores incorporating dyes (pigments) to be retained as the polymer shell is permeable to small inorganic ions but not to the dye molecules. [24] The use of electrochemical or soluble initiators can be eliminated by utilizing catalytically active cores to effect polymerization of monomers adsorbed on the surface of particles. This approach was employed to obtain poly(pyrrole) coatings on a range of inorganic cores by using the active sites on the metal oxide surfaces to initiate the polymerization of pyrrole.…”

Section: Surface Modification Via Polymerization Processesmentioning

confidence: 99%

See 1 more Smart Citation

Nanoengineering of Particle Surfaces

2001

View full text Add to dashboard Cite

The creation of core–shell particles is attracting a great deal of interest because of the diverse applicability of these colloidal particles; e.g., as building blocks for photonic crystals, in multi‐enzyme biocatalysis, and in drug delivery. This review presents the state‐of‐the‐art in strategies for engineering particle surfaces, such as the layer‐by‐layer deposition process (see Figure), which allows fine control over shell thickness and composition.

show abstract

Section: Surface Modification Via Polymerization Processesmentioning

confidence: 99%

Section: Surface Modification Via Polymerization Processesmentioning

confidence: 99%

Nanoengineering of Particle Surfaces

2001

View full text Add to dashboard Cite

show abstract

“…The CDVS treatment imparts hydrophobicity to the silica particle surfaces allowing for the better adsorption of monomer vapor on the silica templates. 10 The mixture solution was stirred overnight and then dried to obtain a powder form of the colloidal silica templates. The transmission electron microscopy (TEM) image of the CDVS-treated silica particles dried from water showed that the particles were nearly monodisperse and existed as single particles (Fig.…”

mentioning

confidence: 99%

A simple synthesis of mesoporous carbons with tunable mesopores using a colloidal template-mediated vapor deposition polymerization

2005

View full text Add to dashboard Cite

Mesoporous carbons with highly uniform and tunable mesopores were fabricated by one-step vapor deposition polymerization (VDP) using colloidal silica particles as templates and polyacrylonitrile (PAN) as a carbon precursor.Mesoporous carbons are used as catalysts, adsorbents and various supports. In particular, mesoporous carbons with narrow pore size distributions and tunable pore sizes are important in the field of size-selective separation, and can be applied as packing materials in chromatography or size-selective adsorbents. Recently, templating approaches have been extensively studied for the synthesis of mesoporous carbons using mesoporous and colloidal silicas as templates. Mesoporous silicas are representative porous silica templates. 1 Ryoo et al. reported the synthesis of ordered mesoporous carbons (CMKs) with high surface areas and large pore volumes from ordered mesoporous silica templates. 2 Compared to porous silica templating, the use of commercially available colloidal silicas as templates provides a more convenient way to fabricate mesoporous solids including carbons. 3 It does not require the pre-synthesis of suitable porous silica templates at a high cost and by a complicated synthetic procedure. Moreover, the pore diameter of the mesoporous carbon can be easily controlled using an appropriate colloidal silica, which is available in a wide range of particle sizes. Mallouk and co-workers synthesized mesoporous polymers with tunable pore sizes from colloidal silica templates. 4 Jaroniec and co-workers reported the synthesis of mesoporous carbons by a colloidal imprinting approach. 5 In colloidal silica templating, however, it is likely that silica aggregates composed of a few particles rather than a single silica particle act as templates for the formation of mesopores. 6 This leads to undesirable broadening of the pore size distribution in the resulting mesoporous carbon. 7 To date, impregnation of colloidal silica templates with carbon precursors has commonly depended on the wet chemical method, where the carbon precursor in the liquid state is inserted into the templates. Recently, our group reported that the vapor deposition polymerization (VDP) technique allows a simple route for the synthesis of inorganic-polymer and inorganic-carbon core-shell nanostructures by consecutive polymerization of vaporized monomer under vacuum onto the desired surface. 8 So far, VDP has been mainly performed to fabricate various thin films and core-shell nanostructures, 9 whereas considerably less attention has been paid to the application of VDP in colloidal templating. The VDP process makes it possible for monomer vapor to be polymerized even inside very small void spaces between colloidal particles without disrupting the characteristic of the colloidal template structure. In addition, it provides experimental simplicity such as a solvent-free system and no recovery process. In this communication, we report a simple route for the synthesis of mesoporous carbons with highly uniform and tunable mesopores using...

show abstract

“…[4][5][6] Accordingly, many results have been presented about the synthesis and properties of colloidal organic/inorganic composite materials. A wide variety of colloidal inorganic materials has been used for the polymer-based hybrid particles, including titanium dioxide, 7 copper oxide, 8 magnetic oxide, 9 aluminum hydroxide, 10 alumina, 11 clay, 12 carbon black, 13 and so on. Among them, silica is the mostly studied model system since it has a long-standing history as reinforcing filler in classical plastic or rubber materials.…”

Section: Introductionmentioning

confidence: 99%