ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTContinuous rods of macroporous polymer as high-performance liquid chromatography separation mediaFrantisek. Svec and Jean M. J. FrechetCite this: Anal. Chem. 1992, 64, 7, 820–822Publication Date (Print):April 1, 1992Publication History Published online1 May 2002Published inissue 1 April 1992https://doi.org/10.1021/ac00031a022RIGHTS & PERMISSIONSArticle Views2584Altmetric-Citations840LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant...

The porosity and flow characteristics of macroporous polymer monoliths that may be used to prepare separation media, flow-through reactors, catalysts, or supports for solid-phase chemistry can controlled easily during their preparation. Key variables such as temperature, composition the pore-forming solvent mixture, content cross-linking divinyl monomer allow tuning average pore size within a broad range spanning 2 orders magnitude. polymerization through its effects on kinetics...

Rigid, monolithic capillary columns for reversed-phase electrochromatography have been prepared within the confines of untreated fused-silica capillaries in a single step by simple copolymerization ethylene dimethacrylate, butyl methacrylate, and 2-acrylamido-2-methyl-1-propanesulfonic acid presence porogenic solvent. The composition specifically designed ternary solvent allows fine control porous properties material over broad range. While electroosmotic flow through these increases with...

Monolithic columns for capillary electrochromatography have been prepared within the confines of untreated fused-silica capillaries in a single step by simple copolymerization mixtures butyl methacrylate, ethylene dimethacrylate, and 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) presence porogenic solvent. The use these novel macroporous monoliths eliminates need frits, difficulties encountered with packed capillaries, surface functionalization. Since porous properties monolithic...

ADVERTISEMENT RETURN TO ISSUEPREVFEATURESNEXTMonolithic Materials: Promises, Challenges, AchievementsFrantisek Svec and Christian G. HuberCite this: Anal. Chem. 2006, 78, 7, 2100–2107Publication Date (Web):April 1, 2006Publication History Published online1 April 2006Published inissue 1 2006https://pubs.acs.org/doi/10.1021/ac069383vhttps://doi.org/10.1021/ac069383vnewsACS Publications. This publication is available under these Terms of Use. Request reuse permissions free to access through...

ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTAdvances and Recent Trends in the Field of Monolithic Columns for ChromatographyFrantisek Svec* Yongqin LvView Author Information International Research Center Soft Matter, Beijing University Chemical Technology, 100029 Beijing, China*E-mail: [email protected]. Phone: +1 510 418 5174.Cite this: Anal. Chem. 2015, 87, 1, 250–273Publication Date (Web):November 6, 2014Publication History Published online18 November 2014Published inissue 6 January...

Hydrogen adsorption using a series of nanoporous synthetic polymers has been studied. Promising results were obtained during the screening commercially available porous polymer beads; considered, hypercrosslinked Hypersol-Macronet MN200 resin exhibited highest capacity for hydrogen. This initial success triggered development our own high surface area materials. Subjecting gel-type and macroporous vinylbenzyl chloride-based precursors swollen in dichloroethane to Friedel−Crafts reaction...

Abstract Here, a facile and inexpensive approach to superhydrophobic polymer coatings is presented. The method involves the in situ polymerization of common monomers presence porogenic solvent afford surfaces with desired combination micro‐ nanoscale roughness. applicable variety substrates not limited small areas or flat surfaces. polymerized material can be ground into powder, which, once applied surface, renders it superhydrophobic. morphology porous structure efficiently controlled by...

A method for the preparation of an entirely new type nanoporous material, hypercrosslinked polyaniline, with permanent porous structure and specific surface areas exceeding 630 m2 g−1 has been developed. The hypercrosslinking reaction was carried out commercial polyaniline diiodoalkanes or paraformaldehyde using both conventional microwave assisted processes. Polyaniline swollen in organic solvent to form a rigid, mesh-like porosity high area. resulting materials were characterized infrared...

Monolithic porous polymers have been prepared by photoinitiated polymerization within the channels of a microfluidic device and used for on-chip solid-phase extraction preconcentration. The preparation monolithic material with hydrophobic ionizable surface chemistries is easily achieved copolymerization butyl methacrylate ethylene dimethacrylate, or 2-hydroxyethyl [2-(methacryloyloxy)ethyl]trimethylammonium chloride respectively. properties, consequently flow resistance, are controlled use...

Enzymatic microreactors have been prepared in capillaries and on microfluidic chips by immobilizing trypsin porous polymer monoliths consisting of 2-vinyl-4,4-dimethylazlactone, ethylene dimethacrylate, acrylamide or 2-hydroxyethyl methacrylate. The azlactone functionalities react readily with amine thiol groups the enzyme to form stable covalent bonds. optimized properties lead very low back pressures enabling use simple mechanical pumping carry out both immobilization from its solution...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetic Control of Pore Formation in Macroporous Polymers. "Molded" Porous Materials with High Flow Characteristics for Separations or CatalysisFrantisek Svec and Jean M. J. FrechetCite this: Chem. Mater. 1995, 7, 4, 707–715Publication Date (Print):April 1, 1995Publication History Published online1 May 2002Published inissue 1 April 1995https://pubs.acs.org/doi/10.1021/cm00052a016https://doi.org/10.1021/cm00052a016research-articleACS...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMacroporous polymeric stationary-phase rod as continuous separation medium for reversed-phase chromatographyQ. Ching. Wang, Frantisek. Svec, and Jean M. J. FrechetCite this: Anal. Chem. 1993, 65, 17, 2243–2248Publication Date (Print):September 1, 1993Publication History Published online1 May 2002Published inissue 1 September 1993https://pubs.acs.org/doi/10.1021/ac00065a013https://doi.org/10.1021/ac00065a013research-articleACS PublicationsRequest...

In the area of crosslinked chemical supports, continuous media such as rigid macroporous polymer monoliths have certain advantages. Following an introduction to monolithic porous materials, various applications are reviewed. The Figure shows SEM image a monolith prepared within confines polyimide-coated fused silica capillary.

The photografting of porous three-dimensional materials has been achieved using a benzophenone-initiated surface photopolymerization within the pores macroporous polymer monolith contained in fused silica capillary. Despite relatively high thickness (100 μm or more) layer material involved, process occurs efficiently throughout its cross section as confirmed by electron probe microanalysis. In addition, use photomasks during grafting enables precise placement specific functionalities...

A simple molding process carried out within the confines of a closed mold has been used for preparation porous polymer monoliths. The polymerization is using mixture monomers, porogenic solvent, and free-radical initiator under conditions that afford macroporous materials with through-pores or channels large enough to provide high flow characteristics required their applications. versatility technique demonstrated by its use both hydrophobic hydrophilic monomers such as styrene,...

Photoinitiated free radical polymerization has been used for the preparation of porous polymer monoliths within UV transparent fused silica capillaries and quartz tubes. These formats were as models separation media channels microfabricated devices. A mixture ethylene dimethacrylate, butyl methacrylate, 2-acrylamido-2-methyl-1-propanesulfonic acid was polymerized in presence a porogenic solvent consisting 1-propanol, 1,4-butanediol, water at room temperature under irradiation. Modification...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTemperature, a Simple and Efficient Tool for the Control of Pore Size Distribution in Macroporous PolymersFrantisek Svec Jean M. J. FrechetCite this: Macromolecules 1995, 28, 22, 7580–7582Publication Date (Print):October 1, 1995Publication History Published online1 May 2002Published inissue 1 October 1995https://pubs.acs.org/doi/10.1021/ma00126a044https://doi.org/10.1021/ma00126a044research-articleACS PublicationsRequest reuse permissionsArticle...