Effect of Multivalency on the Performance of Enantioselective Separation Media for Chiral HPLC Prepared by Linking Multiple Selectors to a Porous Polymer Support via Aliphatic Dendrons

2002 ◽  
Vol 67 (7) ◽  
pp. 1993-2002 ◽  
Author(s):  
Frank H. Ling ◽  
Victor Lu ◽  
Frantisek Svec ◽  
Jean M. J. Fréchet
Keyword(s):  
Porous Polymer ◽  
Polymer Support ◽  
Chiral Hplc ◽  
Enantioselective Separation ◽  
Separation Media

Imaging Switchable Protein Interactions with an Active Porous Polymer Support

2020 ◽  
Vol 124 (22) ◽  
pp. 4412-4420 ◽  
Author(s):  
Chayan Dutta ◽  
Logan D. C. Bishop ◽  
Jorge Zepeda O ◽  
Sudeshna Chatterjee ◽  
Charlotte Flatebo ◽  
...  
Keyword(s):  
Protein Interactions ◽  
Porous Polymer ◽  
Polymer Support

Silver nanoparticles stabilized in porous polymer support: A highly active catalytic nanoreactor

2016 ◽  
Vol 524 ◽  
pp. 214-222 ◽  
Author(s):  
Sabyasachi Patra ◽  
Apurva N. Naik ◽  
Ashok K. Pandey ◽  
Debasis Sen ◽  
S. Mazumder ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Porous Polymer ◽  
Polymer Support ◽  
Highly Active

Imaging Switchable Protein Interactions With an Active Porous Polymer Support

2020 ◽  
Author(s):  
Chayan Dutta ◽  
Logan D. C. Bishop ◽  
Jorge Zepeda O ◽  
Sudeshna Chatterjee ◽  
Charlotte Flatebo ◽  
...  
Keyword(s):  
Protein Interactions ◽  
Porous Polymer ◽  
Polymer Support

scholarly journals Design of a Semi-Continuous Selective Layer Based on Deposition of UiO-66 Nanoparticles for Nanofiltration

Membranes ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 129 ◽  
Author(s):  
Goji Shangkum ◽  
Patchanee Chammingkwan ◽  
Dai Trinh ◽  
Toshiaki Taniike
Keyword(s):  
External Surface ◽  
Metal Organic Framework ◽  
Composite Membranes ◽  
Porous Polymer ◽  
Water Filtration ◽  
Polymer Support ◽  
Particle Sizes ◽  
External Surface Area ◽  
Selective Layer ◽  
Metal Organic

Deposition of UiO-66 metal–organic framework nanoparticles onto a porous polymer support is a promising approach to designing highly-permeable, size-selective, flexible, and stable membranes for water filtration. In this article, a series of UiO-66 nanoparticles having different particle sizes were synthesized and employed to prepare UiO-66-deposited composite membranes. It was found that the size of the UiO-66 nanoparticles had great influences on the performance of the composite membranes for the filtration of a methylene blue aqueous solution. The deposition of smaller nanoparticles afforded a selective layer having a greater external surface area and narrower interparticle voids. These features made the deposition of smaller nanoparticles more advantageous in terms of the flux and rejection, while the deposition of greater nanoparticles afforded a selective layer more tolerant for fouling. Bimodal composite membranes were prepared by depositing mixed UiO-66 nanoparticles of smaller and bigger sizes. These membranes successfully combined the advantages of nanoparticles of a distinct size.

SEM analysis of in situ polymerization products for chromatographic separations

1996 ◽  
Vol 54 ◽  
pp. 176-177
Author(s):  
Bruce Cutler ◽  
Joseph Algaier ◽  
Frantisek Svec
Keyword(s):  
In Situ Polymerization ◽  
Sem Analysis ◽  
Single Step ◽  
Porous Polymer ◽  
Hplc Separation ◽  
Chromatographic Separations ◽  
Peak Broadening ◽  
Void Volumes ◽  
Separation Media ◽  
Separation Of Proteins

Two inherent problems associated with chromatographic separations are peak broadening and column efficiency. These are directly attributable to the interparticular porosity of the separation media in which limited utilization of column space results in column void volumes. In theory, a minimum of 26% void volume will occur if a column is packed using perfectly arranged monodispersed beads. Typically, with the best packed columns void volumes are 30 to 40%. Svec and Fréchet have introduced an HPLC separation media with no discontinuity that are prepared in a single step by a free-radical polymerization within a column acting as a mold. The resulting rods consist of a continuous molded monolith of rigid, highly porous polymer. These columns proved to be very efficient and extremely fast for reverse-phase HPLC separation of proteins and for the separation of small and mid-size molecules. In this study, we continue to explore various reaction conditions with the resulting polymerization products examined by SEM, for internal morphology.

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