Monolithic stationary phases with a longitudinal gradient of porosity

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F17%3A39911216" target="_blank" >RIV/00216275:25310/17:39911216 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1002/jssc.201700048" target="_blank" >http://dx.doi.org/10.1002/jssc.201700048</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/jssc.201700048" target="_blank" >10.1002/jssc.201700048</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Monolithic stationary phases with a longitudinal gradient of porosity

Popis výsledku v původním jazyce

The duration of the hypercrosslinking reaction has been used to control the extent of small pores formation in polymer-based monolithic stationary phases. Segments of five columns hypercrosslinked for 30-360 min were coupled via zero-volume unions to prepare columns with segmented porosity gradients. The steepness of the porosity gradient affected column efficiency, mass transfer resistance, and separation of both small-molecule alkylbenzenes and high-molar-mass polystyrene standards. In addition, the segmented column with the steepest porosity gradient was prepared as a single column with a continuous porosity gradient. The steepness of porosity gradient in this type column was tuned. Compared to a completely hypercrosslinked column, the column with the shallower gradient produced comparable size-exclusion separation of polystyrene standards but allowed higher column permeability. The completely hypercrosslinked column and the column with porosity gradient were successfully coupled in online two-dimensional liquid chromatography of polymers.

Název v anglickém jazyce

Monolithic stationary phases with a longitudinal gradient of porosity

Popis výsledku anglicky

The duration of the hypercrosslinking reaction has been used to control the extent of small pores formation in polymer-based monolithic stationary phases. Segments of five columns hypercrosslinked for 30-360 min were coupled via zero-volume unions to prepare columns with segmented porosity gradients. The steepness of the porosity gradient affected column efficiency, mass transfer resistance, and separation of both small-molecule alkylbenzenes and high-molar-mass polystyrene standards. In addition, the segmented column with the steepest porosity gradient was prepared as a single column with a continuous porosity gradient. The steepness of porosity gradient in this type column was tuned. Compared to a completely hypercrosslinked column, the column with the shallower gradient produced comparable size-exclusion separation of polystyrene standards but allowed higher column permeability. The completely hypercrosslinked column and the column with porosity gradient were successfully coupled in online two-dimensional liquid chromatography of polymers.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/GA14-22426S" target="_blank" >GA14-22426S: Vývoj multifunkční monolitické kapilární kolony s integrovanou úpravou vzorku, separací a elektrochemickou detekcí</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Separation Science

ISSN

1615-9306

e-ISSN

—

Svazek periodika

40

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

7

Strana od-do

1703-1709

Kód UT WoS článku

000399783300009

EID výsledku v databázi Scopus

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