NMR Methods to Study Effects of Additives on Phase Separation of Thermoresponsive Polymer

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10286302" target="_blank" >RIV/00216208:11320/14:10286302 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1002/masy.201300130" target="_blank" >http://dx.doi.org/10.1002/masy.201300130</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/masy.201300130" target="_blank" >10.1002/masy.201300130</a>

Jazyk výsledku

angličtina

Název v původním jazyce

NMR Methods to Study Effects of Additives on Phase Separation of Thermoresponsive Polymer

Popis výsledku v původním jazyce

NMR methods including 1H NMR spectroscopy, 2D NOESY spectroscopy, pulsed-field gradient (PFG) NMR as well as spin-spin relaxation times T2 measurement were employed to study the effects of one surfactant (sodiumn-dodecyl sulfate, SDS) and three inorganicsalts (NaCl, Na2SO4, Na3PO4) on the phase transition of poly(Nisopropylacrylamide) (PNIPAM) in aqueous solution. The molecular interactions between SDS and PNIPAM during the coil-to-globule transition of PNIPAM have been accurately observed through 2D NOESY spectra and PFG NMR. Through the combination of 1H NMR spectra and T2 measurements, the salts effects have been found not only shift the phase transition of PNIPAM but also lead to difference in the final conformational state of PNIPAM in aqueous solution after phase transition. Diffusion coefficients of Na ? cations support the idea that the major effect of salts on phase transition of PNIPAM in aqueous solution is produced by anions.

Název v anglickém jazyce

NMR Methods to Study Effects of Additives on Phase Separation of Thermoresponsive Polymer

Popis výsledku anglicky

NMR methods including 1H NMR spectroscopy, 2D NOESY spectroscopy, pulsed-field gradient (PFG) NMR as well as spin-spin relaxation times T2 measurement were employed to study the effects of one surfactant (sodiumn-dodecyl sulfate, SDS) and three inorganicsalts (NaCl, Na2SO4, Na3PO4) on the phase transition of poly(Nisopropylacrylamide) (PNIPAM) in aqueous solution. The molecular interactions between SDS and PNIPAM during the coil-to-globule transition of PNIPAM have been accurately observed through 2D NOESY spectra and PFG NMR. Through the combination of 1H NMR spectra and T2 measurements, the salts effects have been found not only shift the phase transition of PNIPAM but also lead to difference in the final conformational state of PNIPAM in aqueous solution after phase transition. Diffusion coefficients of Na ? cations support the idea that the major effect of salts on phase transition of PNIPAM in aqueous solution is produced by anions.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

<a href="/cs/project/GA13-23392S" target="_blank" >GA13-23392S: Vývoj a charakterizace nových teplotně citlivých polymerních hydrogelů</a><br>

Návaznosti

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

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Macromolecular Symposia

ISSN

1022-1360

e-ISSN

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Svazek periodika

339

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

24-32

Kód UT WoS článku

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EID výsledku v databázi Scopus

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