The effect of micellization-induced deprotonation on the associative behavior of a carboxyl modified Pluronic P85

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F14%3A00432036" target="_blank" >RIV/61389013:_____/14:00432036 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1039/C4SM01337A" target="_blank" >http://dx.doi.org/10.1039/C4SM01337A</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/C4SM01337A" target="_blank" >10.1039/C4SM01337A</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The effect of micellization-induced deprotonation on the associative behavior of a carboxyl modified Pluronic P85

Popis výsledku v původním jazyce

Thermoresponsive polymeric surfactant CAE85 is a telechelic carboxyl group derivative of Pluronic P85 and its carboxyl end-groups undergo deprotonation into carboxylate groups upon micellization. Micelle formation and disintegration were studied here bymeans of small angle X-ray scattering, FTIR and Raman spectroscopy, quantum mechanical calculations and dynamical mechanical analysis. The deprotonation was observed in aqueous solutions of CAE85 for concentrations from 5 wt% to 30 wt% at temperatures above the corresponding critical micellization temperature (CMT). The most likely cause is a difference between the proton dissociation constant of the micelle (pKm) and the proton dissociation constant of the unimers in solution (pKa); our observations indicate that pKm < pKa. For concentrations up to 15 wt%, the presence of carboxylate groups in CAE85 lowered the CMT in comparison with P85. In addition, the behavior of CAE85 was generally not thermo-reversible and reproducible upon cooli

Název v anglickém jazyce

The effect of micellization-induced deprotonation on the associative behavior of a carboxyl modified Pluronic P85

Popis výsledku anglicky

Thermoresponsive polymeric surfactant CAE85 is a telechelic carboxyl group derivative of Pluronic P85 and its carboxyl end-groups undergo deprotonation into carboxylate groups upon micellization. Micelle formation and disintegration were studied here bymeans of small angle X-ray scattering, FTIR and Raman spectroscopy, quantum mechanical calculations and dynamical mechanical analysis. The deprotonation was observed in aqueous solutions of CAE85 for concentrations from 5 wt% to 30 wt% at temperatures above the corresponding critical micellization temperature (CMT). The most likely cause is a difference between the proton dissociation constant of the micelle (pKm) and the proton dissociation constant of the unimers in solution (pKa); our observations indicate that pKm < pKa. For concentrations up to 15 wt%, the presence of carboxylate groups in CAE85 lowered the CMT in comparison with P85. In addition, the behavior of CAE85 was generally not thermo-reversible and reproducible upon cooli

Druh

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

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GAP108%2F12%2F0703" target="_blank" >GAP108/12/0703: Biodegradovatelné nanokompozitní materiály na bázi celulózy připravené v iontových kapalinách</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Soft Matter

ISSN

1744-683X

e-ISSN

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Svazek periodika

10

Číslo periodika v rámci svazku

40

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

8011-8022

Kód UT WoS článku

000344998600013

EID výsledku v databázi Scopus

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