Phase transition in hydrogels of thermoresponsive semi-interpenetrating and interpenetrating networks of poly(N,N-diethylacrylamide) and polyacrylamide

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F16%3A00463812" target="_blank" >RIV/61389013:_____/16:00463812 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/16:10332041

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.eurpolymj.2016.10.010" target="_blank" >http://dx.doi.org/10.1016/j.eurpolymj.2016.10.010</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.eurpolymj.2016.10.010" target="_blank" >10.1016/j.eurpolymj.2016.10.010</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Phase transition in hydrogels of thermoresponsive semi-interpenetrating and interpenetrating networks of poly(N,N-diethylacrylamide) and polyacrylamide

Popis výsledku v původním jazyce

Temperature-induced phase transition in hydrogels of semi-interpenetrating (SIPNs) and interpenetrating (IPNs) polymer networks of thermoresponsive poly(N,N-diethylacrylamide) (PDEAAm) and hydrophilic polyacrylamide (PAAm) was studied by a combination of 1H NMR spectroscopy, small-angle neutron scattering (SANS) and DSC. The effect of various network composition and reverse sequence in the preparation procedure of the network on the volume phase transition was examined. Transition temperature linearly increased with the content of PAAm component in SIPNs and IPNs. SANS results revealed in investigated SIPN and IPN hydrogels two types of regions (aggregates), small and large. At temperature above the phase transition the small and large regions are related to compact multi-chain aggregates with smooth and fuzzy surface, respectively. From NMR results it follows that the individual polymer groups participated in the transition to various extent dependently on the type of hydrogel preparation. We found that parameters of the phase transition are tunable not only by composition of the SIPNs and IPNs but also by the preparation process. A certain portion of water bound in globular structures and a slow exchange regime between “bound and “free water were established by NMR methods for all investigated SIPNs and IPNs hydrogels.

Název v anglickém jazyce

Phase transition in hydrogels of thermoresponsive semi-interpenetrating and interpenetrating networks of poly(N,N-diethylacrylamide) and polyacrylamide

Popis výsledku anglicky

Temperature-induced phase transition in hydrogels of semi-interpenetrating (SIPNs) and interpenetrating (IPNs) polymer networks of thermoresponsive poly(N,N-diethylacrylamide) (PDEAAm) and hydrophilic polyacrylamide (PAAm) was studied by a combination of 1H NMR spectroscopy, small-angle neutron scattering (SANS) and DSC. The effect of various network composition and reverse sequence in the preparation procedure of the network on the volume phase transition was examined. Transition temperature linearly increased with the content of PAAm component in SIPNs and IPNs. SANS results revealed in investigated SIPN and IPN hydrogels two types of regions (aggregates), small and large. At temperature above the phase transition the small and large regions are related to compact multi-chain aggregates with smooth and fuzzy surface, respectively. From NMR results it follows that the individual polymer groups participated in the transition to various extent dependently on the type of hydrogel preparation. We found that parameters of the phase transition are tunable not only by composition of the SIPNs and IPNs but also by the preparation process. A certain portion of water bound in globular structures and a slow exchange regime between “bound and “free water were established by NMR methods for all investigated SIPNs and IPNs hydrogels.

Druh

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

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

—

Projekt

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

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

European Polymer Journal

ISSN

0014-3057

e-ISSN

—

Svazek periodika

85

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

1-13

Kód UT WoS článku

000390497100001

EID výsledku v databázi Scopus

2-s2.0-84991594264