SANS study on the surfactant effect on nanophase separation in epoxy-based hydrogels prepared from alpha,omega-diamino terminated polyoxypropylene and polyoxyethylene bis(glycidyl ether)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10332048" target="_blank" >RIV/00216208:11320/16:10332048 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.eurpolymj.2016.10.049" target="_blank" >http://dx.doi.org/10.1016/j.eurpolymj.2016.10.049</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.eurpolymj.2016.10.049" target="_blank" >10.1016/j.eurpolymj.2016.10.049</a>

Result language

angličtina

Original language name

SANS study on the surfactant effect on nanophase separation in epoxy-based hydrogels prepared from alpha,omega-diamino terminated polyoxypropylene and polyoxyethylene bis(glycidyl ether)

Original language description

Effect of a cationic surfactant (myristyltrimethylamrhonium bromide, Ci4TAB) on swelling behaviour of epoxy network containing polyoxyethylene (POE) and polyoxypropylene (POP) and structure of resulting hydrogels was studied using small-angle neutron scattering (SANS). Nanophase separated structure of hydrogel prepared by swelling of the network in pure water was revealed. Characteristic length scale of the structure as measured by Bragg's distance is ca 78 angstrom. The structure consists of water-poor and water-rich nanodomains separated by a diffuse interface of effective thickness ca 5 angstrom. Presence of the surfactant in swelling solution has a strong effect on swelling behaviour of the epoxy network and structure of resulting hydrogels. At the macroscopic level, both, the swelling degree and surfactant uptake bythe network increase considerably with growing surfactant concentration in swelling solution. At the microscopic level, the two-phase nanophase separated structure is preserved, however, it becomes finer as expressed by a continuous decay of Bragg's distance from 78 angstrom (in absence of the surfactant) to 61 angstrom (highest surfactant concentration). Effective thickness of interface varies between ca 3-6 angstrom. Presence of the surfactant also induces variation of the neutron scattering length density at much longer length scale of ca 200-1200 angstrom. Strong binding of the surfactant to POP chains in epoxy network is responsible for the effects observed.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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Project

<a href="/en/project/GA13-23392S" target="_blank" >GA13-23392S: Designing and characterization of novel thermosensitive polymer hydrogels</a><br>

Continuities

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

Publication year

2016

Confidentiality

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

Name of the periodical

European Polymer Journal

ISSN

0014-3057

e-ISSN

—

Volume of the periodical

85

Issue of the periodical within the volume

Neuveden

Country of publishing house

GB - UNITED KINGDOM

Number of pages

14

Pages from-to

452-465

UT code for WoS article

000390497100039

EID of the result in the Scopus database

2-s2.0-84994480406