Advanced two-step cryopolymerization to form superporous thermosensitive PNIPA/clay gels with unique mechanical properties and ultrafast swelling-deswelling kinetics

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F18%3A00488688" target="_blank" >RIV/61389013:_____/18:00488688 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1007/s00396-018-4289-8" target="_blank" >http://dx.doi.org/10.1007/s00396-018-4289-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00396-018-4289-8" target="_blank" >10.1007/s00396-018-4289-8</a>

Result language

angličtina

Original language name

Advanced two-step cryopolymerization to form superporous thermosensitive PNIPA/clay gels with unique mechanical properties and ultrafast swelling-deswelling kinetics

Original language description

The superporous thermosensitive PNIPA/clay hydrogels were prepared by the advanced two-step freezing polymerization. The formation and properties of the cryogels were controlled by freezing conditions, such as time of freezing during the two-step polymerization and the rate of cooling. The freezing of the reaction mixture in different well-defined stages of structure evolution during polymerization made it possible to fine tune the structure, morphology, and properties of cryogels. The development of structure during polymerization was followed by NMR and chemorheology, and moreover, the morphology, porosity, swelling behavior, and mechanical properties of the cryogels were determined. The results contribute to the basic understanding of the structure evolution under freezing conditions and to the knowledge of the mechanism of a cryogel formation. The smart thermoresponsive gels with a wide variety of properties were prepared, ranging from the weak ultrafast responding cryogels (deswelling in 30 s, reswelling in 8 min), prepared by the early freezing, up to the porous gel with extraordinary mechanical properties (σb = 320 kPa, εb = 900%) still displaying a relatively fast thermal volume transition. The advanced two-step freezing polymerization is shown to be a suitable general approach to controlling and tuning porosity, as well as swelling and mechanical properties of porous gels.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10404 - Polymer science

Project

<a href="/en/project/GA17-13103S" target="_blank" >GA17-13103S: Advanced smart and self-healing polymer nanocomposites</a><br>

Continuities

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

Publication year

2018

Confidentiality

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

Name of the periodical

Colloid and Polymer Science

ISSN

0303-402X

e-ISSN

—

Volume of the periodical

296

Issue of the periodical within the volume

4

Country of publishing house

DE - GERMANY

Number of pages

17

Pages from-to

753-769

UT code for WoS article

000427698500013

EID of the result in the Scopus database

2-s2.0-85044113645