pH-triggered reversible sol?gel transition in aqueous solutions of amphiphilic gradient copolymers
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F11%3A00366060" target="_blank" >RIV/61389013:_____/11:00366060 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1039/c1sm06600e" target="_blank" >http://dx.doi.org/10.1039/c1sm06600e</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/c1sm06600e" target="_blank" >10.1039/c1sm06600e</a>
Alternative languages
Result language
angličtina
Original language name
pH-triggered reversible sol?gel transition in aqueous solutions of amphiphilic gradient copolymers
Original language description
We demonstrate the possibility of reversible pH-controlled sol?gel transition in aqueous solution of associating amphiphilic triblock copolymer poly(styrene-grad-acrylic acid)-b-poly(acrylic acid)-b-poly(styrene-grad-acrylic acid), synthesized via nitroxide-mediated radical copolymerization. The presence of pH-sensitive co-monomer units of the acrylic acid in the terminal blocks ensures the dynamic nature of the styrene-rich hydrophobic nano-domains which are formed at low pH. At small polymer concentrations the association triggered by lowering the pH gives rise to flower-like micelles stabilized by partially ionized PAA coronae. The pH-controlled association was monitored by DLS-titration and manifested in the evolution of a correlation peak in the SANS spectra. Above the micelle overlap concentration a decrease in pH provokes macroscopic gelation where the styrene-reach domains perform as pH-controllable cross-links in the transient network.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GAP208%2F10%2F1600" target="_blank" >GAP208/10/1600: Polymeric particles and nanostructured materials stabilized by surface active molecules</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Soft Matter
ISSN
1744-683X
e-ISSN
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Volume of the periodical
7
Issue of the periodical within the volume
22
Country of publishing house
GB - UNITED KINGDOM
Number of pages
10
Pages from-to
10824-10833
UT code for WoS article
000296388300042
EID of the result in the Scopus database
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