Exceptionally fast temperature-responsive, mechanically strong and extensible monolithic non-porous hydrogels: poly(N-isopropylacrylamide) intercalated with hydroxypropyl methylcellulose

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F23%3A00580772" target="_blank" >RIV/61389013:_____/23:00580772 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/2310-2861/9/12/926" target="_blank" >https://www.mdpi.com/2310-2861/9/12/926</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/gels9120926" target="_blank" >10.3390/gels9120926</a>

Result language

angličtina

Original language name

Exceptionally fast temperature-responsive, mechanically strong and extensible monolithic non-porous hydrogels: poly(N-isopropylacrylamide) intercalated with hydroxypropyl methylcellulose

Original language description

Exceptionally fast temperature-responsive, mechanically strong, tough and extensible monolithic non-porous hydrogels were synthesized. They are based on divinyl-crosslinked poly(N-isopropyl-acrylamide) (PNIPAm) intercalated by hydroxypropyl methylcellulose (HPMC). HPMC was largely extracted after polymerization, thus yielding a ‘template-modified’ PNIPAm network intercalated with a modest residue of HPMC. High contents of divinyl crosslinker and of HPMC caused a varying degree of micro-phase-separation in some products, but without detriment to mechanical or tensile properties. After extraction of non-fixed HPMC, the micro-phase-separated products combine superior mechanical properties with ultra-fast T-response (in 30 s). Their PNIPAm network was highly regular and extensible (intercalation effect), toughened by hydrogen bonds to HPMC, and interpenetrated by a network of nano-channels (left behind by extracted HPMC), which ensured the water transport rates needed for ultra-fast deswelling. Moreover, the T-response rate could be widely tuned by the degree of heterogeneity during synthesis. The fastest-responsive among our hydrogels could be of practical interest as soft actuators with very good mechanical properties (soft robotics), while the slower ones offer applications in drug delivery systems (as tested on the example of Theophylline), or in related biomedical engineering applications.

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

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

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

Name of the periodical

Gels

ISSN

2310-2861

e-ISSN

2310-2861

Volume of the periodical

9

Issue of the periodical within the volume

12

Country of publishing house

CH - SWITZERLAND

Number of pages

25

Pages from-to

926

UT code for WoS article

001131988500001

EID of the result in the Scopus database

2-s2.0-85180715788