Wetting of surface grafted hydrophilic-b-hydrophobic block copolymer brushes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F25%3A00637127" target="_blank" >RIV/61389013:_____/25:00637127 - isvavai.cz</a>

Výsledek na webu

<a href="https://advanced.onlinelibrary.wiley.com/doi/10.1002/adfm.202419443" target="_blank" >https://advanced.onlinelibrary.wiley.com/doi/10.1002/adfm.202419443</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/adfm.202419443" target="_blank" >10.1002/adfm.202419443</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Wetting of surface grafted hydrophilic-b-hydrophobic block copolymer brushes

Popis výsledku v původním jazyce

The wetting of diblock copolymer brushes by water is studied. Th goal of this work is to understand how the thickness of the bottom and top copolymer block affect the wetting behavior, respectively. For the synthesis of diblock copolymer brushes the bottom block, a hydrophilic poly(2-hydroxyethyl methacrylate) (PHEMA) brush is grafted from a undecyl-trichloro-self- assembled monolayer on silicon wafer. Then the top block, a hydrophobic polystyrene (PS) or poly(2-ethylhexyl methacrylate) (PEtHexMA) is grafted from the PHEMA block. Hereby, a hydrophilic-b-hydrophobic diblock copolymer is obtained. The top copolymer block determines the advancing contact angle of the copolymer brushes in their pristine state. The receding contact angle depends on the thickness of the top and bottom copolymer block. For a top copolymer thickness <30 nm the receding contact angle decreased. An increase in the thickness of the bottom block to 35 nm decreases the receding contact angle as well. By exposing the diblock copolymer brush with a thickness of the top block >30 nm to warm water the wetting properties switch from a hydrophobic to a hydrophilic. The surface switches back to the hydrophobic state by exposing it to toluene and subsequent temperature annealing.

Název v anglickém jazyce

Wetting of surface grafted hydrophilic-b-hydrophobic block copolymer brushes

Popis výsledku anglicky

The wetting of diblock copolymer brushes by water is studied. Th goal of this work is to understand how the thickness of the bottom and top copolymer block affect the wetting behavior, respectively. For the synthesis of diblock copolymer brushes the bottom block, a hydrophilic poly(2-hydroxyethyl methacrylate) (PHEMA) brush is grafted from a undecyl-trichloro-self- assembled monolayer on silicon wafer. Then the top block, a hydrophobic polystyrene (PS) or poly(2-ethylhexyl methacrylate) (PEtHexMA) is grafted from the PHEMA block. Hereby, a hydrophilic-b-hydrophobic diblock copolymer is obtained. The top copolymer block determines the advancing contact angle of the copolymer brushes in their pristine state. The receding contact angle depends on the thickness of the top and bottom copolymer block. For a top copolymer thickness <30 nm the receding contact angle decreased. An increase in the thickness of the bottom block to 35 nm decreases the receding contact angle as well. By exposing the diblock copolymer brush with a thickness of the top block >30 nm to warm water the wetting properties switch from a hydrophobic to a hydrophilic. The surface switches back to the hydrophobic state by exposing it to toluene and subsequent temperature annealing.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/GA22-27329S" target="_blank" >GA22-27329S: Multifunkční nanostruktury pro biosenzorickou detekci biomolekul se vztahem k onkohematologickým onemocněním</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Advanced Functional Materials

ISSN

1616-301X

e-ISSN

1616-3028

Svazek periodika

35

Číslo periodika v rámci svazku

24

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

11

Strana od-do

2419443

Kód UT WoS článku

001440341700001

EID výsledku v databázi Scopus

2-s2.0-105000101372