A Polyurethane Surface Modifier: Contrasting Amphiphilic and Contraphilic Surfaces Driven by Block and Random Soft Blocks Having Trifluoroethoxymethyl and PEG Side Chains

Citation

Zhang, Wei; Fujiwara, Tomoko; Taşkent, Hűmeyra; Zheng, Ying; Brunson, Kennard; Gamble, Lara; & Wynne, Kenneth J. (2012). A Polyurethane Surface Modifier: Contrasting Amphiphilic and Contraphilic Surfaces Driven by Block and Random Soft Blocks Having Trifluoroethoxymethyl and PEG Side Chains. Macromolecular Chemistry and Physics, 213(14), 1415-1434.

Abstract

A conventional MDI-BD-PTMO polyurethane is modified using 2 wt% polyurethanes (U) having copolyoxetane soft blocks with hydrophobic 3F, CF3CH2OCH2— and hydrophilic MEn, CH3O(CH2CH2O)nCH2—, n = 3, 7) side chains. In contrast to neat 3F-co-MEn-U, 2 wt% 3F-co-MEn-U compositions have physically stable morphologies and wetting behavior. Surface composition (XPS) and amphiphilic or contraphilic wetting are controlled by the 3F-co-MEn polyoxetane soft block architecture and MEn side chain length. Importantly, θrec can be tuned for 2 wt% 3F-co-MEn-U compositions independent of swelling, which is controlled by the bulk polyurethane. AFM imaging leads to a new morphological model whereby fluorous/PEG-hard block nanoaggregates combine to form near surface features culminating in micron-scale texturing.

Keyword(s)

amphiphilic wetting
contraphilic wetting
copolyoxetanes
Polyurethanes
surface modification

Reference Type

Journal Article

Secondary Title

Macromolecular Chemistry and Physics

Author(s)

Zhang, Wei
Fujiwara, Tomoko
Taşkent, Hűmeyra
Zheng, Ying
Brunson, Kennard
Gamble, Lara
Wynne, Kenneth J.

Year Published

2012

Date Published

1325376000

Volume Number

213

Issue Number

14

Pages

1415-1434

ISSN/ISBN

1521-3935

DOI

A Polyurethane Surface Modifier10.1002/macp.201200075