Journal article
Low friction thermoplastic polyurethane coatings imparted by surface segregation of amphiphilic block copolymers
Materials and Surface Engineering, Department of Mechanical Engineering, Technical University of Denmark1
Department of Mechanical Engineering, Technical University of Denmark2
The Danish Polymer Centre, Department of Chemical and Biochemical Engineering, Technical University of Denmark3
Department of Chemical and Biochemical Engineering, Technical University of Denmark4
Electrochemistry, Department of Energy Conversion and Storage, Technical University of Denmark5
Department of Energy Conversion and Storage, Technical University of Denmark6
This study aims to hydrophilize thermoplastic polyurethane (TPU) surface via selective segregation of amphiphilic block copolymers from bulk TPU matrix, namely “inverted grafting-to” approach. To this end, hydrophilic poly(ethylene glycol) (PEG) polymer chain was employed in either diblock (polycaprolactone-b-poly(ethylene glycol) (PCL-b-PEG)) or triblock (poly(ethylene glycol)-b-poly(propylene glycol)-b-poly(ethylene glycol) (PEG-b-PPO-b-PEG)) amphiphilic copolymer additives in polymer matrix.
Greatly reduced water contact angles, as low as ca. 13°, from ≥90° for bare substrate proved the successful hydrophilization of TPU surface by this approach, although the degree of hydrophilization was significantly affected by the structure and concentration of embedded amphiphilic copolymers. Moreover, PEG-functionalized TPU surfaces in this approach displayed a reduction of coefficient of friction (COF) by two orders of magnitude.
Given that TPU is a widely used material for urinary catheter or other medical devices, we demonstrated a first promising application as lubricious coating to TPU-based urinary catheter tubes.
| Language: | English |
|---|---|
| Year: | 2021 |
| Pages: | 100477 |
| ISSN: | 22150382 |
| Types: | Journal article |
| DOI: | 10.1016/j.colcom.2021.100477 |
| ORCIDs: | Røn, Troels , Jeong, Seonghyeon , Jankova, Katja and Lee, Seunghwan |
