Development of poor cell adhesive immersion precipitation membranes based on supramolecular bis-urea polymers

Ronald C. van Gaal, Johnick F. van Sprang, Zandrie Borneman, Patricia Y.W. Dankers (Corresponding author)

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Abstract

A variety of biomedical applications requires tailored membranes; fabrication through a mix-and-match approach is simple and desired. Polymers based on supramolecular bis-urea (BU) moieties are capable of modular integration through directed non-covalent stacking. Here, it is proposed that non-cell adhesive properties can be introduced in polycaprolactone-BU-based membranes by the addition of poly(ethylene glycol) (PEG)-BU during immersion precipitation membrane fabrication, while unmodified PEG is not retained in the membrane. PEG-BU addition results in denser membranes with a similar pore size compared to pristine membranes, while PEG addition induces defect formation. Infrared spectroscopy and surface hydrophobicity measurements indicate that PEG-BU is retained during membrane processing. Additionally, PEG-BU incorporation successfully leads to poor cell adhesive surfaces. No evidence is observed to indicate PEG retention. The results obtained indicate that the BU system enables intimate mixing of BU-modified polymers after processing. Collectively, the results provide the first steps toward BU-based immersion precipitated supramolecular membranes for biomedical applications.

Original languageEnglish
Article number1900277
Number of pages7
JournalMacromolecular Bioscience
Volume20
Issue number3
DOIs
Publication statusPublished - 1 Mar 2020

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Hot Topic: Membranes

Keywords

  • anti-fouling
  • biomaterial
  • bis-urea
  • membrane
  • PEG
  • supramolecular

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