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Biomimetic hierarchical structure with hydrophilic surface and hydrophobic subsurface constructed from waterborne polyurethanes containing self-assembling peptide extender

Abstract

Constructing a biomimetic hierarchical structure is of great benefit to achieve materials with expected high performance. In this work, a new Fmoc-diphenylalanine (Fmoc-FF) based peptide extender (PPE) is synthesized for preparing a series of waterborne polyurethanes (WPU) to construct hydrophilic surface and hydrophobic subsurface. A pre-assembly structure of the WPU emulsion particle is achieved by the introduction of PPE. It possesses a compact core consisting of hydrophobic segments with Fmoc-FF by π-π stacking and a loose shell consisting of hydrophilic polyethylene glycol (PEG) segments. The self-assembly Fmoc-FF could also enhance the phase separation between soft segments and hard segments. During the film formation by demulsification, the outer PEG segments are easy to migrate onto the surface and the hydrophobic compact cores aggregate into subsurface. Such architecture endows WPU films simultaneous biocompatibility, antifouling, and water resistance in wet condition. This work provides a new insight into design polymer emulsion with pre-assembled phase to construct the expected hierarchical structure of films or coatings for biomaterials and antifouling materials.

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Publication details

The article was accepted on 01 Jun 2018 and first published on 04 Jun 2018


Article type: Paper
DOI: 10.1039/C8TB01279B
Citation: J. Mater. Chem. B, 2018, Accepted Manuscript
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    Biomimetic hierarchical structure with hydrophilic surface and hydrophobic subsurface constructed from waterborne polyurethanes containing self-assembling peptide extender

    F. Zhang, R. Wang, Y. He, W. Lin, Y. Li, Y. Shao, J. Li, M. Ding, F. Luo, H. Tan and Q. Fu, J. Mater. Chem. B, 2018, Accepted Manuscript , DOI: 10.1039/C8TB01279B

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