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Robust Polymer Nanofilms with Bioengineering and Environmental Applications via Facile and Highly Efficient Covalently Layer-by-Layer Assembling

Abstract

This work reports a kind of novel, robust, multifunctional covalent-bonded polymer nanofilms based on highly efficient spin-assisted layer-by-layer (LbL) assembling, with a wide range of engineering and bioengineering applications. An active-ester block copolymer, polypentafluorophenylacrylate-block-polystyrene (PPFPA-b-PS) and an amine-rich polymer, branched polyethyleneimine (PEI) have been chosen as model polymers. The as-prepared nanofilms show switchable hydrophobicity with controllable thickness. Nanomechanical tests demonstrate that the surface adhesion between PPFPA-b-PS and PEI layers facilitates the excellent film stability under different solvent conditions. Robust and centimeter-scale freestanding nanofilms with good transparency and excellent flexibility could be readily obtained by peeling off the films from silicon substrates without using any sacrifice layer. More importantly, the multi-layer nanofilms containing free pentafluorophenol groups or amine groups can be further readily functionalized for tailoring the film properties for various applications. As a proof of concept, the multi-layer nanofilms with free ester groups were modified with Rhodamine-6G hydrazone and tested as a H+ sensor. The free amine groups in the polymer nanofilms show strong interaction with perfluorooctanoic acid for achieving high surface hydrophobicity. The polymer nanofilms also show exceptional tunable cell-attachment behavior with switching the outmost layer between PPFPA-b-PS and PEI, demonstrating great potential for biomedical applications.

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Publication details

The article was received on 05 Mar 2018, accepted on 10 May 2018 and first published on 11 May 2018


Article type: Paper
DOI: 10.1039/C8TB00603B
Citation: J. Mater. Chem. B, 2018, Accepted Manuscript
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    Robust Polymer Nanofilms with Bioengineering and Environmental Applications via Facile and Highly Efficient Covalently Layer-by-Layer Assembling

    J. Huang, X. Qiu, B. Yan, L. xie, J. Yang, H. Xu, Y. Deng, L. Chen, X. Wang and H. Zeng, J. Mater. Chem. B, 2018, Accepted Manuscript , DOI: 10.1039/C8TB00603B

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