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Polymers 2018, 10(11), 1212;

Creation of Superhydrophobic Poly(L-phenylalanine) Nonwovens by Electrospinning

Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
Author to whom correspondence should be addressed.
Received: 25 September 2018 / Revised: 29 October 2018 / Accepted: 30 October 2018 / Published: 31 October 2018
(This article belongs to the Special Issue Aromatic Polymers)
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From the viewpoint of green chemistry and environmental chemistry, an important challenge in the field of superhydrophobic materials is to create them with only bio-based molecules. We developed superhydrophobic and chemically stable poly(L-phenylalanine) (PolyPhe) nonwovens by electrospinning. PolyPhe was selected because, due to its very rigid chemical structure, it is one of the toughest and most hydrophobic polymers among polymers composed only of amino acids. The water contact angle on the nonwovens is a maximum of 160°, and the droplets are stably adhered and remain still on the nonwoven surface even if it is turned over, thereby suggesting a petal-type superhydrophobicity. The nonwovens show a good chemical stability, and their weight remains unchanged after 5 days immersion in acidic (pH 2) and basic (pH 12) conditions. In addition, the superhydrophobic property is not lost even after the alkali treatment. Such tough superhydrophobic materials are intriguing for further biomedical and environmental applications. View Full-Text
Keywords: superhydrophobicity; petal effect; poly(L-phenylalanine); electrospinning superhydrophobicity; petal effect; poly(L-phenylalanine); electrospinning

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Yoshida, H.; Yanagisawa, K. Creation of Superhydrophobic Poly(L-phenylalanine) Nonwovens by Electrospinning. Polymers 2018, 10, 1212.

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