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Original Research ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Bioeng. Biotechnol. | doi: 10.3389/fbioe.2019.00332

Functionalization of bacterial cellulose nonwoven by poly(fluorophenol) to improve its hydrophobicity and durability

  • 1Sookmyung Women's University, South Korea
  • 2University of Minho, Portugal

The present study aims to improve the hydrophobicity and durability of bacterial cellulose (BC) nonwoven by functionalization with poly(fluorophenol). To this end, laccase was first entrapped onto BC and then used to polymerize the fluorophenol {4-[4-(trifluoromethyl) phenoxy] phenol} in situ. The polymerization of fluorophenol by laccase was confirmed through 1H NMR and MALDI-TOF analyses. The amount of poly(fluorophenol) on BC nonwoven was determined by evaluation of the surface hydrophobicity properties such as water contact angle (WCA), surface energy and water absorption time. After BC functionalization with poly(fluorophenol) (20mM), the WCA increased from 54.5±1.2° to 120±1.5° while the surface energy decreased (11.58±1.4mN/m). X-ray photoelectron spectroscopy (XPS) analysis confirmed an increase in the fluorine content in BC from 5.27 to 17.57%. The findings confirmed the polymerization of fluorophenol by laccase and its entrapment onto a BC nanofiber structure. The durability of the functionalization with poly(fluorophenol) was confirmed by evaluating the washing fastness, tensile strength after washing and dimensional stability. The results indicate that the functionalized BC nonwoven had higher tensile strength (x10 times) and better dimensional stability (30 %) than the non-functionalized material.

Keywords: Bacterial cellulose (BC), Fluorophenol, Polymerization, Hydrophobization, Functionalization

Received: 01 Aug 2019; Accepted: 29 Oct 2019.

Copyright: © 2019 Song, Silva, Cavaco-Paulo and Kim. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Prof. Hye Rim Kim, Sookmyung Women's University, Seoul, 140-742, South Korea, khyerim@sookmyung.ac.kr