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Electrospun Polymer Nanofibers Reinforced by Tannic Acid/Fe(+++) Complexes †

We report the successful preparation of reinforced electrospun nanofibers and fibrous mats of polyvinyl alcohol (PVA) via a simple and inexpensive method using stable tannic acid (TA) and ferric ion (Fe(+++)) assemblies formed by solution mixing and pH adjustment. Changes in solution pH change the n...

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Autores principales: Yang, Weiqiao, Sousa, Ana M. M., Thomas-Gahring, Audrey, Fan, Xuetong, Jin, Tony, Li, Xihong, Tomasula, Peggy M., Liu, LinShu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5457119/
https://www.ncbi.nlm.nih.gov/pubmed/28773876
http://dx.doi.org/10.3390/ma9090757
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author Yang, Weiqiao
Sousa, Ana M. M.
Thomas-Gahring, Audrey
Fan, Xuetong
Jin, Tony
Li, Xihong
Tomasula, Peggy M.
Liu, LinShu
author_facet Yang, Weiqiao
Sousa, Ana M. M.
Thomas-Gahring, Audrey
Fan, Xuetong
Jin, Tony
Li, Xihong
Tomasula, Peggy M.
Liu, LinShu
author_sort Yang, Weiqiao
collection PubMed
description We report the successful preparation of reinforced electrospun nanofibers and fibrous mats of polyvinyl alcohol (PVA) via a simple and inexpensive method using stable tannic acid (TA) and ferric ion (Fe(+++)) assemblies formed by solution mixing and pH adjustment. Changes in solution pH change the number of TA galloyl groups attached to the Fe(+++) from one (pH < 2) to two (3 < pH < 6) to three (pH < 7.4) and affect the interactions between PVA and TA. At pH ~ 5.5, the morphology and fiber diameter size (FDS) examined by SEM are determinant for the mechanical properties of the fibrous mats and depend on the PVA content. At an optimal 8 wt % concentration, PVA becomes fully entangled and forms uniform nanofibers with smaller FDS (p < 0.05) and improved mechanical properties when compared to mats of PVA alone and of PVA with TA (p < 0.05). Changes in solution pH lead to beads formation, more irregular FDS and poorer mechanical properties (p < 0.05). The Fe(+++) inclusion does not alter the oxidation activity of TA (p > 0.05) suggesting the potential of TA-Fe(+++) assemblies to reinforce polymer nanofibers with high functionality for use in diverse applications including food, biomedical and pharmaceutical.
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spelling pubmed-54571192017-07-28 Electrospun Polymer Nanofibers Reinforced by Tannic Acid/Fe(+++) Complexes † Yang, Weiqiao Sousa, Ana M. M. Thomas-Gahring, Audrey Fan, Xuetong Jin, Tony Li, Xihong Tomasula, Peggy M. Liu, LinShu Materials (Basel) Article We report the successful preparation of reinforced electrospun nanofibers and fibrous mats of polyvinyl alcohol (PVA) via a simple and inexpensive method using stable tannic acid (TA) and ferric ion (Fe(+++)) assemblies formed by solution mixing and pH adjustment. Changes in solution pH change the number of TA galloyl groups attached to the Fe(+++) from one (pH < 2) to two (3 < pH < 6) to three (pH < 7.4) and affect the interactions between PVA and TA. At pH ~ 5.5, the morphology and fiber diameter size (FDS) examined by SEM are determinant for the mechanical properties of the fibrous mats and depend on the PVA content. At an optimal 8 wt % concentration, PVA becomes fully entangled and forms uniform nanofibers with smaller FDS (p < 0.05) and improved mechanical properties when compared to mats of PVA alone and of PVA with TA (p < 0.05). Changes in solution pH lead to beads formation, more irregular FDS and poorer mechanical properties (p < 0.05). The Fe(+++) inclusion does not alter the oxidation activity of TA (p > 0.05) suggesting the potential of TA-Fe(+++) assemblies to reinforce polymer nanofibers with high functionality for use in diverse applications including food, biomedical and pharmaceutical. MDPI 2016-09-06 /pmc/articles/PMC5457119/ /pubmed/28773876 http://dx.doi.org/10.3390/ma9090757 Text en © 2016 by the authors; Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Yang, Weiqiao
Sousa, Ana M. M.
Thomas-Gahring, Audrey
Fan, Xuetong
Jin, Tony
Li, Xihong
Tomasula, Peggy M.
Liu, LinShu
Electrospun Polymer Nanofibers Reinforced by Tannic Acid/Fe(+++) Complexes †
title Electrospun Polymer Nanofibers Reinforced by Tannic Acid/Fe(+++) Complexes †
title_full Electrospun Polymer Nanofibers Reinforced by Tannic Acid/Fe(+++) Complexes †
title_fullStr Electrospun Polymer Nanofibers Reinforced by Tannic Acid/Fe(+++) Complexes †
title_full_unstemmed Electrospun Polymer Nanofibers Reinforced by Tannic Acid/Fe(+++) Complexes †
title_short Electrospun Polymer Nanofibers Reinforced by Tannic Acid/Fe(+++) Complexes †
title_sort electrospun polymer nanofibers reinforced by tannic acid/fe(+++) complexes †
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5457119/
https://www.ncbi.nlm.nih.gov/pubmed/28773876
http://dx.doi.org/10.3390/ma9090757
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