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Rheological and Mechanical Behavior of Silk Fibroin Reinforced Waterborne Polyurethane

Waterborne polyurethane (WPU) is a versatile and environment-friendly material with growing applications in both industry and academia. Silk fibroin (SF) is an attractive material known for its structural, biological and hemocompatible properties. The SF reinforced waterborne polyurethane (WPU) is a...

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Autores principales: Tao, Yongzhen, Hasan, Anwarul, Deeb, George, Hu, Changkai, Han, Huipeng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6432601/
https://www.ncbi.nlm.nih.gov/pubmed/30979186
http://dx.doi.org/10.3390/polym8030094
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author Tao, Yongzhen
Hasan, Anwarul
Deeb, George
Hu, Changkai
Han, Huipeng
author_facet Tao, Yongzhen
Hasan, Anwarul
Deeb, George
Hu, Changkai
Han, Huipeng
author_sort Tao, Yongzhen
collection PubMed
description Waterborne polyurethane (WPU) is a versatile and environment-friendly material with growing applications in both industry and academia. Silk fibroin (SF) is an attractive material known for its structural, biological and hemocompatible properties. The SF reinforced waterborne polyurethane (WPU) is a promising scaffold material for tissue engineering applications. In this work, we report synthesis and characterization of a novel nanocomposite using SF reinforced WPU. The rheological behaviors of WPU and WPU-SF dispersions with different solid contents were investigated with steady shear and dynamic oscillatory tests to evaluate the formation of the cross-linked gel structure. The average particle size and the zeta potential of WPU-SF dispersions with different SF content were examined at 25 °C to investigate the interaction between SF and WPU. FTIR, SEM, TEM and tensile testing were performed to study the effects of SF content on the structural morphology and mechanical properties of the resultant composite films. Experimental results revealed formation of gel network in the WPU dispersions at solid contents more than 17 wt %. The conjugate reaction between the WPU and SF as well as the hydrogen bond between them helped in dispersing the SF powder into the WPU matrix as small aggregates. Addition of SF to the WPU also improved the Young’s modulus from 0.30 to 3.91 MPa, tensile strength from 0.56 to 8.94 MPa, and elongation at break from 1067% to 2480%, as SF was increased up to 5 wt %. Thus, significant strengthening and toughening can be achieved by introducing SF powder into the WPU formulations.
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spelling pubmed-64326012019-04-02 Rheological and Mechanical Behavior of Silk Fibroin Reinforced Waterborne Polyurethane Tao, Yongzhen Hasan, Anwarul Deeb, George Hu, Changkai Han, Huipeng Polymers (Basel) Article Waterborne polyurethane (WPU) is a versatile and environment-friendly material with growing applications in both industry and academia. Silk fibroin (SF) is an attractive material known for its structural, biological and hemocompatible properties. The SF reinforced waterborne polyurethane (WPU) is a promising scaffold material for tissue engineering applications. In this work, we report synthesis and characterization of a novel nanocomposite using SF reinforced WPU. The rheological behaviors of WPU and WPU-SF dispersions with different solid contents were investigated with steady shear and dynamic oscillatory tests to evaluate the formation of the cross-linked gel structure. The average particle size and the zeta potential of WPU-SF dispersions with different SF content were examined at 25 °C to investigate the interaction between SF and WPU. FTIR, SEM, TEM and tensile testing were performed to study the effects of SF content on the structural morphology and mechanical properties of the resultant composite films. Experimental results revealed formation of gel network in the WPU dispersions at solid contents more than 17 wt %. The conjugate reaction between the WPU and SF as well as the hydrogen bond between them helped in dispersing the SF powder into the WPU matrix as small aggregates. Addition of SF to the WPU also improved the Young’s modulus from 0.30 to 3.91 MPa, tensile strength from 0.56 to 8.94 MPa, and elongation at break from 1067% to 2480%, as SF was increased up to 5 wt %. Thus, significant strengthening and toughening can be achieved by introducing SF powder into the WPU formulations. MDPI 2016-03-21 /pmc/articles/PMC6432601/ /pubmed/30979186 http://dx.doi.org/10.3390/polym8030094 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 by Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Tao, Yongzhen
Hasan, Anwarul
Deeb, George
Hu, Changkai
Han, Huipeng
Rheological and Mechanical Behavior of Silk Fibroin Reinforced Waterborne Polyurethane
title Rheological and Mechanical Behavior of Silk Fibroin Reinforced Waterborne Polyurethane
title_full Rheological and Mechanical Behavior of Silk Fibroin Reinforced Waterborne Polyurethane
title_fullStr Rheological and Mechanical Behavior of Silk Fibroin Reinforced Waterborne Polyurethane
title_full_unstemmed Rheological and Mechanical Behavior of Silk Fibroin Reinforced Waterborne Polyurethane
title_short Rheological and Mechanical Behavior of Silk Fibroin Reinforced Waterborne Polyurethane
title_sort rheological and mechanical behavior of silk fibroin reinforced waterborne polyurethane
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6432601/
https://www.ncbi.nlm.nih.gov/pubmed/30979186
http://dx.doi.org/10.3390/polym8030094
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