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pH Effect on the Structure, Rheology, and Electrospinning of Maize Zein
As a simple and convenient technology to fabricate micron-to-nanoscale fibers with controllable structure, electrostatic spinning has produced fiber films with many natural advantages, including a large specific surface area and high porosity. Maize zein, as a major storage protein in corn, showed h...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10093575/ https://www.ncbi.nlm.nih.gov/pubmed/37048217 http://dx.doi.org/10.3390/foods12071395 |
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author | Wu, Yuehan Du, Jinhui Zhang, Jiahan Li, Yanlei Gao, Zhiming |
author_facet | Wu, Yuehan Du, Jinhui Zhang, Jiahan Li, Yanlei Gao, Zhiming |
author_sort | Wu, Yuehan |
collection | PubMed |
description | As a simple and convenient technology to fabricate micron-to-nanoscale fibers with controllable structure, electrostatic spinning has produced fiber films with many natural advantages, including a large specific surface area and high porosity. Maize zein, as a major storage protein in corn, showed high hydrophobicity and has been successfully applied as a promising carrier for encapsulation and controlled release in the pharmaceutical and food areas. Proteins exhibit different physical and chemical properties at different pH values, and it is worth investigating whether this change in physical and chemical properties affects the properties of electrospun fiber films. We studied the pH effects on zein solution rheology, fiber morphology, and film properties. Rotational rheometers were used to test the rheology of the solutions and establish a correlation between solution concentration and fiber morphology. The critical concentrations calculated by the cross-equation fitting model were 17.6%, 20.1%, 20.1%, 17.1%, and 19.5% (w/v) for pH 4, 5, 6, 7, and 8, respectively. The secondary structure of zein changed with the variation in solution pH. Furthermore, we analyzed the physical properties of the zein films. The contact angles of the fiber membranes prepared with different pH spinning solutions were all above 100, while zein films formed by solvent evaporation showed hydrophilic properties. The results indicated that the rheological properties of zein solutions and the surface properties of the film were affected by the pH value. This study showed that zein solutions can be stabilized to form electrospun fibers at a variety of pH levels and offered new opportunities to further enhance the encapsulation activity of zein films for bioactive materials. |
format | Online Article Text |
id | pubmed-10093575 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-100935752023-04-13 pH Effect on the Structure, Rheology, and Electrospinning of Maize Zein Wu, Yuehan Du, Jinhui Zhang, Jiahan Li, Yanlei Gao, Zhiming Foods Article As a simple and convenient technology to fabricate micron-to-nanoscale fibers with controllable structure, electrostatic spinning has produced fiber films with many natural advantages, including a large specific surface area and high porosity. Maize zein, as a major storage protein in corn, showed high hydrophobicity and has been successfully applied as a promising carrier for encapsulation and controlled release in the pharmaceutical and food areas. Proteins exhibit different physical and chemical properties at different pH values, and it is worth investigating whether this change in physical and chemical properties affects the properties of electrospun fiber films. We studied the pH effects on zein solution rheology, fiber morphology, and film properties. Rotational rheometers were used to test the rheology of the solutions and establish a correlation between solution concentration and fiber morphology. The critical concentrations calculated by the cross-equation fitting model were 17.6%, 20.1%, 20.1%, 17.1%, and 19.5% (w/v) for pH 4, 5, 6, 7, and 8, respectively. The secondary structure of zein changed with the variation in solution pH. Furthermore, we analyzed the physical properties of the zein films. The contact angles of the fiber membranes prepared with different pH spinning solutions were all above 100, while zein films formed by solvent evaporation showed hydrophilic properties. The results indicated that the rheological properties of zein solutions and the surface properties of the film were affected by the pH value. This study showed that zein solutions can be stabilized to form electrospun fibers at a variety of pH levels and offered new opportunities to further enhance the encapsulation activity of zein films for bioactive materials. MDPI 2023-03-25 /pmc/articles/PMC10093575/ /pubmed/37048217 http://dx.doi.org/10.3390/foods12071395 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Wu, Yuehan Du, Jinhui Zhang, Jiahan Li, Yanlei Gao, Zhiming pH Effect on the Structure, Rheology, and Electrospinning of Maize Zein |
title | pH Effect on the Structure, Rheology, and Electrospinning of Maize Zein |
title_full | pH Effect on the Structure, Rheology, and Electrospinning of Maize Zein |
title_fullStr | pH Effect on the Structure, Rheology, and Electrospinning of Maize Zein |
title_full_unstemmed | pH Effect on the Structure, Rheology, and Electrospinning of Maize Zein |
title_short | pH Effect on the Structure, Rheology, and Electrospinning of Maize Zein |
title_sort | ph effect on the structure, rheology, and electrospinning of maize zein |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10093575/ https://www.ncbi.nlm.nih.gov/pubmed/37048217 http://dx.doi.org/10.3390/foods12071395 |
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