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Colaruotolo LA, Singh SS, Dobson S, Lim LT, Joye IJ, Rogers MA, Corradini MG. Mapping deterioration in electrospun zein nonwoven nanostructures encapsulating corn oil. Curr Res Food Sci 2024; 9:100801. [PMID: 39050407 PMCID: PMC11267021 DOI: 10.1016/j.crfs.2024.100801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 06/14/2024] [Accepted: 06/27/2024] [Indexed: 07/27/2024] Open
Abstract
Electrospun nonwovens of biopolymers are gaining popularity in filtration, coatings, encapsulation, and packaging materials. However, their applications are hindered by limited stability, particularly when loaded with lipids. This research aimed to apply a multiscale approach to gain insights into deteriorative processes, e.g., oxidation, limiting the shelf life of these complex materials, using corn oil-loaded electrospun zein nonwovens as a model system. Oil-doped zein electrospun nonwovens were stored in the dark at 23 °C and 33% relative humidity for 28 days and tested at selected intervals to monitor their morphology and mechanical properties. Lipid oxidation was assessed using the thiobarbituric acid reactive species (TBARS) assay. The photophysical properties of intrinsic, i.e., tyrosine (Tyr), and extrinsic, i.e., boron-dipyrromethene undecanoic acid 581/591 (BODIPY C11), lumiphores were also monitored to evaluate changes in local molecular rigidity, and oxidation, respectively. The protein secondary structure was determined with Fourier transform infrared spectroscopy (FTIR). Scanning electron microscopy (SEM) analysis of the oil-loaded electrospun nonwovens revealed that the diameter of the ribbon-like fiber significantly decreased during storage from 701 ± 23 nm to 620 ± 44 nm. Breakage of the electrospun fibers was observed and correlated with increased brittleness and molecular rigidity of the nonwoven material, reflected by an increase in Tyr emission intensity and phosphorescence lifetime. Changes in tensile strength, brittleness and matrix rigidity also correlated with a zein secondary structure transition from unordered to ordered β-sheets. Raman and luminescence micrographs showed oil migration during storage, thereby increasing lipid oxidation. The correlation between local rigidity and lipid distribution/oxidation suggests that reorganizing protein structures increased material brittleness and displaced encapsulated oils within the electrospun fiber. Understanding deteriorative mechanisms aids in developing innovative strategies to improve the stability of these novel food-grade materials.
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Affiliation(s)
| | | | - Stacie Dobson
- Department of Food Science, University of Guelph, Guelph, ON, Canada
| | - Loong-Tak Lim
- Department of Food Science, University of Guelph, Guelph, ON, Canada
| | - Iris J. Joye
- Department of Food Science, University of Guelph, Guelph, ON, Canada
| | - Michael A. Rogers
- Department of Food Science, University of Guelph, Guelph, ON, Canada
| | - Maria G. Corradini
- Department of Food Science, University of Guelph, Guelph, ON, Canada
- Arrell Food Institute, University of Guelph, Guelph, ON, Canada
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Xu L, Xu X, Xu Y, Huang M, Li Y. Release mechanism of UV responded chitosan-decorated TiO 2 microcapsules: Regulation of humidity. Food Chem 2024; 433:137170. [PMID: 37666123 DOI: 10.1016/j.foodchem.2023.137170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 08/05/2023] [Accepted: 08/13/2023] [Indexed: 09/06/2023]
Abstract
In this research, the synergistic influences of UV light and relative humidity on the structure and immediate triggered release abilities of microcapsules loaded with oregano essential oil (OEO) were investigated. The microcapsules sufficiently were encouraged to release OEO by UV irradiation and regulated by ambient humidity. Relatively low humidity from 23 to 58% had no impact on the encapsulation efficiency and release processes of microcapsules in food simulations and air significantly. Analysis of microstructure showed that UV irradiation and higher relative humidity were conducive to fracturing glycosidic bonds of microcapsule shell through hydroxyl radicals generated by TiO2 and vapour. Finally, microcapsules were applied to the preservation of chicken breasts for 6 d and the results showed that chicken breasts with microcapsules that had been irradiated by UV light at 76 %RH would have better quality and the shelf life was extended, which evidenced its excellent foreground in meat preservation.
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Affiliation(s)
- Lina Xu
- State Key Laboratory of Meat Quality Control and Cultured Meat Development, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Xinglian Xu
- State Key Laboratory of Meat Quality Control and Cultured Meat Development, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China.
| | - Yujuan Xu
- State Key Laboratory of Meat Quality Control and Cultured Meat Development, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Mingyuan Huang
- State Key Laboratory of Meat Quality Control and Cultured Meat Development, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Yali Li
- State Key Laboratory of Meat Quality Control and Cultured Meat Development, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
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3
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Cordoba A, Guernelli M, Montalti M, Saldías C, Focarete ML, Leiva A. Nanofibers of chitosan-polycaprolactone blends as active support for photocatalytic nanoparticles: Outstanding role of chitosan in the degradation of an organic dye in water. Int J Biol Macromol 2023; 253:127111. [PMID: 37774821 DOI: 10.1016/j.ijbiomac.2023.127111] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/15/2023] [Accepted: 09/26/2023] [Indexed: 10/01/2023]
Abstract
Hybrid nanofibers of a chitosan-polycaprolactone blend containing titanium dioxide nanoparticles TiO2NPs, were prepared through electrospinning to study their adsorption and photocatalytic degradation capabilities of the model organic water pollutants, rhodamine B, RhB. To obtain uniform and bead-free nanofibers, an optimization of the electrospinning parameters was performed. The optimization was carried out by systematically adjusting the solution conditions (solvent, concentration, and polymer ratio) and instrumental parameters (voltage, needle tip-collector distance, and flow). The obtained materials were characterized by FT-IR, TGA, DSC, SEM, TEM, mechanical tensile test, and water contact angle. The photoactivity was investigated using a batch-type system by following UV-Vis absorbance and fluorescence of RhB. TiO2NPs were incorporated ex-situ into the polymer matrix, contributing to good mechanical properties and higher hydrophilicity of the material. The results showed that the presence of chitosan in the nanofibers significantly increased the adsorption of RhB and its photocatalytic degradation by TiO2NPs (5, 55 and 80 % of RhB degradation with NFs of PCL, TiO2/PCL and TiO2/CS-PCL, after 30 h of light irradiation, respectively), evidencing a synergistic effect between them. The results are attributed to an attraction of RhB by chitosan to the vicinity of TiO2NPs, favouring initial adsorption and degradation, phenomenon known as "bait-and-hook-and-destruct" effect.
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Affiliation(s)
- Alexander Cordoba
- Department of Physical Chemistry, Faculty of Chemistry and Pharmacy, Pontificia Universidad Católica de Chile, Santiago, Chile; Department of Chemistry "Giacomo Ciamician" and National Consortium of Materials Science and Technology (INSTM, Bologna RU), Alma Mater Studiorum - Università di Bologna, Bologna, Italy
| | - Moreno Guernelli
- Department of Chemistry "Giacomo Ciamician" and National Consortium of Materials Science and Technology (INSTM, Bologna RU), Alma Mater Studiorum - Università di Bologna, Bologna, Italy
| | - Marco Montalti
- Department of Chemistry "Giacomo Ciamician" and National Consortium of Materials Science and Technology (INSTM, Bologna RU), Alma Mater Studiorum - Università di Bologna, Bologna, Italy
| | - Cesar Saldías
- Department of Physical Chemistry, Faculty of Chemistry and Pharmacy, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Maria Letizia Focarete
- Department of Chemistry "Giacomo Ciamician" and National Consortium of Materials Science and Technology (INSTM, Bologna RU), Alma Mater Studiorum - Università di Bologna, Bologna, Italy; Health Sciences and Technologies-Interdepartmental Center for Industrial Research, Alma Mater Studiorum - Università di Bologna, Bologna, Italy
| | - Angel Leiva
- Department of Physical Chemistry, Faculty of Chemistry and Pharmacy, Pontificia Universidad Católica de Chile, Santiago, Chile.
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Fabrication and immediate release characterization of UV responded oregano essential oil loaded microcapsules by chitosan-decorated titanium dioxide. Food Chem 2023; 400:133965. [DOI: 10.1016/j.foodchem.2022.133965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 07/29/2022] [Accepted: 08/14/2022] [Indexed: 11/21/2022]
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Vukoje M, Kulčar R, Itrić Ivanda K, Bota J, Cigula T. Improvement in Thermochromic Offset Print UV Stability by Applying PCL Nanocomposite Coatings. Polymers (Basel) 2022; 14:polym14071484. [PMID: 35406357 PMCID: PMC9002658 DOI: 10.3390/polym14071484] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/01/2022] [Accepted: 04/03/2022] [Indexed: 02/04/2023] Open
Abstract
Thermochromic (TC) printing inks change their colouration as a response to a change in temperature. This ability renders them attractive for various applications such as smart packaging, security printing, and marketing, but their application is limited due to their low UV stability, i.e., loss of their thermochromic effect when exposed to UV radiation. In order to improve the UV stability of TC prints, one offset TC printing ink was printed and coated with nanomodified polycaprolactone (PCL) coating. The coating was prepared with the incorporation of 1%, 2%, and 3% mass ratios of ZnO and TiO2 nanoparticles in the PCL matrix. The prepared nanocomposite coatings were applied onto the TC print and exposed to UV radiation; afterwards, they were characterized by the colour properties of prints, SEM microscopy, FTIR, and fluorescence spectroscopy. SEM microscopy, FTIR, and fluorescence spectroscopy showed higher rates of polymer degradation, and the results of colour stability indicated that 3% TiO2 in PCL matrix gave the best UV stability and protection of TC prints.
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Fabrication and characterization of core–shell TiO2-containing nanofibers of PCL-zein by coaxial electrospinning method as an erythromycin drug carrier. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-021-03591-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Jinga SI, Zamfirescu AI, Voicu G, Enculescu M, Evanghelidis A, Busuioc C. PCL-ZnO/TiO 2/HAp Electrospun Composite Fibers with Applications in Tissue Engineering. Polymers (Basel) 2019; 11:polym11111793. [PMID: 31683940 PMCID: PMC6918332 DOI: 10.3390/polym11111793] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 10/15/2019] [Accepted: 10/29/2019] [Indexed: 01/25/2023] Open
Abstract
The main objective of the tissue engineering field is to regenerate the damaged parts of the body by developing biological substitutes that maintain, restore, or improve original tissue function. In this context, by using the electrospinning technique, composite scaffolds based on polycaprolactone (PCL) and inorganic powders were successfully obtained, namely: zinc oxide (ZnO), titanium dioxide (TiO2) and hydroxyapatite (HAp). The novelty of this approach consists in the production of fibrous membranes based on a biodegradable polymer and loaded with different types of mineral powders, each of them having a particular function in the resulting composite. Subsequently, the precursor powders and the resulting composite materials were characterized by the structural and morphological point of view in order to determine their applicability in the field of bone regeneration. The biological assays demonstrated that the obtained scaffolds represent support that is accepted by the cell cultures. Through simulated body fluid immersion, the biodegradability of the composites was highlighted, with fiber fragmentation and surface degradation within the testing period.
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Affiliation(s)
- Sorin-Ion Jinga
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Politehnica University of Bucharest, RO-011061 Bucharest, Romania.
| | - Andreea-Ioana Zamfirescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Politehnica University of Bucharest, RO-011061 Bucharest, Romania.
| | - Georgeta Voicu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Politehnica University of Bucharest, RO-011061 Bucharest, Romania.
| | - Monica Enculescu
- Laboratory of Multifunctional Materials and Structures, National Institute of Materials Physics, RO-077125 Magurele, Romania.
| | - Alexandru Evanghelidis
- Laboratory of Multifunctional Materials and Structures, National Institute of Materials Physics, RO-077125 Magurele, Romania.
| | - Cristina Busuioc
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Politehnica University of Bucharest, RO-011061 Bucharest, Romania.
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Preem L, Vaarmets E, Meos A, Jõgi I, Putrinš M, Tenson T, Kogermann K. Effects and efficacy of different sterilization and disinfection methods on electrospun drug delivery systems. Int J Pharm 2019; 567:118450. [PMID: 31229531 DOI: 10.1016/j.ijpharm.2019.118450] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 06/15/2019] [Accepted: 06/19/2019] [Indexed: 02/03/2023]
Abstract
Microbiological quality of a pharmaceutical product is an essential requirement ensuring patient safety, thus effective sterilization/disinfection methods need to be found. The aim of this study was to evaluate the efficacy of different sterilization/disinfection methods on drug-loaded electrospun matrices and the impact of these treatments on the functionality related characteristics of these matrices. The sterilization efficacy of gamma-irradiation, ultraviolet-irradiation, in situ generated chlorine gas and low-pressure argon plasma treatment were evaluated on two different chloramphenicol-loaded electrospun matrices using pristine polycaprolactone (PCL) as a carrier polymer or PCL in combination with polyethylene oxide. Drug stability, solid state properties, morphology, mechanical properties, swelling, biodegradation and drug release kinetics were studied before and after the treatments. It was shown that all tested methods help to reduce bioburden and only plasma treated matrices were not sterile. At the same time drug degradation after the treatment can be considerable and depends not only on the susceptibility of the drug to degradation, but also on matrix properties (e.g. the nature of carrier polymers). Even though no morphological changes were observed, gamma sterilization increased the hardness and elasticity of PCL matrices as a result of increased crystallinity of the polymer. Plasma treatment was able to significantly enhance water absorption to otherwise hydrophobic PCL/CAM matrix and had tremendous impact on its drug release kinetics as the drug was instantly released from otherwise prolonged release formulation.
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Affiliation(s)
- Liis Preem
- Institute of Pharmacy, University of Tartu, Nooruse 1, 50411 Tartu, Estonia.
| | - Ebe Vaarmets
- Institute of Pharmacy, University of Tartu, Nooruse 1, 50411 Tartu, Estonia
| | - Andres Meos
- Institute of Pharmacy, University of Tartu, Nooruse 1, 50411 Tartu, Estonia.
| | - Indrek Jõgi
- Institute of Physics, University of Tartu, W. Ostwaldi 1, 50411 Tartu, Estonia.
| | - Marta Putrinš
- Institute of Technology, University of Tartu, Nooruse 1, 50411 Tartu, Estonia.
| | - Tanel Tenson
- Institute of Technology, University of Tartu, Nooruse 1, 50411 Tartu, Estonia.
| | - Karin Kogermann
- Institute of Pharmacy, University of Tartu, Nooruse 1, 50411 Tartu, Estonia.
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Electrospun Polycaprolactone Fibrous Membranes Containing Ag, TiO₂ and Na₂Ti₆O 13 Particles for Potential Use in Bone Regeneration. MEMBRANES 2019; 9:membranes9010012. [PMID: 30634630 PMCID: PMC6359384 DOI: 10.3390/membranes9010012] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 12/19/2018] [Accepted: 01/03/2019] [Indexed: 11/17/2022]
Abstract
Biocompatible and biodegradable membrane treatments for regeneration of bone are nowadays a promising solution in the medical field. Bioresorbable polymers are extensively used in membrane elaboration, where polycaprolactone (PCL) is used as base polymer. The goal of this work was to improve electrospun membranes’ biocompatibility and antibacterial properties by adding micro- and nanoparticles such as Ag, TiO2 and Na2Ti6O13. Micro/nanofiber morphologies of the obtained membranes were characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, differential scanning calorimetry, scanning electron microscopy, energy-dispersive X-ray spectroscopy and a tensile test. Also, for this study optical microscopy was used to observe DAPI-stained cells. Membranes of the different systems were electrospun to an average diameter of 1.02–1.76 μm. To evaluate the biological properties, cell viability was studied by growing NIH/3T3 cells on the microfibers. PCL/TiO2 strength was enhanced from 0.6 MPa to 6.3 MPa in comparison with PCL without particles. Antibacterial activity was observed in PCL/TiO2 and PCL/Na2Ti6O13 electrospun membranes using Staphylococcus aureus bacteria. Bioactivity of the membranes was confirmed with simulated body fluid (SBF) treatment. From this study, the ceramic particles TiO2 and Na2Ti6O13, combined with a PCL matrix with micro/nanoparticles, enhanced cell proliferation, adhesion and antibacterial properties. The electrospun composite with Na2Ti6O13 can be considered viable for tissue regenerative processes.
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Gao Y, Teoh TW, Wang Q, Williams GR. Electrospun organic–inorganic nanohybrids as sustained release drug delivery systems. J Mater Chem B 2017; 5:9165-9174. [DOI: 10.1039/c7tb01825h] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Novel organic–inorganic nanohybrids have been prepared, and are found to provide long-term extended drug release.
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Affiliation(s)
- Yanshan Gao
- College of Environmental Science and Engineering
- Beijing Forestry University
- Beijing 100083
- P. R. China
- UCL School of Pharmacy
| | - Tian Wei Teoh
- UCL School of Pharmacy
- University College London
- London WC1N 1AX
- UK
| | - Qiang Wang
- College of Environmental Science and Engineering
- Beijing Forestry University
- Beijing 100083
- P. R. China
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Electrospinning ofin situandex situsynthesized polyimide composites reinforced by titanate nanotubes. J Appl Polym Sci 2016. [DOI: 10.1002/app.44641] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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