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Cicek Ozkan B, Guner M. Adjustable dielectric and bioactivity characteristics of chitosan-based composites via crosslinking approach and incorporation of graphene. Int J Biol Macromol 2024; 270:132125. [PMID: 38750849 DOI: 10.1016/j.ijbiomac.2024.132125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Revised: 05/03/2024] [Accepted: 05/04/2024] [Indexed: 05/20/2024]
Abstract
This study explores the structural, electrical, dielectric, and bioactivity properties of chitosan (CS) composites incorporating graphene (G) nanoparticles. Characterization techniques, including Field Emission Scanning Electron Microscopy (FE-SEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), dielectric spectroscopy, and in vitro testing in SBF, were employed to investigate the effects of G content and crosslinking. The XPS peak at 289.89 eV for CS-G10 indicates CC and CH bonds, suggesting significant interactions between chitosan's hydroxyl groups and graphene's carbon atoms, ensuring structural homogeneity. Dielectric constant (ε') gradually increased with G loading (0 %, 1 %, 5 %, and 10 %) for uncrosslinked composites, reaching 17.94, 18.92, 28.28, and 41.1, respectively. Crosslinked composites exhibited reduced ε' values (15.71, 15.42, 14.14, and 27.03) compared to non-crosslinked ones, with marginal increases post-percolation threshold (5 wt% G filling). XRD analysis revealed shifts in characteristic peaks of CS after SBF treatment, with new peaks at 28.9° and 48.5° indicating hydroxyapatite presence, confirming composite bioactivity. CS-G10/GA showed the highest bioactivity, suggesting promise for biomedical applications.
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Affiliation(s)
- Betul Cicek Ozkan
- Department of Metallurgical and Materials Engineering, Technology Faculty, Fırat University, 23119 Elazığ, Turkey.
| | - Melek Guner
- Department of Metallurgical and Materials Engineering, Technology Faculty, Fırat University, 23119 Elazığ, Turkey; Central Laboratory, Application, and Research Center, Batman University, 72070 Batman, Turkey
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de Oliveira E Silva Guerrero A, da Silva TN, Cardoso SA, da Silva FFF, de Carvalho Patricio BF, Gonçalves RP, Weissmuller G, El-Cheikh MC, Carneiro K, Barradas TN. Chitosan-based films filled with nanoencapsulated essential oil: Physical-chemical characterization and enhanced wound healing activity. Int J Biol Macromol 2024; 261:129049. [PMID: 38176510 DOI: 10.1016/j.ijbiomac.2023.129049] [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: 09/20/2023] [Revised: 12/13/2023] [Accepted: 12/24/2023] [Indexed: 01/06/2024]
Abstract
The economic burden of chronic wounds, the complexity of the process of tissue repair and the possibility of resistant bacterial infections, have triggered a significant research interest in the application of natural alternative therapies for wound healing. Biomolecules are intrinsically multi-active, as they affect multiple mechanisms involved in tissue repair phenomenon, including immunomodulatory, anti-inflammatory, cell proliferation, extra cellular matrix remodeling and angiogenesis. Chitosan features a unique combination of attributes, including intrinsic hemostatic, antimicrobial, and immunomodulatory properties, that make it an exceptional candidate for wound management, in the development of wound dressings and scaffolds. In this study, we produced nanoemulsions (NE) loaded with SFO, characterized them, and evaluated their tissue repairing properties. Dynamic light scattering (DLS) analysis confirmed the formation of a nanoemulsion with a droplet size of 21.12 ± 2.31 nm and a polydispersity index (PdI) of 0.159, indicating good stability for up to 90 days. To investigate the potential wound healing effects, SFO-loaded NE were applied on male C57BL/6 mice for seven consecutive days, producing a significantly higher wound closure efficiency (p < 0.05) for the group treated with SFO-loaded NE compared to the control group treated with the saline solution. This finding indicates that the SFO-loaded NE exhibits therapeutic properties that effectively promote wound healing in this experimental model. Then, SFO-loaded NE were incorporated into chitosan:polyvinyl alcohol (PVA)-based films. The inclusion of NE into the polymer matrix resulted in increased lipophilicity reflected by the contact angle results, while decreasing moisture absorption, water solubility, and crystallinity. Moreover, FTIR analysis confirmed the formation of new bonds between SFO-NE and the film matrix, which also impacted on porosity properties. Thermal analysis indicated a decrease in the glass transition temperature of the films due to the presence of SFO-NE, suggesting a plasticizing role of NE, confirmed by XRD results, that showed a decrease in the crystallinity of the blend films upon the addition of SFO-NE. AFM images showed no evidence of NE droplet aggregation in the Chitosan:PVA film matrix. Moisture absorption and water content decreased upon incorporation of SFO-loaded NE. Although the inclusion of NE increased hydrophobicity and water contact angle, the values remained within an acceptable range for wound healing applications. Overall, our results emphasize the significant tissue repairing properties of SFO-loaded NE and the potential of Chitosan:PVA films containing nanoencapsulated SFO as effective formulations for wound healing with notable tissue repairing properties.
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Affiliation(s)
- Adriana de Oliveira E Silva Guerrero
- Laboratório de Proliferação e Diferenciação Celular, Instituto de Ciências Biomédicas, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro (UFRJ), Avenida Carlos Chagas Filho, 373, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, RJ CEP 21941-902, Brazil
| | - Talita Nascimento da Silva
- Laboratório de Micro e Nanotecnologia, Instituto de Tecnologia Em Fármacos (Farmanguinhos), Fundação Oswaldo Cruz (Fiocruz), Rio de Janeiro, RJ 21040-361, Brazil
| | - Stephani Araujo Cardoso
- Programa de Pós-Graduação em Ciência e Tecnologia de Polímeros, Instituto de Macromoléculas, Universidade Federal do Rio de Janeiro (UFRJ), Avenida Carlos Chagas Filho, 373, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, RJ CEP 21941-902, Brazil
| | - Flavia Fernandes Ferreira da Silva
- Laboratório de Micro e Nanotecnologia, Instituto de Tecnologia Em Fármacos (Farmanguinhos), Fundação Oswaldo Cruz (Fiocruz), Rio de Janeiro, RJ 21040-361, Brazil
| | - Beatriz Ferreira de Carvalho Patricio
- Laboratório de Inovação Farmacêutica e Tecnológica, Departamento de Ciências Fisiológicas, Instituto Biomédico, Universidade Federal do Estado, Rio de Janeiro, Rua Frei Caneca, 94, sala 507 A, Centro, Rio de Janeiro, RJ CEP 20211-010, Brazil; Unidade de Microscopia do Centro Nacional de Biologia Estrutural e Bioimagem, Av. Carlos Chagas Filho, 373 - Centro de Ciências da Saúde - CCS - Bloco M, Cidade Universitária, Rio de Janeiro, RJ CEP 21941-902, Brazil
| | - Raquel Pires Gonçalves
- Brazilian Center for Research in Physics (CBPF), Instituto de Pesquisa Científica, R. Dr. Xavier Sigaud, 150, Rio de Janeiro, RJ CEP: 22290-180, Brazil
| | - Gilberto Weissmuller
- Unidade de Microscopia do Centro Nacional de Biologia Estrutural e Bioimagem, Av. Carlos Chagas Filho, 373 - Centro de Ciências da Saúde - CCS - Bloco M, Cidade Universitária, Rio de Janeiro, RJ CEP 21941-902, Brazil; Laboratório de Física Biológica, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho 373 - CCS - bloco G026, Cidade Universitária, Rio de Janeiro, RJ CEP: 21941-902, Brazil
| | - Marcia Cury El-Cheikh
- Laboratório de Proliferação e Diferenciação Celular, Instituto de Ciências Biomédicas, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro (UFRJ), Avenida Carlos Chagas Filho, 373, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, RJ CEP 21941-902, Brazil
| | - Katia Carneiro
- Laboratório de Proliferação e Diferenciação Celular, Instituto de Ciências Biomédicas, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro (UFRJ), Avenida Carlos Chagas Filho, 373, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, RJ CEP 21941-902, Brazil
| | - Thaís Nogueira Barradas
- Departamento de Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal de Juiz de Fora. Brazil.
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Lairenjam PD, Sukumaran SK, Satapathy DK. Modulation of Optical Anisotropy in Chitosan Thin Films: Role of Swelling. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pradipkanti Devi Lairenjam
- Soft Materials Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India
- Molecular Electronics Laboratory, Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru 560064, India
| | - Sathish K. Sukumaran
- Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa 992-8510, Japan
| | - Dillip K. Satapathy
- Soft Materials Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India
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Sayama D, Hatanaka M, Miyasaka M. Switching of optical‐resolution selectivity through the Onsager's reaction field: Chiral recognition of
dl
‐amino acids by hydrophilic/hydrophobic chitosans. J Appl Polym Sci 2020. [DOI: 10.1002/app.48317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Daisuke Sayama
- Material Science and EngineeringGraduate School of Engineering, Tokyo Denki University, 5 Senju‐Asahi‐cho Adachi‐ku Tokyo 120‐8551 Japan
| | - Masashi Hatanaka
- Material Science and EngineeringGraduate School of Engineering, Tokyo Denki University, 5 Senju‐Asahi‐cho Adachi‐ku Tokyo 120‐8551 Japan
| | - Makoto Miyasaka
- Material Science and EngineeringGraduate School of Engineering, Tokyo Denki University, 5 Senju‐Asahi‐cho Adachi‐ku Tokyo 120‐8551 Japan
- Department of Applied ChemistrySchool of Engineering, Tokyo Denki University, 5 Senju‐Asahi‐cho Adachi‐ku Tokyo 120‐8551 Japan
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Ali AA, Elmahdy MM, Sarhan A, Abdel Hamid MI, Ahmed MT. Structure and dynamics of polypyrrole/chitosan nanocomposites. POLYM INT 2018. [DOI: 10.1002/pi.5685] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Asmaa A Ali
- Polymer Laboratory, Physics Department, Faculty of Science; Mansoura University; Mansoura Egypt
| | - Mahdy M Elmahdy
- Biological Advanced Materials Laboratory, Physics Department, Faculty of Science; Mansoura University; Mansoura Egypt
| | - Afaf Sarhan
- Polymer Laboratory, Physics Department, Faculty of Science; Mansoura University; Mansoura Egypt
| | - Maysa I Abdel Hamid
- Polymer Laboratory, Physics Department, Faculty of Science; Mansoura University; Mansoura Egypt
| | - Moustafa T Ahmed
- Polymer Laboratory, Physics Department, Faculty of Science; Mansoura University; Mansoura Egypt
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Pradipkanti L, Satapathy DK. Water desorption from a confined biopolymer. SOFT MATTER 2018; 14:2163-2169. [PMID: 29492505 DOI: 10.1039/c7sm02332d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We study desorption of water from a confined biopolymer (chitosan thin films) by employing temperature dependent specular X-ray reflectivity and spectroscopic ellipsometry. The water desorption is found to occur via three distinct stages with significantly different desorption rates. The distinct rates of water desorption are attributed to the presence of different kinds of water with disparate mobilities inside the biopolymer film. We identify two characteristic temperatures (Tc1 and Tc2) at which the water desorption rate changes abruptly. Interestingly, the characteristic temperatures decrease with decreasing the film thickness. The thickness dependence of the characteristic temperature is interpreted in the context of a higher mobility of polymer chains at the free surface for polymers under one-dimensional confinement.
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Affiliation(s)
- L Pradipkanti
- Soft Materials Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai - 600036, India.
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Kumar-Krishnan S, Prokhorov E, Ramírez M, Hernandez-Landaverde MA, Zarate-Triviño DG, Kovalenko Y, Sanchez IC, Méndez-Nonell J, Luna-Bárcenas G. Novel gigahertz frequency dielectric relaxations in chitosan films. SOFT MATTER 2014; 10:8673-8684. [PMID: 25254949 DOI: 10.1039/c4sm01804d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Molecular relaxations of chitosan films have been investigated in the wide frequency range of 0.1 to 3 × 10(9) Hz from -10 °C to 110 °C using dielectric spectroscopy. For the first time, two high-frequency relaxation processes (in the range 10(8) to 3 × 10(9) Hz) are reported in addition to the low frequency relaxations α and β. These two relaxation processes are related to the vibrations of OH and NH2/NH3(+), respectively. The high-frequency relaxations exhibit Arrhenius-type dependencies in the temperature range 10 °C to 54 °C with negative activation energy; this observation is traceable to hydrogen bonding reorientation. At temperatures above the glass transition temperature (54 °C), the activation energy changes from negative to positive values due to breaking of hydrogen bonding and water loss. Upon cooling in a sealed environment, the activation energies of two relaxation processes are nearly zero. FTIR and XRD analyses reveal associated structural changes upon heating and cooling. These two new high-frequency relaxation processes can be attributed to the interaction of bound water with OH and NH2/NH3(+), respectively. A plausible scenario for these high-frequency relaxations is discussed in light of impedance spectroscopy, TGA, FTIR and XRD measurements.
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Affiliation(s)
- Siva Kumar-Krishnan
- Cinvestav Queretaro, Libramiento Norponiente 2000, Queretaro, QRO 76230, Mexico.
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