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Nguyen QT, Vu DL, Le CD, Ahn KK. Enhancing the Performance of Triboelectric Generator: A Novel Approach Using Solid-Liquid Interface-Treated Foam and Metal Contacts. Polymers (Basel) 2023; 15:polym15102392. [PMID: 37242966 DOI: 10.3390/polym15102392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Revised: 05/14/2023] [Accepted: 05/16/2023] [Indexed: 05/28/2023] Open
Abstract
This work introduces a novel approach for enhancing the performance of a triboelectric generator (TEG) by using a solid-liquid interface-treated foam (SLITF) as its active layer, combined with two metal contacts of different work functions. SLITF is made by absorbing water into a cellulose foam, which enables charges generated by friction energy during the sliding motion to be separated and transferred through the conductive path formed by the hydrogen-bonded network of water molecules. Unlike traditional TEGs, the SLITF-TEG demonstrates an impressive current density of 3.57 A/m2 and can harvest electric power up to 0.174 W/m2 with an induced voltage of approximately 0.55 V. The device generates a direct current in the external circuit, eliminating the limitations of low current density and alternating current found in traditional TEGs. By connecting six-unit cells of SLITF-TEG in series and parallel, the peak voltage and current can be increased up to 3.2 V and 12.5 mA, respectively. Furthermore, the SLITF-TEG has the potential to serve as a self-powered vibration sensor with high accuracy (R2 = 0.99). The findings demonstrate the significant potential of the SLITF-TEG approach for efficiently harvesting low-frequency mechanical energy from the natural environment, with broad implications for a range of applications.
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Affiliation(s)
- Quang Tan Nguyen
- Graduate School of Mechanical Engineering, University of Ulsan, 93, Daehak-ro, Nam-gu, Ulsan 44610, Republic of Korea
| | - Duy Linh Vu
- School of Mechanical Engineering, University of Ulsan, 93, Daehak-ro, Nam-gu, Ulsan 44610, Republic of Korea
| | - Chau Duy Le
- Graduate School of Mechanical Engineering, University of Ulsan, 93, Daehak-ro, Nam-gu, Ulsan 44610, Republic of Korea
| | - Kyoung Kwan Ahn
- School of Mechanical Engineering, University of Ulsan, 93, Daehak-ro, Nam-gu, Ulsan 44610, Republic of Korea
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2
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Ferrari F, Striani R, Fico D, Alam MM, Greco A, Esposito Corcione C. An Overview on Wood Waste Valorization as Biopolymers and Biocomposites: Definition, Classification, Production, Properties and Applications. Polymers (Basel) 2022; 14:polym14245519. [PMID: 36559886 PMCID: PMC9787771 DOI: 10.3390/polym14245519] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
Bio-based polymers, obtained from natural biomass, are nowadays considered good candidates for the replacement of traditional fossil-derived plastics. The need for substituting traditional synthetic plastics is mainly driven by many concerns about their detrimental effects on the environment and human health. The most innovative way to produce bioplastics involves the use of raw materials derived from wastes. Raw materials are of vital importance for human and animal health and due to their economic and environmental benefits. Among these, wood waste is gaining popularity as an innovative raw material for biopolymer manufacturing. On the other hand, the use of wastes as a source to produce biopolymers and biocomposites is still under development and the processing methods are currently being studied in order to reach a high reproducibility and thus increase the yield of production. This study therefore aimed to cover the current developments in the classification, manufacturing, performances and fields of application of bio-based polymers, especially focusing on wood waste sources. The work was carried out using both a descriptive and an analytical methodology: first, a description of the state of art as it exists at present was reported, then the available information was analyzed to make a critical evaluation of the results. A second way to employ wood scraps involves their use as bio-reinforcements for composites; therefore, the increase in the mechanical response obtained by the addition of wood waste in different bio-based matrices was explored in this work. Results showed an increase in Young's modulus up to 9 GPa for wood-reinforced PLA and up to 6 GPa for wood-reinforced PHA.
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3
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Shilpha J, Meyappan V, Sakthivel N. Bioinspired synthesis of gold nanoparticles from Hemidesmus indicus L. root extract and their antibiofilm efficacy against Pseudomonas aeruginosa. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.10.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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4
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Novel and Facile Synthesis of Biodegradable Plastic Films from Cornmeal by Using the Microwave Polymerization Technique. J CHEM-NY 2022. [DOI: 10.1155/2022/5697099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Millions of tons of plastic are produced annually, but a major portion of plastic waste remains unrecycled. The uncycled plastic ultimately becomes a major source of solid trash and releases a variety of chemicals into our environment which can adversely affect the human health and marine life. In this study, a novel approach has been opted to synthesize a biodegradable plastic by using the microwave polymerization technique. In this novel approach, raw material (cornmeal), plasticizer (glycerin), and additive (vinegar) have been combined together to fabricate biodegradable plastic films from the microwave polymerization method. A number of rheological properties such as shear stress (Pa), shear rate (1/s), strain, and viscosity (Pa.s) of newly synthesized plastic were studied. These properties confirmed the presence of a shear thinning effect in the biodegradable plastic films on the basis of flow behavior of cornmeal. In order to check the water uptake ability and biodegradability of the cornmeal-based plastic films, water uptake and biodegradation tests were carried out. The fabricated films were neat, thin, and chewable and demonstrate promising characteristics. Therefore, these synthesized films can potentially become a suitable candidate in the packaging industry.
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5
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Amaraweera S, Gunathilake C, Gunawardene OHP, Dassanayake RS, Fernando NM, Wanninayaka DB, Rajapaksha SM, Manamperi A, Gangoda M, Manchanda A, Fernando C, Kulatunga AK, Manipura A. Preparation and Characterization of Dual-Modified Cassava Starch-Based Biodegradable Foams for Sustainable Packaging Applications. ACS OMEGA 2022; 7:19579-19590. [PMID: 35722021 PMCID: PMC9202043 DOI: 10.1021/acsomega.2c01292] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 05/16/2022] [Indexed: 06/15/2023]
Abstract
Starch and its derivatives have recently emerged as a sustainable and renewable alternative for petroleum-based expanded polystyrene (EPS) and expanded polypropylene (EPP) foam materials. In this study, biodegradable foam materials were prepared from cassava starch using a novel dual modification technique, combining microwave treatment and freeze-drying. The foam materials were prepared from starch solutions microwaved over different intervals. The starch-based foam materials were characterized using Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM), 13C nuclear magnetic resonance (13C-NMR) spectroscopy, and compression set test. Moreover, the water absorption capacities and density values of the foam materials were measured according to ASTM standards. The biodegradability test was carried out according to the aerobic compost environment test. The lowest water absorption capacities of 65.56% and 70.83% were exhibited for the cassava starch foam sample (MWB) prepared at a 20 s microwave treatment time and immersed in distilled water for 2 and 24 h, respectively. Furthermore, the lightweight cassava starch-based foam materials displayed density ranging from 124 to 245 kg/m3. The biodegradation test exhibited significant biodegradation of over 50% after 15 days for all the foam materials prepared. These results suggest that the dual-modified cassava starch-based biodegradable foams show potential in sustainable packaging applications by replacing petroleum-based materials.
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Affiliation(s)
- Sumedha
M. Amaraweera
- Department
of Manufacturing and Industrial Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya 20400, Sri Lanka
| | - Chamila Gunathilake
- Department
of Chemical and Process Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya 20400, Sri Lanka
- Department
of Nano Science Technology, Faculty of Technology, Wayamba University of Sri Lanka, Kuliyapitiya 60200, Sri Lanka
| | - Oneesha H. P. Gunawardene
- Department
of Chemical and Process Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya 20400, Sri Lanka
| | - Rohan S. Dassanayake
- Department
of Biosystems Technology, Faculty of Technology, University of Sri Jayewardenepura, Homagama 10200, Sri Lanka
| | - Nimasha M.L. Fernando
- Department
of Manufacturing and Industrial Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya 20400, Sri Lanka
| | - Drashana B. Wanninayaka
- Department
of Chemical and Process Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya 20400, Sri Lanka
| | - Suranga M. Rajapaksha
- Department
of Materials and Mechanical Technology, Faculty of Technology, University of Sri Jayewardenepura, Homagama 10200, Sri Lanka
| | - Asanga Manamperi
- Materials
Engineering Department, California Polytechnic
State University, San Luis
Obispo, California 93407, United States
| | - Mahinda Gangoda
- Department
of Chemistry and Biochemistry, Kent State
University, Kent, Ohio 44242, United States
| | - Amanpreet Manchanda
- Department
of Chemistry, California State University, Stanislaus, One University Circle, Turlock, California 95382, United States
| | - Chakrawarthige
A.N. Fernando
- Department
of Nano Science Technology, Faculty of Technology, Wayamba University of Sri Lanka, Kuliyapitiya 60200, Sri Lanka
| | - Asela K. Kulatunga
- Department
of Manufacturing and Industrial Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya 20400, Sri Lanka
| | - Aruna Manipura
- Department
of Chemical and Process Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya 20400, Sri Lanka
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6
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Zubair M, Ferrari R, Alagha O, Mu’azu ND, Blaisi NI, Ateeq IS, Manzar MS. Microwave Foaming of Materials: An Emerging Field. Polymers (Basel) 2020; 12:E2477. [PMID: 33113873 PMCID: PMC7692174 DOI: 10.3390/polym12112477] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 10/17/2020] [Accepted: 10/22/2020] [Indexed: 11/28/2022] Open
Abstract
In the last two decades, the application of microwave heating to the processing of materials has to become increasingly widespread. Microwave-assisted foaming processes show promise for industrial commercialization due to the potential advantages that microwaves have shown compared to conventional methods. These include reducing process time, improved energy efficiency, solvent-free foaming, reduced processing steps, and improved product quality. However, the interaction of microwave energy with foaming materials, the effects of critical processing factors on microwave foaming behavior, and the foamed product's final properties are still not well-explored. This article reviews the mechanism and principles of microwave foaming of different materials. The article critically evaluates the impact of influential foaming parameters such as blowing agent, viscosity, precursor properties, microwave conditions, additives, and filler on the interaction of microwave, foaming material, physical (expansion, cellular structure, and density), mechanical, and thermal properties of the resultant foamed product. Finally, the key challenges and opportunities for developing industrial microwave foaming processes are identified, and areas for potential future research works are highlighted.
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Affiliation(s)
- Mukarram Zubair
- Department of Environmental Engineering, College of Engineering, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31451, Saudi Arabia; (M.Z.); (N.D.M.); (N.I.B.); (M.S.M.)
| | - Rebecca Ferrari
- Food, Water, Waste Research Group, Faculty of Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, UK;
| | - Omar Alagha
- Department of Environmental Engineering, College of Engineering, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31451, Saudi Arabia; (M.Z.); (N.D.M.); (N.I.B.); (M.S.M.)
| | - Nuhu Dalhat Mu’azu
- Department of Environmental Engineering, College of Engineering, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31451, Saudi Arabia; (M.Z.); (N.D.M.); (N.I.B.); (M.S.M.)
| | - Nawaf I. Blaisi
- Department of Environmental Engineering, College of Engineering, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31451, Saudi Arabia; (M.Z.); (N.D.M.); (N.I.B.); (M.S.M.)
| | - Ijlal Shahrukh Ateeq
- Department of Biomedical Engineering, College of Engineering, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31451, Saudi Arabia;
| | - Mohammad Saood Manzar
- Department of Environmental Engineering, College of Engineering, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31451, Saudi Arabia; (M.Z.); (N.D.M.); (N.I.B.); (M.S.M.)
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7
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Compostable, fully biobased foams using PLA and micro cellulose for zero energy buildings. Sci Rep 2020; 10:17771. [PMID: 33082364 PMCID: PMC7576603 DOI: 10.1038/s41598-020-74478-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 09/22/2020] [Indexed: 11/08/2022] Open
Abstract
Ecological, health and environmental concerns are driving the need for bio-resourced foams for the building industry. In this paper, we examine foams made from polylactic acid (PLA) and micro cellulose fibrils (MCF). To ensure no volatile organic compounds in the foam, supercritical CO2 (sc-CO2) physical foaming of melt mixed systems was conducted. Mechanical and thermal conductivity properties were determined and applied to a net zero energy model house. The results showed that MCF had a concentration dependent impact on the foams. First structurally, the presence of MCF led to an initial increase followed by a decrease of open porosity, higher bulk density, lower expansion ratios and cell size. Differential Scanning Calorimetry and Scanning Electron Microscopy revealed that MCF decreased the glass transition of PLA allowing for a decrease in cell wall thickness when MCF was added. The mechanical performance initially increased with MCF and then decreased. This trend was mimicked by thermal insulation which initially improved. Biodegradation tests showed that the presence of cellulose in PLA improved the compostability of the foams. A maximum comparative mineralization of 95% was obtained for the PLA foam with 3 wt.% MCF when expressed as a fractional percentage of the pure cellulose reference. Energy simulations run on a model house showed that relative to an insulation of polyurethane, the bio-resourced foams led to no more than a 12% increase in heating and cooling. The energy efficiency of the foams was best at low MCF fractions.
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8
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Fasolino I, Raucci MG, Soriente A, Demitri C, Madaghiele M, Sannino A, Ambrosio L. Osteoinductive and anti-inflammatory properties of chitosan-based scaffolds for bone regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 105:110046. [DOI: 10.1016/j.msec.2019.110046] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 07/29/2019] [Accepted: 07/31/2019] [Indexed: 01/12/2023]
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9
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Soriente A, Fasolino I, Raucci MG, Demitri C, Madaghiele M, Giuri A, Sannino A, Ambrosio L. Effect of inorganic and organic bioactive signals decoration on the biological performance of chitosan scaffolds for bone tissue engineering. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2018; 29:62. [PMID: 29736686 DOI: 10.1007/s10856-018-6072-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2017] [Accepted: 04/21/2018] [Indexed: 06/08/2023]
Abstract
The present work is focused on the design of a bioactive chitosan-based scaffold functionalized with organic and inorganic signals to provide the biochemical cues for promoting stem cell osteogenic commitment. The first approach is based on the use of a sequence of 20 amino acids corresponding to a 68-87 sequence in knuckle epitope of BMP-2 that was coupled covalently to the carboxyl group of chitosan scaffold. Meanwhile, the second approach is based on the biomimetic treatment, which allows the formation of hydroxyapatite nuclei on the scaffold surface. Both scaffolds bioactivated with organic and inorganic signals induce higher expression of an early marker of osteogenic differentiation (ALP) than the neat scaffolds after 3 days of cell culture. However, scaffolds decorated with BMP-mimicking peptide show higher values of ALP than the biomineralized one. Nevertheless, the biomineralized scaffolds showed better cellular behaviour than neat scaffolds, demonstrating the good effect of hydroxyapatite deposits on hMSC osteogenic differentiation. At long incubation time no significant difference among the biomineralized and BMP-activated scaffolds was observed. Furthermore, the highest level of Osteocalcin expression (OCN) was observed for scaffold with BMP2 mimic-peptide at day 21. The overall results showed that the presence of bioactive signals on the scaffold surface allows an osteoinductive effect on hMSC in a basal medium, making the modified chitosan scaffolds a promising candidate for bone tissue regeneration.
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Affiliation(s)
- Alessandra Soriente
- Institute of Polymers, Composites and Biomaterials - National Research Council (IPCB-CNR), Mostra d'Oltremare Pad.20 - Viale J.F. Kennedy 54, Naples, 80125, Italy
| | - Ines Fasolino
- Institute of Polymers, Composites and Biomaterials - National Research Council (IPCB-CNR), Mostra d'Oltremare Pad.20 - Viale J.F. Kennedy 54, Naples, 80125, Italy
| | - Maria Grazia Raucci
- Institute of Polymers, Composites and Biomaterials - National Research Council (IPCB-CNR), Mostra d'Oltremare Pad.20 - Viale J.F. Kennedy 54, Naples, 80125, Italy.
| | - Christian Demitri
- Department of Engineering for Innovation, University of Salento, Via Monteroni, Lecce, 73100, Italy.
| | - Marta Madaghiele
- Department of Engineering for Innovation, University of Salento, Via Monteroni, Lecce, 73100, Italy
| | - Antonella Giuri
- Department of Engineering for Innovation, University of Salento, Via Monteroni, Lecce, 73100, Italy
| | - Alessandro Sannino
- Department of Engineering for Innovation, University of Salento, Via Monteroni, Lecce, 73100, Italy
| | - Luigi Ambrosio
- Institute of Polymers, Composites and Biomaterials - National Research Council (IPCB-CNR), Mostra d'Oltremare Pad.20 - Viale J.F. Kennedy 54, Naples, 80125, Italy
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10
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Giuri A, Masi S, Colella S, Listorti A, Rizzo A, Liscio A, Treossi E, Palermo V, Gigli G, Mele C, Esposito Corcione C. GO/PEDOT:PSS nanocomposites: effect of different dispersing agents on rheological, thermal, wettability and electrochemical properties. NANOTECHNOLOGY 2017; 28:174001. [PMID: 28367836 DOI: 10.1088/1361-6528/aa6517] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this work glucose (G), α-cyclodextrin (α-CD) and sodium salt of carboxymethyl cellulose (CMCNa) are used as dispersing agents for graphene oxide (GO), exploring the influence of both saccharide units and geometric/steric hindrance on the rheological, thermal, wettability and electrochemical properties of a GO/poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) nanocomposite. By acting on the saccharide-based additives, we can modulate the rheological, thermal, and wettability properties of the GO/PEDOT:PSS nanocomposite. Firstly, the influence of all the additives on the rheological behaviour of GO and PEDOT:PSS was investigated separately in order to understand the effect of the dispersing agent on both the components of the ternary nanocomposite, individually. Subsequently, steady shear and dynamic frequency tests were conducted on all the nanocomposite solutions, characterized by thermal, wettability and morphological analysis. Finally, the electrochemical properties of the GO/PEDOT composites with different dispersing agents for supercapacitors were investigated using cyclic voltammetry (CV). The CV results revealed that GO/PEDOT with glucose exhibited the highest specific capacitance among the systems investigated.
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Affiliation(s)
- Antonella Giuri
- Università del Salento, via per Monteroni, km 1, I-73100, Lecce, Italy. CNR-NANOTEC-Istituto di Nanotecnologia, Polo di Nanotecnologia, c/o Campus Ecotekne, via Monteroni, I-73100 Lecce, Italy
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11
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Effects of Genipin Concentration on Cross-Linked Chitosan Scaffolds for Bone Tissue Engineering: Structural Characterization and Evidence of Biocompatibility Features. INT J POLYM SCI 2017. [DOI: 10.1155/2017/8410750] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Genipin (GN) is a natural molecule extracted from the fruit of Gardenia jasminoides Ellis according to modern microbiological processes. Genipin is considered as a favorable cross-linking agent due to its low cytotoxicity compared to widely used cross-linkers; it cross-links compounds with primary amine groups such as proteins, collagen, and chitosan. Chitosan is a biocompatible polymer that is currently studied in bone tissue engineering for its capacity to promote growth and mineral-rich matrix deposition by osteoblasts in culture. In this work, two genipin cross-linked chitosan scaffolds for bone repair and regeneration were prepared with different GN concentrations, and their chemical, physical, and biological properties were explored. Scanning electron microscopy and mechanical tests revealed that nonremarkable changes in morphology, porosity, and mechanical strength of scaffolds are induced by increasing the cross-linking degree. Also, the degradation rate was shown to decrease while increasing the cross-linking degree, with the high cross-linking density of the scaffold disabling the hydrolysis activity. Finally, basic biocompatibility was investigated in vitro, by evaluating proliferation of two human-derived cell lines, namely, the MG63 (human immortalized osteosarcoma) and the hMSCs (human mesenchymal stem cells), as suitable cell models for bone tissue engineering applications of biomaterials.
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12
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Demitri C, Giuri A, De Benedictis VM, Raucci MG, Giugliano D, Sannino A, Ambrosio L. Microwave-induced porosity and bioactivation of chitosan-PEGDA scaffolds: morphology, mechanical properties and osteogenic differentiation. J Tissue Eng Regen Med 2016; 11:86-98. [DOI: 10.1002/term.2241] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Revised: 05/02/2016] [Accepted: 06/17/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Christian Demitri
- Department of Engineering for Innovation; University of Salento; Lecce Italy
| | - Antonella Giuri
- Department of Engineering for Innovation; University of Salento; Lecce Italy
| | | | - Maria Grazia Raucci
- Institute of Polymers, Composites and Biomaterials (IPCB); National Research Council of Italy Mostra d'Oltremare Pad.20; Naples Italy
| | - Daniela Giugliano
- Institute of Polymers, Composites and Biomaterials (IPCB); National Research Council of Italy Mostra d'Oltremare Pad.20; Naples Italy
| | - Alessandro Sannino
- Department of Engineering for Innovation; University of Salento; Lecce Italy
| | - Luigi Ambrosio
- Institute of Polymers, Composites and Biomaterials (IPCB); National Research Council of Italy Mostra d'Oltremare Pad.20; Naples Italy
- Department of Chemicals Science and Materials Technology; National Research Council of Italy (DSCTM-CNR); Rome Italy
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13
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Gordeyeva KS, Fall AB, Hall S, Wicklein B, Bergström L. Stabilizing nanocellulose-nonionic surfactant composite foams by delayed Ca-induced gelation. J Colloid Interface Sci 2016; 472:44-51. [DOI: 10.1016/j.jcis.2016.03.031] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 03/15/2016] [Accepted: 03/16/2016] [Indexed: 11/15/2022]
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14
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De Benedictis VM, Soloperto G, Demitri C. Correction of MHS Viscosimetric Constants upon Numerical Simulation of Temperature Induced Degradation Kinetic of Chitosan Solutions. Polymers (Basel) 2016; 8:E210. [PMID: 30979306 PMCID: PMC6432309 DOI: 10.3390/polym8060210] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Revised: 05/04/2016] [Accepted: 05/10/2016] [Indexed: 12/16/2022] Open
Abstract
The Mark⁻Houwink⁻Sakurada (MHS) equation allows for estimation of rheological properties, if the molecular weight is known along with good understanding of the polymer conformation. The intrinsic viscosity of a polymer solution is related to the polymer molecular weight according to the MHS equation, where the value of the constants is related to the specific solvent and its concentration. However, MHS constants do not account for other characteristics of the polymeric solutions, i.e., Deacetilation Degree (DD) when the solute is chitosan. In this paper, the degradation of chitosan in different acidic environments by thermal treatment is addressed. In particular, two different solutions are investigated (used as solvent acetic or hydrochloric acid) with different concentrations used for the preparation of chitosan solutions. The samples were treated at different temperatures (4, 30, and 80 °C) and time points (3, 6 and 24 h). Rheological, Gel Permeation Chromatography (GPC), Fourier Transform Infrared Spectroscopy (FT-IR), Differential Scanning Calorimetry (DSC) and Thermal Gravimetric Analyses (TGA) were performed in order to assess the degradation rate of the polymer backbones. Measured values of molecular weight have been integrated in the simulation of the batch degradation of chitosan solutions for evaluating MHS coefficients to be compared with their corresponding experimental values. Evaluating the relationship between the different parameters used in the preparation of chitosan solutions (e.g., temperature, time, acid type and concentration), and their contribution to the degradation of chitosan backbone, it is important to have a mathematical frame that could account for phenomena involved in polymer degradation that go beyond the solvent-solute combination. Therefore, the goal of the present work is to propose an integration of MHS coefficients for chitosan solutions that contemplate a deacetylation degree for chitosan systems or a more general substitution degree for polymers in which viscosity depends not only on molecular weight and solvent combinations.
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Affiliation(s)
| | | | - Christian Demitri
- Department of Engineering for Innovation, University of Salento, Via Monteroni, km 1, Lecce 73100, Italy.
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15
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Preparation and Characterization of EG-Chitosan Nanocomposites via Direct Exfoliation: A Green Methodology. Polymers (Basel) 2015. [DOI: 10.3390/polym7121535] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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16
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Demitri C, Raucci MG, Giuri A, De Benedictis VM, Giugliano D, Calcagnile P, Sannino A, Ambrosio L. Cellulose-based porous scaffold for bone tissue engineering applications: Assessment of hMSC proliferation and differentiation. J Biomed Mater Res A 2015; 104:726-733. [DOI: 10.1002/jbm.a.35611] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 10/30/2015] [Accepted: 10/30/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Christian Demitri
- Department of Engineering for Innovation; University of Salento; via Monteroni, Km 1 Lecce 73100 Italy
| | - Maria Grazia Raucci
- Institute of Polymers, Composites and Biomaterials (IPCB), National Research Council of Italy Mostra D'oltremare Pad.20; Viale Kennedy 54 Naples 80125 Italy
| | - Antonella Giuri
- Department of Engineering for Innovation; University of Salento; via Monteroni, Km 1 Lecce 73100 Italy
| | | | - Daniela Giugliano
- Institute of Polymers, Composites and Biomaterials (IPCB), National Research Council of Italy Mostra D'oltremare Pad.20; Viale Kennedy 54 Naples 80125 Italy
| | - Paola Calcagnile
- Department of Engineering for Innovation; University of Salento; via Monteroni, Km 1 Lecce 73100 Italy
| | - Alessandro Sannino
- Department of Engineering for Innovation; University of Salento; via Monteroni, Km 1 Lecce 73100 Italy
| | - Luigi Ambrosio
- Institute of Polymers, Composites and Biomaterials (IPCB), National Research Council of Italy Mostra D'oltremare Pad.20; Viale Kennedy 54 Naples 80125 Italy
- Department of Chemical Sciences and Materials Technology; National Research Council of Italy (DSCTM-CNR); P.Le Aldo Moro 7 Rome 00185 Italy
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Raucci MG, Alvarez-Perez MA, Demitri C, Giugliano D, De Benedictis V, Sannino A, Ambrosio L. Effect of citric acid crosslinking cellulose-based hydrogels on osteogenic differentiation. J Biomed Mater Res A 2014; 103:2045-56. [DOI: 10.1002/jbm.a.35343] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Revised: 09/17/2014] [Accepted: 09/24/2014] [Indexed: 01/23/2023]
Affiliation(s)
- M. G. Raucci
- Institute of Polymers, Composites and Biomaterials (IPCB), National Research Council of Italy; Mostra d'Oltremare Pad.20, Viale Kennedy 54 Naples 80125 Italy
| | - M. A. Alvarez-Perez
- Tissue Bioengineering Laboratory; DEPeI, Faculty of Dentistry, National Autonomous University of Mexico; Mexico DF 04510 Mexico
| | - C. Demitri
- Department of Engineering for Innovation; University of Salento; Via Monteroni Lecce 73100 Italy
| | - D. Giugliano
- Institute of Polymers, Composites and Biomaterials (IPCB), National Research Council of Italy; Mostra d'Oltremare Pad.20, Viale Kennedy 54 Naples 80125 Italy
| | - V. De Benedictis
- Department of Engineering for Innovation; University of Salento; Via Monteroni Lecce 73100 Italy
| | - A. Sannino
- Department of Engineering for Innovation; University of Salento; Via Monteroni Lecce 73100 Italy
| | - L. Ambrosio
- Institute of Polymers, Composites and Biomaterials (IPCB), National Research Council of Italy; Mostra d'Oltremare Pad.20, Viale Kennedy 54 Naples 80125 Italy
- Department of Chemicals Science and Materials Technology; National Research Council of Italy (DSCTM-CNR); P.le Aldo Moro 7 Rome 00185 Italy
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18
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Experimental Assessment of the Use of a Novel Superabsorbent polymer (SAP) for the Optimization ofWater Consumption in Agricultural Irrigation Process. WATER 2014. [DOI: 10.3390/w6072056] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Affiliation(s)
- Paolo A. Netti
- Centre for Advanced Biomaterials for Health Care, IIT@CRIB, Istituto Italiano di Tecnologia, and Interdisciplinary Research Centre on Biomaterials, University of Naples Federico II, Napoli, Italy
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