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Minim PR, de Azevedo-Silva LJ, Ferrairo BM, Pereira LF, Goulart CA, Monteiro-Sousa RS, Lisboa Filho PN, Fortulan CA, Salomão R, Borges AFS, Rubo JH. The combined effects of binder addition and different sintering methods on the mechanical properties of bovine hydroxyapatite. J Mech Behav Biomed Mater 2023; 144:105993. [PMID: 37385128 DOI: 10.1016/j.jmbbm.2023.105993] [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: 05/06/2023] [Revised: 06/21/2023] [Accepted: 06/24/2023] [Indexed: 07/01/2023]
Abstract
Hydroxyapatite (HA) from bovine bones has been used as a biomaterial in dentistry due to its biocompatibility and bioactivity. However, dense HA bioceramics still present inadequate properties for applications that require high mechanical performance, such as infrastructure. Microstructural reinforcements and control of ceramic processing steps are methods to improve these shortcomings. The present study assessed the effects of polyvinyl butyral (PVB) addition in combination with two sintering methodologies (2-step and conventional), on the mechanical properties of polycrystalline bovine HA bioceramics. The samples were divided into four groups (with 15 samples per group): conventional sintering with binder (HBC) and without binder (HWC) and 2-step sintering with (HB2) and without binder (HW2). HA was extracted from bovine bones, turned into nanoparticles in a ball mill, and subjected to uniaxial and isostatic pressing into discs, according to ISO 6872 standards. All groups were characterized by x-ray diffractometry (XRD), differential thermal analysis (DTA) and Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and relative density. Besides, mechanical analyses (biaxial flexural strength (BFS) and modulus of elasticity) were also performed. The characterization results demonstrated that adding agglutinants or the sintering method did not affect HA's chemical and structural characteristics. Even so, the HWC group showed the highest mechanical values for BFS and modulus of elasticity being 109.0 (98.0; 117.0) MPa and 105.17 ± 14.65 GPa, respectively. The HA ceramics submitted to conventional sintering and without the addition of binders achieved better mechanical properties than the other groups. The impacts of each variable were discussed and correlated to the final microstructures and mechanical properties.
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Affiliation(s)
- P R Minim
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - L J de Azevedo-Silva
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - B M Ferrairo
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - L F Pereira
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - C A Goulart
- Department of Physics, School of Sciences, São Paulo State University, Bauru, Brazil
| | - R S Monteiro-Sousa
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - P N Lisboa Filho
- Department of Physics, School of Sciences, São Paulo State University, Bauru, Brazil
| | - C A Fortulan
- Department of Mechanical Engineering, São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil
| | - R Salomão
- Department of Mechanical Engineering, São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil
| | - A F S Borges
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil.
| | - J H Rubo
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
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Comparison of Surface Properties of Sepiolite and Palygorskite: Surface Energy and Nanoroughness. NANOMATERIALS 2021; 11:nano11061579. [PMID: 34208459 PMCID: PMC8235428 DOI: 10.3390/nano11061579] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/14/2021] [Accepted: 06/10/2021] [Indexed: 11/16/2022]
Abstract
The surface properties of two sepiolite samples and one palygorskite sample were compared using inverse gas chromatography (IGC). Samples were previously conditioned at appropriate temperatures for the removal of all zeolitic water. Dispersive (or Lifshitz–van der Waals) component of the surface energy (γsd), specific interactions (−ΔGas) with π electron donor bases (1-alkenes), and nanomorphology indices (IMχT) based on the injections of cycloalkanes and a branched alkane were measured. From IGC data, at 240 °C, it was found that the palygorskite was clearly distinguished from the sepiolites. The palygorskite possessed a lower γsd, larger −ΔGas with 1-alkenes, and remarkably higher IMχT. Slight differences could also be observed between the two sepiolite samples with the same origin. The results were rationalized in terms of the structural features of the two studied minerals. The larger channels of the sepiolite allow for a better insertion of the n-alkanes (longer retention times) while excluding the bulkier probes, such as cyclooctane or 2,2,4-trimethylpentane. Accordingly, the corresponding γsd values were larger and the IMχT values were lower (higher surface nanoroughness) for the sepiolites. Regarding Lewis acid–base properties, all the sample’s surfaces evidenced a very strong amphoteric character. The present results highlight the potential of the evaluated samples for, e.g., adsorption processes with volatile organic compounds or matrix–filler interactions regarding the production of composite structures with Lewis acid–base matrices.
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Autié-Castro G, Reguera E, Cavalcante CL, Araujo AS, Rodríguez-Castellón E. Surface acid-base properties of Cu-BTC and Fe-BTC MOFs. An inverse gas chromatography and n-butylamine thermo desorption study. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119590] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Pires LA, de Azevedo Silva LJ, Ferrairo BM, Erbereli R, Lovo JFP, Ponce Gomes O, Rubo JH, Lisboa-Filho PN, Griggs JA, Fortulan CA, Borges AFS. Effects of ZnO/TiO 2 nanoparticle and TiO 2 nanotube additions to dense polycrystalline hydroxyapatite bioceramic from bovine bones. Dent Mater 2019; 36:e38-e46. [PMID: 31806496 DOI: 10.1016/j.dental.2019.11.006] [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: 05/23/2019] [Revised: 10/30/2019] [Accepted: 11/15/2019] [Indexed: 12/19/2022]
Abstract
OBJECTIVES A bovine dense hydroxyapatite ceramic (HA) was produced as new biomaterial, however, the production of a material with consistently high flexural strength remains challenging. The objective of this study was to evaluate the effects of ZnO nanoparticles, TiO2 nanoparticles, and TiO2 nanotubes (1%, 2%, and 5% by weight) on the microstructure and flexural strength of a bovine dense hydroxyapatite ceramic (HA). METHODS Discs (Ø=12.5mm; thickness=1.3mm) were prepared and subjected to X-ray diffraction (XRD), and observation with a field emission scanning electron microscope (FE-SEM), biaxial flexural strength (BFS) testing, and Vickers hardness (VH) testing. The BFS and VH data were subjected to ANOVA and Tukey post-hoc tests (α=0.05) and Weibull analysis. RESULTS The XRD showed that the addition of nanomaterials caused the formation of a secondary phase when 5% of the ZnO nanoparticles was used, or when all percentages of the TiO2 nanoparticles/nanotubes were used, and the HA crystallographic planes were maintained. Differences were not observed between the higher BFS values obtained with pure HA and those obtained with the 5% addition of TiO2 nanoparticles. However, the results were different compared with the other groups (α=0.05). The results obtained by Weibull analysis revealed that the 1%, 2%, and 5% addition of TiO2 nanotubes, and the 1% and 2% addition of TiO2 nanoparticles decreased the HA characteristic strength (σ0), while the Weibull modulus (m) increased when 5% of TiO2 nanoparticles, 1% and 2% of ZnO nanoparticles, and 2% of TiO2 nanoparticles were added, but with no statistical difference from the pure HA. The 5% addition of ZnO2 nanoparticles decreased the σ0 without changing m. Moreover, the 5% addition of TiO2 nanoparticles resulted in an m closest to that of pure HA. Regarding the VH results, the blend of HA with 1% and 2% addition of TiO2 nanoparticles exhibited the higher values, which were similar between the different addition ratios (p=0.102). Moreover, the addition of 5% TiO2 nanoparticles resulted in higher value compared with pure HA. SIGNIFICANCE This study demonstrated that the HA blend with 5% of TiO2 nanoparticles has the greatest potential as a bovine HA dense bioceramic reinforcement.
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Affiliation(s)
- Luara Aline Pires
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Alameda Dr. Octávio Pinheiro Brisolla, 9-75, Vila Universitária, 17012-901 Bauru, SP, Brazil.
| | - Lucas José de Azevedo Silva
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo, Alameda Dr. Octávio Pinheiro Brisolla, 9-75, Vila Universitária, 17012-901 Bauru, SP, Brazil.
| | - Brunna Mota Ferrairo
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo, Alameda Dr. Octávio Pinheiro Brisolla, 9-75, Vila Universitária, 17012-901 Bauru, SP, Brazil.
| | - Rogério Erbereli
- Department of Mechanical Engineering, São Carlos School of Engineering, University of São Paulo, Avenida Trabalhador São-Carlense, 400, Centro, 13566-590 São Carlos, SP, Brazil.
| | - João Fiore Parreira Lovo
- Department of Mechanical Engineering, São Carlos School of Engineering, University of São Paulo, Avenida Trabalhador São-Carlense, 400, Centro, 13566-590 São Carlos, SP, Brazil.
| | - Orisson Ponce Gomes
- Department of Physics, School of Sciences, São Paulo State University, Av. Engenheiro Luiz Edmundo Carrijo Coube, s/n, Vargem Limpa, 17033360 Bauru, SP, Brazil.
| | - José Henrique Rubo
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo, Alameda Dr. Octávio Pinheiro Brisolla, 9-75, Vila Universitária, 17012-901 Bauru, SP, Brazil.
| | - Paulo Noronha Lisboa-Filho
- Department of Physics, School of Sciences, São Paulo State University, Av. Engenheiro Luiz Edmundo Carrijo Coube, s/n, Vargem Limpa, 17033360 Bauru, SP, Brazil.
| | - Jason Alan Griggs
- Department of Biomedical Materials Science, School of Dentistry, University of Mississippi Medical Center, 2500 North State Street, Room D528, 39216-4505 Jackson, MS, United States.
| | - Carlos Alberto Fortulan
- Department of Mechanical Engineering, São Carlos School of Engineering, University of São Paulo, Avenida Trabalhador São-Carlense, 400, Centro, 13566-590 São Carlos, SP, Brazil.
| | - Ana Flávia Sanches Borges
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Alameda Dr. Octávio Pinheiro Brisolla, 9-75, Vila Universitária, 17012-901 Bauru, SP, Brazil.
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Coimbra P, Coelho MS, Gamelas JA. Surface characterization of polysaccharide scaffolds by inverse gas chromatography regarding application in tissue engineering. SURF INTERFACE ANAL 2019. [DOI: 10.1002/sia.6693] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Patrícia Coimbra
- Department of Chemical Engineering, CIEPQPFUniversity of Coimbra Coimbra Portugal
| | - Marta S.N. Coelho
- Department of Chemical Engineering, CIEPQPFUniversity of Coimbra Coimbra Portugal
| | - José A.F. Gamelas
- Department of Chemical Engineering, CIEPQPFUniversity of Coimbra Coimbra Portugal
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Bee SL, Mariatti M, Ahmad N, Yahaya B, Hamid ZA. Effect of the calcination temperature on the properties of natural hydroxyapatite derived from chicken bone wastes. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.matpr.2019.06.064] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Study of new practical ESR dosimeter based on carbonated hydroxyapatite and its dosimetric properties. PLoS One 2018; 13:e0197953. [PMID: 29813104 PMCID: PMC5973591 DOI: 10.1371/journal.pone.0197953] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 05/13/2018] [Indexed: 11/19/2022] Open
Abstract
The development of new dosimeters with good dosimetric properties is important for quality control in radiation applications. A new practical electron spin resonance (ESR) dosimeter based on carbonated hydroxyapatite that simulated the composition and structure of tooth enamel was specially synthesized. The synthesized material was investigated by transmission electron microscope, X-ray diffraction, fourier transform infrared spectroscopy and X-ray photo electron spectroscopy to confirm to the main composition of carbonated hydroxyapatite with CO32- successfully doped into the crystal lattice through optimizing the synthesis process of C/P molar ratio, pH value dynamical adjustment, annealing temperature and time. The dosimetric properties were systematically investigated by ESR spectroscopy. The results indicated that the radiation induced signal had a good dose response within a relatively wide dose range. The dose response was linear in the dose range of 0-400 Gy with a correlation coefficient of 0.9999 and had dose accumulative effect in the experimental dose range of 0-100 Gy. In a wider dose range up to 30 kGy, the dose response also presented linear feature in double-logarithmic coordinate system with a correlation coefficient of 0.9970. The dose detection limit was about 0.34Gy with a given probability of 95% confidence level depending upon a rigid calculation algorithm. The signal was extremely stable in the observation time of 360 days with a variation coefficient of 3.8%. The radiation sensitivity of the material showed no remarkable variation against photon energy from 662 KeV to 1.25 MeV and dose rate from 0.86 Gy/min to 12.17 Gy/min. The material showed more sensitive in lower photon energy range below 662 keV, which hint additional calibration may need when using in special photon energy condition. The preliminary results suggested that this newly developed dosimeter was potential to become a practical dosimeter that would expand the application fields of ESR dosimetry.
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Miculescu F, Maidaniuc A, Miculescu M, Dan Batalu N, Cătălin Ciocoiu R, Voicu ŞI, Stan GE, Thakur VK. Synthesis and Characterization of Jellified Composites from Bovine Bone-Derived Hydroxyapatite and Starch as Precursors for Robocasting. ACS OMEGA 2018; 3:1338-1349. [PMID: 30023802 PMCID: PMC6045479 DOI: 10.1021/acsomega.7b01855] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2017] [Accepted: 01/22/2018] [Indexed: 05/15/2023]
Abstract
Hydroxyapatite-starch composites solidify rapidly via jellification, making them suitable candidates for robocasting. However, many aspects related to hydroxyapatite powder characteristics, hydroxyapatite-starch interaction, and composites composition and properties need to be aligned with robocasting requirements to achieve a notable improvement in the functionality of printed scaffolds intended for bone regeneration. This article presents a preliminary evaluation of hydroxyapatite-starch microcomposites. Thermal analysis of the starting powders was performed for predicting composites' behavior during heat-induced densification. Also, morphology, mechanical properties, and hydroxyapatite-starch interaction were evaluated for the jellified composites and the porous bodies obtained after conventional sintering, for different starch additions, and for ceramic particle size distributions. The results indicate that starch could be used for hydroxyapatite consolidation in limited quantities, whereas the composites shall be processed under controlled temperature. Due to a different mechanical behavior induced by particle size and geometry, a wide particle size distribution of hydroxyapatite powder is recommended for further robocasting ink development.
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Affiliation(s)
- Florin Miculescu
- Faculty
of Material Science and Engineering, Metallic Material Science, Physical
Metallurgy Department, Politehnica University
of Bucharest, 313 Splaiul
Independentei, 060042 Bucharest, Romania
| | - Andreea Maidaniuc
- Faculty
of Material Science and Engineering, Metallic Material Science, Physical
Metallurgy Department, Politehnica University
of Bucharest, 313 Splaiul
Independentei, 060042 Bucharest, Romania
| | - Marian Miculescu
- Faculty
of Material Science and Engineering, Metallic Material Science, Physical
Metallurgy Department, Politehnica University
of Bucharest, 313 Splaiul
Independentei, 060042 Bucharest, Romania
| | - Nicolae Dan Batalu
- Faculty
of Material Science and Engineering, Metallic Material Science, Physical
Metallurgy Department, Politehnica University
of Bucharest, 313 Splaiul
Independentei, 060042 Bucharest, Romania
| | - Robert Cătălin Ciocoiu
- Faculty
of Material Science and Engineering, Metallic Material Science, Physical
Metallurgy Department, Politehnica University
of Bucharest, 313 Splaiul
Independentei, 060042 Bucharest, Romania
| | - Ştefan Ioan Voicu
- Faculty
of Applied Chemistry and Materials Science, Department of Analytical
Chemistry and Environmental Engineering, Politehnica University of Bucharest, 1-7 Gheorghe Polizu, 060042 Bucharest, Romania
| | - George E. Stan
- Laboratory
of Multifunctional Materials and Structures, National Institute of Materials Physics, Atomistilor Street, No. 405A,
P.O. Box MG 7, 077125 Magurele, Romania
| | - Vijay Kumar Thakur
- School
of Aerospace, Transport and Manufacturing, Enhanced Composites and
Structures Center, Cranfield University, College Road, Cranfield, MK43 0AL Bedfordshire, United
Kingdom
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Gamelas JAF, Salvador A, Hidalgo J, Ferreira PJ, Tejado A. Unique Combination of Surface Energy and Lewis Acid-Base Characteristics of Superhydrophobic Cellulose Fibers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:927-935. [PMID: 28033707 DOI: 10.1021/acs.langmuir.6b03970] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Cellulose fibers were first functionalized on their surface by silanization with trichloromethylsilane in an optimized gas-solid reaction, and the occurrence of the reaction was assessed using attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy. Then, the changes in the physicochemical surface properties of the material were thoroughly assessed using inverse gas chromatography (IGC) and X-ray photoelectron spectroscopy as surface specific tools. A very surprising combination of results was obtained: (i) the dispersive component of the surface energy was found to decrease from 42 to 14 mJ m-2 (at 40 °C), the latter figure representing one of the lowest values ever reported (by IGC) for cellulose-based materials, and (ii) both Lewis acidic and Lewis basic characters of the fiber surface, as measured by the injection into the IGC columns of 15 different vapor probes, significantly increased with silanization. Moreover, those remarkable changes in the surface properties of the material were obtained at a low degree of silanization (as shown by ATR-FTIR). The present results may have a great impact in what concerns the application of the described type of superhydrophobic cellulose fibers for the production of new biocomposites: an unusual enhanced compatibility both with low-surface energy polymeric matrices, such as polyolefins, as well as with other types of matrices through Lewis acid-base interactions, can be predicted.
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Affiliation(s)
- J A F Gamelas
- Department of Chemical Engineering, CIEPQPF, University of Coimbra , Pólo II. R. Sílvio Lima, PT-3030-790 Coimbra, Portugal
| | - A Salvador
- Sustainable Construction Division, TECNALIA , Área Anardi 5, 20730 Azpeitia, Spain
| | - J Hidalgo
- Sustainable Construction Division, TECNALIA , Área Anardi 5, 20730 Azpeitia, Spain
| | - P J Ferreira
- Department of Chemical Engineering, CIEPQPF, University of Coimbra , Pólo II. R. Sílvio Lima, PT-3030-790 Coimbra, Portugal
| | - A Tejado
- Sustainable Construction Division, TECNALIA , Área Anardi 5, 20730 Azpeitia, Spain
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Li H, Luo B, Wen W, Zhou C, Tian L, Ramakrishna S. Deferoxamine immobilized poly(D,L-lactide) membrane via polydopamine adhesive coating: The influence on mouse embryo osteoblast precursor cells and human umbilical vein endothelial cells. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 70:701-709. [DOI: 10.1016/j.msec.2016.09.043] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 08/20/2016] [Accepted: 09/21/2016] [Indexed: 01/05/2023]
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Reinares-Fisac D, Veintemillas-Verdaguer S, Fernández-Díaz L. Conversion of biogenic aragonite into hydroxyapatite scaffolds in boiling solutions. CrystEngComm 2017. [DOI: 10.1039/c6ce01725h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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