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Dos Santos Menezes L, Navarro da Rocha D, Nonato RC, Costa AR, Morales AR, Correr-Sobrinho L, Correr AB, Neves JG. Cellulose acetate scaffold coated with a hydroxyapatite/graphene oxide nanocomposite for application in tissue engineering. Proc Inst Mech Eng H 2024; 238:793-802. [PMID: 38902971 DOI: 10.1177/09544119241256715] [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] [Indexed: 06/22/2024]
Abstract
The objective of this study was to synthesize and characterize porous Cellulose Acetate (CA) scaffolds using the electrospinning technique and functionalize the surface of the scaffolds obtained through the dip-coating method with a Hydroxyapatite (HA) nanocomposite and varying concentrations of graphene oxide (GO) for application in tissue engineering regeneration techniques. The scaffolds were divided into four distinct groups based on their composition: 1) CA scaffolds; 2) CAHAC scaffolds; 3) CAHAGOC 1.0% scaffolds; 4) CAHAGOC 1.5% scaffolds. Scaffold analyses were conducted using X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Raman Spectroscopy, Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM/EDS), and in vitro cell viability assays (WST). For the biological test analysis, Variance (two-way) was used, followed by Tukey's post-test (α = 0.05). The XRD results revealed the predominant presence of CaP phases in the CAHAC, CAHAGOC 1.0%, and CAHAGOC 1.5% groups, emphasizing the presence of HA in the scaffolds. FTIR demonstrated characteristics of cellulose and PO4 bands in the groups containing HA, confirming the presence of CaP in the synthesized materials, as also indicated by XRD. Raman spectroscopy showed the presence of D and G bands, consistent with GO, confirming the successful incorporation of the HAGO nanocomposite into the scaffolds. The micrographs displayed overlapping electrospun fibers, forming the three-dimensional structure in the produced scaffolds. It was possible to observe hydroxyapatite crystals filling some of these pores, creating a suitable structure for cell adhesion, proliferation, and nutrition, as corroborated by the results of in vitro tests. All scaffolds exhibited high cell viability, with significant cell proliferation. Even after 48 h, there was a slight reduction in the number of cells, but a noteworthy increase in cell proliferation was evident in the CAHAGOC 1.5% group after 48 h (p < 0.05). In conclusion, it can be affirmed that the produced scaffolds demonstrated physical and biological characteristics and properties capable of promoting cell adhesion and proliferation. Therefore, they represent significant potential for application in tissue engineering, offering a new perspective regarding techniques and biomaterials applied in regenerative therapies.
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Affiliation(s)
- Luan Dos Santos Menezes
- Department of Restorative Dentistry - Dental Materials Area, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, Sao Paulo, Brazil
| | | | - Renato Carajelescov Nonato
- Department of Materials Engineering, School of Chemical Engineering, Universidade de Campinas, Campinas, Brazil
| | - Ana Rosa Costa
- Department of Restorative Dentistry - Dental Materials Area, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, Sao Paulo, Brazil
| | - Ana Rita Morales
- Department of Materials Engineering, School of Chemical Engineering, Universidade de Campinas, Campinas, Brazil
| | - Lourenço Correr-Sobrinho
- Department of Restorative Dentistry - Dental Materials Area, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, Sao Paulo, Brazil
| | - Américo Bortolazzo Correr
- Department of Restorative Dentistry - Dental Materials Area, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, Sao Paulo, Brazil
| | - José Guilherme Neves
- Department of Restorative Dentistry - Dental Materials Area, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, Sao Paulo, Brazil
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2
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Wei XY, Li W, Li J, Niu XT. Mussel-inspired polydopamine modified mica with enhanced mechanical strength and thermal performance of poly(lactic acid) coating. Int J Biol Macromol 2024; 273:133148. [PMID: 38897517 DOI: 10.1016/j.ijbiomac.2024.133148] [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: 01/29/2024] [Revised: 06/10/2024] [Accepted: 06/12/2024] [Indexed: 06/21/2024]
Abstract
Polylactic acid (PLA), as a green functional polymer, has been useful in various coating applications. However, due to the low mechanical strength and thermal stability of PLA, it needs to be improved in order to expand its application areas. In this work, a series of polylactic acid (PLA) nanocomposite films were prepared through introducing polydopamine-modified mica (PDA@MICA) as a self-assemble nanofiller to enhance its mechanical and thermal properties. The results demonstrated that PLA/PDA@MICA shows excellent mechanical properties. Tensile tests showed that PLA/PDA@MICA exhibits a 58.3 % increase in tensile strength and a 16.8 % increase in Young's modulus compared to pure PLA. Meanwhile, thermal performance testing shown the introduction of PDA@MICA led to an increase in crystallinities (Xc = 24.78 %). And the thermal decomposition temperature of PLA/PDA@MICA film (374 °C) was slightly higher than that of PLA film (367 °C). The simultaneous improvement of the mechanical and thermal properties was attributed to the formation of hydrogen bonds between PLA and PDA@MICA. In addition, the parallel arrangement of PDA@MICA and PLA macromolecular chains forms a unique "brick and mortar" structure in the coating, which enhances the mechanical properties of PLA/PDA@MICA composite coatings. This study reports a successful approach to simultaneously address the drawbacks of PLA, specifically its low thermal stability and mechanical strength, thereby promoting its widespread application in the coatings industry.
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Affiliation(s)
- Xin-Yue Wei
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Wei Li
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Jian Li
- Engineering Research Center of Advanced Wooden Materials, Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Xiao-Ting Niu
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China.
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3
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Bernardo MP, Rodrigues BC, Sechi A, Mattoso LH. Grafting of maleic anhydride on poly(lactic acid)/hydroxyapatite composites augments their ability to support osteogenic differentiation of human mesenchymal stem cells. J Biomater Appl 2023; 37:1286-1299. [PMID: 36537783 DOI: 10.1177/08853282221147422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Implantation of bone substitutes is the treatment of choice for bone defects exceeding a critical size, when self-healing becomes impossible. The use of 3D printing techniques allows the construction of scaffolds with customized properties. However, there is a lack of suitable materials for bone replacement. In this study, maleic anhydride-grafted poly (lactic acid) (MAPLA) was investigated as a potential compatibilizer agent for 3D-printed polylactic acid (PLA)/hydroxyapatite (HA) composites, in order to enhance the physicochemical and biological properties of the scaffolds. The grafting process was performed by reactive processing in a torque rheometer, with the evaluation of the use of different concentrations of maleic anhydride (MA). The success of the grafting reaction was confirmed by titration of acid groups and spectroscopic analyses, indicating the presence of succinic anhydride groups on the PLA chain. Morphological analysis of the PLA/HA 3D scaffolds, using SEM, revealed that the use of the compatibilizer resulted in a structure free from voids and holes. The compatibilization also increased the degradation process. On the other hand, TGA and DSC analyses revealed that the use of a compatibilizer had little effect on the thermal properties of the composite. Most importantly, the samples with compatibilizer were demonstrated to have a minimal cytotoxic effect on human mesenchymal stem cells (MSCs), promoting the osteogenic differentiation of these cells in a medium without the addition of classical osteogenic factors. Therefore, the grafting of PLA/HA composites improved their physicochemical and biological properties, especially the induction of MSC osteogenic differentiation, demonstrating the potential of these scaffolds for bone tissue replacement.
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Affiliation(s)
- Marcela P Bernardo
- National Nanotechnology Laboratory for Agribusiness, Brazilian Agricultural Research Corporation, 564899Embrapa Instrumentation, São Paulo, Brazil.,Department of Cell and Tumor Biology, Faculty of Medicine, 9165RWTH Aachen University, Aachen, Germany
| | - Bruna C Rodrigues
- National Nanotechnology Laboratory for Agribusiness, Brazilian Agricultural Research Corporation, 564899Embrapa Instrumentation, São Paulo, Brazil
| | - Antonio Sechi
- Department of Cell and Tumor Biology, Faculty of Medicine, 9165RWTH Aachen University, Aachen, Germany
| | - Luiz Hc Mattoso
- National Nanotechnology Laboratory for Agribusiness, Brazilian Agricultural Research Corporation, 564899Embrapa Instrumentation, São Paulo, Brazil
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4
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Chiloeches A, Fernández-García R, Fernández-García M, Mariano A, Bigioni I, Scotto d'Abusco A, Echeverría C, Muñoz-Bonilla A. PLA and PBAT-Based Electrospun Fibers Functionalized with Antibacterial Bio-Based Polymers. Macromol Biosci 2023; 23:e2200401. [PMID: 36443243 DOI: 10.1002/mabi.202200401] [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: 09/22/2022] [Revised: 11/04/2022] [Indexed: 11/30/2022]
Abstract
Antimicrobial fibers based on biodegradable polymers, poly(lactic acid) (PLA), and poly(butylene adipate-co-terephthalate) (PBAT) are prepared by electrospinning. For this purpose, a biodegradable/bio-based polyitaconate containing azoles groups (PTTI) is incorporated at 10 wt.% into the electrospinning formulations. The resulting fibers functionalized with azole moieties are uniform and free of beads. Then, the accessible azole groups are subjected to N-alkylation, treatment that provides cationic azolium groups with antibacterial activity at the surface of fibers. The positive charge density, roughness, and wettability of the cationic fibers are evaluated and compared with flat films. It is confirmed that these parameters exert an important effect on the antimicrobial properties, as well as the length of the alkylating agent and the hydrophobicity of the matrix. The quaternized PLA/PTTI fibers exhibit the highest efficiency against the tested bacteria, yielding a 4-Log reduction against S. aureus and 1.7-Log against MRSA. Then, biocompatibility and bioactivity of the fibers are evaluated in terms of adhesion, morphology and viability of fibroblasts. The results show no cytotoxic effect of the samples, however, a cytostatic effect is appreciated, which is ascribed to the strong electrostatic interactions between the positive charge at the fiber surface and the negative charge of the cell membranes.
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Affiliation(s)
- A Chiloeches
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/ Juan de la Cierva 3, Madrid, 28006, Spain.,Escuela Internacional de Doctorado de la Universidad Nacional de Educación a Distancia (UNED), C/ Bravo Murillo, 38, Madrid, 28015, Spain
| | - R Fernández-García
- Hospital Universitario de Móstoles C/ Dr. Luis Montes, s/n, Móstoles, Madrid, 28935, Spain
| | - M Fernández-García
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/ Juan de la Cierva 3, Madrid, 28006, Spain.,Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast-CSIC), Madrid, Spain
| | - A Mariano
- Department of Biochemical Sciences, Sapienza University of Rome, P.le A. Moro, 5, Rome, 00185, Italy
| | - I Bigioni
- Department of Biochemical Sciences, Sapienza University of Rome, P.le A. Moro, 5, Rome, 00185, Italy
| | - A Scotto d'Abusco
- Department of Biochemical Sciences, Sapienza University of Rome, P.le A. Moro, 5, Rome, 00185, Italy
| | - C Echeverría
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/ Juan de la Cierva 3, Madrid, 28006, Spain.,Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast-CSIC), Madrid, Spain
| | - A Muñoz-Bonilla
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/ Juan de la Cierva 3, Madrid, 28006, Spain.,Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast-CSIC), Madrid, Spain
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5
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Sharshir AI, Fayek SA, El-Gawad AFA, Farahat MA, Ismail MI, Ghobashy MM. Impact of γ-irradiation and SBR content in the compatibility of aminated (PVC/LLDPE)/ZnO for improving their AC conductivity and oil removal. Sci Rep 2022; 12:19616. [PMID: 36379977 PMCID: PMC9666560 DOI: 10.1038/s41598-022-21999-3] [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: 02/02/2022] [Accepted: 10/07/2022] [Indexed: 11/16/2022] Open
Abstract
In some cases, blends containing PVC and LLDPE show low compatibility. Adding styrene-butadiene rubber to the PVC/LLDPE mixtures leads to a noticeable increase in tensile strength and compatibility of the blends. Also, an improvement in tensile strength is observed after incorporating SBR compatibilizer resulting in entirely different gamma irradiation doses. Without a compatibilizer, the mixture exhibits a distributed PVC and LLDPE phase with variable sizes and shapes; even a sizable portion of the domains resemble droplets. Styrene butadiene rubber (SBR) and gamma radiation make mixtures of (PVC/LLDPE) more compatible. The SEM study of the blends demonstrated that adding the compatibilizer resulted in finer blend morphologies with less roughness. At the same time, gamma irradiation reduced this droplet and gave a more smooth surface. Poly(vinyl chloride) (PVC) was chemically modified with four different amino compounds, including ethylene diamine (EDA), aniline (An), p-anisidine (pA) and dimethyl aniline (DMA) for improving the electric conductivity and oil removal capability of the blend polymer. All ionomers were prepared by nucleophilic substitution in a solvent/non-solvent system under mild conditions. This work novelty shows a sustainable route for producing oil adsorption materials by recycling plastic waste. After the amination process of poly(vinyl chloride) the oil adsorption was significantly enhanced.
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Affiliation(s)
- A. I. Sharshir
- grid.429648.50000 0000 9052 0245Solid State and Accelerator Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - S. A. Fayek
- grid.429648.50000 0000 9052 0245Solid State and Accelerator Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - Amal F. Abd El-Gawad
- grid.31451.320000 0001 2158 2757Faculty of Engineering, Zagazig University, Zagazig, Egypt ,grid.31451.320000 0001 2158 2757Faculty of Computers and Informatics, University Zagazig, Zagazig, Egypt
| | - M. A. Farahat
- grid.31451.320000 0001 2158 2757Faculty of Engineering, Zagazig University, Zagazig, Egypt
| | - M. I. Ismail
- grid.31451.320000 0001 2158 2757Faculty of Engineering, Zagazig University, Zagazig, Egypt
| | - Mohamed Mohamady Ghobashy
- grid.429648.50000 0000 9052 0245Radiation Research of Polymer Chemistry Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority(EAEA), Cairo, Egypt
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6
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Mocanu AC, Miculescu F, Dascălu CA, Voicu ȘI, Pandele MA, Ciocoiu RC, Batalu D, Dondea S, Mitran V, Ciocan LT. Influence of Ceramic Particles Size and Ratio on Surface-Volume Features of the Naturally Derived HA-Reinforced Filaments for Biomedical Applications. J Funct Biomater 2022; 13:199. [PMID: 36278668 PMCID: PMC9590078 DOI: 10.3390/jfb13040199] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 10/18/2022] [Accepted: 10/19/2022] [Indexed: 11/06/2022] Open
Abstract
The intersection of the bone tissue reconstruction and additive manufacturing fields promoted the advancement to a prerequisite and new feedstock resource for high-performance bone-like-scaffolds manufacturing. In this paper, the proposed strategy was directed toward the use of bovine-bone-derived hydroxyapatite (HA) for surface properties enhancement and mechanical features reinforcement of the poly(lactic acid) matrix for composite filaments extrusion. The involvement of completely naturally derived materials in the technological process was based on factors such as sustainability, low cost, and a facile and green synthesis route. After the HA isolation and extraction from bovine bones by thermal processing, milling, and sorting, two dependent parameters—the HA particles size (<40 μm, <100 μm, and >125 μm) and ratio (0−50% with increments of 10%)—were simultaneously modulated for the first time during the incorporation into the polymeric matrix. The resulting melt mixtures were divided for cast pellets and extruded filaments development. Based on the obtained samples, the study was further designed to examine several key features by complementary surface−volume characterization techniques. Hence, the scanning electron microscopy and micro-CT results for all specimens revealed a uniform and homogenous dispersion of HA particles and an adequate adhesion at the ceramic/polymer interface, without outline pores, sustained by the shape and surface features of the synthesized ceramic particles. Moreover, an enhanced wettability (contact angle in the ~70−21° range) and gradual mechanical takeover were indicated once the HA ratio increased, independent of the particles size, which confirmed the benefits and feasibility of evenly blending the natural ceramic/polymeric components. The results correlation led to the selection of optimal technological parameters for the synthesis of adequate composite filaments destined for future additive manufacturing and biomedical applications.
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Affiliation(s)
- Aura-Cătălina Mocanu
- Department of Metallic Materials Science, Physical Metallurgy, Faculty of Materials Science and Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei, J Building, 060042 Bucharest, Romania
| | - Florin Miculescu
- Department of Metallic Materials Science, Physical Metallurgy, Faculty of Materials Science and Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei, J Building, 060042 Bucharest, Romania
| | - Cătălina-Andreea Dascălu
- Department of Metallic Materials Science, Physical Metallurgy, Faculty of Materials Science and Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei, J Building, 060042 Bucharest, Romania
| | - Ștefan Ioan Voicu
- Department of Analytical Chemistry and Environmental Engineering, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1-7 Gh. Polizu Str., 011061 Bucharest, Romania
| | - Mădălina-Andreea Pandele
- Department of Analytical Chemistry and Environmental Engineering, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1-7 Gh. Polizu Str., 011061 Bucharest, Romania
- Advanced Polymer Materials Group, University Politehnica of Bucharest, 1-7 Gh. Polizu Str., 011061 Bucharest, Romania
| | - Robert-Cătălin Ciocoiu
- Department of Metallic Materials Science, Physical Metallurgy, Faculty of Materials Science and Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei, J Building, 060042 Bucharest, Romania
| | - Dan Batalu
- Department of Metallic Materials Science, Physical Metallurgy, Faculty of Materials Science and Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei, J Building, 060042 Bucharest, Romania
| | - Sorina Dondea
- Department of Metallic Materials Science, Physical Metallurgy, Faculty of Materials Science and Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei, J Building, 060042 Bucharest, Romania
| | - Valentina Mitran
- Department of Biochemistry and Molecular Biology, University of Bucharest, 91-95 Spl. Independentei, 050095 Bucharest, Romania
| | - Lucian-Toma Ciocan
- Prosthetics Technology and Dental Materials Department, “Carol Davila” University of Medicine and Pharmacy, 37 Dionisie Lupu Street., 020022 Bucharest, Romania
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Motloung MP, Mofokeng TG, Mokhena TC, Ray SS. Recent advances on melt-spun fibers from biodegradable polymers and their composites. INT POLYM PROC 2022. [DOI: 10.1515/ipp-2022-0023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Biodegradable polymers have become important in different fields of application, where biodegradability and biocompatibility are required. Herein, the melt spinning of biodegradable polymers including poly(lactic acid), poly(butylene succinate), polyhydroxyalkanoate (PHA), poly(ɛ-caprolactone) and their biocomposites is critically reviewed. Biodegradable polymer fibers with added functionalities are in high demand for various applications, including biomedical, textiles, and others. Melt spinning is a suitable technique for the development of biodegradable polymer fibers in a large-scale quantity, and fibers with a high surface area can be obtained with this technique. The processing variables during spinning have a considerable impact on the resulting properties of the fibers. Therefore, in this review, the processing-property relationship in biodegradable polymers, blends, and their composites is provided. The morphological characteristics, load-bearing properties, and the potential application of melt-spun biodegradable fibers in various sectors are also provided.
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Affiliation(s)
- Mpho Phillip Motloung
- Centre for Nanostructures and Advanced Materials, DSI-CSIR Nanotechnology Innovation Centre , Council for Scientific and Industrial Research , Pretoria 0001 , South Africa
- Department of Chemical Sciences , University of Johannesburg , Doornfontein 2028 , Johannesburg , South Africa
| | - Tladi Gideon Mofokeng
- Centre for Nanostructures and Advanced Materials, DSI-CSIR Nanotechnology Innovation Centre , Council for Scientific and Industrial Research , Pretoria 0001 , South Africa
| | - Teboho Clement Mokhena
- Nanotechnology Innovation Centre (NIC), Advanced Materials Division , Mintek , Randburg 2125 , South Africa
| | - Suprakas Sinha Ray
- Centre for Nanostructures and Advanced Materials, DSI-CSIR Nanotechnology Innovation Centre , Council for Scientific and Industrial Research , Pretoria 0001 , South Africa
- Department of Chemical Sciences , University of Johannesburg , Doornfontein 2028 , Johannesburg , South Africa
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8
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Mehnath S, Muthuraj V, Jeyaraj M. Biomimetic and osteogenic natural HAP coated three dimensional implant for orthopaedic application. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111387] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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9
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PLA/Hydroxyapatite scaffolds exhibit in vitro immunological inertness and promote robust osteogenic differentiation of human mesenchymal stem cells without osteogenic stimuli. Sci Rep 2022; 12:2333. [PMID: 35149687 PMCID: PMC8837663 DOI: 10.1038/s41598-022-05207-w] [Citation(s) in RCA: 56] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 01/07/2022] [Indexed: 02/06/2023] Open
Abstract
Bone defects stand out as one of the greatest challenges of reconstructive surgery. Fused deposition modelling (FDM) allows for the printing of 3D scaffolds tailored to the morphology and size of bone damage in a patient-specific and high-precision manner. However, FDM still suffers from the lack of materials capable of efficiently supporting osteogenesis. In this study, we developed 3D-printed porous scaffolds composed of polylactic acid/hydroxyapatite (PLA/HA) composites with high ceramic contents (above 20%, w/w) by FDM. The mechanical properties of the PLA/HA scaffolds were compatible with those of trabecular bone. In vitro degradation tests revealed that HA can neutralize the acidification effect caused by PLA degradation, while simultaneously releasing calcium and phosphate ions. Importantly, 3D-printed PLA/HA did not induce the upregulation of activation markers nor the expression of inflammatory cytokines in dendritic cells thus exhibiting no immune-stimulatory properties in vitro. Evaluations using human mesenchymal stem cells (MSC) showed that pure PLA scaffolds exerted an osteoconductive effect, whereas PLA/HA scaffolds efficiently induced osteogenic differentiation of MSC even in the absence of any classical osteogenic stimuli. Our findings indicate that 3D-printed PLA scaffolds loaded with high concentrations of HA are most suitable for future applications in bone tissue engineering.
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10
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Huang Y, Brünig H, Boldt R, Müller MT, Wießner S. Fabrication of melt-spun fibers from irradiation modified biocompatible PLA/PCL blends. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2021.110895] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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11
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Huang Y, Brünig H, Müller MT, Wießner S. Melt spinning of
PLA
/
PCL
blends modified with electron induced reactive processing. J Appl Polym Sci 2021. [DOI: 10.1002/app.51902] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Ying Huang
- Institute of Polymer Materials Leibniz‐Institut für Polymerforschung Dresden e.V. Dresden Germany
- Institute of Materials Science Technische Universität Dresden Dresden Germany
| | - Harald Brünig
- Institute of Polymer Materials Leibniz‐Institut für Polymerforschung Dresden e.V. Dresden Germany
| | - Michael Thomas Müller
- Institute of Polymer Materials Leibniz‐Institut für Polymerforschung Dresden e.V. Dresden Germany
| | - Sven Wießner
- Institute of Polymer Materials Leibniz‐Institut für Polymerforschung Dresden e.V. Dresden Germany
- Institute of Materials Science Technische Universität Dresden Dresden Germany
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12
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Liu J, Jin L, Zhou Q, Huang W, Wang S, Huang X, Zhao X. Collagen Nanofilm-Coated Partially Deproteinized Bone Combined With Bone Mesenchymal Stem Cells for Rat Femoral Defect Repair by Bone Tissue Engineering. Ann Plast Surg 2021; 87:580-588. [PMID: 34139739 DOI: 10.1097/sap.0000000000002905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND The advantages of good biocompatibility, low degradation and low antigenicity of collagen, and the osteogenic differentiation characteristics of bone mesenchymal stem cells (BMSCs) were used to promote the recovery of bone defects using partially deproteinized bone (PDPB) by bone tissue engineering (BTE). METHODS The BMSCs were identified by examining their potential for osteogenic, lipogenic, and chondrogenic differentiation. The prepared pure PDPB was ground into bone blocks 4 × 2 × 2 mm in size, which were divided into the following groups: PDPB group, PDPB + collagen group, PDPB + collagen + BMSC group, PDPB with a composite collagen nanofilm, and BMSCs injected into the tail vein. At 2, 4, 6, and 8 weeks after surgery, the effects of the implants in the different groups on bone defect repair were continuously and dynamically observed through x-ray examination, gross specimen observation, histological evaluation, and microvascularization detection. RESULTS Postoperative x-ray examination and gross specimen observation revealed that, after 4 to 8 weeks, the external contour of the graft was gradually weakened, and the transverse comparison showed that the absorption of the graft and fusion of the defect were more obvious in PDPB + collagen + BMSC group than in PDPB group and PDPB + collagen group, and the healing was better (P < 0.05). Hematoxylin and eosin staining of histological sections showed very active proliferation of trabecular hematopoietic cells in groups PDPB + collagen + BMSC and PDPB + collagen. Masson's trichrome staining for evaluation of bone defect repair showed that the mean percent area of collagen fibers was greater in PDPB + collagen + BMSC group than in the PDPB group, with degradation of the scaffold material and the completion of repair. Immunofluorescence staining showed significantly enhanced expression of the vascular marker CD31 in group C (P < 0.05). CONCLUSIONS The proposed hybrid structure of the collagen matrix and PDPB provides an ideal 3-dimensional microenvironment for patient-specific BTE and cell therapy applications. The results showed that collagen appeared to regulate MSC-mediated osteogenesis and increase the migration and invasion of BMSCs. The combination of collagen nanofilm and biological bone transplantation with BMSC transplantation enhanced the proliferation and potential of the BMSCs for bone regeneration, successfully promoting bone repair after implantation at the defect site. This method may provide a new idea for treating clinical bone defects through BTE.
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Affiliation(s)
- Jiajie Liu
- From the Department of Plastic Surgery, Kunming Medical University
| | - Liang Jin
- From the Department of Plastic Surgery, Kunming Medical University
| | - Qingzhu Zhou
- From the Department of Plastic Surgery, Kunming Medical University
| | - Wenli Huang
- From the Department of Plastic Surgery, Kunming Medical University
| | - Songmei Wang
- From the Department of Plastic Surgery, Kunming Medical University
| | - Xinwei Huang
- Key Laboratory of The Second Affiliated Hospital of Kuming Medical College, Kunming, China
| | - Xian Zhao
- From the Department of Plastic Surgery, Kunming Medical University
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Ali AM. The impact of the thermal annealing conditions on the structural properties of polylactic acid fibers. Microsc Res Tech 2021; 85:875-881. [PMID: 34612570 DOI: 10.1002/jemt.23956] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 09/10/2021] [Accepted: 09/23/2021] [Indexed: 11/11/2022]
Abstract
Polylactic acid (PLA) is a prominent biomaterial for plentiful applications in medicine and industry. The main goal of using this new material is replacing polymers based on petrochemical. Different thermal and structural properties of PLA fibers were studied after the thermal treatment using two different conditions (taut and free ends). Different techniques were used to study the effect of the thermal treatment conditions on the crystallinity and molecular orientations for PLA fibers such as differential scanning calorimetry technique, X-ray diffraction technique, and polarized light microscopy. The impact of the thermal annealing treatment on both the crystallinity and crystalline orientation was calculated. In case of taut ends thermal annealing treatment method, the measured parameters were higher than the case of free ends thermal annealing condition. The oriented segment relaxation due to the thermal annealing results an increase in the crystallinity values, but it does not indicate that the molecular orientation will be high. Results showed that the orientation of crystal and crystallinity was improved after thermal treatment. The taut conditions of annealing show significant improvement of crystallinity than free conditions.
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Affiliation(s)
- Afaf M Ali
- Physics Department, Faculty of Science, Mansoura University, Mansoura, Egypt
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14
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Song Q, Prabakaran S, Duan J, Jeyaraj M, Mickymaray S, Paramasivam A, Rajan M. Enhanced bone tissue regeneration via bioactive electrospun fibrous composite coated titanium orthopedic implant. Int J Pharm 2021; 607:120961. [PMID: 34333026 DOI: 10.1016/j.ijpharm.2021.120961] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 11/30/2022]
Abstract
One of the very reliable, attractive, and cheapest techniques for synthesizing nanofibers for biomedical applications is electrospinning. Here, we have created a novel nanofibrous composite coated Ti plate to mimic an Extra Cellular Matrix (ECM) of native bone in order to enhance the bone tissue regeneration. An electrospun fibrous composite was obtained by the combination of minerals (Zn, Mg, Si) substituted hydroxyapatite (MHAP)/Polyethylene Glycol (PEG)/Cissus quadrangularis (CQ) extract. Fibrous composite's functionality, phase characteristics, and morphology were evaluated by FT-IR, XRD, and SEM techniques, respectively. The average fiber diameter of MHAP/PVA had decreased from ~274 to ~255 nm after incorporating PEG polymer. That further increased from ~255 to ~275 nm after adding CQ extract. Besides the bioactivity in SBF solution, the degradable nature was confirmed by immersing the fibrous composite in Tris-HCL solution. The degradable studies evaluate that the composite was degraded depending on time, and it degrades about 9.42% after 7 days of immersion. Osteoblasts like MG-63 cells differentiation, proliferation, and calcium deposition were also determined. These results show that this new fibrous composite exhibits advanced osteoblasts properties. Thus, we concluded that this new fibrous scaffold coated Ti implant could act as a better implant to mimic ECM of bone structure and to improve osteogenesis during bone regeneration.
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Affiliation(s)
- Qichun Song
- Department of Orthopaedics, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, China
| | - Selvakani Prabakaran
- Biomaterials in Medicinal Chemistry Laboratory, Department of Natural Products Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625021, India.
| | - Jiafeng Duan
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology Xi'an Jiaotong University, Xi'an 710004, China
| | | | - Suresh Mickymaray
- Department of Biology, College of Science, Al-Zulfi, Majmaah University, Majmaah 11952, Riyadh Region, Saudi Arabia
| | - Anand Paramasivam
- Department of Basic Medical Sciences, College of Dentistry, Al-Zulfi, Majmaah University, Majmaah 11952, Riyadh region, Saudi Arabia
| | - Mariappan Rajan
- Biomaterials in Medicinal Chemistry Laboratory, Department of Natural Products Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625021, India
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15
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Vozniak I, Beloshenko V, Savchenko B, Voznyak A. Improvement of mechanical properties of polylactide by equal channel multiple angular extrusion. J Appl Polym Sci 2021. [DOI: 10.1002/app.49720] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Iurii Vozniak
- Centre of Molecular and Macromolecular Studies Polish Academy of Sciences Lodz Poland
| | - Victor Beloshenko
- Donetsk Institute for Physics and Engineering named after A.A. Galkin National Academy of Sciences of Ukraine Kyiv Ukraine
| | - Bogdan Savchenko
- Department of applied ecology, Technology of polymers and chemical fibers Kyiv National University of Technologies and Design Kyiv Ukraine
| | - Andrej Voznyak
- Department of General Technical Disciplines and Vocational Training Kryvyi Rih State Pedagogical University Kryvyi Rih Ukraine
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16
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The Impact of the Addition of Compatibilizers on Poly (lactic acid) (PLA) Properties after Extrusion Process. Polymers (Basel) 2020; 12:polym12112688. [PMID: 33202587 PMCID: PMC7697721 DOI: 10.3390/polym12112688] [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: 10/22/2020] [Revised: 11/11/2020] [Accepted: 11/11/2020] [Indexed: 11/16/2022] Open
Abstract
Poly (lactic acid) (PLA), due to its biodegradability, biocompatibility, and renewability, is one of the most promising biobased polymers for replacing some of the petrol-based materials. Low flexibility of PLA is overcome, by blending it with olefin-based polymers, such as polypropylene (PP). However, the use of compatibilizing agents is required to attain final materials with suitable mechanical properties. Such agents, although essential, can affect PLA structure and, consequently, the mechanical properties of the PLA. To the best of our knowledge, this issue was never studied, and the results can contribute to achieving the best formulations of PLA-based blends according to their final applications. The thermal and mechanical properties of the extruded PLA, with three different commercial compatibilizing agents, were evaluated with the purpose of demonstrating how the compatibilizers can introduce structural differences into the PLA chain during the extrusion process. The combination of crystallinity, molecular weight, and the morphology of the samples after extrusion determines the final mechanical properties of PLA. Despite being a fundamental study, it is our aim to contribute to the sustainability of PLA-based industries. The addition of a 2.5% concentration of C1 compatibilizer seems to have less influence on the final morphology and mechanical properties of the blends.
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17
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Qin Y, Shen H, Han L, Zhu Z, Pan F, Yang S, Yin X. Mechanically Robust Janus Poly(lactic acid) Hybrid Fibrous Membranes toward Highly Efficient Switchable Separation of Surfactant-Stabilized Oil/Water Emulsions. ACS APPLIED MATERIALS & INTERFACES 2020; 12:50879-50888. [PMID: 33125210 DOI: 10.1021/acsami.0c15310] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
An ideal oil/water separation membrane should possess the characteristics of high flux and separation efficiency, recyclability, as well as good mechanical stability. Herein, a facile method is applied to fabricate a Janus polylactic acid (PLA) fibrous membrane for efficiently separating surfactant-stabilized oil/water mixtures. The Janus PLA fibrous membrane architecture was prepared by electrospinning a PLA/carbon nanotubes (CNTs) fibrous membrane and the subsequent electrospinning of a PLA/SiO2 nanofluids (nfs) membrane onto one side of the PLA/CNTs fibrous membrane. Due to the strong electrostatic interaction between SiO2 nfs and CNTs, synchronous enhancement and plasticization of PLA fibrous membranes were achieved, which was far superior to that reported in the literature. The introduction of CNTs had caused an upshift of the hydrophobicity of the PLA/CNTs fibrous membrane (water contact angle (WCA) > 140°). In contrast, SiO2 nfs bearing long-chain organic anions and cations located onto the surface of the fibers during electrospinning to achieve superhydrophilicity (WCA ≈ 0°). Benefiting from completely opposite wettability on both sides of the Janus membrane, the obtained asymmetric Janus membranes exhibited a high flux (1142-1485 L m-2 L-1) and excellent oil/water separation efficiency (>99%), which were superior to those reported for other Janus membranes. Furthermore, the Janus membranes showed desirable flux recovery without any treatment (>80% for water-in-oil emulsions and >90% for oil-in-water emulsions, respectively, after 11 cycles), showcasing promising applications for water treatment in the future.
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Affiliation(s)
| | | | - Lu Han
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Zongmin Zhu
- High-tech Organic Fibers Key Laboratory of Sichuan Province, Chengdu, Sichuan 610072, China
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18
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He Y, Xu WH, Zhang H, Qu JP. Constructing Bone-Mimicking High-Performance Structured Poly(lactic acid) by an Elongational Flow Field and Facile Annealing Process. ACS APPLIED MATERIALS & INTERFACES 2020; 12:13411-13420. [PMID: 32105444 DOI: 10.1021/acsami.0c01528] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Poly(lactic acid) (PLA) as one of the most promising biodegradable polymers is being tremendously restricted in large-scale applications by the notorious toughness, ductility, and heat distortion resistance. Manufacturing PLA with excellent toughness, considerable ductility, balanced strength, and great heat distortion resistance simultaneously is still a great challenge. Natural structural materials usually possess excellent strength and toughness by elaborately constructed sophisticated hierarchical architectures, however, completely reproducing natural structural materials' architecture have evidenced to be difficult. Inspired by the hierarchical construction of the compact bone, an innovational method with an intensive and continuous elongational flow field and facile annealing process was developed to create bone-mimicking structured PLA at an industrial scale. The bone-mimicking structured PLA with unique and novel hierarchical architectures of interlocked 3D network lamellae and large extended-chain lamellae connecting the regular lamellae was constructed by in situ formed oriented thermoplastic poly(ether)urethane nanofibers (TNFs) acting as "collagen fibers", orderly staggered PLA lamellae behaving as "hydroxyapatite (HA) nanocrystals", and the tenacious interface functioning as a "soft protein" adhesive layer. Attributed to the unique structure, it possesses super toughness (90.3 KJ/m2), high stiffness (2.15 GPa), balanced strength (52.6 MPa), and notable heat distortion resistance (holding at 163 °C for 1 h) simultaneously. These excellent performances of the structured PLA provide it with immense potential applications in both structural and bio-engineering materials fields such as artificial bones and tissue scaffolds.
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Affiliation(s)
- Yue He
- The National Engineering Research Center of Novel Equipment for Polymer Processing; The Key Laboratory of Polymer Processing Engineering, Ministry of Education; Guangdong Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing; School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou, Guangdong 510640, P. R. China
| | - Wen-Hua Xu
- The National Engineering Research Center of Novel Equipment for Polymer Processing; The Key Laboratory of Polymer Processing Engineering, Ministry of Education; Guangdong Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing; School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou, Guangdong 510640, P. R. China
| | - He Zhang
- The National Engineering Research Center of Novel Equipment for Polymer Processing; The Key Laboratory of Polymer Processing Engineering, Ministry of Education; Guangdong Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing; School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou, Guangdong 510640, P. R. China
| | - Jin-Ping Qu
- The National Engineering Research Center of Novel Equipment for Polymer Processing; The Key Laboratory of Polymer Processing Engineering, Ministry of Education; Guangdong Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing; School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou, Guangdong 510640, P. R. China
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19
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Pandele AM, Constantinescu A, Radu IC, Miculescu F, Ioan Voicu S, Ciocan LT. Synthesis and Characterization of PLA-Micro-structured Hydroxyapatite Composite Films. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E274. [PMID: 31936228 PMCID: PMC7014116 DOI: 10.3390/ma13020274] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 12/20/2019] [Accepted: 12/23/2019] [Indexed: 01/30/2023]
Abstract
This article presents a facile synthesis method used to obtain new composite films based on polylactic acid and micro-structured hydroxyapatite particles. The composite films were synthesized starting from a polymeric solution in chloroform (12 wt.%) in which various concentrations of hydroxyapatite (1, 2, and 4 wt.% related to polymer) were homogenously dispersed using ultrasonication followed by solvent evaporation. The synthesized composite films were morphologically (through SEM and atomic force microscopy (AFM)) and structurally (through FT-IR and Raman spectroscopy) characterized. The thermal behavior of the composite films was also determined. The SEM and AFM analyses showed the presence of micro-structured hydroxyapatite particles in the film's structure, as well as changes in the surface morphology. There was a significant decrease in the crystallinity of the composite films compared to the pure polymer, this being explained by a decrease in the arrangement of the polymer chains and a concurrent increase in the degree of their clutter. The presence of hydroxyapatite crystals did not have a significant influence on the degradation temperature of the composite film.
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Affiliation(s)
- Andreea Madalina Pandele
- Advanced Polymer Materials Group, Faculty of Applied Chemistry and Material Science, University Polytehnica of Bucharest, str. Gheorghe Polizu 1-7, 011061 Bucharest, Romania; (A.M.P.); (I.C.R.)
- Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Gheorghe Polizu 1-7, 011061 Bucharest, Romania
| | - Andreea Constantinescu
- Faculty of Materials Science, University Politehnica of Bucharest, Splaiul Independentei 313, 011061 Bucharest, Romania; (A.C.); (F.M.)
| | - Ionut Cristian Radu
- Advanced Polymer Materials Group, Faculty of Applied Chemistry and Material Science, University Polytehnica of Bucharest, str. Gheorghe Polizu 1-7, 011061 Bucharest, Romania; (A.M.P.); (I.C.R.)
| | - Florin Miculescu
- Faculty of Materials Science, University Politehnica of Bucharest, Splaiul Independentei 313, 011061 Bucharest, Romania; (A.C.); (F.M.)
| | - Stefan Ioan Voicu
- Advanced Polymer Materials Group, Faculty of Applied Chemistry and Material Science, University Polytehnica of Bucharest, str. Gheorghe Polizu 1-7, 011061 Bucharest, Romania; (A.M.P.); (I.C.R.)
- Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Gheorghe Polizu 1-7, 011061 Bucharest, Romania
| | - Lucian Toma Ciocan
- “Carol Davila” University of Medicine and Pharmacy, Prosthetics Technology and Dental Materials Department, 37, Dionisie Lupu Street, District 1, 020022 Bucharest, Romania;
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20
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Achieving all-polylactide fibers with significantly enhanced heat resistance and tensile strength via in situ formation of nanofibrilized stereocomplex polylactide. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.01.040] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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21
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Rezabeigi E, Demarquette NR. Ultraporous Membranes Electrospun from Nonsolvent-Induced Phase-Separated Ternary Systems. Macromol Rapid Commun 2019; 40:e1800880. [PMID: 30747462 DOI: 10.1002/marc.201800880] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 01/06/2019] [Indexed: 12/16/2022]
Abstract
Electrospinning of nonsolvent-induced phase-separated ternary (NIPST) systems has gained a lot of interest due to its potential to produce (nano)fibers, which are superficially and internally porous with nanoscale surface roughness. Membranes produced from such systems are expected to have a high specific surface area (SSA; e.g., more than 50 m2 g-1 ), an essential requirement for many of their applications. In spite of their advantages and potential, there are major issues regarding the electrospinning of NIPST systems that are not systematically addressed in the literature. In this paper, the most recent developments are reported and the potential and challenges associated with the electrospinning of NIPST systems are discussed. Furthermore, the essential steps to improve and optimize the electrospinning process of these systems are concisely discussed. By developing a modified time-dependent rheological model, a time range can be defined for NIPST systems as "electrospinnability window," in which fiber functionality and characteristics can be tailored through aging of the systems prior to electrospinning. Some potential post-treatment processes are also proposed based on the results of recent studies to stabilize as-electrospun membranes without damaging their highly porous fibers, which can guarantee their in-service mechanical and morphological stability.
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Affiliation(s)
- Ehsan Rezabeigi
- Department of Mining and Materials Engineering, McGill University, Wong Building, 3610 Rue University, Montréal, Québec, H3A 0C5, Canada
| | - Nicole R Demarquette
- Département de Génie Mécanique, École de Technologie Supérieure, 1100 rue Notre-Dame Ouest, Montréal, Québec, H3C 1K3, Canada
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22
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Fuoco T, Mathisen T, Finne-Wistrand A. Poly(l-lactide) and Poly(l-lactide- co-trimethylene carbonate) Melt-Spun Fibers: Structure-Processing-Properties Relationship. Biomacromolecules 2019; 20:1346-1361. [PMID: 30665299 DOI: 10.1021/acs.biomac.8b01739] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
l-Lactide/trimethylene carbonate copolymers have been produced as multifilament fibers by high-speed melt-spinning. The relationship existing between the composition, processing parameters and physical properties of the fibers has been disclosed by analyzing how the industrial process induced changes at the macromolecular level, i.e., the chain microstructure and crystallinity development. A poly(l-lactide) and three copolymers having trimethylene carbonate contents of 5, 10 and 18 mol % were synthesized with high molecular weight ( Mn) up to 377 kDa and narrow dispersity. Their microstructure, crystallinity and thermal properties were dictated by the composition. The spinnability was then assessed for all the as-polymerized materials: four melt-spun multifilament fibers with increasing linear density were collected for each (co)polymer at a fixed take-up speed of 1800 m min-1 varying the mass throughput during the extrusion. A linear correlation resulted between the as-spun fiber properties and the linear density. The as-spun fibers could be further oriented, developing more crystallinity and improving their tensile properties by a second stage of hot-drawing. This ability was dependent on the composition and crystallinity achieved during the melt-spinning and the parameters selected for the hot-drawing, such as temperature, draw ratio and input speed. The crystalline structure evolved to a more stable form, and the degree of crystallinity increased from 0-52% to 25-66%. Values of tensile strength and Young's modulus up to 0.32-0.61 GPa and 4.9-8.4 GPa were respectively achieved.
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Affiliation(s)
- Tiziana Fuoco
- Department of Fibre and Polymer Technology , KTH Royal Institute of Technology , 100 44 Stockholm , Sweden
| | | | - Anna Finne-Wistrand
- Department of Fibre and Polymer Technology , KTH Royal Institute of Technology , 100 44 Stockholm , Sweden
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23
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The effect of gamma-irradiation on morphology and properties of melt-spun poly (lactic acid)/cellulose fibers. Polym Degrad Stab 2019. [DOI: 10.1016/j.polymdegradstab.2018.11.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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24
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Thermal Degradation Characteristic and Flame Retardancy of Polylactide-Based Nanobiocomposites. Molecules 2018; 23:molecules23102648. [PMID: 30332755 PMCID: PMC6222373 DOI: 10.3390/molecules23102648] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 10/07/2018] [Accepted: 10/10/2018] [Indexed: 11/16/2022] Open
Abstract
Polylactide (PLA) is one of the most widely used organic bio-degradable polymers. However, it has poor flame retardancy characteristics. To address this disadvantage, we performed melt-blending of PLA with intumescent flame retardants (IFRs; melamine phosphate and pentaerythritol) in the presence of organically modified montmorillonite (OMMT), which resulted in nanobiocomposites with excellent intumescent char formation and improved flame retardant characteristics. Triphenyl benzyl phosphonium (OMMT-1)- and tributyl hexadecyl phosphonium (OMMT-2)-modified MMTs were used in this study. Thermogravimetric analysis in combination with Fourier transform infrared spectroscopy showed that these nanocomposites release a smaller amount of toxic gases during thermal degradation than unmodified PLA. Melt-rheological behaviors supported the conclusions drawn from the cone calorimeter data and char structure of the various nanobiocomposites. Moreover, the characteristic of the surfactant used for the modification of MMT played a crucial role in controlling the fire properties of the composites. For example, the nanocomposite containing 5 wt.% OMMT-1 showed significantly improved fire properties with a 47% and 68% decrease in peak heat and total heat release rates, respectively, as compared with those of unmodified PLA. In summary, melt-blending of PLA, IFR, and OMMT has potential in the development of high-performance PLA-based sustainable materials.
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25
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Cui T, Zhu Z, Cheng R, Tong YL, Peng G, Wang CF, Chen S. Facile Access to Wearable Device via Microfluidic Spinning of Robust and Aligned Fluorescent Microfibers. ACS APPLIED MATERIALS & INTERFACES 2018; 10:30785-30793. [PMID: 30113800 DOI: 10.1021/acsami.8b11926] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Microfluidic spinning technology (MST) has drawn much attention owing to its ideal platform for ordered fluorescent fibers, along with their large-scale manipulation, high efficiency, flexibility, and environment friendliness. Here, we employed the MST to fabricate a series of uniform fluorescent microfibers. By adjusting the microfluidic spinning parameters, the as-prepared microfibers of different diameters are successfully obtained. For more practice, these regular arranged fibers could be formed to versatile fluorescent codes by using various microfluidic chips. Also, these versatile fluorescent fibers could be further weaved into a white fluorescent film via continuous and cross-spinning process, which could be applied in a white light emitting diode (WLED) and a wearable device. Besides, we investigated the MST-directed microreactors to carry out green synthesis of CdSe quantum dots (QDs) fibers by the knot of Y-type microfluidic chip. The as-prepared CdSe QDs show nice optical property and are good candidate as phosphors in WLED. This strategy offers a facile and environment-friendly route to fluorescent hybrid microfibers and might open their potential application in optical devices, security, and fluorescent coding.
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Affiliation(s)
- Tingting Cui
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials , Nanjing Tech University , 5 Xin Mofan Road , Nanjing 210009 , P. R. China
| | - Zhijie Zhu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials , Nanjing Tech University , 5 Xin Mofan Road , Nanjing 210009 , P. R. China
| | - Rui Cheng
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials , Nanjing Tech University , 5 Xin Mofan Road , Nanjing 210009 , P. R. China
| | - Yu-Long Tong
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials , Nanjing Tech University , 5 Xin Mofan Road , Nanjing 210009 , P. R. China
| | - Gang Peng
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials , Nanjing Tech University , 5 Xin Mofan Road , Nanjing 210009 , P. R. China
| | - Cai-Feng Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials , Nanjing Tech University , 5 Xin Mofan Road , Nanjing 210009 , P. R. China
| | - Su Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials , Nanjing Tech University , 5 Xin Mofan Road , Nanjing 210009 , P. R. China
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26
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Osteogenic Differentiation of Human Mesenchymal Stem cells in a 3D Woven Scaffold. Sci Rep 2018; 8:10457. [PMID: 29993043 PMCID: PMC6041290 DOI: 10.1038/s41598-018-28699-x] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 06/28/2018] [Indexed: 11/08/2022] Open
Abstract
Fiber-based scaffolds produced by textile manufacturing technology offer versatile materials for tissue engineering applications since a wide range of crucial scaffold parameters, including porosity, pore size and interconnectivity, can be accurately controlled using 3D weaving. In this study, we developed a weavable, bioactive biodegradable composite fiber from poly (lactic acid) (PLA) and hydroxyapatite powder by melt spinning. Subsequently, scaffolds of these fibers were fabricated by 3D weaving. The differentiation of human mesenchymal stem cells (hMSCs) in vitro was studied on the 3D scaffolds and compared with differentiation on 2D substrates having the same material composition. Our data showed that the 3D woven scaffolds have a major impact on hMSCs proliferation and activation. The 3D architecture supports the differentiation of the hMSCs into osteoblast cells and enhances the production of mineralized bone matrix. The present study further confirms that a 3D scaffold promotes hMSCs differentiation into the osteoblast–lineage and bone mineralization.
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27
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Holcapkova P, Hurajova A, Kucharczyk P, Bazant P, Plachy T, Miskolczi N, Sedlarik V. Effect of polyethylene glycol plasticizer on long-term antibacterial activity and the release profile of bacteriocin nisin from polylactide blends. POLYM ADVAN TECHNOL 2018. [DOI: 10.1002/pat.4336] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Pavlina Holcapkova
- Centre of Polymer Systems; University Institute; Tomas Bata University in Zlin, Tr. T. Bati 5678 76001 Zlin Czech Republic
| | - Anna Hurajova
- Centre of Polymer Systems; University Institute; Tomas Bata University in Zlin, Tr. T. Bati 5678 76001 Zlin Czech Republic
| | - Pavel Kucharczyk
- Centre of Polymer Systems; University Institute; Tomas Bata University in Zlin, Tr. T. Bati 5678 76001 Zlin Czech Republic
| | - Pavel Bazant
- Centre of Polymer Systems; University Institute; Tomas Bata University in Zlin, Tr. T. Bati 5678 76001 Zlin Czech Republic
| | - Tomas Plachy
- Centre of Polymer Systems; University Institute; Tomas Bata University in Zlin, Tr. T. Bati 5678 76001 Zlin Czech Republic
| | - Norbert Miskolczi
- Faculty of Engineering, Institute of Chemical Engineering and Process Engineering, MOL Department of Hydrocarbon and Coal Processing; University of Pannonia; H-8200 Veszprém Egyetem u. 10 Hungary
| | - Vladimir Sedlarik
- Centre of Polymer Systems; University Institute; Tomas Bata University in Zlin, Tr. T. Bati 5678 76001 Zlin Czech Republic
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28
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Jeong JH, Choi MC, Nagappan S, Lee WK, Ha CS. Preparation and properties of poly(lactic acid)/lipophilized graphene oxide nanohybrids. POLYM INT 2017. [DOI: 10.1002/pi.5478] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jae-Hoon Jeong
- Department of Polymer Science and Engineering; Pusan National University; Busan Republic of Korea
| | - Myeon-Cheon Choi
- Department of Polymer Science and Engineering; Pusan National University; Busan Republic of Korea
| | - Saravanan Nagappan
- Department of Polymer Science and Engineering; Pusan National University; Busan Republic of Korea
| | - Won-Ki Lee
- Department of Polymer Engineering; Pukyong National University; Busan Republic of Korea
| | - Chang-Sik Ha
- Department of Polymer Science and Engineering; Pusan National University; Busan Republic of Korea
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29
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Mao D, Li Q, Bai N, Dong H, Li D. Porous stable poly(lactic acid)/ethyl cellulose/hydroxyapatite composite scaffolds prepared by a combined method for bone regeneration. Carbohydr Polym 2017; 180:104-111. [PMID: 29103485 DOI: 10.1016/j.carbpol.2017.10.031] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 10/04/2017] [Accepted: 10/06/2017] [Indexed: 01/13/2023]
Abstract
A major challenge in bone tissue engineering is the development of biomimetic scaffolds which should simultaneously meet mechanical strength and pore structure requirements. Herein, we combined technologies of high concentration solvent casting, particulate leaching, and room temperature compression molding to prepare a novel poly(lactic acid)/ethyl cellulose/hydroxyapatite (PLA/EC/HA) scaffold. The functional, structural and mechanical properties of the obtained porous scaffolds were characterized. The results indicated that the PLA/EC/HA scaffolds at the 20wt% HA loading level showed optimal mechanical properties and desired porous structure. Its porosity, contact angle, compressive yield strength and weight loss after 56days were 84.28±7.04%, 45.13±2.40°, 1.57±0.09MPa and 4.77±0.32%, respectively, which could satisfy the physiological demands to guide bone regeneration. Thus, the developed scaffolds have potential to be used as a bone substitute material for bone tissue engineering application.
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Affiliation(s)
- Daoyong Mao
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Qing Li
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
| | - Ningning Bai
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Hongzhou Dong
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Daikun Li
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
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30
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Effects of hydroxyapatite (HA) particles on the PLLA polymeric matrix for fabrication of absorbable interference screws. Polym Bull (Berl) 2017. [DOI: 10.1007/s00289-017-2158-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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31
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Guarino V, D’Albore M, Altobelli R, Ambrosio L. Polymer Bioprocessing to Fabricate 3D Scaffolds for Tissue Engineering. INT POLYM PROC 2016. [DOI: 10.3139/217.3239] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Abstract
Traditional methods for polymer processing involve the use of hazardous organic solvents which may compromise the biological function of scaffolds in tissue engineering. Indeed, the toxic effect of them on biological microenvironment has a tremendous impact on cell fate so altering the main activities involved in in vitro tissue formation. To date, extensive researches focus on seeking newer methods for bio-safely processing polymeric biomaterials to be implanted in the human body. Here, we aim at over viewing two approaches based on solvent free or green solvent based processes in order to identify alternative solutions to fabricate bio-inspired scaffolds to be successfully used in regenerative and degenerative medicine.
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Affiliation(s)
- V. Guarino
- Institute for Polymers , Composites and Biomaterials, National Research Council of Italy, Naples , Italy
| | - M. D’Albore
- Institute for Polymers , Composites and Biomaterials, National Research Council of Italy, Naples , Italy
| | - R. Altobelli
- Institute for Polymers , Composites and Biomaterials, National Research Council of Italy, Naples , Italy
| | - L. Ambrosio
- Institute for Polymers , Composites and Biomaterials, National Research Council of Italy, Naples , Italy
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32
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Aouat T, Kaci M, Devaux E, Campagne C, Cayla A, Dumazert L, Lopez-Cuesta JM. Morphological, Mechanical, and Thermal Characterization of Poly(Lactic Acid)/Cellulose Multifilament Fibers Prepared by Melt Spinning. ADVANCES IN POLYMER TECHNOLOGY 2016. [DOI: 10.1002/adv.21779] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Tassadit Aouat
- Laboratoire des Matériaux Polymères Avancés (LMPA); Université de Bejaia; Bejaia 06000 Algeria
| | - Mustapha Kaci
- Laboratoire des Matériaux Polymères Avancés (LMPA); Université de Bejaia; Bejaia 06000 Algeria
| | - Eric Devaux
- Ecole Nationale Supérieure des Arts et Industries Textiles (ENSAIT); GEMTEX; 9 rue de l'Ermitage Roubaix F-59100 France
| | - Christine Campagne
- Ecole Nationale Supérieure des Arts et Industries Textiles (ENSAIT); GEMTEX; 9 rue de l'Ermitage Roubaix F-59100 France
| | - Aurélie Cayla
- Ecole Nationale Supérieure des Arts et Industries Textiles (ENSAIT); GEMTEX; 9 rue de l'Ermitage Roubaix F-59100 France
| | - Loic Dumazert
- Centre des Matériaux des Mines d'Alès; Ecole des Mines d'Alès; 6, Avenue de Clavière Alès 30319 France
| | - José-Marie Lopez-Cuesta
- Centre des Matériaux des Mines d'Alès; Ecole des Mines d'Alès; 6, Avenue de Clavière Alès 30319 France
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33
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Liu Z, Chen Y, Ding W. Preparation, dynamic rheological behavior, crystallization, and mechanical properties of inorganic whiskers reinforced polylactic acid/hydroxyapatite nanocomposites. J Appl Polym Sci 2016. [DOI: 10.1002/app.43381] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zhuo Liu
- State Key Laboratory of Polymer Materials Engineering (Sichuan University), Polymer Research Institute of Sichuan University; Chengdu 610065 China
| | - Yinghong Chen
- State Key Laboratory of Polymer Materials Engineering (Sichuan University), Polymer Research Institute of Sichuan University; Chengdu 610065 China
| | - Weiwei Ding
- State Key Laboratory of Polymer Materials Engineering (Sichuan University), Polymer Research Institute of Sichuan University; Chengdu 610065 China
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34
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Mujica-Garcia A, Hooshmand S, Skrifvars M, Kenny JM, Oksman K, Peponi L. Poly(lactic acid) melt-spun fibers reinforced with functionalized cellulose nanocrystals. RSC Adv 2016. [DOI: 10.1039/c5ra22818b] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Poly(lactic acid)-cellulose nanocrystals (PLA/CNC) nanocomposite fibers with 1% weight fraction of nanocrystals were prepared via melt-spinning.
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Affiliation(s)
- A. Mujica-Garcia
- Dipartimento di Ingegneria Civile e Ambientale
- Università di Perugia
- Italy
- Instituto de Ciencia y Tecnología de Polímeros
- ICTP-CSIC
| | - S. Hooshmand
- Division of Materials Science
- Composite Centre Sweden
- Luleå University of Technology
- Luleå
- Sweden
| | - M. Skrifvars
- School of Engineering
- University of Borås
- Borås
- Sweden
| | - J. M. Kenny
- Dipartimento di Ingegneria Civile e Ambientale
- Università di Perugia
- Italy
- Instituto de Ciencia y Tecnología de Polímeros
- ICTP-CSIC
| | - K. Oksman
- Division of Materials Science
- Composite Centre Sweden
- Luleå University of Technology
- Luleå
- Sweden
| | - L. Peponi
- Instituto de Ciencia y Tecnología de Polímeros
- ICTP-CSIC
- Spain
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35
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Pasuri J, Holopainen J, Kokkonen H, Persson M, Kauppinen K, Lehenkari P, Santala E, Ritala M, Tuukkanen J. Osteoclasts in the interface with electrospun hydroxyapatite. Colloids Surf B Biointerfaces 2015; 135:774-783. [DOI: 10.1016/j.colsurfb.2015.08.045] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 08/23/2015] [Accepted: 08/25/2015] [Indexed: 12/11/2022]
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36
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Fermentation of aromatic lactate monomer and its polymerization to produce highly thermoresistant bioplastics. Polym J 2015. [DOI: 10.1038/pj.2015.80] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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37
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Hooshmand S, Aitomäki Y, Norberg N, Mathew AP, Oksman K. Dry-Spun Single-Filament Fibers Comprising Solely Cellulose Nanofibers from Bioresidue. ACS APPLIED MATERIALS & INTERFACES 2015; 7:13022-8. [PMID: 26017287 DOI: 10.1021/acsami.5b03091] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We demonstrated that low-cost and environmentally friendly filaments of native cellulose can be prepared by dry spinning an aqueous suspension of cellulose nanofibers (CNF). The CNF were extracted from banana rachis, a bioresidue from banana cultivation. The relationship between spinning rate, CNF concentration, and the mechanical properties of the filaments were investigated and the results showed that the modulus of the filaments was increased from 7.8 to 12.6 GPa and the strength increased from 131 to 222 MPa when the lowest concentration and highest speed was used. This improvement is believed to be due to an increased orientation of the CNF in the filament. A minimum concentration of 6.5 wt % was required for continuous filament spinning using the current setup. However, this relatively high concentration is thought to limit the orientation of the CNF in the filament. The process used in this study has a good potential for upscaling providing a continuous filament production with well-controlled speed, but further work is required to increase the orientation and subsequently the mechanical properties.
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Affiliation(s)
- Saleh Hooshmand
- †Division of Materials Science, Composite Centre Sweden, Luleå University of Technology, Luleå SE-97187, Sweden
| | - Yvonne Aitomäki
- †Division of Materials Science, Composite Centre Sweden, Luleå University of Technology, Luleå SE-97187, Sweden
| | | | - Aji P Mathew
- †Division of Materials Science, Composite Centre Sweden, Luleå University of Technology, Luleå SE-97187, Sweden
| | - Kristiina Oksman
- †Division of Materials Science, Composite Centre Sweden, Luleå University of Technology, Luleå SE-97187, Sweden
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38
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Wang Z, Xia S, Chen H, Wang S, Nie K, Li Z. Effects of poly(ethylene glycol) grafted silica nanoparticles on crystallization behavior of poly(d
-lactide). POLYM INT 2015. [DOI: 10.1002/pi.4914] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Zuoning Wang
- Anhui Province Key Laboratory of Environment-friendly Polymer Materials, College of Chemistry and Chemical Engineering; Anhui University; Hefei Anhui 230601 China
| | - Shuang Xia
- Laboratory of Polymer Physics and Chemistry, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Hong Chen
- Anhui Province Key Laboratory of Environment-friendly Polymer Materials, College of Chemistry and Chemical Engineering; Anhui University; Hefei Anhui 230601 China
| | - Song Wang
- Anhui Province Key Laboratory of Environment-friendly Polymer Materials, College of Chemistry and Chemical Engineering; Anhui University; Hefei Anhui 230601 China
| | - Kangming Nie
- Anhui Province Key Laboratory of Environment-friendly Polymer Materials, College of Chemistry and Chemical Engineering; Anhui University; Hefei Anhui 230601 China
| | - Zhibo Li
- Laboratory of Polymer Physics and Chemistry, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
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39
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Zhang X, Guan Y, Zhao Y, Zhang Z, Qiu D. Reinforcement of silicone rubber with raspberry-like SiO2
@Polymer composite particles. POLYM INT 2015. [DOI: 10.1002/pi.4900] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Xinping Zhang
- State Key Laboratory of Polymer Physics and Chemistry; Institute of Chemistry, Chinese Academy of Sciences; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100190 China
| | - Yinyan Guan
- School of Science; Shenyang University of Technology; Shenyang 110870 China
| | - Yunfeng Zhao
- Laboratory of Advanced Polymeric Materials; Institute of Chemistry, Chinese Academy of Sciences; Beijing 100190 China
| | - Zhijie Zhang
- Laboratory of Advanced Polymeric Materials; Institute of Chemistry, Chinese Academy of Sciences; Beijing 100190 China
| | - Dong Qiu
- State Key Laboratory of Polymer Physics and Chemistry; Institute of Chemistry, Chinese Academy of Sciences; Beijing 100190 China
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40
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Chen C, He BX, Wang SL, Yuan GP, Zhang L. Unexpected observation of highly thermostable transcrystallinity of poly(lactic acid) induced by aligned carbon nanotubes. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2014.12.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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41
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Banerjee BS, Balasubramanian K. Nanotexturing of PC/n-HA nanocomposites by innovative and advanced spray system. RSC Adv 2015. [DOI: 10.1039/c4ra15488f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Nanoscale texturing of n-HA filler on PC matrix is ameliorated by advanced engineered spray techniques viz. spary gun and centrifuged spray dryer, modifying properties of biomedical grade screw/plate coating application.
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Affiliation(s)
| | - K. Balasubramanian
- Department of Materials Engineering
- DIAT (DU)
- Ministry of Defence
- Pune
- India
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42
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In-situ dispersed photopolymerization of cyclic acetals/hydroxyapatite composites: Effects of the content of hydroxyapatite. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 46:239-45. [DOI: 10.1016/j.msec.2014.10.040] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Revised: 08/16/2014] [Accepted: 10/19/2014] [Indexed: 11/22/2022]
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43
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Xie L, Xu H, Niu B, Ji X, Chen J, Li ZM, Hsiao BS, Zhong GJ. Unprecedented Access to Strong and Ductile Poly(lactic acid) by Introducing In Situ Nanofibrillar Poly(butylene succinate) for Green Packaging. Biomacromolecules 2014; 15:4054-64. [DOI: 10.1021/bm5010993] [Citation(s) in RCA: 123] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Lan Xie
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu, 610065, Sichuan, People’s Republic of China
| | - Huan Xu
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu, 610065, Sichuan, People’s Republic of China
| | - Ben Niu
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu, 610065, Sichuan, People’s Republic of China
| | - Xu Ji
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu, 610065, Sichuan, People’s Republic of China
- College
of Chemical Engineering, Sichuan University, Chengdu, 610065, Sichuan People’s Republic of China
| | - Jun Chen
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu, 610065, Sichuan, People’s Republic of China
| | - Zhong-Ming Li
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu, 610065, Sichuan, People’s Republic of China
| | - Benjamin S. Hsiao
- Department
of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States
| | - Gan-Ji Zhong
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu, 610065, Sichuan, People’s Republic of China
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44
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Hu Y, Gu X, Yang Y, Huang J, Hu M, Chen W, Tong Z, Wang C. Facile fabrication of poly(L-lactic acid)-grafted hydroxyapatite/poly(lactic-co-glycolic acid) scaffolds by Pickering high internal phase emulsion templates. ACS APPLIED MATERIALS & INTERFACES 2014; 6:17166-17175. [PMID: 25243730 DOI: 10.1021/am504877h] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Porous scaffolds consisting of bioactive inorganic nanoparticles and biodegradable polymers have gained much interest in bone tissue engineering. We report here a facile approach to fabricating poly(l-lactic acid)-grafted hydroxyapatite (g-HAp)/poly(lactide-co-glycolide) (PLGA) nanocomposite (NC) porous scaffolds by solvent evaporation of Pickering high internal phase emulsion (HIPE) templates, where g-HAp nanoparticles act as particulate stabilizers. The resultant porous scaffolds exhibit an open and rough pore structure. The pore structure and mechanical properties of the scaffolds can be tuned readily by varying the g-HAp nanoparticle concentration and internal phase volume fraction of the emulsion templates. With increasing the g-HAp concentration or decreasing the internal phase volume fraction, the pore size and the porosity decrease, while the Young's modulus and the compressive stress enhance. Moreover, the in vitro mineralization tests show that the bioactivity of the scaffolds increases with increasing the g-HAp concentration. Furthermore, the anti-inflammatory drug ibuprofen (IBU) is loaded into the scaffolds, and the drug release studies indicate that the loaded-IBU exhibits a sustained release profile. Finally, in vitro cell culture assays prove that the scaffolds are biocompatible because of supporting adhesion, spreading, and proliferation of mouse bone mesenchymal stem cells. All the results indicate that the solvent evaporation based on Pickering HIPE templates is a promising alternative method to fabricate NC porous scaffolds for potential bone tissue engineering applications.
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Affiliation(s)
- Yang Hu
- Research Institute of Materials Science, South China University of Technology , Guangzhou 510640, People's Republic of China
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45
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Lai CC, Gao WT, Nguyen DH, Ma YR, Cheng NC, Wang SC, Tjiu JW, Huang CM. Toward single-mode active crystal fibers for next-generation high-power fiber devices. ACS APPLIED MATERIALS & INTERFACES 2014; 6:13928-13936. [PMID: 25077733 DOI: 10.1021/am503330m] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report what we believe to be the first demonstration of a facile approach with controlled geometry for the production of crystal-core ceramic-clad hybrid fibers for scaling fiber devices to high average powers. The process consists of dip coating a solution of polycrystalline alumina onto a high-crystallinity 40-μm-diameter Ti:sapphire single-crystalline core followed by thermal treatments. Comparison of the measured refractive index with high-resolution transmission electron microscopy reveals that a Ca/Si-rich intragranular layer is precipitated at grain boundaries by impurity segregation and liquid-phase formation due to the relief of misfit strain energy in the Al2O3 matrix, slightly perturbing the refractive index and hence the optical properties. Additionally, electron backscatter diffractions supply further evidence that the Ti:sapphire single-crystalline core provides the template for growth into a sacrificial polycrystalline cladding, bringing the core and cladding into a direct bond. The thus-prepared doped crystal core with the undoped crystal cladding was achieved through the abnormal grain-growth process. The presented results provide a general guideline both for controlling crystal growth and for the performance of hybrid materials and provides insights into how one might design single-mode high-power crystal fiber devices.
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Affiliation(s)
- Chien-Chih Lai
- Department of Physics, National Dong Hwa University , Hualien 97401, Taiwan
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46
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Effect of bioactive extruded PLA/HA composite films on focal adhesion formation of preosteoblastic cells. Colloids Surf B Biointerfaces 2014; 121:409-16. [PMID: 24986753 DOI: 10.1016/j.colsurfb.2014.06.029] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Revised: 06/10/2014] [Accepted: 06/11/2014] [Indexed: 11/23/2022]
Abstract
The quality of the initial cell attachment to a biomaterial will influence any further cell function, including spreading, proliferation, differentiation and viability. Cell attachment is influenced by the material's ability to adsorb proteins, which is related to the surface chemistry and topography of the material. In this study, we incorporated hydroxyapatite (HA) particles into a poly(lactic acid) (PLA) composite and evaluated the surface structure and the effects of HA density on the initial cell attachment in vitro of murine calvarial preosteoblasts (MC3T3-EI). Scanning electron microscopy (SEM), atomic force microscopy (AFM) and infrared spectroscopy (FTIR) showed that the HA particles were successfully incorporated into the PLA matrix and located at the surface which is of importance in order to maintain the bioactive effect of the HA particles. SEM and AFM investigation revealed that the HA density (particles/area) as well as surface roughness increased with HA loading concentration (i.e. 5, 10, 15 and 20wt%), which promoted protein adsorption. Furthermore, the presence of HA on the surface enhanced cell spreading, increased the formation of actin stress fibers and significantly improved the expression of vinculin in MC3T3-E1 cells which is a key player in the regulation of cell adhesion. These results suggest the potential utility of PLA/HA composites as biomaterials for use as a bone substitute material and in tissue engineering applications.
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47
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Effects of Inorganic Fillers on the Thermal and Mechanical Properties of Poly(lactic acid). INT J POLYM SCI 2014; 2014. [PMID: 25717339 DOI: 10.1155/2014/827028] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Addition of filler to polylactic acid (PLA) may affect its crystallization behavior and mechanical properties. The effects of talc and hydroxyapatite (HA) on the thermal and mechanical properties of two types of PLA (one amorphous and one semicrystalline) have been investigated. The composites were prepared by melt blending followed by injection molding. The molecular weight, morphology, mechanical properties, and thermal properties have been characterized by gel permeation chromatography (GPC), scanning electron microscope (SEM), instron tensile tester, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and dynamic mechanical analysis (DMA). It was found that the melting blending led to homogeneous distribution of the inorganic filler within the PLA matrix but decreased the molecular weight of PLA. Regarding the filler, addition of talc increased the crystallinity of PLA, but HA decreased the crystallinity of PLA. The tensile strength of the composites depended on the crystallinity of PLA and the interfacial properties between PLA and the filler, but both talc and HA filler increased the toughness of PLA.
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48
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Zhou L, Tan G, Tan Y, Wang H, Liao J, Ning C. Biomimetic mineralization of anionic gelatin hydrogels: effect of degree of methacrylation. RSC Adv 2014. [DOI: 10.1039/c4ra02271h] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The crosslinker contents of the hydrogel have a significant effect on the mineralization outcome, including crystallinity, content, and morphology of the mineral growth within the 3d gelatin methacrylate scaffold.
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Affiliation(s)
- Lei Zhou
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou, China
| | - Guoxin Tan
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou, China
| | - Ying Tan
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou, China
| | - Hang Wang
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou, China
| | - Jingwen Liao
- College of Materials Science and Technology
- South China University of Technology
- Guangzhou, China
| | - Chengyun Ning
- College of Materials Science and Technology
- South China University of Technology
- Guangzhou, China
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49
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