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Aarsen C, Liguori A, Mattsson R, Sipponen MH, Hakkarainen M. Designed to Degrade: Tailoring Polyesters for Circularity. Chem Rev 2024; 124:8473-8515. [PMID: 38936815 PMCID: PMC11240263 DOI: 10.1021/acs.chemrev.4c00032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Revised: 04/30/2024] [Accepted: 06/11/2024] [Indexed: 06/29/2024]
Abstract
A powerful toolbox is needed to turn the linear plastic economy into circular. Development of materials designed for mechanical recycling, chemical recycling, and/or biodegradation in targeted end-of-life environment are all necessary puzzle pieces in this process. Polyesters, with reversible ester bonds, are already forerunners in plastic circularity: poly(ethylene terephthalate) (PET) is the most recycled plastic material suitable for mechanical and chemical recycling, while common aliphatic polyesters are biodegradable under favorable conditions, such as industrial compost. However, this circular design needs to be further tailored for different end-of-life options to enable chemical recycling under greener conditions and/or rapid enough biodegradation even under less favorable environmental conditions. Here, we discuss molecular design of the polyester chain targeting enhancement of circularity by incorporation of more easily hydrolyzable ester bonds, additional dynamic bonds, or degradation catalyzing functional groups as part of the polyester chain. The utilization of polyester circularity to design replacement materials for current volume plastics is also reviewed as well as embedment of green catalysts, such as enzymes in biodegradable polyester matrices to facilitate the degradation process.
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Affiliation(s)
- Celine
V. Aarsen
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 58, 100 44 Stockholm, Sweden
| | - Anna Liguori
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 58, 100 44 Stockholm, Sweden
- Department
of Chemistry “G. Ciamician”, University of Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Rebecca Mattsson
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 58, 100 44 Stockholm, Sweden
| | - Mika H. Sipponen
- Department
of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, 106
91 Stockholm, Sweden
| | - Minna Hakkarainen
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 58, 100 44 Stockholm, Sweden
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2
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Lee MY, Yoon HW, Lee SY, Kim KM, Shin SJ, Kwon JS. Mineral trioxide aggregate in membrane form as a barrier membrane in guided bone regeneration. J Dent Sci 2024; 19:1653-1666. [PMID: 39035317 PMCID: PMC11259731 DOI: 10.1016/j.jds.2023.11.021] [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: 10/24/2023] [Revised: 11/27/2023] [Indexed: 07/23/2024] Open
Abstract
Background/purpose In the field of conservative dentistry and endodontics, mineral trioxide aggregate (MTA), commonly used, possesses advantages such as biocompatibility, antimicrobial properties and osteogenic potential. This study investigated the feasibility of utilizing membrane form mineral trioxide aggregate (MTA) as a barrier membrane in guided bone regeneration (GBR) procedures. Materials and methods Membranes were electrospun from three different formulations: 15 w/v% Polycaprolactone (PCL), 13 w/v% PCL + 2 w/v% MTA (2MTA), and 11 w/v% PCL + 4 w/v% MTA (4MTA). Physicochemical and mechanical properties of the electrospun membrane were compared, encompassing parameters such as surface morphology, fiber diameter distribution, chemical composition, phase identification, tensile stress, pH variation, and water contact angle. Moreover, the antimicrobial properties against of the electrospun membranes were assessed through direct exposure to streptococcus aureus (S. aureus) and candida albicans (C. albicans). Additionally, on the 7th day, biocompatibility and cell attachment were investigated with respect to L929 (fibroblast) and MC3T3 (pre-osteoblast) cells. Inhibition of L929 cell infiltration and the expression of osteogenic related genes including osteocalcin (OCN), alkaline phosphatase (ALP), and runt related transcription factor 2 (RUNX2) in MC3T3 cells on 7th and 14th days were also investigated. Results PCL, 2MTA, and 4MTA exhibited no statistically differences in fiber diameter distribution and tensile stress. However, as the MTA content increased, wettability and pH also increased. Due to the elevated pH, 4MTA demonstrated the lowest viability S.aureus and C.albicans. All membranes were highly biocompatibility and promoted cell attachment, while effectively preventing L929 cell infiltration. Lastly 4MTA showed increase in OCN, ALP, and RUNX2 expression on both 7th and 14th day. Conclusion The membrane form MTA possessed characteristics essential for a novel barrier membrane.
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Affiliation(s)
- Min-Yong Lee
- Department and Research Institute of Dental Biomaterials and Bioengineering, Yonsei University College of Dentistry, Seoul, South Korea
| | - Hi-Won Yoon
- Department of Conservative Dentistry, Gangnam Severance Hospital, Yonsei University College of Dentistry, Seoul, South Korea
| | - Si-Yoon Lee
- Department of Biology, New York University, New York, NY, USA
| | - Kwang-Mahn Kim
- Department and Research Institute of Dental Biomaterials and Bioengineering, Yonsei University College of Dentistry, Seoul, South Korea
| | - Su-Jung Shin
- Department of Conservative Dentistry, Gangnam Severance Hospital, Yonsei University College of Dentistry, Seoul, South Korea
| | - Jae-Sung Kwon
- Department and Research Institute of Dental Biomaterials and Bioengineering, Yonsei University College of Dentistry, Seoul, South Korea
- BK21 FOUR Project, Yonsei University College of Dentistry, Seoul, South Korea
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3
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Amir M, Bano N, Gupta A, Zaheer MR, Roohi. Purification and characterization of extracellular PHB depolymerase enzyme from Aeromonas caviae Kuk1-(34) and their biodegradation studies with polymer films. Biodegradation 2024; 35:137-153. [PMID: 37639167 DOI: 10.1007/s10532-023-10051-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 08/15/2023] [Indexed: 08/29/2023]
Abstract
PHB depolymerase enzymes are able to breakdown the PHB polymers and thereby get significant economic value in the bioplastics industry and for bioremediation as well. This study shows the purification of novel extracellular PHB depolymerase enzyme from Aeromonas caviae Kuk1-(34) using dialysis followed by gel filtration and HPLC. The purification fold and yield after HPLC were 45.92 and 27.04%, respectively. HPLC data showed a single peak with a retention time of 1.937 min. GC-MS analysis reveals the presence of three compounds, of which 1-Dodecanol was found to be most significant with 54.48% area and 8.623-min retention time (RT). The molecular weight of the purified enzyme was obtained as 35 kDa with Km and apparent Vmax values of 0.769 mg/mL and 1.89 U/mL, respectively. The enzyme was moderately active at an optimum temperature of 35 °C and at pH 8.0. The stability was detected at pH 7.0-9.0 and 35-45 °C. Complete activity loss was observed with EDTA, SDS, Tween-20 at 5 mM and with 0.1% Triton X 100. A biodegradation study of commercially available biodegradable polymer films was carried out in a liquid medium and in soil separately with pure microbial culture and with purified enzyme for 7, 14, 28, and 49 consecutive days. In a liquid medium, with a pure strain of Aeromonas caviae Kuk1-(34), the maximum degradation (89%) was achieved on the PHB film, while no changes were observed with other polymer films. With purified enzyme in the soil, 71% degradation of the PHB film was noticed, and it was only 18% in the liquid medium. All such weight analysis were confirmed by SEM images where several holes, pits, grooves, crest, and surface roughness are clearly observed. Our results demonstrated the potential utility of Aeromonas caviae Kuk1-(34) as a source of extracellular PHB depolymerase capable of degrading PHB under a wide range of natural/ lab conditions.
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Affiliation(s)
- Mohd Amir
- Protein research Laboratory, Department of Bioengineering, Integral University, Lucknow, Uttar Pradesh, 226026, India
| | - Naushin Bano
- Protein research Laboratory, Department of Bioengineering, Integral University, Lucknow, Uttar Pradesh, 226026, India
| | - Anamika Gupta
- Department of Chemistry, Aligarh Muslim University, Aligarh, UP, India
| | - Mohd Rehan Zaheer
- Department of Chemistry, R.M.P.S.P. Girls Post Graduate College, Basti, Uttar Pradesh, 272301, India
| | - Roohi
- Protein research Laboratory, Department of Bioengineering, Integral University, Lucknow, Uttar Pradesh, 226026, India.
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4
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Zhou Q, Zhang J, Fang Q, Zhang M, Wang X, Zhang D, Pan X. Microplastic biodegradability dependent responses of plastisphere antibiotic resistance to simulated freshwater-seawater shift in onshore marine aquaculture zones. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 331:121828. [PMID: 37187278 DOI: 10.1016/j.envpol.2023.121828] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 05/09/2023] [Accepted: 05/13/2023] [Indexed: 05/17/2023]
Abstract
MPs carrying ARGs can travel between freshwater and seawater due to intensive land-sea interaction in onshore marine aquaculture zones (OMAZ). However, the response of ARGs in plastisphere with different biodegradability to freshwater-seawater shift is still unknown. In this study, ARG dynamics and associated microbiota on biodegradable poly (butyleneadipate-co-terephthalate) (PBAT) and non-biodegradable polyethylene terephthalate (PET) MPs were investigated through a simulated freshwater-seawater shift. The results exhibited that freshwater-seawater shift significantly influenced ARG abundance in plastisphere. The relative abundance of most studied ARGs decreased rapidly in plastisphere after they entered seawater from freshwater but increased on PBAT after MPs entered freshwater from seawater. Besides, the high relative abundance of multi-drug resistance (MDR) genes occurred in plastisphere, and the co-change between most ARGs and mobile genetic elements indicated the role of horizontal gene transfer on ARG regulation. Proteobacteria was dominant phylum in plastisphere and the dominant genera, such as Allorhizobium-Neorhizobium-Pararhizobium-Rhizobium, Afipia, Gemmobacter and Enhydrobacter, were significantly associated with qnrS, tet and MDR genes in plastisphere. Moreover, after MPs entered new water environment, the ARGs and microbiota genera in plastisphere changed significantly and tended to converge with those in receiving water. These results indicated that MP biodegradability and freshwater-seawater interaction influenced potential hosts and distributions of ARGs, of which biodegradable PBAT posed a high risk in ARG dissemination. This study would be helpful for understanding the impact of biodegradable MP pollution on spread of antibiotic resistance in OMAZ.
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Affiliation(s)
- Qian Zhou
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Jun Zhang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Qunkai Fang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Ming Zhang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Xiaonan Wang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Daoyong Zhang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China.
| | - Xiangliang Pan
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
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5
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Zaborowska M, Bernat K, Pszczółkowski B, Cydzik-Kwiatkowska A, Kulikowska D, Wojnowska-Baryła I. Multi-faceted analysis of thermophilic anaerobic biodegradation of poly(lactic acid)-based material. WASTE MANAGEMENT (NEW YORK, N.Y.) 2023; 155:40-52. [PMID: 36343599 DOI: 10.1016/j.wasman.2022.10.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 10/13/2022] [Accepted: 10/26/2022] [Indexed: 06/16/2023]
Abstract
Currently, the production of bio-based polymeric materials, of which poly(lactic acid) (PLA) is the most popular, has been increasing, causing the growth of PLA waste in municipal waste. Thus, it is necessary to develop sustainable methods for treating it. Methane production, resulting from anaerobic digestion (AD), is a potential end-of-life scenario for PLA waste that needs to be investigated. To obtain high efficiency of AD, thermophilic fermentation was applied, and to overcome low rates of biodegradation, hydrothermal (HT) and alkaline (A) pretreatments were used. For a deep insight into the process, differential scanning calorimetry (DSC), Fourier-transform infrared spectroscopy (FTIR), and microscopic and microbial analyses (based on 16S rDNA) were applied. For both untreated (PLA) and pretreated (PLAHT, PLAA) samples a high maximal methane production (MP) of 453 L/kg volatile solids (VS) was obtained, almost 100 % of the theoretical methane yield from PLA. The use of pretreatment allowed shortening of the time for obtaining maximal MP, especially the hydrothermal pretreatment, which shortened the overall time of MP 1.3-fold, and methane was produced at an almost 10 % higher rate (8.35 vs 7.79 L/(kg VS·d)). However, DSC and microscopic analyses revealed that, in all cases, methane was intensively produced i) after the reduction of the molecular mass of the PLA material and ii) also when PLA pieces were not visible. This should be considered when designing the operational time for the AD process. Parallel to the gradual biodegradation of PLA, the abundances of Firmicutes, Thermotogae, and Euryarcheota increased. With PLAHT, Syntrophobacteraceae, Thermoanaerobacteraceae, and methanogens were identified as potential key thermophilic PLA biodegraders.
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Affiliation(s)
- Magdalena Zaborowska
- Department of Environmental Biotechnology, Faculty of Environmental Sciences, University of Warmia and Mazury in Olsztyn, Słoneczna Str. 45G, Olsztyn, Poland.
| | - Katarzyna Bernat
- Department of Environmental Biotechnology, Faculty of Environmental Sciences, University of Warmia and Mazury in Olsztyn, Słoneczna Str. 45G, Olsztyn, Poland
| | - Bartosz Pszczółkowski
- Department of Materials and Machines Technology, Faculty of Technical Sciences, University of Warmia and Mazury in Olsztyn, Oczapowskiego Str. 11, Olsztyn, Poland
| | - Agnieszka Cydzik-Kwiatkowska
- Department of Environmental Biotechnology, Faculty of Environmental Sciences, University of Warmia and Mazury in Olsztyn, Słoneczna Str. 45G, Olsztyn, Poland
| | - Dorota Kulikowska
- Department of Environmental Biotechnology, Faculty of Environmental Sciences, University of Warmia and Mazury in Olsztyn, Słoneczna Str. 45G, Olsztyn, Poland
| | - Irena Wojnowska-Baryła
- Department of Environmental Biotechnology, Faculty of Environmental Sciences, University of Warmia and Mazury in Olsztyn, Słoneczna Str. 45G, Olsztyn, Poland
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6
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Mouhoubi R, Lasschuijt M, Ramon Carrasco S, Gojzewski H, Wurm FR. End-of-life biodegradation? how to assess the composting of polyesters in the lab and the field. WASTE MANAGEMENT (NEW YORK, N.Y.) 2022; 154:36-48. [PMID: 36209717 DOI: 10.1016/j.wasman.2022.09.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 09/20/2022] [Accepted: 09/23/2022] [Indexed: 06/16/2023]
Abstract
The aerobic composting of biodegradable plastics can be a promising solution to the growing issue of waste accumulation. Therefore, this article offers a review of papers investigating the biodegradability of polyesters (PLA, PHB, PBS and PCL) in home- and industrial composting. Not only the thermal and biodegradation properties are discussed, but also a comparison is made between the different polyesters under the same composting conditions. From this review, it becomes clear that composting shows promise for polyester waste management. However, although several methods for assessing the composting properties of polyester have been developed, the fact that they rarely follow the same standards does not allow for a comparative analysis that would clearly define composting as the most viable solution.
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Affiliation(s)
- Rakine Mouhoubi
- Sustainable Polymer Chemistry Group, MESA+ Institute for Nanotechnology, Faculty of Science and Technology, Universiteit Twente, PO Box 217, 7500 AE Enschede, the Netherlands
| | - Merel Lasschuijt
- Sustainable Polymer Chemistry Group, MESA+ Institute for Nanotechnology, Faculty of Science and Technology, Universiteit Twente, PO Box 217, 7500 AE Enschede, the Netherlands
| | - Salma Ramon Carrasco
- Sustainable Polymer Chemistry Group, MESA+ Institute for Nanotechnology, Faculty of Science and Technology, Universiteit Twente, PO Box 217, 7500 AE Enschede, the Netherlands
| | - Hubert Gojzewski
- Sustainable Polymer Chemistry Group, MESA+ Institute for Nanotechnology, Faculty of Science and Technology, Universiteit Twente, PO Box 217, 7500 AE Enschede, the Netherlands
| | - Frederik R Wurm
- Sustainable Polymer Chemistry Group, MESA+ Institute for Nanotechnology, Faculty of Science and Technology, Universiteit Twente, PO Box 217, 7500 AE Enschede, the Netherlands.
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7
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Degradation kinetics and performances of poly(lactic acid) films in artificial seawater. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02286-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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8
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Kost B, Basko M, Bednarek M, Socka M, Kopka B, Łapienis G, Biela T, Kubisa P, Brzeziński M. The influence of the functional end groups on the properties of polylactide-based materials. Prog Polym Sci 2022. [DOI: 10.1016/j.progpolymsci.2022.101556] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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9
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Paxton NC, Ho SWK, Tuten BT, Lipton-Duffin J, Woodruff MA. Degradation of Melt Electrowritten PCL Scaffolds Following Melt Processing and Plasma Surface Treatment. Macromol Rapid Commun 2021; 42:e2100433. [PMID: 34668263 DOI: 10.1002/marc.202100433] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 10/11/2021] [Indexed: 12/12/2022]
Abstract
Melt electrowriting (MEW) has been widely used to process polycaprolactone (PCL) into highly ordered microfiber scaffolds with controllable architecture and geometry. However, the integrity of PCL during specific processes involved in routine MEW scaffold development has not yet been thoroughly investigated. This study investigates the impact of MEW processing on PCL following exposure to high temperatures required for melt extrusion as well as atmospheric plasma, a widely used surface treatment for improving MEW scaffold hydrophilicity. The change in polymer molecular weight and melt temperature is characterized, in comparing unprocessed and processed samples, in addition to analysis of the mechanical and surface properties of the scaffolds. No significant difference in the molecular weight or mechanical properties of the PCL scaffolds is evident following 5 days of cyclic heating to 90 °C. Exposure to plasma for up to 5 min significantly increased hydrophilicity and surface adhesion force, characterized via contact angle and atomic force microscope, however, significant polymer degradation occurred evidenced by increased brittleness of the scaffolds. This study demonstrates the degradation of PCL following fabrication via MEW and surface treatment to guide the optimization of scaffold development for subsequent applications in tissue engineering and biofabrication.
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Affiliation(s)
- Naomi C Paxton
- Queensland University of Technology (QUT), 2 George St, Brisbane, Queensland, 4059, Australia.,School of Mechanical, Medical & Process Engineering, Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, Queensland, 4000, Australia
| | - Selina W K Ho
- Queensland University of Technology (QUT), 2 George St, Brisbane, Queensland, 4059, Australia.,School of Mechanical, Medical & Process Engineering, Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, Queensland, 4000, Australia
| | - Bryan T Tuten
- Queensland University of Technology (QUT), 2 George St, Brisbane, Queensland, 4059, Australia.,School of Chemistry and Physics, Centre for Materials Science, Queensland University of Technology (QUT), Brisbane, Queensland, 4000, Australia
| | - Josh Lipton-Duffin
- Queensland University of Technology (QUT), 2 George St, Brisbane, Queensland, 4059, Australia.,Central Analytical Research Facility, Centre for Materials Science, Queensland University of Technology (QUT), Brisbane, Queensland, 4000, Australia
| | - Maria A Woodruff
- Queensland University of Technology (QUT), 2 George St, Brisbane, Queensland, 4059, Australia.,School of Mechanical, Medical & Process Engineering, Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, Queensland, 4000, Australia
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10
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Degradable Elastomers: Is There a Future in Tyre Compound Formulation? Molecules 2021; 26:molecules26154454. [PMID: 34361606 PMCID: PMC8347236 DOI: 10.3390/molecules26154454] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 07/14/2021] [Accepted: 07/19/2021] [Indexed: 11/16/2022] Open
Abstract
Problems related to non-biodegradable waste coming from vulcanized rubber represent one of the pre-eminent challenges for modern society. End-of-life tyres are an important source of this typology of waste and the increasingly high accumulation in the environment has contributed over the years to enhance land and water pollution. Moreover, the release into the environment of non-degradable micro-plastics and other chemicals as an effect of tyre abrasion is not negligible. Many solutions are currently applied to reuse end-of-life tyres as a raw material resource, such as pyrolysis, thermo-mechanical or chemical de-vulcanisation, and finally crumbing trough different technologies. An interesting approach to reduce the environmental impact of vulcanised rubber wastes is represented by the use of degradable thermoplastic elastomers (TPEs) in tyre compounds. In this thematic review, after a reviewing fossil fuel-based TPEs, an overview of the promising use of degradable TPEs in compound formulation for the tyre industry is presented. Specifically, after describing the properties of degradable elastomers that are favourable for tyres application in comparison to used ones, the real scenario and future perspectives related to the use of degradable polymers for new tyre compounds will be realized.
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11
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Sun H, Yan L, Zhang R, Lovell JF, Wu Y, Cheng C. A sulfobetaine zwitterionic polymer-drug conjugate for multivalent paclitaxel and gemcitabine co-delivery. Biomater Sci 2021; 9:5000-5010. [PMID: 34105535 PMCID: PMC8277739 DOI: 10.1039/d1bm00393c] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A zwitterionic polymer-drug conjugate (ZPDC) strategy is developed for the co-delivery of paclitaxel (PTX) and gemcitabine (GEM) chemotherapeutics, as well as a near-infrared fluorescence imaging agent cyanine5.5 (Cy5.5). The well-defined ZPDC is synthesized by tandem azide-alkyne and thiol-ene click functionalization of a biodegradable acetylenyl/allyl-functionalized polylactide and zwitterionic character is conferred by sulfobetaine. It has a number-average molecular weight of 53.6 kDa, comprising 6.5% PTX and 17.7% GEM by weight. Cy5.5 moieties are readily introduced to the ZPDC via conjugation. In aqueous solutions, the ZPDC exhibits a hydrodynamic diameter of 46 nm. In vitro MIA PaCa-2 human pancreatic cancer cells show strong ZPDC cellular uptake and cytotoxicity. In mice, the ZPDC exhibits long blood circulation, effective tumor accumulation, biocompatibility, therapeutic effect, and integrated imaging capacity. Overall, this work illustrates that ZPDCs are promising systems for chemotherapy delivery and bioimaging applications.
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Affiliation(s)
- Haotian Sun
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA.
| | - Lingyue Yan
- Department of Biomedical Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA.
| | - Runsheng Zhang
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA.
| | - Jonathan F Lovell
- Department of Biomedical Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA.
| | - Yun Wu
- Department of Biomedical Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA.
| | - Chong Cheng
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA.
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12
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Mbarki K, Fersi M, Louati I, Elleuch B, Sayari A. Biodegradation study of PDLA/cellulose microfibres biocomposites by Pseudomonas aeruginosa. ENVIRONMENTAL TECHNOLOGY 2021; 42:731-742. [PMID: 31304884 DOI: 10.1080/09593330.2019.1643926] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 07/09/2019] [Indexed: 06/10/2023]
Abstract
Aerobic biodegradation of biocomposites has been studied in both solid and liquid media. The research was concentrated on the biodegradation under aerobic and mesophilic conditions using poly-d-lactic acid (PDLA) and PDLA/cellulose microfibres (CMFs) samples as the sole carbon source. To determine the efficiency of the biodegradation, quantitative (mass variations, optical density (OD)) and qualitative (FTIR, NMR and SEM) analyses have been used to follow the polymer changes after degradation. The weight loss and OD of the biocomposites samples PDLA/CMFs were slower than that of pristine PDLA. The PDLA displayed the most important loss of weight (7.09%, 8.95%) compared to its initial weight and the lowest weight loss was detected in PDLA/CMF300 (1.04%, 2.19%) in solid and liquid mediums respectively. Also, the OD value of PDLA was increased from the seven days (0.381) to the last day (0.969). It appears that the major rate-determining factor affecting material degradation was its crystallinity without or with minimal assistance from abiotic factor because crystalline phases inhibit the diffusion of small water molecules. Otherwise, the Pseudomonas aeruginosa was isolated from Mediterranean soil has been found to be a novel candidate to biodegrade PDLA under mesophilic conditions.
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Affiliation(s)
- Khadija Mbarki
- Laboratory of Environmental Engineering and EcoTechnology (LGEET), National School of Engineering of Sfax (ENIS), Sfax University, Sfax, Tunisia
| | - Mariem Fersi
- Unité de Biotechnologie des Algues, National School of Engineers of Sfax, Sfax University, Sfax, Tunisia
| | - Ibtihel Louati
- Laboratory of Enzyme Engineering and Microbiology, National School of Engineers of Sfax, Sfax University, Sfax, Tunisia
| | - Boubaker Elleuch
- Laboratory of Environmental Engineering and EcoTechnology (LGEET), National School of Engineering of Sfax (ENIS), Sfax University, Sfax, Tunisia
| | - Adel Sayari
- Laboratory of Biochemistry and Enzymatic Engineering of Lipases, National School of Engineering of Sfax (ENIS), Sfax University, Sfax, Tunisia
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13
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Zhang Y, He J, Chen H, Xiong C. A new hydrophilic biodegradable ureteral stent restrain encrustation both in vitro and in vivo. J Biomater Appl 2021; 35:720-731. [PMID: 32799701 DOI: 10.1177/0885328220949376] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Ureteral stents have been widely used as biomedical devices to treat some urological diseases for several decades. However, the encrustation complications hamper the long-time clinical use of the ureteral stents. In this work, a new type of biodegradable material for the ureteral stents, methoxypoly(ethylene glycol)-block-poly(L-lactide-ran-Ɛ-caprolactone) (mPEG-PLACL), is evaluated to overcome this problem. The results show that the hydrophilicity and degradation rate in artificial urine of mPEG-PLACL are both significantly increased. It is worth noting that the mPEG-PLACL shows a lower amount of encrustation after immersing the stents in the dynamic urinary extracorporeal circulation (DUEC) model for 7 days. In addition, 71% Ca and 92% Mg are inhibited in vivo by quantitative analysis. Pathological analysis exhibit that the mPEG-PLACL cause less diffuse mucosal hyperplasia after 7 weeks of implantation. All the results indicate that this new type of biodegradable material had an excellent potential for the ureteral stents in the future.
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Affiliation(s)
- Yu Zhang
- 26444Chengdu Institute of Organic Chemistry CAS, Chengdu, China
| | - Jian He
- 26444Chengdu Institute of Organic Chemistry CAS, Chengdu, China
| | - Hechun Chen
- 26444Chengdu Institute of Organic Chemistry CAS, Chengdu, China
| | - Chengdong Xiong
- 26444Chengdu Institute of Organic Chemistry CAS, Chengdu, China
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14
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Echeverri DA, Pérez WA, Inciarte HC, Rios LA. Accelerated weathering behavior of castor oil bio‐based thermosets. J Appl Polym Sci 2020. [DOI: 10.1002/app.49509] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- David A. Echeverri
- Grupo Procesos Químicos IndustrialesUniversidad de Antioquia UdeA Medellín Colombia
| | - William A. Pérez
- Grupo Procesos Químicos IndustrialesUniversidad de Antioquia UdeA Medellín Colombia
| | - Helen C. Inciarte
- Grupo Procesos Químicos IndustrialesUniversidad de Antioquia UdeA Medellín Colombia
| | - Luis A. Rios
- Grupo Procesos Químicos IndustrialesUniversidad de Antioquia UdeA Medellín Colombia
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15
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Hydrolytic Degradation of Porous Crosslinked Poly(ε-Caprolactone) Synthesized by High Internal Phase Emulsion Templating. Polymers (Basel) 2020; 12:polym12081849. [PMID: 32824691 PMCID: PMC7464575 DOI: 10.3390/polym12081849] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 08/06/2020] [Accepted: 08/14/2020] [Indexed: 11/18/2022] Open
Abstract
Porous poly(ε-caprolactone) (PCL) scaffolds were fabricated using the high internal polymerization emulsion (HIPE) technique. Bis(ε-caprolactone-4-yl) (BCY) was utilized as crosslinker. The crosslinking density and the volume fraction of the dispersed phase were varied in order to study the potential effect of these parameters on the hydrolytic degradation at 37 °C and 60 °C. After different hydrolysis times the remaining solid samples were analyzed by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM), while the degradation products in the aqueous aging solutions were analyzed by laser desorption ionization-mass spectrometry (LDI-MS). The effect of temperature on the degradation process and release of degradation products was, as expected, significant. The temperature effect was also shown by FTIR analysis that displayed a pronounced increase in the intensity of the hydroxyl-group absorption band after 70 days of hydrolysis at 60 °C indicating significant cleavage of the polymer chains. LDI-MS analysis proved the release of oligomers ranging from dimers to hexamers. The product patterns were similar, but the relative m/z signal intensities increased with increasing time, temperature and crosslinking density, indicating larger amounts of released products. The latter is probably due to the decreasing degree of crystallinity as a function of amount of crosslinker. The porous structure and morphology of the scaffolds were lost during the aging. The higher the crosslinking density, the longer the scaffolds retained their original porous structure and morphology.
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16
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Louisy E, Fontaine G, Gaucher V, Bonnet F, Stoclet G. Comparative studies of thermal and mechanical properties of macrocyclic versus linear polylactide. Polym Bull (Berl) 2020. [DOI: 10.1007/s00289-020-03290-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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17
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Zamanifard M, Khorasani MT, Daliri M, Parvazinia M. Preparation and modeling of electrospun polyhydroxybutyrate/polyaniline composite scaffold modified by plasma and printed by an inkjet method and its cellular study. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2020; 31:1515-1537. [PMID: 32403986 DOI: 10.1080/09205063.2020.1764162] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The reconstruction of the nerve tissue engineering scaffold is always of particular interest due to the inability to recover and repair neural tissues after being damaged by diseases or physical injuries. The primary purpose of this study was obtaining a model used to predict the diameter of the fibers of electrospun polyhydroxybutyrate (PHB) scaffolds. Accordingly, the range of operating parameters, namely the applied voltage, the distance between the nozzle to the collector, and solution concentration, was designed for the electrospinning process at three different levels, giving seventeen experiments. These data were modeled utilizing response surface methodology and artificial neural network method using Design Expert and Matlab software.The effect of process parameters on the diameter, as well as their interactions were investigated in detail, and the corresponding models were suggested. Both the RSM and ANN models showed an excellent agreement between the experimental and predicted response values. In the second phase of the study, PHB natural polymer was electrospun into scaffolds with high biocompatibility, resulting in a 224-360 nm diameter range .To further modify the scaffold in order to improve the compatibility of PHB, the fibrous surface of scaffolds was exposed to oxygenated plasma gas radiation under controlled conditions. Next, polyaniline (PANI) nanoparticles were then synthesized and printed on the surface of scaffolds as parallel lines. Then samples were exposed to the electric field. Fourier-transform infrared spectroscopy, water contact angle, optical and electron microscopy, tensile test, and cell viability analysis were performed to study properties of resulting scaffolds. The results indicated the fact that modification of the scaffolds by oxygen plasma and printing PANI nanoparticles in particular patterns had a favorable impact on cell adhesion and direction of cell growth, showing the potential of resulting scaffolds for nerve tissue engineering applications.
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Affiliation(s)
- Mohammad Zamanifard
- Department of Biomaterials, Faculty of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | | | - Morteza Daliri
- Department of Animal and Marine Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Mahmoud Parvazinia
- Department of Polymerization Engineering, Iran Polymer and Petrochemical Institute, Tehran, Iran
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18
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Gai S, Xu J, Zhang H, Yin R, Zhang W. Effects of Nanofillers on the Hydrolytic Degradation of Polyesters. TISSUE ENGINEERING PART B-REVIEWS 2020; 26:484-495. [PMID: 32138620 DOI: 10.1089/ten.teb.2019.0260] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Biopolymer matrices reinforced with nanoparticles or nanofillers have received a great deal of attention over the past decades due to their various roles such as the augmentation of thermal, electrical, mechanical, and surface properties in tissue engineering, drug delivery, and implantation. Understanding the degradation kinetics of these polyesters is very important to successful applications of them. Hydrolysis is a widely agreed mechanism for the polyester degradation. According to this mechanism, hydrolytic degradation of these polyesters can be affected by the autocatalytic action of carboxyl groups as well as other factors such as hydrophilicity, crystallinity, and glass transition temperature. In this article, the effects of nanofillers on the autocatalytic action of carboxyl groups and the foregoing factors are examined. A particular attention is paid to carbon nanotubes (CNTs), which are a favorite candidate in a wide range of applications due to their unique thermal and electrical properties. Contradictory degradation results with CNTs are reported and analyzed. Finally, a future research perspective on these polyesters is discussed. Impact statement Nanoparticles have attracted a great deal of attention over the past decades due to their various roles, such as the augmentation of thermal, electrical, mechanical, and surface properties in tissue engineering, drug delivery, and implantation. In this article, the effects of nanoparticles or nanofillers* on the degradation behavior of the polyester matrices (tissue scaffolds, drug delivery devices) are examined with a focus on the autocatalytic action of carboxyl groups, and the factors such as hydrophilicity, crystallinity, and glass transition temperature. Among many nanofillers, carbon nanotubes (CNTs), which are a favorite candidate in a wide range of applications, are found to produce some contradictory results on the degradation of the polyester matrix with CNTs incorporated, and the underlying reason for this finding is discussed for the first time in this article.
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Affiliation(s)
- Saiyou Gai
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, China
| | - Jiajia Xu
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, China
| | - Hongbo Zhang
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, China
| | - Ruixue Yin
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, China
| | - Wenjun Zhang
- School of Mechatronics and Automation, Shanghai University, Shanghai, China.,College of Engineering, The University of Saskatchewan, Saskatoon, Canada
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Gabirondo E, Sangroniz A, Etxeberria A, Torres-Giner S, Sardon H. Poly(hydroxy acids) derived from the self-condensation of hydroxy acids: from polymerization to end-of-life options. Polym Chem 2020. [DOI: 10.1039/d0py00088d] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Poly(hydroxy acids) derived from the self-condensation of hydroxy acid are biodegradable and can be fully recycled in a Circular Economy approach.
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Affiliation(s)
- Elena Gabirondo
- Department of Polymer Science and Technology
- Institute for Polymer Materials (POLYMAT)
- Faculty of Chemistry
- University of the Basque Country (UPV/EHU)
- 20018 Donostia
| | - Ainara Sangroniz
- Department of Polymer Science and Technology
- Institute for Polymer Materials (POLYMAT)
- Faculty of Chemistry
- University of the Basque Country (UPV/EHU)
- 20018 Donostia
| | - Agustin Etxeberria
- Department of Polymer Science and Technology
- Institute for Polymer Materials (POLYMAT)
- Faculty of Chemistry
- University of the Basque Country (UPV/EHU)
- 20018 Donostia
| | - Sergio Torres-Giner
- Novel Materials and Nanotechnology Group
- Institute of Agrochemistry and Food Technology (IATA)
- Spanish National Research Council (CSIC)
- 46980 Paterna
- Spain
| | - Haritz Sardon
- Department of Polymer Science and Technology
- Institute for Polymer Materials (POLYMAT)
- Faculty of Chemistry
- University of the Basque Country (UPV/EHU)
- 20018 Donostia
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20
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Synthesis Strategies for Biomedical Grade Polymers. MATERIALS HORIZONS: FROM NATURE TO NANOMATERIALS 2020. [DOI: 10.1007/978-981-15-1251-3_1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
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21
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Larrañaga A, Lizundia E. A review on the thermomechanical properties and biodegradation behaviour of polyesters. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.109296] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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22
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Hatti-Kaul R, Nilsson LJ, Zhang B, Rehnberg N, Lundmark S. Designing Biobased Recyclable Polymers for Plastics. Trends Biotechnol 2019; 38:50-67. [PMID: 31151764 DOI: 10.1016/j.tibtech.2019.04.011] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 04/20/2019] [Accepted: 04/23/2019] [Indexed: 11/30/2022]
Abstract
Several concurrent developments are shaping the future of plastics. A transition to a sustainable plastics system requires not only a shift to fossil-free feedstock and energy to produce the carbon-neutral building blocks for polymers used in plastics, but also a rational design of the polymers with both desired material properties for functionality and features facilitating their recyclability. Biotechnology has an important role in producing polymer building blocks from renewable feedstocks, and also shows potential for recycling of polymers. Here, we present strategies for improving the performance and recyclability of the polymers, for enhancing degradability to monomers, and for improving chemical recyclability by designing polymers with different chemical functionalities.
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Affiliation(s)
- Rajni Hatti-Kaul
- Biotechnology, Faculty of Engineering, Lund University, SE-221 00 Lund, Sweden.
| | - Lars J Nilsson
- Environmental and Energy Systems Studies, Faculty of Engineering, Lund University, SE-221 00 Lund, Sweden
| | - Baozhong Zhang
- Center for Analysis and Synthesis, Faculty of Engineering, Lund University, SE-221 00 Lund, Sweden
| | - Nicola Rehnberg
- Bona Sweden AB, Murmansgatan 130, Box 210 74, SE-200 21, Malmö, Sweden
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23
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Luo Y, Lin Z, Guo G. Biodegradation Assessment of Poly (Lactic Acid) Filled with Functionalized Titania Nanoparticles (PLA/TiO 2) under Compost Conditions. NANOSCALE RESEARCH LETTERS 2019; 14:56. [PMID: 30767099 PMCID: PMC6376044 DOI: 10.1186/s11671-019-2891-4] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 02/04/2019] [Indexed: 02/05/2023]
Abstract
This paper presents a biodegradation study conducted for 90 days under standardized controlled composting conditions of poly (lactic acid) (PLA) filled with functionalized anatase-titania nanofiller (PLA/TiO2 nanocomposites). The surface morphology, thermal properties, percentage of biodegradation, and molecular weight changes at different incubation times were evaluated via visual inspection, scanning electron microscopy (SEM), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and gel permeation chromatography (GPC) by taking degraded samples from compost at the end of target biodegradation time interval. The rapid increase of crystallinity indicated that the PLA and PLA/TiO2 nanocomposites had heterogeneous degradation mechanisms under controlled composting conditions. The biodegradation rate of PLA/TiO2 nanocomposites was higher than that of pure PLA because water molecules easily penetrated the nanocomposites. The dispersion of the nanoparticles in the PLA/TiO2 nanocomposites affected the biodegradation rate of PLA. Moreover, the biodegradation of PLA could be controlled by adding an amount of dispersed TiO2 nanofillers under controlled composting conditions.
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Affiliation(s)
- Yanbing Luo
- School of History and Culture, National Center for Experimental Archaeology Education, Sichuan University, Chengdu, 610064, China.
| | - Zicong Lin
- School of History and Culture, National Center for Experimental Archaeology Education, Sichuan University, Chengdu, 610064, China
| | - Gang Guo
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Chengdu, 610065, China.
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24
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Chemical stability, mass loss and hydrolysis mechanism of sterile and non-sterile lipid-core nanocapsules: The influence of the molar mass of the polymer wall. REACT FUNCT POLYM 2018. [DOI: 10.1016/j.reactfunctpolym.2018.09.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Gonzalez Ausejo J, Rydz J, Musioł M, Sikorska W, Janeczek H, Sobota M, Włodarczyk J, Szeluga U, Hercog A, Kowalczuk M. Three-dimensional printing of PLA and PLA/PHA dumbbell-shaped specimens of crisscross and transverse patterns as promising materials in emerging application areas: Prediction study. Polym Degrad Stab 2018. [DOI: 10.1016/j.polymdegradstab.2018.08.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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26
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Boudaoud N, Benali S, Mincheva R, Satha H, Raquez JM, Dubois P. Hydrolytic degradation of poly( l
-lactic acid)/poly(methyl methacrylate) blends. POLYM INT 2018. [DOI: 10.1002/pi.5659] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Naila Boudaoud
- Laboratory of Silicates, Polymers and Nanocomposites (LSPN), Department of Process Engineering; University of 8 Mai 1945; Guelma Algeria
| | - Samira Benali
- Department of Chemistry, Laboratory of Polymeric and Composite Materials (LPCM), Center of Innovation and Research in Materials and Polymers (CIRMAP); University of Mons; Mons Belgium
| | - Rosica Mincheva
- Department of Chemistry, Laboratory of Polymeric and Composite Materials (LPCM), Center of Innovation and Research in Materials and Polymers (CIRMAP); University of Mons; Mons Belgium
| | - Hamid Satha
- Laboratory of Silicates, Polymers and Nanocomposites (LSPN), Department of Process Engineering; University of 8 Mai 1945; Guelma Algeria
| | - Jean-Marie Raquez
- Department of Chemistry, Laboratory of Polymeric and Composite Materials (LPCM), Center of Innovation and Research in Materials and Polymers (CIRMAP); University of Mons; Mons Belgium
| | - Philippe Dubois
- Department of Chemistry, Laboratory of Polymeric and Composite Materials (LPCM), Center of Innovation and Research in Materials and Polymers (CIRMAP); University of Mons; Mons Belgium
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27
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Laycock B, Nikolić M, Colwell JM, Gauthier E, Halley P, Bottle S, George G. Lifetime prediction of biodegradable polymers. Prog Polym Sci 2017. [DOI: 10.1016/j.progpolymsci.2017.02.004] [Citation(s) in RCA: 301] [Impact Index Per Article: 43.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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28
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Karamanlioglu M, Preziosi R, Robson GD. Abiotic and biotic environmental degradation of the bioplastic polymer poly(lactic acid): A review. Polym Degrad Stab 2017. [DOI: 10.1016/j.polymdegradstab.2017.01.009] [Citation(s) in RCA: 249] [Impact Index Per Article: 35.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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29
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Peñaloza JP, Márquez-Miranda V, Cabaña-Brunod M, Reyes-Ramírez R, Llancalahuen FM, Vilos C, Maldonado-Biermann F, Velásquez LA, Fuentes JA, González-Nilo FD, Rodríguez-Díaz M, Otero C. Intracellular trafficking and cellular uptake mechanism of PHBV nanoparticles for targeted delivery in epithelial cell lines. J Nanobiotechnology 2017; 15:1. [PMID: 28049488 PMCID: PMC5210312 DOI: 10.1186/s12951-016-0241-6] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 12/09/2016] [Indexed: 12/04/2022] Open
Abstract
BACKGROUND Nanotechnology is a science that involves imaging, measurement, modeling and a manipulation of matter at the nanometric scale. One application of this technology is drug delivery systems based on nanoparticles obtained from natural or synthetic sources. An example of these systems is synthetized from poly(3-hydroxybutyrate-co-3-hydroxyvalerate), which is a biodegradable, biocompatible and a low production cost polymer. The aim of this work was to investigate the uptake mechanism of PHBV nanoparticles in two different epithelial cell lines (HeLa and SKOV-3). RESULTS As a first step, we characterized size, shape and surface charge of nanoparticles using dynamic light scattering and transmission electron microscopy. Intracellular incorporation was evaluated through flow cytometry and fluorescence microscopy using intracellular markers. We concluded that cellular uptake mechanism is carried out in a time, concentration and energy dependent way. Our results showed that nanoparticle uptake displays a cell-specific pattern, since we have observed different colocalization in two different cell lines. In HeLa (Cervical cancer cells) this process may occur via classical endocytosis pathway and some internalization via caveolin-dependent was also observed, whereas in SKOV-3 (Ovarian cancer cells) these patterns were not observed. Rearrangement of actin filaments showed differential nanoparticle internalization patterns for HeLa and SKOV-3. Additionally, final fate of nanoparticles was also determined, showing that in both cell lines, nanoparticles ended up in lysosomes but at different times, where they are finally degraded, thereby releasing their contents. CONCLUSIONS Our results, provide novel insight about PHBV nanoparticles internalization suggesting that for develop a proper drug delivery system is critical understand the uptake mechanism.
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Affiliation(s)
- Juan P. Peñaloza
- Center for Integrative Medicine and Innovative Science, Facultad de Medicina, Universidad Andrés Bello, Santiago, Chile
- Escuela de Bioquímica, Facultad de Ciencias Biológicas, Universidad Andrés Bello, Santiago, Chile
| | - Valeria Márquez-Miranda
- Center for Bioinformatics and Integrative Biology, Facultad de Ciencias Biológicas, Universidad Andrés Bello, Echaurren #183, 8370071 Santiago, Chile
| | - Mauricio Cabaña-Brunod
- Center for Integrative Medicine and Innovative Science, Facultad de Medicina, Universidad Andrés Bello, Santiago, Chile
- Escuela de Bioquímica, Facultad de Ciencias Biológicas, Universidad Andrés Bello, Santiago, Chile
| | - Rodrigo Reyes-Ramírez
- Center for Integrative Medicine and Innovative Science, Facultad de Medicina, Universidad Andrés Bello, Santiago, Chile
- Escuela de Bioquímica, Facultad de Ciencias Biológicas, Universidad Andrés Bello, Santiago, Chile
| | - Felipe M. Llancalahuen
- Center for Integrative Medicine and Innovative Science, Facultad de Medicina, Universidad Andrés Bello, Santiago, Chile
- Escuela de Bioquímica, Facultad de Ciencias Biológicas, Universidad Andrés Bello, Santiago, Chile
| | - Cristian Vilos
- Center for Integrative Medicine and Innovative Science, Facultad de Medicina, Universidad Andrés Bello, Santiago, Chile
- Center for Bioinformatics and Integrative Biology, Facultad de Ciencias Biológicas, Universidad Andrés Bello, Echaurren #183, 8370071 Santiago, Chile
| | | | - Luis A. Velásquez
- Center for Integrative Medicine and Innovative Science, Facultad de Medicina, Universidad Andrés Bello, Santiago, Chile
| | - Juan A. Fuentes
- Laboratorio de Genética y Patógenesis Bacteriana, Facultad de Ciencias Biológicas, Universidad Andrés Bello, Santiago, Chile
| | - Fernando D. González-Nilo
- Center for Bioinformatics and Integrative Biology, Facultad de Ciencias Biológicas, Universidad Andrés Bello, Echaurren #183, 8370071 Santiago, Chile
| | - Maité Rodríguez-Díaz
- Escuela de Química y Farmacia, Facultad de Medicina, Universidad Andrés Bello, Santiago, Chile
| | - Carolina Otero
- Center for Integrative Medicine and Innovative Science, Facultad de Medicina, Universidad Andrés Bello, Santiago, Chile
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30
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Hydrolysis and Biodegradation of Poly(lactic acid). SYNTHESIS, STRUCTURE AND PROPERTIES OF POLY(LACTIC ACID) 2017. [DOI: 10.1007/12_2016_12] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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31
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Babu SS, Mathew S, Kalarikkal N, Thomas S, E. K R. Antimicrobial, antibiofilm, and microbial barrier properties of poly (ε-caprolactone)/cloisite 30B thin films. 3 Biotech 2016; 6:249. [PMID: 28330321 PMCID: PMC5114210 DOI: 10.1007/s13205-016-0559-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 11/01/2016] [Indexed: 12/20/2022] Open
Abstract
Development of antibacterial and antibiofilm surfaces is in high demand. In this study, nanocomposite of Poly (ε-caprolactone)/Cloisite 30B was prepared by the solvent casting method. The membranes were characterised by SEM, AFM, and FTIR. Evaluation of water uptake, antimicrobial, antibiofilm, and microbial barrier properties demonstrated a significant antimicrobial and antibiofilm activity against MTCC strain of Staphylococcus haemolyticus and strong biofilm positive Staphylococcus epidermidis of clinical origin at low clay concentrations. These membranes acted as an excellent barrier to the penetration of microorganism. These nanocomposites can have promising applications in various fields including packaging.
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Affiliation(s)
- Snigdha Sajeendra Babu
- International and Inter University Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam, 686 560 India
| | - Shiji Mathew
- School of Biosciences, Mahatma Gandhi University, Kottayam, 686 560 India
| | - Nandakumar Kalarikkal
- International and Inter University Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam, 686 560 India
- School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam, 686 560 India
| | - Sabu Thomas
- International and Inter University Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam, 686 560 India
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam, 686 560 India
| | - Radhakrishnan E. K
- School of Biosciences, Mahatma Gandhi University, Kottayam, 686 560 India
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Ott LM, Zabel TA, Walker NK, Farris AL, Chakroff JT, Ohst DG, Johnson JK, Gehrke SH, Weatherly RA, Detamore MS. Mechanical evaluation of gradient electrospun scaffolds with 3D printed ring reinforcements for tracheal defect repair. ACTA ACUST UNITED AC 2016; 11:025020. [PMID: 27097554 DOI: 10.1088/1748-6041/11/2/025020] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Tracheal stenosis can become a fatal condition, and current treatments include augmentation of the airway with autologous tissue. A tissue-engineered approach would not require a donor source, while providing an implant that meets both surgeons' and patients' needs. A fibrous, polymeric scaffold organized in gradient bilayers of polycaprolactone (PCL) and poly-lactic-co-glycolic acid (PLGA) with 3D printed structural ring supports, inspired by the native trachea rings, could meet this need. The purpose of the current study was to characterize the tracheal scaffolds with mechanical testing models to determine the design most suitable for maintaining a patent airway. Degradation over 12 weeks revealed that scaffolds with the 3D printed rings had superior properties in tensile and radial compression, with at least a three fold improvement and 8.5-fold improvement, respectively, relative to the other scaffold groups. The ringed scaffolds produced tensile moduli, radial compressive forces, and burst pressures similar to or exceeding physiological forces and native tissue data. Scaffolds with a thicker PCL component had better suture retention and tube flattening recovery properties, with the monolayer of PCL (PCL-only group) exhibiting a 2.3-fold increase in suture retention strength (SRS). Tracheal scaffolds with ring reinforcements have improved mechanical properties, while the fibrous component increased porosity and cell infiltration potential. These scaffolds may be used to treat various trachea defects (patch or circumferential) and have the potential to be employed in other tissue engineering applications.
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Affiliation(s)
- Lindsey M Ott
- Bioengineering Program, University of Kansas, Lawrence, KS 66045, USA
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Xu H, Yang X, Xie L, Hakkarainen M. Conformational Footprint in Hydrolysis-Induced Nanofibrillation and Crystallization of Poly(lactic acid). Biomacromolecules 2016; 17:985-95. [DOI: 10.1021/acs.biomac.5b01636] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Huan Xu
- Department
of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm 100 44, Sweden
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Xi Yang
- Department
of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm 100 44, Sweden
| | - Lan Xie
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Minna Hakkarainen
- Department
of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm 100 44, Sweden
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34
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Mousa MH, Dong Y, Davies IJ. Recent advances in bionanocomposites: Preparation, properties, and applications. INT J POLYM MATER PO 2016. [DOI: 10.1080/00914037.2015.1103240] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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35
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Baidurah S, Kubo Y, Kuno M, Kodera K, Ishida Y, Yamane T, Ohtani H. Rapid and direct compositional analysis of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) in whole bacterial cells by thermally assisted hydrolysis and methylation-gas chromatography. ANAL SCI 2015; 31:79-83. [PMID: 25746804 DOI: 10.2116/analsci.31.79] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Thermally assisted hydrolysis and methylation-gas chromatography (THM-GC) in the presence of an organic alkali was applied to the direct analysis of copolymer composition for poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(3HB-co-3HV)] accumulated in whole bacterial cells. Cupriavidus necator was grown on a liquid medium with different molar ratios of valeric acid (V) to glucose (G) in order to control the compositions of P(3HB-co-3HV) produced in the cells. Trace amounts (0.03 mg) of dried Cupriavidus necator cells were directly subjected to THM-GC in the presence of tetramethylammonium hydroxide (TMAH) at 400°C. The obtained chromatograms clearly showed nine characteristic peaks, attributed to the THM products from 3HB and 3HV units in the polymer chains, without any appreciable interference by the bacterial matrix components. Based on these peak intensities, the copolymer compositions were determined rapidly without using any cumbersome sample pretreatment. Moreover, the compositions thus obtained were in good agreement with those obtained by the conventional technique.
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Affiliation(s)
- Siti Baidurah
- Department of Biological Chemistry, College of Bioscience and Biotechnology, Chubu University
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36
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Schöne AC, Falkenhagen S, Travkova O, Schulz B, Kratz K, Lendlein A. Influence of intermediate degradation products on the hydrolytic degradation of poly[(rac
-lactide)-co
-glycolide] at the air-water interface. POLYM ADVAN TECHNOL 2015. [DOI: 10.1002/pat.3701] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Anne-Christin Schöne
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies; Helmholtz-Zentrum Geesthacht; Kantstraße 55 14513 Teltow Germany
- Institute of Chemistry; University of Potsdam; Karl-Liebknecht-Straße 24-25 14469 Potsdam Germany
| | - Sandra Falkenhagen
- Institute of Chemistry; University of Potsdam; Karl-Liebknecht-Straße 24-25 14469 Potsdam Germany
| | - Oksana Travkova
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies; Helmholtz-Zentrum Geesthacht; Kantstraße 55 14513 Teltow Germany
| | - Burkhard Schulz
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies; Helmholtz-Zentrum Geesthacht; Kantstraße 55 14513 Teltow Germany
- Institute of Chemistry; University of Potsdam; Karl-Liebknecht-Straße 24-25 14469 Potsdam Germany
| | - Karl Kratz
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies; Helmholtz-Zentrum Geesthacht; Kantstraße 55 14513 Teltow Germany
| | - Andreas Lendlein
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies; Helmholtz-Zentrum Geesthacht; Kantstraße 55 14513 Teltow Germany
- Institute of Chemistry; University of Potsdam; Karl-Liebknecht-Straße 24-25 14469 Potsdam Germany
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Seitz JM, Durisin M, Goldman J, Drelich JW. Recent advances in biodegradable metals for medical sutures: a critical review. Adv Healthc Mater 2015; 4:1915-36. [PMID: 26172399 DOI: 10.1002/adhm.201500189] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 06/06/2015] [Indexed: 12/13/2022]
Abstract
Sutures that biodegrade and dissolve over a period of several weeks are in great demand to stitch wounds and surgical incisions. These new materials are receiving increased acceptance across surgical procedures whenever permanent sutures and long-term care are not needed. Unfortunately, both inflammatory responses and adverse local tissue reactions in the close-to-stitching environment are often reported for biodegradable polymeric sutures currently used by the medical community. While bioabsorbable metals are predominantly investigated and tested for vascular stent or osteosynthesis applications, they also appear to possess adequate bio-compatibility, mechanical properties, and corrosion stability to replace biodegradable polymeric sutures. In this Review, biodegradable alloys made of iron, magnesium, and zinc are critically evaluated as potential materials for the manufacturing of soft and hard tissue sutures. In the case of soft tissue closing and stitching, these metals have to compete against currently available degradable polymers. In the case of hard tissue closing and stitching, biodegradable sternal wires could replace the permanent sutures made of stainless steel or titanium alloys. This Review discusses the specific materials and degradation properties required by all suture materials, summarizes current suture testing protocols and provides a well-grounded direction for the potential future development of biodegradable metal based sutures.
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Affiliation(s)
- Jan-Marten Seitz
- Department of Biomedical Engineering; Michigan Technological University; 1400 Townsend Dr. Houghton MI 49931 USA
- Department of Materials Science and Engineering; Michigan Technological University; 1400 Townsend Dr. Houghton MI 49931 USA
| | - Martin Durisin
- Department of Otorhinolaryngology; Hannover Medical School; Carl-Neuberg-Str. 1 30625 Hannover Germany
| | - Jeremy Goldman
- Department of Biomedical Engineering; Michigan Technological University; 1400 Townsend Dr. Houghton MI 49931 USA
| | - Jaroslaw W. Drelich
- Department of Materials Science and Engineering; Michigan Technological University; 1400 Townsend Dr. Houghton MI 49931 USA
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38
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Kadokawa JI. Fabrication of nanostructured and microstructured chitin materials through gelation with suitable dispersion media. RSC Adv 2015. [DOI: 10.1039/c4ra15319g] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Regeneration from chitin gels with suitable dispersion media results in the efficient fabrication of nano- and microstructured materials.
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Affiliation(s)
- Jun-ichi Kadokawa
- Graduate School of Science and Engineering
- Kagoshima University
- Kagoshima 890-0065
- Japan
- Research Center for Environmentally Friendly Materials Engineering
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Hassanzadeh S, Khoee S, Beheshti A, Hakkarainen M. Release of quercetin from micellar nanoparticles with saturated and unsaturated core forming polyesters — A combined computational and experimental study. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 46:417-26. [DOI: 10.1016/j.msec.2014.10.059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 09/16/2014] [Accepted: 10/21/2014] [Indexed: 11/26/2022]
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40
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Zuo YF, Gu J, Qiao Z, Tan H, Cao J, Zhang Y. Effects of dry method esterification of starch on the degradation characteristics of starch/polylactic acid composites. Int J Biol Macromol 2015; 72:391-402. [DOI: 10.1016/j.ijbiomac.2014.08.038] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 08/03/2014] [Accepted: 08/09/2014] [Indexed: 10/24/2022]
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41
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Ning Z, Jiang N, Gan Z. Four-armed PCL-b-PDLA diblock copolymer: 1. Synthesis, crystallization and degradation. Polym Degrad Stab 2014. [DOI: 10.1016/j.polymdegradstab.2014.05.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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42
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Bor Y, Alin J, Hakkarainen M. Polylactide stereocomplexation leads to reduced migration during microwave heating in contact with food simulants. J FOOD ENG 2014. [DOI: 10.1016/j.jfoodeng.2014.02.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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43
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Sun H, Yu B, Han J, Kong J, Meng L, Zhu F. Microstructure, Thermal Properties and Rheological Behavior of PLA/PCL Blends for Melt-blown Nonwovens. POLYMER-KOREA 2014. [DOI: 10.7317/pk.2014.38.4.477] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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44
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Adjustable degradation properties and biocompatibility of amorphous and functional poly(ester-acrylate)-based materials. Biomacromolecules 2014; 15:2800-7. [PMID: 24915542 DOI: 10.1021/bm500689g] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Tuning the properties of materials toward a special application is crucial in the area of tissue engineering. The design of materials with predetermined degradation rates and controlled release of degradation products is therefore vital. Providing a material with various functional groups is one of the best ways to address this issue because alterations and modifications of the polymer backbone can be performed easily. Two different 2-methylene-1,3-dioxepane/glycidyl methacrylate-based (MDO/GMA) copolymers were synthesized with different feed ratios and immersed into a phosphate buffer solution at pH 7.4 and in deionized water at 37 °C for up to 133 days. After different time intervals, the molecular weight changes, mass loss, pH, and degradation products were determined. By increasing the amount of GMA functional groups in the material, the degradation rate and the amount of acidic degradation products released from the material were decreased. As a result, the composition of the copolymers greatly affected the degradation rate. A rapid release of acidic degradation products during the degradation process could be an important issue for biomedical applications because it might affect the biocompatibility of the material. The cytotoxicity of the materials was evaluated using a MTT assay. These tests indicated that none of the materials demonstrated any obvious cytotoxicity, and the materials could therefore be considered biocompatible.
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45
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Wright ZC, Frank CW. Increasing cell homogeneity of semicrystalline, biodegradable polymer foams with a narrow processing window via rapid quenching. POLYM ENG SCI 2014. [DOI: 10.1002/pen.23847] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Zachary C. Wright
- Department of Chemical Engineering; Stanford University; Stanford California
| | - Curtis W. Frank
- Department of Chemical Engineering; Stanford University; Stanford California
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46
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47
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Karamanlioglu M, Robson GD. The influence of biotic and abiotic factors on the rate of degradation of poly(lactic) acid (PLA) coupons buried in compost and soil. Polym Degrad Stab 2013. [DOI: 10.1016/j.polymdegradstab.2013.07.004] [Citation(s) in RCA: 123] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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48
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Bikiaris DN. Nanocomposites of aliphatic polyesters: An overview of the effect of different nanofillers on enzymatic hydrolysis and biodegradation of polyesters. Polym Degrad Stab 2013. [DOI: 10.1016/j.polymdegradstab.2013.05.016] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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49
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Preparation of highly flexible chitin nanofiber-graft-poly(γ-l-glutamic acid) network film. Polym Bull (Berl) 2013. [DOI: 10.1007/s00289-013-1020-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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50
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Fei P, Shi Y, Zhou M, Cai J, Tang S, Xiong H. Effects of nano-TiO2on the properties and structures of starch/poly(ε-caprolactone) composites. J Appl Polym Sci 2013. [DOI: 10.1002/app.39695] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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