Vincenzo Titone, Luigi Botta, Francesco Paolo La Mantia
{"title":"Mechanical Recycling of New and Challenging Polymer Systems: A Brief Overview","authors":"Vincenzo Titone, Luigi Botta, Francesco Paolo La Mantia","doi":"10.1002/mame.202400275","DOIUrl":"https://doi.org/10.1002/mame.202400275","url":null,"abstract":"<p>Pollution from plastics is a major issue in the current context, prompting the scientific community to focus its efforts on recycling these materials. Mechanical recycling emerges as the most popular due to its practicality and cost-effectiveness. In fact, with the increase in environmental awareness, the adoption of new circular economy models, stricter regulations mandating disposal and recycling, and lower costs compared to other recycling techniques, this type of recycling is taking a predominant role over other method. However, the presence of a variety of products of different polymeric nature, the introduction of new biodegradable products, and the complexity of multilayer packaging combining different polymers, without concrete solutions for recycling create a heterogeneous range of materials that leaks into the environment. The scientific literature is actively addressing these challenges, and this review aims to explore the latest strategies for enhancing the mechanical recycling of new and challenging polymer systems. Specifically, it explores the recycling of materials originally designated for landfill, incineration or composting, focusing on advancements in management of these previously overlooked and problematic system. This underexplored perspective seeks to offer new insights and innovative solutions that can transform polymer waste management and advance more sustainable recycling practices.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400275","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143112334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xiuling Zhang, Kai Yang, Dana Kremenakova, Jiri Militky
{"title":"Side Illumination Behavior and Mechanical Properties of Twisted End-Emitting Polymer Optical Fiber Bundles","authors":"Xiuling Zhang, Kai Yang, Dana Kremenakova, Jiri Militky","doi":"10.1002/mame.202400301","DOIUrl":"https://doi.org/10.1002/mame.202400301","url":null,"abstract":"<p>Polymer optical fibers (POFs), including side-emitting POF (SEPOF) and end-emitting POF (EEPOF) are developed for luminous textiles. The SEPOF is more common for usage but suffers from significant intensity decay, which limits its effective usage length. In contrast, the EEPOF can provide a much more stable side illumination behavior than SEPOF since the light is largely confined within the EEPOF, while its side illumination requires special treatment. In this work, 0.5 mm diameter EEPOFs were firstly assembled into bundles with 10 EEPOFs (B10) and 15 EEPOFs (B15), and then twisted. The morphology, tensile properties, and side illumination behavior of the twisted EEPOF bundles are evaluated. With an increased twisting degree, the initial modulus of twisted sample B10 increases (due to shortening of bundle diameter) from 1.06 to 1.17 GPa while the initial modulus of twisted sample B15 decreases from 1.01 to 0.91 GPa. The increased twisting degree also results in the higher flexibility (indirectly connected with modulus) of the twisted EEPOF bundles. Besides, the increased twisting degree results in a higher side illumination intensity meantime causes a decreased side illumination intensity along the light penetration path. When the twisting degree is low (e.g., 10 T m<sup>−1</sup>), the highest decrease rate of side illumination intensity along the light penetration path is found.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 2","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400301","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Damla Aykora, Ayhan Oral, Cemre Aydeğer, Metehan Uzun
{"title":"3D Bioprinting Strategies for Melatonin-Loaded Polymers in Bone Tissue Engineering","authors":"Damla Aykora, Ayhan Oral, Cemre Aydeğer, Metehan Uzun","doi":"10.1002/mame.202400263","DOIUrl":"https://doi.org/10.1002/mame.202400263","url":null,"abstract":"<p>Bone pathologies are still among the most challenging issues for orthopedics. Over the past decade, different methods are developed for bone repair. In addition to advanced surgical and graft techniques, polymer-based biomaterials, bioactive glass, chitosan, hydrogels, nanoparticles, and cell-derived exosomes are used for bone healing strategies. Owing to their variation and promising advantages, most of these methods are not translated into clinical practice. Three dimensonal (3D) bioprinting is an additive manufacturing technique that has become a next-generation biomaterial technique adapted for anatomic modeling, artificial tissue or organs, grafting, and bridging tissues. Polymer-based biomaterials are mostly used for the controlled release of various drugs, therapeutic agents, mesenchymal stem cells, ions, and growth factors. Polymers are now among the most preferable materials for 3D bioprinting. Melatonin is a well-known antioxidant with many osteoinductive properties and is one of the key hormones in the brain–bone axis. 3D bioprinted melatonin-loaded polymers with unique lipophilic, anti-inflammatory, antioxidant, and osteoinductive properties for filling large bone gaps following fractures or congenital bone deformities may be developed in the future. This study summarized the benefits of 3D bioprinted and polymeric materials integrated with melatonin for sustained release in bone regeneration approaches.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400263","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jordi Sans, Ingrid Azevedo Gonçalves, Drialys Cardenas-Morcoso, Robert Quintana
{"title":"Synthesis of Ultrathin Film PEGDMA Hydrogels Coated onto Different Surfaces by Atmospheric Pressure Plasma: Characterization and Potential Features for the Biomedical Field","authors":"Jordi Sans, Ingrid Azevedo Gonçalves, Drialys Cardenas-Morcoso, Robert Quintana","doi":"10.1002/mame.202400230","DOIUrl":"https://doi.org/10.1002/mame.202400230","url":null,"abstract":"<p>The preparation of resistant ultrathin film (utf) hydrogels coated onto different working surfaces (e.g., fabrics) is paying increasing attention as an advantageous strategy for customizing their resultant properties. More specifically, poly(ethylene glycol) (PEG)-based utf-hydrogels are relevant for their superior biocompatibility or antibiofouling properties. However, promoting the generation of poly(ethylene glycol) dimethacrylate (PEGDMA) cross-links ideally without the use of initiators or other cross-link agents, which might compromise the final bioactivity of the system, is complicated. Moreover, the actual synthesis techniques used for the preparation of such utf-hydrogels face important drawbacks like high scale-up costs or important geometrical restrictions, completely hindering its technological transfer. Herein, for the first time and easy and technologically scalable technology is reported for the synthesis and direct deposition of PEGDMA<sub>400</sub> utf-hydrogels onto different substrates based on atmospheric pressure nanosecond pulsed plasma approach. The advantages of the technology are explored and discussed, reporting the ready-to-use transparent coating of fabrics. After washing the samples using washing programs of a commercial laundry machine, coatings are still well adhered, showing excellent stability. Finally, the resultant properties of PEGDMA<sub>400</sub> utf-hydrogels are exhaustively characterized using in operando conditions in order to elucidate their potential capabilities in the biomedical field.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400230","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Roland Told, Kinga Kardos, Emese Paari-Molnar, Gabor Szabo, Zoltan Ujfalusi, Nitin Sahai, Peter Szabo, Peter Maroti
{"title":"Comparative Analysis of Mechanical and Thermal Characteristics of 3D-Printed Polyamide using Material Extrusion and Powder Bed Fusion Process with Industrial and Desktop Printers","authors":"Roland Told, Kinga Kardos, Emese Paari-Molnar, Gabor Szabo, Zoltan Ujfalusi, Nitin Sahai, Peter Szabo, Peter Maroti","doi":"10.1002/mame.202400293","DOIUrl":"https://doi.org/10.1002/mame.202400293","url":null,"abstract":"<p>Polyamide (PA) has excellent mechanical properties, making it versatile in various applications, including 3D printing. This paper comprehensively investigates and compares the mechanical, structural, thermal, and geometric properties of 3D-printed PA12 samples produced with desktop and industrial printers using material extrusion (MEX) and powder bed fusion (PBF) processes. The mechanical tests included tensile, flexural, Charpy impact, Shore hardness, torsion, and water absorption tests. Additionally, scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and melt volume rate (MVR) measurements are conducted. To verify printing accuracy from a biomedical perspective, 3D-printed prosthetic fingers are subjected to geometric assessments. Industrial PBF samples show significantly higher values for most mechanical properties, including a tensile Young's modulus of 1776 ± 19.42 MPa, while the second highest value is 1419 ± 58.77 MPa (MEX desktop). Furthermore, the MVR of the PBF industrial samples is the highest (18.34 cm<sup>3</sup>/10 min ± 2.32 cm<sup>3</sup>/10 min) and this printer exhibits superior performance in printing accuracy than the other printers. The balanced print quality and mechanics make the PBF industrial printer the most recommended for medical device production, but lower-priced desktop FFF printers can be a good alternative for simple, fast solutions that do not require high precision.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 2","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400293","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Muhammad Solihul Mu'min, Anja Krieger, Maximilian Wagner, Simon Thiele, Jochen Kerres
{"title":"High-Throughput Electrospinning of Unmodified and Aminated Poly(Pentafluorostyrene) for Fiber-Reinforced Proton Exchange Membranes","authors":"Muhammad Solihul Mu'min, Anja Krieger, Maximilian Wagner, Simon Thiele, Jochen Kerres","doi":"10.1002/mame.202400078","DOIUrl":"https://doi.org/10.1002/mame.202400078","url":null,"abstract":"<p>This study demonstrates a high-throughput fabrication of fiber interlayers for proton exchange membranes based on poly(pentafluorostyrene) (PPFSt) and its aminated derivatives. The fibers are produced by electrospinning, where the parameters are carefully screened. The controlled parameters are solvent composition, weight percentage, voltage, flow rate, and temperature, controlled with a self-designed heating jacket. The parameters are iterated toward optimized fiber structure and maximum output. The yielded fibers are infiltrated with Nafion and sulfonated polymer from bisphenol AF and decafluorobiphenyl (SFS001) by spray-coating and doctor blading to obtain the fiber-reinforced proton exchange membranes. Tensile tests reveal a higher Young's modulus and yield stress than pure Nafion. Here, the basicity of the aminated PPFSt fibers correlates with the Young's modulus due to improved acid-base interactions between amine groups and sulfonic acid. The acid-base interactions influence the composite membrane's proton conductivity, varying from 23 mS cm<sup>−1</sup> for strongly alkaline fibers to 69 mS cm<sup>−1</sup> for non-basic fibers. These findings can be transferred to fabricating fiber reinforcements beyond routinely used poly(benzimidazoles).</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400078","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143120490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Blessing E. Itabana, Amar K. Mohanty, Phil Dick, Mohini Sain, Atul Bali, Mike Tiessen, Loong-Tak Lim, Manjusri Misra
{"title":"Poly (Butylene Adipate-Co-Terephthalate) (PBAT) – Based Biocomposites: A Comprehensive Review","authors":"Blessing E. Itabana, Amar K. Mohanty, Phil Dick, Mohini Sain, Atul Bali, Mike Tiessen, Loong-Tak Lim, Manjusri Misra","doi":"10.1002/mame.202400179","DOIUrl":"https://doi.org/10.1002/mame.202400179","url":null,"abstract":"<p>With the issue of plastic waste persisting and the need for more sustainable solutions to the ever-increasing demand for lightweight and durable plastic products, this review has become imminent and compelling. Poly (butylene adipate-co-terephthalate) (PBAT) is a biodegradable polymer with exceptional film-forming ability resembling those of low-density polyethylene. PBAT has a huge advantage for packaging applications due to its remarkably high elongation at break, giving it a good processing window for its application in packaging. However, certain defiant intrinsic properties stand in the way of its full commercialization. The development of blends and biocomposites of PBAT has, therefore, become imperative for complementing its properties and producing a superior material. This paper focuses on the recent developments in preparing PBAT-based blends and biocomposites with superior mechanical, barrier, and antimicrobial properties and, most importantly, has also investigated how the development of these blends and biocomposites impacts the biodegradation rate of PBAT. It also highlights the possible synthesis of bio-based PBAT and the commercialization, market trends, and prospects of PBAT-based materials for flexible, rigid packaging, and other industrial applications compared with biodegradable alternatives.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 12","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400179","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sepideh Keyvani, Farideh Golbabaei, Rasoul Esmaeely Neisiany, Oisik Das, Mohammad Reza Pourmand, Saba Kalantary
{"title":"Filtration Performance of Biodegradable Electrospun Nanofibrous Membrane for Sub-Micron Particles: A Systematic Review","authors":"Sepideh Keyvani, Farideh Golbabaei, Rasoul Esmaeely Neisiany, Oisik Das, Mohammad Reza Pourmand, Saba Kalantary","doi":"10.1002/mame.202400323","DOIUrl":"https://doi.org/10.1002/mame.202400323","url":null,"abstract":"<p>Nanofiber membranes receive considerable interest recently because of their distinctive structural features, facile preparation, as well as high filtering efficiency. Due to ever-increasing air pollution, membranes made from biodegradable materials can play a crucial part in providing purified air with minimum concerns of environmental issues after the membrane's end of service life. The purpose of this systematic review is to assess the performance of biodegradable electrospun nanofibrous membrane filters toward air sub-micron particles. To identify relevant studies, a systematic search is carried out in major scientific search engines including PubMed, Scopus, and the Web of Science. Data extraction is used to collect the necessary information on the membranes' structural properties, as well as filtration performance metrics such as efficiency, pressure drop, and quality factor. Among the electrospun membranes derived from biodegradable polymers, the polyvinyl alcohol (PVA)-based electrospun membranes are more effective in filtration efficiency in capturing sub-micron particles. The results highlight that these types of membranes are effective in filtration with low energy consumption, making them more apt for air purification. The use of such membranes can supply both high filtering performance and protection of the environment.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 3","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400323","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mahdi Kargar-Esfandabadi, Marzieh Golshan, Hossein Roghani-Mamaqani, Mehdi Salami-Kalajahi
{"title":"On the Electrochemical Properties of Poly(Vinylidene Fluoride)/Polythiophene Blends Doped with Lithium-Based Salt","authors":"Mahdi Kargar-Esfandabadi, Marzieh Golshan, Hossein Roghani-Mamaqani, Mehdi Salami-Kalajahi","doi":"10.1002/mame.202400340","DOIUrl":"https://doi.org/10.1002/mame.202400340","url":null,"abstract":"<p>In this study, polymer blends of polythiophene (PTH) and poly(vinylidene fluoride) (PVDF) are investigated by focusing on their structural and electrochemical characteristics. These blends displayed immiscibility confirmed through field emission scanning electron microscopy (FE-SEM) and interaction assessments. PTH's role as a plasticizer is evident, diminishing crystallinity. A rise in PTH level led to a lower glass transition temperature and a higher melting point, suggesting reduced intermolecular forces and increased polymer chain flexibility. Conversely, a dispersed phase presence elevated the melting point, restricting chain movement and crystallization. The thermal properties of blends are enhanced by increased PTH content. Applying the Vogel–Tammann–Fulcher model to ionic conductivity measurements, it observed a direct relationship between temperature and free volume, impacting conductivity and ion transport numbers. Certain materials exhibit increased activation energies, indicating substantial thermodynamic barriers to local motion. Higher PTH content within the PVDF matrix notably increased the lithium ion transfer number from 0.22 to 0.71, a change tied to the C–S–C structure of polythiophene. However, elevated PTH levels also led to diminished negative charge transfer and ionic conductivity in the PTH-PVDF blend compared to pure PVDF, likely due to an ionic conduction hindrance.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 3","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400340","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Diffusion Behavior of Organic Solvents in Graphene Oxide/Nano Silica Hybrid Natural Rubber Latex Nanocomposite: Experimental and Theoretical Approach","authors":"Prajitha Velayudhan, Jibin Keloth Paduvilan, Abitha VK, Sisanth Krishnagehum Sidhardhan, Sabu Thomas","doi":"10.1002/mame.202400228","DOIUrl":"https://doi.org/10.1002/mame.202400228","url":null,"abstract":"<p>This study explores the impact of a graphene oxide (GO)/nano silica (NS) hybrid (GO/NS) filler on the diffusion characteristics of natural rubber (NR) composites when exposed to toluene, xylene, and hexane solvents. The lowest solvent uptake is observed for NR GO/NS 3 (3 phr), which is attributed to forming a robust filler network within the composite. The calculation of crosslink density using the Flory-Rehner equation reveals significantly higher values for NR GO/NS 3, indicating good crosslinking density in the presence of the hybrid filler. Furthermore, molecular mass between crosslinks (Mc) is calculated, demonstrating a favorable fit with the Affine model. The investigation extends to theoretical modeling, where the Korsemeyer–Peppas and Peppas–Sahlin models are employed to predict solvent uptake behavior. Strikingly, the experimental values exhibit a strong alignment with the Peppas–Sahlin model. This comprehensive analysis provides valuable insights into the diffusion behavior of graphene oxide/nano silica (GO/NS) hybrid-reinforced natural rubber latex in organic solvents, highlighting potential applications in areas such as solvent-resistant coatings, barrier materials for chemical storage, and enhanced performance in protective gloves and seals used in harsh chemical environments.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400228","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143119589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}