Macromolecular Materials and Engineering最新文献

{"title":"Combining Injection Molding and 3D Printing for Tailoring Polymer Material Properties","authors":"Michelle Vigogne,&nbsp;Carsten Zschech,&nbsp;Markus Stommel,&nbsp;Julian Thiele,&nbsp;Ines Kühnert","doi":"10.1002/mame.202400210","DOIUrl":"10.1002/mame.202400210","url":null,"abstract":"<p>Modern polymer-based technical components not only have to fulfill demanding mechanical-structural properties but need to integrate different functions to yield hybrid systems for complex operations. Typically, neither materials nor processing technologies are fully compatible with each other. The aim of the work is to combine the advantages of seemingly incompatible manufacturing processes such as high-volume injection molding (IM) and precision additive manufacturing to produce functional and customized hybrid materials. IM is widely used for polymer processing but stands against high investment costs for tailor-made molds with high-resolution features. They focus on overprinting of injection-molded parts made of thermoplastic polyurethane (TPU) with microstructures via projection-microstereolithography (PµSL) to generate hybrid polymer materials with spatially tailored stiffness, enabling selective reinforcement, resulting in an E modulus increase of 195% compared to mere IM-processed TPU. With that, the hybridization of processing methods is showcased to extend the product properties of polymer materials obtained via either IM or PµSL printing that have, prospectively, a maximum degree of individualization as well as a multitude of structural and functional features at the same time. To achieve optimum interfacial adhesion, the influence of surface roughness is studied, and reinforcement effects of different overprinted microstructure types are evaluated.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 11","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400210","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141921714","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":"Chitosan/Silica Hybrid Nanogels by Inverse Nanoemulsion for Encapsulating Hydrophilic Substances","authors":"Asmaa M. Elzayat, Katharina Landfester, Rafael Muñoz‐Espí","doi":"10.1002/mame.202400151","DOIUrl":"https://doi.org/10.1002/mame.202400151","url":null,"abstract":"A strategy for the preparation of a hybrid chitosan/silica nanohydrogel is reported, which combines the gelation of chitosan in a nanoemulsion system with a sol–gel process to produce silica. Chitosan is used as a biopolymer matrix, while silica acts as a structuring additive. Hydrogel nanocapsules are obtained through the ionic interaction of the cationic groups of chitosan with the anionic groups of sodium triphosphate (STP), which is used as a physical cross‐linker. Two alternative preparation methods are compared in this work: in the first one, STP is added to the continuous phase of an inverse emulsion of chitosan; in the second one, the fusion of droplets of two emulsions containing separate chitosan and STP takes place. The size of the obtained nanocapsules ranges from 50 to 200 nm. The efficiency of the formed hydrogel for entrapping a hydrophilic model substance (erioglaucine disodium salt) is investigated for the two systems by studying the release in a neutral aqueous medium. The results indicate that the hydrophilic cargo is efficiently encapsulated by both preparation methods, although the droplet‐fusion method yields more stable suspensions. As a general observation, the release behavior of erioglaucine is systematically retarded when silica is present in the systems.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"47 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141945365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"3D Printed PLA Porous Scaffolds with Engineered Cell Size and Porosity Promote the Effectiveness of the Kelvin Model for Bone Tissue Engineering","authors":"Arman Barzgar Torghabeh,&nbsp;Iman Barzgar Torghabeh,&nbsp;Morteza Kafaee Razavi","doi":"10.1002/mame.202400212","DOIUrl":"10.1002/mame.202400212","url":null,"abstract":"<p>In this study, the aim is to investigate the effect of engineering the cell size and porosity of 3D-printed poly lactic acid (PLA) porous scaffolds from the Kelvin model for bone tissue engineering applications. The Kelvin model is used as a bone tissue scaffold with different cell sizes and porosities. PLA, as a biodegradable and biocompatible polymer, is used to fabricate these scaffolds using the FDM technique. A compression test is used to evaluate the mechanical properties of scaffolds. The MTT assay has been used to investigate cell viability. For osteogenic differentiation studies, ALP activity and ARS assays are used. Increasing the porosity reduces the mechanical properties of the scaffold. While increasing the cell size at constant porosity increases the Young's modulus and yield stress in the samples, it is also observed that, in high porosities, the increase in cell size weakens the mechanical properties. Also, Kelvin model scaffolds help the proliferation and osteogenic differentiation of cells and have no toxic effect. It is demonstrated that this approach promotes the effectiveness of the Kelvin architecture for bone tissue engineering. As a result, designing the most suitable model based on cell size and porosity for the treatment process in the targeted area could be promising.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 12","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400212","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141945346","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":"Green Electrospinning of Highly Concentrated Polyurethane Suspensions in Water: From the Rheology to the Fiber Morphology","authors":"Bryan Gross,&nbsp;Guy Schlatter,&nbsp;Pascal Hébraud,&nbsp;Flavien Mouillard,&nbsp;Lotfi Chehma,&nbsp;Anne Hébraud,&nbsp;Emeline Lobry","doi":"10.1002/mame.202400157","DOIUrl":"10.1002/mame.202400157","url":null,"abstract":"<p>Suspension electrospinning allows the environmental-friendly fabrication of nano-micro-fibrous membranes since it is based on the processing of an aqueous particle suspension in which a hydrosoluble template polymer is added to insure the formation of a continuous fiber. Here, the case of polyurethane (PU) aqueous suspensions formulated with poly(ethylene oxide) (PEO) as the template polymer is studied. The effect of several parameters (particle size, PU/PEO ratio, PEO molar mass, and PEO concentration in the continuous phase) on particle-particle and particle-template polymer interactions that influence the rheological properties of the formulation and finally the electrospinning and the fiber morphology, is studied. The goal is to process a formulation with the highest particle content as possible. Thanks to a deep rheological investigation and the study of interactions and suspension morphology by zeta potential and diffusing wave spectroscopy, it is shown that regular fibers are efficiently produced when small particles are electrospun under favorable particle-template polymer interactions and without screening the electrostatic repulsion between particles. Finally, a fibrous membrane is obtained from a formulation with a PU/PEO weight ratio equal to 50 under very stable and efficient production conditions.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 12","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400157","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141945345","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":"Unveiling the Hidden Networks: AFM Insights into Pre-Vulcanized Hevea Latex and Its Profound Impact on Latex Film Mechanical Properties","authors":"Narueporn Payungwong,&nbsp;Ken Nakajima,&nbsp;Chee-Cheong Ho,&nbsp;Jitladda Sakdapipanich","doi":"10.1002/mame.202400211","DOIUrl":"10.1002/mame.202400211","url":null,"abstract":"<p>Natural rubber (NR) films with different natural networks—concentrated NR (CNR), deproteinized NR (DPNR), and small rubber particles (SRP)—are investigated to explore the relationship between network structure and film properties using atomic force microscopy (AFM) in PeakForce Quantitative Nanomechanics (QNM) mode. Nitrogen content, gel content, and particle size distribution analyses reveal distinct network topologies in each latex type. Mechanical testing shows variations in tensile strength and crosslink density. AFM analysis provides insights into the crosslink network structures within the pre-vulcanized latex film. It is found that DPNR and CNR films have a uniform distribution of crosslink networks, with DPNR exhibiting higher Young's modulus values. In contrast, SRP shows varying Young's modulus values, suggesting poor coalescence arising from a harder particle surface and a softer rubber core in an inhomogeneous network structure intrinsic to the non-rubber components (NRCs) make-up of SRP latex. This study highlights the pivotal role of natural network structures formed by NRCs in determining the ultimate properties of latex films, which has significant implications for the rubber industry, particularly in the production of latex-dipped products, medical devices, and bioengineering applications.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 12","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400211","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141867293","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":"Thermo-Compressed Films of Poly(butylene succinate) Reinforced with Cellulose Fibers Obtained from Rice Straw by Green Extraction Methods","authors":"Carmen Olivas-Alonso,&nbsp;Pedro A. V. Freitas,&nbsp;Sergio Torres-Giner,&nbsp;Amparo Chiralt","doi":"10.1002/mame.202400094","DOIUrl":"10.1002/mame.202400094","url":null,"abstract":"<p>In this study, two green extraction methods are explored to valorize rice straw into cellulose fibers (CFs), namely subcritical water extraction (SWE) and combined ultrasound-heating treatment (USHT). The resultant fibers are, thereafter, successfully pretreated with (3-glycidyloxypropyl) trimethoxysilane (GPS) and incorporated at 3% wt into poly(butylene succinate) (PBS) by melt-mixing. The green composites are shaped into films by thermo-compression and characterized in terms of their performance for food packaging applications. The chemical analysis of the fibers reveals that SWE is more effective to selectively remove hemicelluloses than USHT, whereas silanization promotes the removal of lignin in both fiber types. Fiber incorporation, more notably in the case of the silanized fibers, restricts the movement of the PBS chains, indicating good interaction with the biopolyester matrix. In particular, CFs act as antinucleating agents in PBS, delaying both glass transition and crystallization from the melt phenomena and hindering crystal formation. Furthermore, the fibers mechanically reinforce and improve the oxygen barrier of the PBS films. The highest barrier enhancement is obtained for the thermo-compressed composite film with silanized fibers obtained by SWE, yielding a decrease of nearly 20% in the permeability to oxygen versus the unfilled PBS film.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 10","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400094","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141785913","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":"Sustainable Silica-Carbon Nanofiber Hybrid Composite Anodes for Lithium-Ion Batteries","authors":"Anne Beaucamp,&nbsp;Amaia Moreno Calvo,&nbsp;Deaglán Bowman,&nbsp;Clotilde Techouyeres,&nbsp;David Mc Nulty,&nbsp;Erlantz Lizundia,&nbsp;Maurice N. Collins","doi":"10.1002/mame.202400202","DOIUrl":"10.1002/mame.202400202","url":null,"abstract":"<p>Alternative anode materials with increased theoretical specific capacities are under scrutinity as a replacement to graphite in lithium-ion batteries (LiBs). Silicon oxides offer increased capacities compared to graphite and do not suffer the same level of material expansion as pure Si. Consequently, they are an intermediate commercial anode material, on the pathway toward pure Si anodes. In this study, stable Silica/carbon (SiO₂/C) nanofibers are successfully developed from tetraethyl orthosilicate (TEOS) using poly(vinylpyrrolidone) (PVP). The fibers show excellent stability after calcination, with silica evenly dispersed within the fibers exhibiting a surface area of 327 m² g⁻¹. This study demonstrates that the electrochemical performance of SiO₂/C composite anodes is significantly influenced by the silica content. SiO₂/C composites with ≈68 at% SiO₂ achieve reversible capacities of 315.6 and 300.9 mAh g⁻¹, after the 2nd, and 800th cycles, respectively, at a specific current of 100 mA g⁻¹, with a remarkable capacity retention of 95.3%. In a second stage, lignin is added as a potential nanostructuring agent. The addition of lignin to the sample reduces the amount of silica without significantly impacting its performance and stability. Tailoring the composition of SiO₂/C composite anodes enables stable capacity retention over the course of hundreds of cycles.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 12","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400202","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141782411","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":"Happy Birthday, Rolf Mülhaupt!","authors":"Holger Frey","doi":"10.1002/mame.202400254","DOIUrl":"10.1002/mame.202400254","url":null,"abstract":"<p>With this issue of <i>Macromolecular Materials and Engineering</i>, celebrating 25 years of the journal, the editors, friends, and colleagues congratulate Prof. Rolf Mülhaupt on the occasion of his 70th birthday in September 2024. The broad range of topics assembled in this volume reflects the impressive scope of topics, Rolf Mülhaupt's research has addressed. It was briefly sketched how these have evolved from the different stations of his career in a previous editorial in a sister journal.^[<span>¹</span>^]</p><p>The ten years that have passed since this review of Rolf Mülhaupt's outstanding and unconventional scientific career have certainly held unexpected developments. Only a few days after the conference “<i>Makromolekulares Kolloquium”</i> in Freiburg in February 2020 honored him on the occasion of his upcoming formal retirement from his chair position at the Institute of Macromolecular Chemistry, public and academic life were shut down by a pandemic. Also, he was not spared from “remote teaching” in the following. His scientific curiosity and productivity are, of course, uncompromised, as also evidenced by his published oeuvre. Within the breadth of Rolf Mülhaupt's contributions, as an example of his interests in the past decade, it is certainly appropriate to highlight additive manufacturing, reflected in a review article that has been cited already more than 2500 times since its appearance in 2017.^[<span>²</span>^] This topic—in which he was active very early on actually—has moved on to—among others—3D printing of polyolefins with his team. This again takes advantage of his development of “all-polyethylene” composites, which achieve outstanding material performance yet are also well processable, thereby providing improved circularity. Concerning the intensely discussed issue of polymer materials' circularity, the scientific community continues to benefit from Rolf Mülhaupt's to-the-point and sometimes sobering assessments of reality, for instance in “Green Polymer Chemistry and Bio-based Plastics: Dreams and Reality”,^[<span>³</span>^] a highly cited perspective on this research area and its future options.</p><p>Together with all other authors that have contributed to this volume, and with the entire team of the Macromolecular journals, I congratulate Rolf Mülhaupt on the occasion of his anniversary and wish him continued delight in science in the years to come!</p><p></p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 9","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400254","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141782413","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":"Development of Ductile-Sticky Bone Fillers from Biodegradable Hydrolyzed Wool-Keratin and Silk Fibroin","authors":"Serife Bekar,&nbsp;Tugba Sezgin Arslan,&nbsp;Yavuz Emre Arslan","doi":"10.1002/mame.202400144","DOIUrl":"10.1002/mame.202400144","url":null,"abstract":"<p>In the present study, a method is proposed for preparing novel ductile-sticky materials that can be used as bone void fillers using hydrolyzed wool-keratin (WK) and silk fibroin (SF). This methodology uses citric acid as a cross-linking agent in preparing keratin paste (KP) owing to its non-toxicity and plasticizing properties. The Keratin paste-silk fibroin structure (KPSF) is obtained by adding SF, which possesses biocompatible and superior mechanical properties. Methanol treatment is employed on the KPSF mixture to convert the Silk I structure in the SF to Silk II, resulting in a water-insoluble and tightly packed proteinaceous structure. The physicochemical properties of both bioscaffolds are investigated and discussed in detail by comparison. Based on the findings, the presence of SF in the KPSF structure contributed to properties such as flexibility and porosity. In ovo CAM analysis reveals that both materials exhibit proangiogenic properties and are biocompatible. KP and KPSF bioscaffolds can be converted into ductile-sticky forms by adding water. It believes that these forms can easily apply to bone defect areas, particularly cavitary bone defects. Furthermore, KPSF bioscaffolds, with better mechanical properties, can be considered candidates for use in non-load-bearing bone tissue engineering applications.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 11","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400144","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141782417","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":"The Design and Fabrication of Engineered Tubular Tissue Constructs Enabled by Electrohydrodynamic Fabrication Techniques: A Review","authors":"Fucheng Zhang,&nbsp;Kai Cao,&nbsp;Ahmadreza Zaeri,&nbsp;Ralf Zgeib,&nbsp;Robert C. Chang","doi":"10.1002/mame.202400095","DOIUrl":"10.1002/mame.202400095","url":null,"abstract":"<p>Electrohydrodynamic processes have emerged as promising methods for fabricating polymetric fiber-based artificial tubular tissues. Existing review articles focus on the biological applications and processing materials associated with electrohydrodynamic processes in artificial tubular constructs, while overlooking the design and fabrication of these constructs. To address this gap, this review article emphasizes the design and fabrication of tubular tissue constructs enabled by employing electrohydrodynamic processes. This article begins by presenting an overview of two electrohydrodynamic processes: solution electrospinning (SE) and melt electrowriting (MEW). It then delves into the control of the fiber diameter enabled by SE and MEW, offering insights into the manipulation of processing parameters to achieve desired fiber diameters. Additionally, the review highlights cutting-edge strategies for electrohydrodynamic processes to create tubular structures with customized microarchitectures. This includes fiber alignment control for SE and pore morphology design for MEW. Moreover, the review covers the creation of customized macroscale tubular geometries through collector geometry design. Lastly, a comprehensive survey is presented for designing multiphasic tubular structures specifically for electrohydrodynamic techniques or in tandem with other techniques. The objective of this review is to offer a thorough understanding of the design considerations and potential applications of tubular structures fabricated by electrohydrodynamic processes.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 9","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400095","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141743906","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}