Macromolecular Materials and Engineering最新文献_第7页

Melt-Processable and Electrospinnable Shape-Memory Hydrogels 可熔融加工和可电纺丝的形状记忆水凝胶

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-06-28 DOI: 10.1002/mame.202400166

Turdimuhammad Abdullah, Cagatay Altınkok, Oguz Okay

{"title":"Melt-Processable and Electrospinnable Shape-Memory Hydrogels","authors":"Turdimuhammad Abdullah, Cagatay Altınkok, Oguz Okay","doi":"10.1002/mame.202400166","DOIUrl":"10.1002/mame.202400166","url":null,"abstract":"Due to their ability to adapt to subtle changes in response to various external and internal stimuli, smart hydrogels have become increasingly popular in research and industry. However, many currently available hydrogels suffer from poor processability and inferior mechanical properties. For example, the preparation of a hydrogel network that can be subjected to melt processing and electrospinning is challenging. Herein, a series of mechanically strong, shape-memory hydrogels based on polyacrylic acid (PAAc) chains containing 20–50 mol% of crystallizable n-octadecylacrylate (C18A) segments are prepared by an organosolv method followed by in situ physical cross-linking via hydrophobic interactions. The hydrogels exhibit a reversible strong to weak gel transition at 50–60 °C and can be melt-processed at 60–100 °C, depending on the molar fraction of C18A. Additionally, the hydrogels can be dissolved in chloroform/ethanol mixture to form a viscous solution, which can then be used to produce a nanofibrous network by electrospinning. Effects of polymer concentration, volume ratio of solvents, and mole fraction of C18A on electrospinning are investigated to produce smooth, uniform nanofibers with small fiber diameter. The produced nanofibers, while maintaining their chemical structure, show significantly improved water adsorption capacity, enhanced mechanical properties, and fast shape-memory performance.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 12","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400166","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141526778","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}

引用次数: 0

Negative Voltage Electrospinning for the Production of Highly Efficient PVDF Filters 负压电纺丝法生产高效 PVDF 过滤器

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-06-26 DOI: 10.1002/mame.202300442

Carlo Gotti, Monica Torsello, Riccardo Onesti, Gianmarco Tanganelli, Alberto Sensini, Cristiana Boi, Davide Fabiani, Maria Letizia Focarete, Andrea Zucchelli

{"title":"Negative Voltage Electrospinning for the Production of Highly Efficient PVDF Filters","authors":"Carlo Gotti, Monica Torsello, Riccardo Onesti, Gianmarco Tanganelli, Alberto Sensini, Cristiana Boi, Davide Fabiani, Maria Letizia Focarete, Andrea Zucchelli","doi":"10.1002/mame.202300442","DOIUrl":"10.1002/mame.202300442","url":null,"abstract":"In recent years, the demand for filter media has increased dramatically, driven by the need to manufacture personal protective equipment and for various applications in the industrial and civil sectors. Nanofiber-based membranes are proposed as potential alternatives to commercial filtration devices. This study presents the design and implementation of an innovative pre-industrial electrospinning setup, combining a negatively charged spinneret and a positively charged counter-electrode, capable of producing polyvinylidene fluoride (PVDF) nanofibers with an average diameter of 410 nm and electrostatic surface potential values 3.7 times higher compared to a conventional electrospinning process, eliminating the need for further post-treatment. These properties are essential for improving mechanical and electrostatic filtration of small particles, including infectious droplets. The surface potential of the membranes is also long-lasting, as evidenced by tests one year after manufacture. As a case-study, these filters are used to manufacture surgical masks, reporting excellent performance in terms of bacterial filtration efficiency (BFE) up to 99.9%, and breathability (29.8±4.5 Pa cm−2) when compared to commercially available meltblown polypropylene (PP) face masks, and also complied with the stringent European standard (EN14683:2019) for type-II surgical masks. Furthermore, the pre-industrial setup allows for increased production capacity of up to 42 000 m2 per year, suitable for large-scale production.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 11","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202300442","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141526779","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}

引用次数: 0

Material Testing for Physicists: Unraveling the Dissipative Nature of Silicone Elastomers via Ball Drop Testing 物理学家的材料测试：通过落球测试揭示有机硅弹性体的耗散特性

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-06-25 DOI: 10.1002/mame.202400085

Rene Preuer, Carina Emminger, Umut Cakmak, Ingrid Graz

{"title":"Material Testing for Physicists: Unraveling the Dissipative Nature of Silicone Elastomers via Ball Drop Testing","authors":"Rene Preuer, Carina Emminger, Umut Cakmak, Ingrid Graz","doi":"10.1002/mame.202400085","DOIUrl":"10.1002/mame.202400085","url":null,"abstract":"Isaac Newton once contemplated the fall of an apple, setting in motion a revolution in the understanding of gravity. In a similar spirit of curiosity and inquiry, here a journey is embarked upon to explore the intricate world of viscoelastic damping for polydimethylsiloxanes (PDMS). Inspired by the notion that even the simplest of phenomena can yield profound insights, a novel approach to study damping in silicone elastomers through a simple ball drop test is introduced. This novel solution allowes for precise measuring and analyzing the material's damping characteristics under various conditions. By carefully controlling the release and monitoring, the response of the falling ball by simple video tracking, valuable insights into the key viscoelastic properties of silicone blends are extracted, including rebound resilience, Young's modulus, and complex modulus. Through the analysis of trajectory data generated during the sphere's interaction with the silicone damper, dynamic and static material parameters are determined. Remarkably, these outcomes closely align with results obtained from cost-intensive and high-maintenance industrial measurement setups such as dynamic thermomechanical analysis (DTMA) or tensile testing. This approach not only simplifies the complexity of the system but also offers a cost-effective and efficient means of gaining essential knowledge in material science.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 10","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400085","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141529309","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}

引用次数: 0

Facile Fabrication of Starch-Based UV Barrier Films with Remolding Ability and Reinforcement for Water Resistance 轻松制备具有重塑能力和增强防水性的淀粉基紫外线阻隔薄膜

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-06-14 DOI: 10.1002/mame.202400137

Kazuki Shibasaki, Yu-I Hsu, Hiroshi Uyama

{"title":"Facile Fabrication of Starch-Based UV Barrier Films with Remolding Ability and Reinforcement for Water Resistance","authors":"Kazuki Shibasaki, Yu-I Hsu, Hiroshi Uyama","doi":"10.1002/mame.202400137","DOIUrl":"10.1002/mame.202400137","url":null,"abstract":"Petroleum-derived plastics are harmful to ecosystems because they are not decomposed in the natural environment. Therefore, the replacement of petroleum-derived plastics with biodegradable plastics has attracted considerable attention. UV-barrier films in the agricultural and packaging fields are mainly composed of petroleum-derived plastics, which have a negative impact on the ecosystem when they leak into the environment. Thermoplastic starch (TPS) is an inexpensive and sustainable biodegradable plastic that has recently attracted considerable attention. In this study, the addition of UV barrier properties and remolding ability to TPS for replacing petroleum-derived UV barrier films are investigated. Also, a biodegradable polyester coating is studied to improve the water resistance of the prepared UV-barrier TPS (U-TPS). To prepare U-TPS, a conjugated enamine structure is formed by reacting starch acetoacetate with diamine monomers during melt kneading. U-TPS exhibits high UV barrier properties across the UV regions (200–400 nm) owing to the presence of acetoacetyl groups and enamines. These results indicate the possibility of increasing the utilization of TPS in agriculture and as a packaging material.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 10","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400137","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141340918","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}

引用次数: 0

Investigating the Effect of ABS on the Mechanical Properties, Morphology, Printability, and 4D Printing of PETG-ABS Blends 研究 ABS 对 PETG-ABS 混合物的机械性能、形态、可印刷性和 4D 印刷的影响

IF 3.9 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-06-14 DOI: 10.1002/mame.202470011

Kiandokht Mirasadi, Davood Rahmatabadi, Ismaeil Ghasemi, Mohammad Khodaei, Majid Baniassadi, Mostafa Baghani

引用次数: 0

Masthead: Macromol. Mater. Eng. 6/2024 刊头：Macromol.Mater.Eng.6/2024

IF 3.9 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-06-14 DOI: 10.1002/mame.202470012

引用次数: 0

4D Printing of Magneto-Thermo-Responsive PLA/PMMA/Fe3O4 Nanocomposites with Superior Shape Memory and Remote Actuation 具有优异形状记忆和远程致动功能的磁性热响应聚乳酸/PMMA/Fe3O4 纳米复合材料的 4D 打印技术

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-06-12 DOI: 10.1002/mame.202400090

Hossein Doostmohammadi, Majid Baniassadi, Mahdi Bodaghi, Mostafa Baghani

{"title":"4D Printing of Magneto-Thermo-Responsive PLA/PMMA/Fe3O4 Nanocomposites with Superior Shape Memory and Remote Actuation","authors":"Hossein Doostmohammadi, Majid Baniassadi, Mahdi Bodaghi, Mostafa Baghani","doi":"10.1002/mame.202400090","DOIUrl":"10.1002/mame.202400090","url":null,"abstract":"This study presents the development and 4D printing of magnetic shape memory polymers (MSMPs) utilizing a composite of polylactic acid (PLA), polymethyl methacrylate (PMMA), and Fe3O4 nanoparticles. The dynamic mechanical analysis reveals that the integration of Fe3O4 maintains the broad thermal transition without significantly affecting α-relaxation time, indicating high compatibility and homogeneous distribution of the nanoparticles within the polymer matrix. Field emission scanning electron microscopy further confirms the high compatibility of PLA and PMMA phases as well as uniform dispersion of Fe3O4 nanoparticles, essential for the effective transfer of heat during the shape memory process. Significantly, the incorporation of magnetic nanoparticles enables remote actuation capabilities, presenting a substantial advancement for biomedical applications. 4D-printed MSMP nanocomposites exhibit exceptional mechanical properties and rapid, efficient shape memory responses under both inductive and direct heating stimuli, achieving 100% shape fixity and 100% recovery within ≈85 s. They are proposed as promising candidates for biomedical implants, specifically for minimally invasive implantation of bone scaffolds, due to their rapid remote actuation, biocompatibility, and mechanical robustness. This research not only demonstrates the 4D printability of high-performance MSMPs but also introduces new possibilities for the application of MSMPs in regenerative medicine.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 9","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400090","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141352068","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}

引用次数: 0

Structural Characteristics of Fibrillar Crystals in Uniaxially Stretched Isotactic Polypropylene Dominated by Temperature and Strain 受温度和应变影响的单轴拉伸同素异形聚丙烯纤维状晶体的结构特征

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-06-11 DOI: 10.1002/mame.202300448

Hao Lin, Jiang Guo, Xiang Huang, Shengbao Jiang, Mengyi Xu

{"title":"Structural Characteristics of Fibrillar Crystals in Uniaxially Stretched Isotactic Polypropylene Dominated by Temperature and Strain","authors":"Hao Lin, Jiang Guo, Xiang Huang, Shengbao Jiang, Mengyi Xu","doi":"10.1002/mame.202300448","DOIUrl":"10.1002/mame.202300448","url":null,"abstract":"The spherulitic morphology of isotactic polypropylene can be transformed into the oriented fibrillar morphology through hot stretching processes with varying temperature (Ts) or altering strain (εt). The effects of Ts and εt on the structural characteristics of fibrillar crystals are comprehensively investigated with respect to crystal orientation, long periodic spacing, lamellar thickness (Lc), crystallinity (Xc), melting point, and chain relaxation behavior. Small-angle X-ray scattering patterns illustrate that the fibrillar crystals consist of alternated stacks of crystalline lamellae and amorphous layers. High Ts leads to a low orientation degree of lamellae, whereas large εt facilitates a high orientation level. The Xc and mean Lc are improved continuously with the increasing of Ts or εt, indicating a stretching-enhanced crystallization behavior driven by the two factors. The endothermic profiles reveal that new chain-folded lamellae with relatively thinner thickness form during the hot stretching process. The formation of thinner lamellae is dominated by the melting–recrystallization mechanism. This work would provide guidance for optimizing process conditions to manipulate the microstructure of hot-stretched semicrystalline polymers.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 11","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202300448","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141356429","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}

引用次数: 0

Physical Modifications of Kombucha-Derived Bacterial Nanocellulose: Toward a Functional Bionanocomposite Platform 昆布发酵的细菌纳米纤维素的物理改性：打造功能性仿生复合材料平台

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-06-03 DOI: 10.1002/mame.202400041

Meruyert Imanbekova, Reza Abbasi, Xinyue Hu, Mohul Sharma, Marion Vandewynckele-Bossut, Rupa Haldavnekar, Sebastian Wachsmann-Hogiu

{"title":"Physical Modifications of Kombucha-Derived Bacterial Nanocellulose: Toward a Functional Bionanocomposite Platform","authors":"Meruyert Imanbekova, Reza Abbasi, Xinyue Hu, Mohul Sharma, Marion Vandewynckele-Bossut, Rupa Haldavnekar, Sebastian Wachsmann-Hogiu","doi":"10.1002/mame.202400041","DOIUrl":"10.1002/mame.202400041","url":null,"abstract":"Sustainable functionalization of bacterial cellulose for cost-effective bionanocomposites with desired properties has received growing attention in recent years. This article presents the results of work aimed at obtaining bionanocomposite materials based on bacterial cellulose, a natural and eco-friendly material. Bacterial cellulose obtained from the Kombucha symbiotic culture of bacteria and yeast (SCOBY) fermentation process is functionalized by embedding with diatom frustules, silver nanoparticles (AgNPs), and poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS). The effects of functionalization on mechanical, optical, plasmonic, electrical, chemiluminescent, and antimicrobial properties are evaluated. Morphological characteristics of the nanocomposites are studied using electron microscopy. Addition of diatom frustules introduced into the SCOBY culture media results in bionanocomposite materials with enhanced tensile strength and increased ultraviolet (UV) blockage properties. In situ functionalization of bacterial cellulose with AgNPs tunes plasmonic and chemiluminescent properties, revealing the biosensing potential of the material. Modified bacterial cellulose shows antimicrobial activity in experiments with gram-positive and gram-negative bacteria. Dual functionalization of bacterial cellulose with PEDOT:PSS and AgNPs results in improved electrical conductivity of the bionanocomposite. Overall, bottom-up physical functionalization approaches and the resulting bionanocomposite materials will open up new opportunities for the low-cost production of green materials and contribute to the development of a sustainable economy.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 10","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400041","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141271370","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}

引用次数: 0

Potential of Date Palm Fibers (DPFs) as a Sustainable Reinforcement for Bio- Composites and its Property Enhancement for Key Applications: A Review 枣椰树纤维 (DPF) 作为生物复合材料可持续增强材料的潜力及其在关键应用领域的性能提升：综述

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-05-30 DOI: 10.1002/mame.202400081

Hom N. Dhakal, Sakib Hossain Khan, Ibrahim A. Alnaser, Mohammad Rezaul Karim, Abu Saifullah, Zhongyi Zhang

{"title":"Potential of Date Palm Fibers (DPFs) as a Sustainable Reinforcement for Bio- Composites and its Property Enhancement for Key Applications: A Review","authors":"Hom N. Dhakal, Sakib Hossain Khan, Ibrahim A. Alnaser, Mohammad Rezaul Karim, Abu Saifullah, Zhongyi Zhang","doi":"10.1002/mame.202400081","DOIUrl":"10.1002/mame.202400081","url":null,"abstract":"This article presents a comprehensive review of the advancements in the use of Date Palm Fiber (DPF) reinforced composites, highlighting their mechanical, thermal, and morphological properties and the enhancements achieved through various modification techniques. Date palm fibers, a sustainable and biodegradable resource, have garnered significant interest due to their potential in reducing environmental impact across several key industries, including building and construction, automotive, and packaging. The review discusses the effects of hybrid approaches and physical and chemical treatments on the mechanical properties of DPF composites, demonstrating improvements in tensile strength, elasticity, and flexural strength through optimized fiber-matrix bonding and reduced moisture absorption. Thermal behavior analyses through Thermogravimetric Analysis (TGA), Dynamic Mechanical Analysis (DMA), and thermal conductivity underscore the composites’ suitability for applications requiring high thermal stability and conductivity for insulation applications. Morphological studies reveal that surface-treated fibers integrate more effectively with various polymeric matrices, leading to enhanced composite performance. The practical applications of DPF composites are explored, emphasizing their role in promoting sustainable manufacturing practices. Challenges such as scalability, cost-efficiency, and performance consistency are addressed, alongside future perspectives that suggest a promising direction for further research and technological development in the field of natural fiber composites. This review aims to solidify the foundation for ongoing advancements and increase the adoption of DPF composites in commercial applications.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 10","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400081","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141193804","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}

引用次数: 0