Macromolecular Materials and Engineering最新文献_第7页

Evolution of Electrothermal Heating and Dielectric Properties of Phenolic Resins During Pyrolysis 酚醛树脂热解过程中电热加热及介电性能的演变

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-11-26 DOI: 10.1002/mame.202400311

Aniela J. K. Wright, Smita S. Dasari, Ramu Banavath, Sayyam Deshpande, Ethan M. Harkin, Kailash Arole, Anubhav Sarmah, Micah J. Green

{"title":"Evolution of Electrothermal Heating and Dielectric Properties of Phenolic Resins During Pyrolysis","authors":"Aniela J. K. Wright, Smita S. Dasari, Ramu Banavath, Sayyam Deshpande, Ethan M. Harkin, Kailash Arole, Anubhav Sarmah, Micah J. Green","doi":"10.1002/mame.202400311","DOIUrl":"https://doi.org/10.1002/mame.202400311","url":null,"abstract":"Electrothermal heating generated via radio frequency (RF) fields is used to probe the transformation of phenolic resin to a carbon matrix during pyrolysis. Phenolic resin is a single-stage thermoset that is popular due to its heat resistance, chemical resistance, high strength, and low creep properties. When phenolic resin is subjected to high-temperature, low-oxygen treatment (pyrolysis), it is converted to a carbon material useful for many structural applications. Here, neat phenolic resin is pyrolyzed at different temperatures, and the heating response of the newly formed carbon material is tracked when exposed to an RF field. The electrical conductivity of the matrix increased with increasing pyrolysis temperature, with ≈10−4 S m−1 for the neat sample prior to pyrolysis, and ≈102 S m−1 for the sample pyrolyzed at 850 °C. The material's electrothermal response to applied RF fields increases as the material pyrolyzes and becomes conductive; however, at high pyrolysis temperatures, the material becomes sufficiently conductive such that the RF fields are reflected rather than absorbed, and the heating response decreases. The findings of this work show that heating response to RF fields can be used as a quick and easy characterization technique for tracking structural changes associated with phenolic pyrolysis.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 3","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400311","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602444","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

Skin-Compatible Carbopol Electrospun Fiber Membranes with pH-Dependent Rheological Properties for Biomedical Applications 生物医学应用中具有ph依赖性流变特性的皮肤相容性卡波波尔静电纺丝纤维膜

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-11-23 DOI: 10.1002/mame.202400335

Daewoo Han, Robert Horvath, Burcu Uner, Giovanni M. Pauletti, Andrew J. Steckl

{"title":"Skin-Compatible Carbopol Electrospun Fiber Membranes with pH-Dependent Rheological Properties for Biomedical Applications","authors":"Daewoo Han, Robert Horvath, Burcu Uner, Giovanni M. Pauletti, Andrew J. Steckl","doi":"10.1002/mame.202400335","DOIUrl":"https://doi.org/10.1002/mame.202400335","url":null,"abstract":"Properties of pH-responsive electrospun nanofibers incorporated with biocompatible/degradable Carbopol, commonly used in pharmaceuticals and personal care products, are reported. Sonication of Carbopol dispersions prior to electrospinning leads to uniform incorporation into fibers of the host polymer polyvinylpyrrolidone. The hydration behavior is strongly influenced by pH conditions, forming a viscous network at higher pH. Since Carbopol is more responsive to higher pH, at pH > 6 increasing Carbopol concentration leads to increased uptake volume of buffer solution, faster uptake rate and complete gel formation. The physical spreadability (resulting from a combination of viscoelastic properties and the structural polymer network) of the hydrated fibers is evaluated for multiple Carbopol concentrations and pH conditions. At low starting pH of 4, increasing the Carbopol amount results in slightly increasing viscosity while maintain solution pH. On the other hand, at high starting pH of 8 increasing Carbopol concentrations result in significant reduction in the pH of the buffer solution, which in turn decreases the viscosity of the gel and increases its spreadability. These findings provide guidelines for rational designs of pH responsive Carbopol fibers for various applications, including drug delivery, wound dressing, contraceptive devices, and prevention of sexually transmitted diseases.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 3","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400335","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602808","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

Temperature Sensitive Pluronic F127-Based Gels Incorporating Natural Therapeutic Agents 含天然治疗剂的温度敏感Pluronic f127凝胶

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-11-23 DOI: 10.1002/mame.202400341

Alexandra Lupu, Maria Bercea, Mihaela Avadanei, Luiza Madalina Gradinaru, Loredana Elena Nita, Vasile Robert Gradinaru

{"title":"Temperature Sensitive Pluronic F127-Based Gels Incorporating Natural Therapeutic Agents","authors":"Alexandra Lupu, Maria Bercea, Mihaela Avadanei, Luiza Madalina Gradinaru, Loredana Elena Nita, Vasile Robert Gradinaru","doi":"10.1002/mame.202400341","DOIUrl":"https://doi.org/10.1002/mame.202400341","url":null,"abstract":"Pluronic F127 copolymer is used as the main component to design injectable gels for therapeutic applications. Xanthan gum is added as an excipient to improve gel properties under physiological conditions. A polyphenol bioactive compound, curcumin, is selected as therapeutic agent with beneficial effects on metabolism and many diseases. The encapsulation efficiency and stability of formulations are investigated in an aqueous environment and in acetic acid solutions. The interactions between the hydrophobic polyphenol and the polymer matrix are investigated through rheology, DLS, and FTIR spectroscopy. The viscoelasticity of gels, correlated with the network structure, is influenced by xanthan gum or acetic acid addition. FTIR analysis of curcumin incorporated into the gel provides the evidence for interaction of the phenyl rings of both keto-enol and di-keto tautomers with the polymeric matrix. The spherical curcumin-encapsulated micelles provided antioxidant properties. The kinetics of curcumin release from the Pluronic F127-based gels suggests anomalous transport phenomena controlled by diffusion through the network and hydrodynamic effects. Both gel and lyophilized form of micellar encapsulated curcumin composites exhibited good stability for long-term storage under ambient conditions.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 4","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400341","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143831419","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

Utilization of Ultrasonication as a Method of Reducing Organic and Inorganic Contamination in Post-Consumer Plastic Film Waste 利用超声波法降低消费后塑料薄膜废弃物中有机和无机污染

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-11-23 DOI: 10.1002/mame.202400310

Victor S. Cecon, Mita Munshi, Shahnaz Mukta, Keith L. Vorst, Greg W. Curtzwiler

{"title":"Utilization of Ultrasonication as a Method of Reducing Organic and Inorganic Contamination in Post-Consumer Plastic Film Waste","authors":"Victor S. Cecon, Mita Munshi, Shahnaz Mukta, Keith L. Vorst, Greg W. Curtzwiler","doi":"10.1002/mame.202400310","DOIUrl":"https://doi.org/10.1002/mame.202400310","url":null,"abstract":"Post-consumer plastic film waste often carries organic and inorganic contaminants that challenge recycling processes and affect the quality of recycled products. An effective contaminant removal procedure through washing such single-used plastic films (SUPFs) can address environmental and waste management concerns. This study compares the efficiency of different washing techniques in reducing SUPF contamination. To evaluate the efficacy of each washing technique, film samples collected from material recovery facilities are individually exposed to friction, ultrasonic-assisted, and a combination of both washes. Thermal analysis indicates that the polymers' melting temperature, crystallization temperature, and crystallinity remain unaffected by the washing methods, demonstrating method aptness. Confocal laser scanning microscope images show that washing results in a cleaner sample surface. 91% ash reduction during the combined wash treatment indicates a high method efficiency compared to the individual friction and ultrasonic wash procedures. This is further validated by reducing characteristic contaminant IR bands (3600–3000, 1750–1600, and 1100–1000 cm−1). Elements of concern such as Cd, Cr, Hg, and Pb in SUPFs after each washing technique applied conform with regulations (<100 ppm) for packaging products. This research shows the novel ultrasonic washing reduces more contamination than friction with shorter wash times and no surfactants.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 5","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400310","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074678","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

Low-Cost Lightweight Quartz Fiber-Reinforced Hybrid Aerogel Nanocomposite for High-Temperature Oxidation Thermal Protection 低成本轻质石英纤维增强混合气凝胶纳米复合材料用于高温氧化热防护

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-11-22 DOI: 10.1002/mame.202400291

Jinming Wang, Honglin Hu, Yunhua Yang, Junning Li, Qiong Geng, Shipeng Zhu, Jiao Yan

{"title":"Low-Cost Lightweight Quartz Fiber-Reinforced Hybrid Aerogel Nanocomposite for High-Temperature Oxidation Thermal Protection","authors":"Jinming Wang, Honglin Hu, Yunhua Yang, Junning Li, Qiong Geng, Shipeng Zhu, Jiao Yan","doi":"10.1002/mame.202400291","DOIUrl":"https://doi.org/10.1002/mame.202400291","url":null,"abstract":"Aerogels are used to achieve lightweight heat insulation in composites. To minimize cost and ensure safety, nanocomposites must be prepared without flammable or explosive solvents at room temperature and ambient-pressure drying. However, fabricating resin aerogel nanocomposites is challenging due to the tendency of porous structures to collapse owing to the complex surface tension in the multiphase system of fibers, resin particles, and solvent. A novel quartz fiber-reinforced hybrid aerogel nanocomposite is successfully prepared using the sol–gel method with self-assembly template polymerization. Two key factors in preventing aerogel collapse include the use of a cationic surfactant as a stabilizer for the initial template and as a surface tension improver during drying. The nanocomposite, with a density of 0.52 g·cm−3 and thermal conductivity of 0.046 W·m−1·K−1, exhibited a back-face temperature rise of ≈96.4 °C after a 1500 s arc-wind tunnel ablation test. The maximum ablation retreat is ≈0.26 mm. This novel nanocomposite shows potential for high-temperature protection systems in extreme oxidation environments.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 3","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400291","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602704","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

Rhodamine B-Modified Nanocrystalline Cellulose as Fluorescent Sensor for Fe3+ Ion Detection 罗丹明b修饰纳米晶纤维素作为荧光传感器检测Fe3+离子

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-11-20 DOI: 10.1002/mame.202400285

Marzieh Golshan, Behnam Gheitarani, Seyedeh-Arefeh Safavi-Mirmahalleh, Mehdi Salami-Kalajahi

{"title":"Rhodamine B-Modified Nanocrystalline Cellulose as Fluorescent Sensor for Fe3+ Ion Detection","authors":"Marzieh Golshan, Behnam Gheitarani, Seyedeh-Arefeh Safavi-Mirmahalleh, Mehdi Salami-Kalajahi","doi":"10.1002/mame.202400285","DOIUrl":"https://doi.org/10.1002/mame.202400285","url":null,"abstract":"Iron is crucial for various biological processes in humans, animals, and plants, making precise and efficient monitoring of iron ion concentrations essential. To address this need, a cellulose-based smart fluorescent material (NCC@NH2@RB) with a conjugated structure is designed and synthesized for the rapid and sensitive detection of Fe3+ ions. This sensor features core-shell nanoparticles functionalized with rhodamine B (RB), using (3-aminopropyl)triethoxysilane (APTES) as a linker. The resulting fluorescent probe, composed of nanocrystalline cellulose and RB, exhibits strong fluorescence under ultraviolet light, making it an effective tool for Fe3+ ion detection in water. When Fe3+ ions are introduced into a solution containing NCC@NH2@RB, they bind with weak-field ligands such as nitrogen and oxygen in the probe's structure, forming complexes. This interaction involves high-spin coordination and leads to the self-assembly of Fe3+ ions on the surface of NCC@NH2@RB. The process generates single electrons, increasing paramagnetism and quenching the fluorescence. The NCC@NH2@RB fluorescent probe has a limit of detection (LOD) of 0.01 µM and a limit of quantification (LOQ) of 0.03 µM with linearity at concentrations of 1.0 × 10−4–2.5 × 10−3 m. This fluorescence quenching effect is specific to Fe3+ ions, ensuring that the probe remains unaffected by other metal ions.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 2","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400285","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404814","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

Electroplating on Electrically Conductive Filaments for Additive Manufacturing 用于增材制造的导电细丝电镀

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-11-19 DOI: 10.1002/mame.202400272

Claudia Eßbach, Wolfgang Förster, Dirk Fischer, Dagmar Dietrich, Peter Neumann, Daniela Nickel

引用次数: 0

Plasma Carbonization of Sustainable Lignin Fiber-Derived Papers for Supercapacitor Electrodes 超级电容器电极用可持续木质素纤维基纸的等离子体炭化

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-11-18 DOI: 10.1002/mame.202400336

Philipp A. Schuster, Chinmaya Mirle, Lisa Kuske, Frank Schmidt, Michael R. Buchmeiser, Felix Rohrbach, Joachim Bansmann, Stefan Terbrack, Holger Heuermann, Erik Frank, Alexander J. C. Kuehne

{"title":"Plasma Carbonization of Sustainable Lignin Fiber-Derived Papers for Supercapacitor Electrodes","authors":"Philipp A. Schuster, Chinmaya Mirle, Lisa Kuske, Frank Schmidt, Michael R. Buchmeiser, Felix Rohrbach, Joachim Bansmann, Stefan Terbrack, Holger Heuermann, Erik Frank, Alexander J. C. Kuehne","doi":"10.1002/mame.202400336","DOIUrl":"https://doi.org/10.1002/mame.202400336","url":null,"abstract":"The majority of carbon materials on the market are produced from polyacrylonitrile precursor fibers using high-temperature oven processes. Despite approaches for green carbon fiber precursors, current stabilization and carbonization processes require large amounts of energy and render carbon materials costly and environmentally not sustainable. Here, a plasma carbonization treatment is employed for papers made from lignin/polyvinylpyrrolidone precursor fibers. The process provides carbonization within a timeframe of a few seconds, while the degrees of porosity, conductivity, and hydrophobicity can be tuned. It is shown that the properties of these carbonized papers are suitable for application as supercapacitor electrodes with capacitances in the range of 40 mF g−1 with very good cycling stability dropping by less than 20% over 4000 cycles.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 3","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400336","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602762","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

Investigation of Release Kinetics of DOX from Polydopamine Nanocapsules Prepared by Hard Template Method 硬模板法制备聚多巴胺纳米胶囊DOX释放动力学研究

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-11-18 DOI: 10.1002/mame.202400261

Elahe Abdollahi, Vahid Haddadi-Asl, Hanie Ahmadi, Mastoure Shirjandi, Fatemeh Khanipour

{"title":"Investigation of Release Kinetics of DOX from Polydopamine Nanocapsules Prepared by Hard Template Method","authors":"Elahe Abdollahi, Vahid Haddadi-Asl, Hanie Ahmadi, Mastoure Shirjandi, Fatemeh Khanipour","doi":"10.1002/mame.202400261","DOIUrl":"https://doi.org/10.1002/mame.202400261","url":null,"abstract":"Development of smart drug delivery systems (DDSs) for effective delivering drugs to targeted areas and achieving controlled drug release (CDR) is critical for cancer chemotherapy. The purpose of this study is synthesis of polydopamine (PDA) nanocapsules and analyze the adsorption and release properties of doxorubicin (DOX). PDA nanocapsules are manufactured using hard template approach. The influence of various parameters such as pH, adsorption time, and initial DOX content on the adsorption and release process is investigated. The resulting adsorption isotherm is consistent with the Langmuir isotherm, indicating that DOX adsorption on PDA nanocapsules is homogenous, uniform, and monolayer. PDA nanocapsules have an adsorption capacity of 689.6 mg g−1 under alkaline conditions, which is attributed to phenol group deprotonation mechanism and electrostatic repulsion. The adsorption kinetics are more consistent with the pseudo-second-order model. Furthermore, raising initial concentration of DOX results in a greatly increased adsorption capacity due to a larger driving force. Among the several parameters that can influence the pace and degree of DOX loading and release, local pH is regarded as a significant environmental component in the processes. Thus, pH-responsive PDA nanocapsules have a significant potential for usage in locations with aberrant pH level, such as cancer tissue.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400261","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143116072","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

Masthead: Macromol. Mater. Eng. 11/2024 刊头：Macromol.Mater.Eng.11/2024

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-11-15 DOI: 10.1002/mame.202470022

引用次数: 0