Macromolecular Materials and Engineering最新文献

{"title":"High Curvature of Polymer-Based Miniaturized Flexible Actuator at Very Low Electric Field","authors":"Simon Toinet,&nbsp;Mohammed Benwadih,&nbsp;Helga Szambolics,&nbsp;Sylvain Minot,&nbsp;Christine Revenant,&nbsp;Marine Bordet,&nbsp;Nellie Della Schiava,&nbsp;Minh-Quyen Le,&nbsp;Pierre-Jean Cottinet","doi":"10.1002/mame.202400132","DOIUrl":"10.1002/mame.202400132","url":null,"abstract":"<p>The use of high electric fields, as well as pre-stressing, are the two main obstacles to the widespread use of poly(vinylidene fluoride (PVDF)-based actuators. In response, a new double-sided multilayer device has been developed which, coupled with a polarization procedure, enables high bending performance at low voltages. The actuator's symmetry allows zero bending at rest, while the high number of layers enables a strong field to be maintained while reducing the applied voltage. X-ray and permittivity studies reveal the ultimate links between the microscopic material displacement and the actuator deflection. These results, coupled with the analytical model developed in this work, demonstrate that the optimization of complex multilayer systems requires a detailed understanding of mechanics, design, and microstructure. Experimental, analytical and finite element results confirm that such a double-sided multilayer actuator is of 50% more efficient than a conventional single-sided actuator, up to 40 V µm⁻¹. These achievements open up new prospects for PVDF-based actuators in application of healthcare, such as arterial navigation.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 11","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.202400132","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141743907","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":"Phosphorus and Silicon Modified Alginate as an Efficient Flame Retardant for Poly(lactic acid)","authors":"Kata Enikő Decsov,&nbsp;Viktória Cserni,&nbsp;Beáta Szolnoki,&nbsp;Olga Krafcsik,&nbsp;Katalin Bocz","doi":"10.1002/mame.202400194","DOIUrl":"10.1002/mame.202400194","url":null,"abstract":"<p>The introduction of biobased carbon sources in intumescent flame retardant formulations is extensively explored, particularly for biopolymers such as poly(lactic acid) (PLA). In this work, the flame retardant efficiency of alginate, a favorable renewable charring agent candidate, is enhanced by chemical modification with a phosphorus- and silicon-containing compound and subsequent coagulation in the presence of Ca²⁺ ions. The simultaneous presence of P and Si atoms in the reactive compound is shown to be an effective way to avoid thermal stability issues related to the biobased carbohydrate. The newly synthesized PSilAlg additive boosts the flame-retardant effectiveness of ammonium-polyphosphate (APP) at low loadings. Adding 5 wt% PSilAlg to 15 wt% APP containing PLA composite increases the limiting oxygen index from 26.0 to 34.0 vol% and decreases the total heat emission during combustion by 46%, accompanied by significantly (by 66%) reduced smoke production. The outstanding flame retardant performance of PSilAlg is attributed to the high amount and thermally stable carbonaceous fire-protecting layer that forms as a result of the enhanced charring, catalyzed by the high oxidation state P, and the strengthening mechanism of inorganic silicates and calcium salts.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 12","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.202400194","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141743908","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":"Mechanical, Thermal and Morphological Characterization of Graphene/Al2O3-Reinforced Epoxy Hybrid Nanocomposites","authors":"Shah Md Ashiquzzaman Nipu,&nbsp;Md Zillur Rahman,&nbsp;Shadman Sharar Alam,&nbsp;Barshan Dev","doi":"10.1002/mame.202400180","DOIUrl":"10.1002/mame.202400180","url":null,"abstract":"<p>This work investigates the hybrid nanocomposites manufactured by direct mixing by dispersing varying weight percentages (wt.%) of graphene nanoparticles (GNPs) and Al₂O₃ NPs in epoxy resin. Their properties are then obtained using various mechanical (tensile, flexural, impact, and hardness) and thermal (thermogravimetric) analyses. Furthermore, their microstructure and functional groups are studied by SEM and FTIR, respectively. The hybrid nanocomposite, which contains 1.5 wt.% GNPs and 8.5 wt.% Al₂O₃ NPs, has excellent mechanical properties. Compared to a composite without GNPs, the tensile strength, flexural strength, impact strength, and shore D hardness improve by 95.12, 90.01, 171.43, and 19.75%, respectively. It is also found that hybrid nanocomposite exhibits enhanced thermal stability as GNPs increase, particularly at lower wt.% of Al₂O₃. The SEM of tensile fractured specimens of GNPs/Al₂O₃ epoxy hybrid nanocomposites reveals prominent failure mechanisms, including agglomeration of GNPs and debonding between the GNPs/Al₂O₃ and epoxy. The FTIR spectroscopy analysis reveals distinctive spectral peaks indicating successful incorporation of Al₂O₃ and GNPs into the epoxy-based composite, with observed peaks corresponding to functional groups and bonds characteristic of each component. These findings suggest that the manufactured nanocomposite holds promise as a component in structural applications, particularly in automobiles, aerospace components, and sports equipment.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 12","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400180","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141743909","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":"Quantification of Airborne Concentrations of Nanoscale Dusts by Particle Gravimetry Using Ionic-Liquid Modified Polymeric Electrospun Fibers","authors":"Zeki Tok,&nbsp;Kadriye Ertekin","doi":"10.1002/mame.202470013","DOIUrl":"https://doi.org/10.1002/mame.202470013","url":null,"abstract":"<p><b>Front Cover</b>: In this study, nanoparticle dust filters are prepared by electrospinning method by mixing different polymers or polymer blends with ionic liquids. The performance of the filters is evaluated using a sensitive gravimetric method. CTAB modified chitosan fibers retain 96.37 and 96.64 % of Fe₂O₃ and ZnO nanoparticles. More details can be found in article 2400062 by Zeki Tok and Kadriye Ertekin.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 7","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202470013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141624508","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":"Effect of Fluorine and Copper Ions on Liquid-Solid Triboelectric Nanogenerator","authors":"Mohamed Salman,&nbsp;Vladislav Sorokin,&nbsp;Zifan Li,&nbsp;Yuting Zhu,&nbsp;Wee Chen Gan,&nbsp;Kean Aw","doi":"10.1002/mame.202400159","DOIUrl":"10.1002/mame.202400159","url":null,"abstract":"<p>Liquid-solid triboelectric nanogenerator (LS-TENG) harvests energy efficiently while eliminating wear issues associated with solid-solid TENG. However, the effect of ions or charges in the liquid on output performance needs further examination. In this work, the impact of fluorine and copper ions introduced through deionized water with sodium fluoride (DI-NaF) and deionized water with copper sulfate (DI-CuSO₄) solution on the output voltage, charge and current of a tubular LS-TENG with polytetrafluoroethylene (PTFE) and Nylon as solid materials is examined. The results indicate that fluorine and copper ions have opposite effects on PTFE and Nylon LS-TENG's output. The fluorine (F⁻) ions enhance the triboelectric effect and charge transfer in Nylon LS-TENG, increasing output, while they hinder the charge transfer process in PTFE LS-TENG, consequently decreasing its output. Conversely, the copper (Cu²⁺) ions have a positive effect on the output of PTFE LS-TENG and a detrimental effect on Nylon LS-TENG's output. Moreover, the results indicate that LS TENG's output performance depends on the charges of solid and liquid triboelectric materials. Thus, this study provides insights into material-ion interaction in LS-TENG and underscores the importance of triboelectric material selection for optimizing output performance.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 12","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400159","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141648240","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":"Electrospun Polymeric Nanofibers for Malaria Control: Advances in Slow-Release Mosquito Repellent Technology","authors":"António Benjamim Mapossa,&nbsp;Afonso Henrique da Silva Júnior,&nbsp;Washington Mhike,&nbsp;Uttandaraman Sundararaj,&nbsp;Carlos Rafael Silva de Oliveira","doi":"10.1002/mame.202400130","DOIUrl":"10.1002/mame.202400130","url":null,"abstract":"<p>The textile industry comprises technologies that transform synthetic or natural fibers into yarn, cloth, and felt for manufacturing clothing, upholstery, and household linens. The major public health threat in tropical and subtropical countries is mosquito-borne malaria. Nowadays, the demand for insect repellent-based textiles is continuously rising, as they are used for protection against diseases transmitted by mosquitoes. The present work reviews studies on the fabrication of insect repellent containing electrospun polymeric nanofibers as principal tools for protecting people against mosquito bites. Electrospinning technology is a remarkably facile technique for fabricating polymeric nanofiber devices. The technique is outlined and elucidated. The performance of insect repellent-based polymeric nanofibers against mosquitoes is carefully reported and comprehensively reviewed in-depth. Furthermore, the progress made on the mathematical modeling of the release rate of repellents through polymeric nanofiber devices is reviewed. The reviewed studies demonstrate that repellents can be released slowly from electrospun nanofibers, increasing the product's protection period against insects. The reviewed works suggest that electrospinning technology has led to an effective and facile methodology for fabricating functional nanofiber textiles with insect repellent. The reviewed studies showed that product-based repellents can be effective not only against malaria but also against other mosquito-borne diseases.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 8","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400130","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141646290","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":"Masthead: Macromol. Mater. Eng. 7/2024","authors":"","doi":"10.1002/mame.202470014","DOIUrl":"https://doi.org/10.1002/mame.202470014","url":null,"abstract":"","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 7","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202470014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141624509","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 Low-Alcohol Beer Production by Combination of Membrane Osmotic Distillation and Pervaporation","authors":"Javier Esteras-Saz,&nbsp;Amina Maach,&nbsp;Óscar de la Iglesia,&nbsp;Antonio J. Fumanal,&nbsp;Izumi Kumakiri,&nbsp;Carlos Téllez,&nbsp;Joaquín Coronas","doi":"10.1002/mame.202400079","DOIUrl":"10.1002/mame.202400079","url":null,"abstract":"<p>Membrane osmotic distillation (OD) is applied in this work for the partial dealcoholization of beer (5.2 v/v% alcohol content) to diminish its ethanol content by around 50% giving rise to a low alcohol beer. A compromise is sought between the low alcoholic degree achieved and beer sensory properties. Moreover, the feasibility of the membrane OD process intensification is studied thanks to its combination with membrane pervaporation (PV). Two successive PV stages, one hydrophobic and the other hydrophilic, allow the production of recycled water (with less than 0.5 wt% ethanol) for the membrane OD operation and bioethanol (99% ethanol) as valuable byproduct.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 10","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400079","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141646858","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":"Correction to “Roles of Chain Architecture and Polymorphic Form in Tailoring the Properties of Surface-Roughened Biaxially Oriented Polypropylene Films for Capacitors”","authors":"Jinqing Wang,&nbsp;Cheng Yao,&nbsp;Xinghua Huang,&nbsp;Qin Zhang,&nbsp;Ke Wang","doi":"10.1002/mame.202400233","DOIUrl":"10.1002/mame.202400233","url":null,"abstract":"<p><i>Macromol. Mater. Eng</i>. <b>2024</b>, <i>309</i>, 2300273</p><p>In the list of authors at the beginning of the article, we misspelled the name of the first author as “Jinqin Wang”, which is incorrect.</p><p>The correct spelling should be “Jinqing Wang”.</p><p>We apologize for this error.</p><p>The first author's first name has been corrected in the article itself: https://doi.org/10.1002/mame.202300273</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 10","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400233","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141615035","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":"Polymer Science in South Africa","authors":"Rueben Pfukwa,&nbsp;Suprakas Sinha Ray","doi":"10.1002/mame.202400240","DOIUrl":"10.1002/mame.202400240","url":null,"abstract":"&lt;p&gt;Polymer science and technology now impact all spheres of this age's everyday life, from packaging, water purification materials, health, agriculture, transport and electronics. The wide applicability of polymers leverages the unique physicochemical properties of these macromolecules, the vast array of available building blocks and a stocked synthetic toolbox for accessing polymers with differing functionalities, topologies and architectures. Polymer science is a mature field, with a unique balance between fundamental research and applied science, and a significant involvement of commercial companies. The polymer industry is an important cornerstone of South Africa's highly diverse and complex chemical industry.&lt;sup&gt;[&lt;/sup&gt;&lt;span&gt;&lt;sup&gt;1&lt;/sup&gt;&lt;/span&gt;&lt;sup&gt;]&lt;/sup&gt; In addition, South Africa has fairly comprehensive polymer science teaching and research programs.&lt;sup&gt;[&lt;/sup&gt;&lt;span&gt;&lt;sup&gt;2&lt;/sup&gt;&lt;/span&gt;&lt;sup&gt;]&lt;/sup&gt; This special issue, “Polymer Science in South Africa” comprises 16 open access research articles, i.e., 10 experimental papers and 6 review articles from the South African polymer science community. Research areas covered include polymer analysis, polymer engineering, materials for health and biotechnology, degradable polymers and environmental impacts of polymers materials; these contributions are summarized below.&lt;/p&gt;&lt;p&gt;Advances made in the analysis of complex polymers are summarised in Pasch's review article (mame.202300354), shedding light on challenges encountered in polymer analysis due to their heterogeneity in molar mass, end-group functionality, microstructure and topology. This contribution contains a significant amount of research work sponsored by SASOL, highlighting an important synergy between industry and academia in South Africa. Van Reenen and co-workers (mame.202300372) investigated the applicability of solid state NMR spectroscopy in determining the oil content of commercial waxes, in order to help the industry develop alternative approaches for assessing the quality of waxes. Mhlabeni et al. (mame.202300125) also investigated the phase behaviour of blends comprised of Fischer-Tropsch wax and linear low density polyethylene and found that the two were fully miscible in the melt and partially cocrystallized in the solid state. The review by Orasugh and co-workers (mame.202400104) highlights the development of flame-retardant polyethylene composites from processing to final materials.&lt;/p&gt;&lt;p&gt;Polymers have numerous biomedical applications, such as tissue engineering scaffolds, wound dressing devices, drug delivery materials, medical implants, biosensors, and filtration devices. Motloung et. al., (mame.202300457) developed a smart hybrid gel with tuneable mechanics and de-swelling kinetics, as well as excellent injectability and self-healing capabilities, suitable for application in biomedicine. Mhike and co-workers (mame.202400130) reviewed advances in the use of electrospun polymeric nanofibers in controlled release devices for","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 8","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400240","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141611076","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}