Advanced Engineering Materials最新文献

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Preparation and Properties of High-Temperature-Resistant and Low-Dielectric Constant Silicon-Containing Arylacetylene Resin/SiO2 Syntactic Foams 耐高温、低介电常数含硅芳基乙炔树脂/二氧化硅合成泡沫的制备及其特性
IF 3.4 3区 材料科学
Advanced Engineering Materials Pub Date : 2024-10-25 DOI: 10.1002/adem.202401638
Xuetao Shen, Chaoen Jin, Fan Wang, Yaping Zhu, Shifeng Deng, Huimin Qi
{"title":"Preparation and Properties of High-Temperature-Resistant and Low-Dielectric Constant Silicon-Containing Arylacetylene Resin/SiO2 Syntactic Foams","authors":"Xuetao Shen,&nbsp;Chaoen Jin,&nbsp;Fan Wang,&nbsp;Yaping Zhu,&nbsp;Shifeng Deng,&nbsp;Huimin Qi","doi":"10.1002/adem.202401638","DOIUrl":"https://doi.org/10.1002/adem.202401638","url":null,"abstract":"<p>A silicon-containing arylacetylene resin (PSA)/SiO<sub>2</sub> syntactic foam was prepared through a chemical foaming approach, with PSA serving as the matrix, quartz sand (QS) and nanosilica (nSiO<sub>2</sub>) acting as fillers, and their structures and properties were characterized. The results show that the incorporation of appropriate amounts of QS and nSiO<sub>2</sub> can reduce the cell size and apparent density of the syntactic foam, and improve its heat resistance, dielectric properties and wave transmission properties. The addition of QS can increase the compressive strength of the syntactic foam, while the addition of nSiO<sub>2</sub> decreases the compressive strength. The apparent densities of the PSA/9QS and PSA/9nSiO<sub>2</sub> syntactic foams with 9% filler addition are 0.242 g cm<sup>−3</sup> and 0.157 g cm<sup>−3</sup>, respectively, and the temperatures at 5% weight loss (<i>T</i><sub>d5</sub>) under a nitrogen atmosphere were 692 °C and 658 °C, respectively. The dielectric constants were 1.59 and 1.25, respectively. The wave transmittance within the frequency range of 8.2–12.4 GHz was 98.5% and 96.8%, respectively. PSA/SiO<sub>2</sub> syntactic foam can be used as a lightweight and high-temperature-resistant wave-transmission material in aerospace and other fields.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"26 22","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142674376","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}
引用次数: 0
Metal Replacement in Aeronautics Applications Using Two-Dimensional Multifunctional Composites
IF 3.4 3区 材料科学
Advanced Engineering Materials Pub Date : 2024-10-25 DOI: 10.1002/adem.202401298
Filippo Valorosi, Alessandra Scidà, Sergio Chiodini, Alessandro Kovtun, Francesco Cristiano, Enrico Ferro Demarchi, Vitaliy Parkula, Silvano Favaretto, Loris Giorgini, Francesco Bertocchi, Fabien Dezitter, Elmar Bonaccurso, Andrea Candini, Emanuele Treossi, Vincenzo Palermo
{"title":"Metal Replacement in Aeronautics Applications Using Two-Dimensional Multifunctional Composites","authors":"Filippo Valorosi,&nbsp;Alessandra Scidà,&nbsp;Sergio Chiodini,&nbsp;Alessandro Kovtun,&nbsp;Francesco Cristiano,&nbsp;Enrico Ferro Demarchi,&nbsp;Vitaliy Parkula,&nbsp;Silvano Favaretto,&nbsp;Loris Giorgini,&nbsp;Francesco Bertocchi,&nbsp;Fabien Dezitter,&nbsp;Elmar Bonaccurso,&nbsp;Andrea Candini,&nbsp;Emanuele Treossi,&nbsp;Vincenzo Palermo","doi":"10.1002/adem.202401298","DOIUrl":"https://doi.org/10.1002/adem.202401298","url":null,"abstract":"<p>Carbon-based composites have replaced metals in many structural components of modern airplanes; however, functional applications still require metal conductors and devices. Here, the production and integration in small-scale airplane parts of electric devices based on metal-free layered composites of graphene, boron nitride, and polymers are described. Thanks to their two-dimensional structure, these materials feature excellent tunable thermoelectrical properties and high flexibility. We describe the production and performance of heaters and ice sensors installed on scaled NACA-0012 airfoils to avoid ice formation, to remove ice or to detect the ice on the outer skin of the airfoil. We demonstrate that we can tune the electrical conductivity of the composite heating element from 10<sup>5</sup> to 10<sup>3</sup> S m<sup>−1</sup> that is preserved even after 1000 bending cycles. The heaters successfully achieve anti-icing and deicing in representative icing conditions and can sustain high-power densities as required for electrothermal ice-protection systems in aviation. The composite material can be readapted into a sensor able to detect ice formation in real time in an icing wind tunnel. Moreover, the possibility to use the heaters developed as heating molds to cure composite materials by out-of-oven curing, with a significant energy saving potential, is demonstrated.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"26 24","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adem.202401298","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862242","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
Thermistors Based on Polyethylene Composites with γ-Fe2O3/Multiwalled Carbon Nanotube Hybrid Fillers for Protection of Electronic Circuits 基于聚乙烯复合材料与 γ-Fe2O3/多壁碳纳米管混合填料的热敏电阻,用于保护电子电路
IF 3.4 3区 材料科学
Advanced Engineering Materials Pub Date : 2024-10-25 DOI: 10.1002/adem.202401558
Anastasiia Kobyliukh, Yevgen Mamunya, Marcin Godzierz, Karolina Olszowska, Sławomira Pusz, Marta Musioł, Urszula Szeluga
{"title":"Thermistors Based on Polyethylene Composites with γ-Fe2O3/Multiwalled Carbon Nanotube Hybrid Fillers for Protection of Electronic Circuits","authors":"Anastasiia Kobyliukh,&nbsp;Yevgen Mamunya,&nbsp;Marcin Godzierz,&nbsp;Karolina Olszowska,&nbsp;Sławomira Pusz,&nbsp;Marta Musioł,&nbsp;Urszula Szeluga","doi":"10.1002/adem.202401558","DOIUrl":"https://doi.org/10.1002/adem.202401558","url":null,"abstract":"<p>The objective of this research is to develop and characterize polyethylene composites with randomly and partially oriented hybrid filler (HF) based on multiwalled carbon nanotubes (MWCNTs) decorated with gamma iron (III) oxide (γ<b>-</b>Fe<sub>2</sub>O<sub>3</sub>) nanoparticles (Fe<sub>2</sub>O<sub>3</sub>/MWCNTs). The structure of Fe<sub>2</sub>O<sub>3</sub>/MWCNTs hybrid is determined by X-ray diffraction (XRD), Raman spectroscopy, and microscopy techniques (scanning electron microscopy–energy-dispersive X-ray spectroscopy, transmission electron microscopy). A low-density polyethylene (LDPE) matrix is filled with 5 and 10 vol% HF. The effect of external magnetic field on the distribution of Fe<sub>2</sub>O<sub>3</sub>/MWCNTs in LDPE composites comparing to filler distribution without magnetic field is studied. The XRD and differential scanning calorimetry results confirm an increasing trend in the degree of crystallinity of LDPE matrix with increasing HF content and as an additional result of magnetic field application. The presence of more ordered Fe<sub>2</sub>O<sub>3</sub>/MWCNT particles in the matrix has enhanced the nucleation effect for LDPE crystallization process in composites under magnetic field. The effect of magnetic treatment on thermal, electrical, and thermoresistive properties of HF-LDPE composites is studied. The highest thermoresistive response (723%) and fastest recovery are detected for the HF-LDPE composite with 10 vol% magnetically oriented filler with the perspective to be applied as a critical temperature resistor.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"26 22","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142674377","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}
引用次数: 0
Sintering Behavior and Mechanical Properties of Ti–TiBw Composites Prepared with Pre-alloyed Ti–TiBw Composite Powders 用预合金化 Ti-TiBw 复合粉末制备的 Ti-TiBw 复合材料的烧结行为和力学性能
IF 3.4 3区 材料科学
Advanced Engineering Materials Pub Date : 2024-10-25 DOI: 10.1002/adem.202401461
Lu Shi, Shufeng Li, Deng Pan, Lei Liu, Huiying Liu, Shaolong Li, Wenfei Huang, Dongxu Hui, Xin Li, Shaodi Wang, Xin Zhang, Bo Li
{"title":"Sintering Behavior and Mechanical Properties of Ti–TiBw Composites Prepared with Pre-alloyed Ti–TiBw Composite Powders","authors":"Lu Shi,&nbsp;Shufeng Li,&nbsp;Deng Pan,&nbsp;Lei Liu,&nbsp;Huiying Liu,&nbsp;Shaolong Li,&nbsp;Wenfei Huang,&nbsp;Dongxu Hui,&nbsp;Xin Li,&nbsp;Shaodi Wang,&nbsp;Xin Zhang,&nbsp;Bo Li","doi":"10.1002/adem.202401461","DOIUrl":"https://doi.org/10.1002/adem.202401461","url":null,"abstract":"<p>Prealloyed powders present a promising alternative to traditional ball milling processes in powder metallurgy, addressing challenges such as uneven powder mixing and incomplete reinforcement reactions. This study investigates the preparation of Ti–TiBw composites using spark plasma sintering (SPS) at temperatures ranging from 950 to 1050 °C, utilizing Ti–TiBw prealloyed composite powders. The effects of sintering temperature on the microstructure and mechanical properties of Ti–TiBw composites are studied, comparing prealloyed composite powders with ball-milled premixed powders. As a result, the composites exhibit excellent strength and ductility, with an ultimate tensile strength of 676 MPa at 1000 °C and an elongation of 20.42% at 1050 °C. Comparatively, Ti–TiBw composites prepared from premixed powders achieve densification at 1050 °C, 50 °C higher than those prepared from prealloyed powders.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"26 22","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142674378","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}
引用次数: 0
Stereolithography Printing and Mechanical Properties of Polyethylene Glycol Diacrylate/Hexagonal Boron Nitride Ceramic Composites 聚乙二醇二丙烯酸酯/六方氮化硼陶瓷复合材料的立体光刻印刷和力学性能
IF 3.4 3区 材料科学
Advanced Engineering Materials Pub Date : 2024-10-25 DOI: 10.1002/adem.202401572
Gongxian Yang, Bin Zou, Xinfeng Wang, Lei Li, Qinghua Chen, Xingguo Zhou, Qingguo Lai, Chuanzhen Huang
{"title":"Stereolithography Printing and Mechanical Properties of Polyethylene Glycol Diacrylate/Hexagonal Boron Nitride Ceramic Composites","authors":"Gongxian Yang,&nbsp;Bin Zou,&nbsp;Xinfeng Wang,&nbsp;Lei Li,&nbsp;Qinghua Chen,&nbsp;Xingguo Zhou,&nbsp;Qingguo Lai,&nbsp;Chuanzhen Huang","doi":"10.1002/adem.202401572","DOIUrl":"https://doi.org/10.1002/adem.202401572","url":null,"abstract":"<p>To enhance the mechanical properties of bioceramic composite bone scaffolds, a composite paste of polyethylene glycol diacrylate (PEGDA) and hexagonal boron nitride (h-BN) with a solid content of up to 42 wt% was developed in this study. The part was produced using stereolithography (SLA). The SLA printing parameters and material ratios of the paste were optimized through a homogeneous design and mechanical property tests. The results indicate that the single-line curing width of the PEGDA/h-BN paste in the XY plane ranged from 172 to 209 μm, while the curing depth of a single layer along the Z-axis ranged from 99 to 154 μm. Laser power was identified as the primary factor influencing both the width and depth of curing. The compressive strength of the printed sample of PEGDA/h-BN ceramic composite paste was measured at 222.4 ± 5.6 MPa, which is 61 times greater than the compressive strength of a pure PEGDA structure and comparable to that of cortical bone (100-230 MPa). Finally, the superior biocompatibility of PEGDA/h-BN ceramics was confirmed through cytotoxicity experiments. Consequently, PEGDA/h-BN ceramic composites meet the mechanical properties and biocompatibility requirements necessary for bone tissue applications, indicating promising potential in the field of bone tissue engineering.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"26 22","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142674375","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}
引用次数: 0
Biodegradable, Self-Adhesive, Stretchable, Transparent, and Versatile Electronic Skins Based on Intrinsically Hydrophilic Poly(Caproactone-Urethane) Elastomer
IF 3.4 3区 材料科学
Advanced Engineering Materials Pub Date : 2024-10-25 DOI: 10.1002/adem.202401704
Pulikanti Guruprasad Reddy, Vipul Sharma, Vijay Singh Parihar, Ijlal Haider, Amit Barua, Anastasia Koivikko, Kyriacos Yiannacou, Hatai Jongprasitkul, Minna Kellomäki, Veikko Sariola
{"title":"Biodegradable, Self-Adhesive, Stretchable, Transparent, and Versatile Electronic Skins Based on Intrinsically Hydrophilic Poly(Caproactone-Urethane) Elastomer","authors":"Pulikanti Guruprasad Reddy,&nbsp;Vipul Sharma,&nbsp;Vijay Singh Parihar,&nbsp;Ijlal Haider,&nbsp;Amit Barua,&nbsp;Anastasia Koivikko,&nbsp;Kyriacos Yiannacou,&nbsp;Hatai Jongprasitkul,&nbsp;Minna Kellomäki,&nbsp;Veikko Sariola","doi":"10.1002/adem.202401704","DOIUrl":"https://doi.org/10.1002/adem.202401704","url":null,"abstract":"<p>In biomedical sciences, there is a demand for electronic skins with highly sensitive tactile sensors that have applications in patient monitoring, human–machine interfaces, and on-body sensors. Sensor fabrication requires high-performance conductive surfaces that are transparent, breathable, flexible, and easy to fabricate. It is also preferable if the electrodes are easily processable as wastes, for example, are degradable. In this work, the design and fabrication of hydrophilic silanol/amine-terminated poly(caprolactone-urethane) (SA-PCLU) elastomer-based breathable, stretchable, and biodegradable electrodes are reported. Ag nanowires dispersed in water are sprayed onto the intrinsically hydrophilic electrospun SA-PCLU that became embedded into the scaffold and formed conformal hydrophilic polyurethane-based conductive networks (HPCN). The electrodes are used to fabricate capacitive, curvature, and strain sensors, all having monomaterial composition. In addition to displaying particularly good transparencies at low sheet resistances, stretchability, hydrophilicity, and tight and conformal bonding with the target surface, the electrodes also allow the evaporation of perspiration, making them suitable for epidermal sensors for long-time use. The application of the HPCN electrodes in flexible electronics and bionic skin applications is demonstrated through gesture monitoring experiments and swelling sensors.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"26 24","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adem.202401704","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851576","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
Enhancement of {110}<001> Texture by Controlling α-phase and Achievement of Low Young's Modulus and High Strength in Metastable β-type Ti–Zr-Based Alloys
IF 3.4 3区 材料科学
Advanced Engineering Materials Pub Date : 2024-10-25 DOI: 10.1002/adem.202401402
Wataru Tasaki, Yuki Makioka, Shuichi Miyazaki, Hee Young Kim
{"title":"Enhancement of {110}<001> Texture by Controlling α-phase and Achievement of Low Young's Modulus and High Strength in Metastable β-type Ti–Zr-Based Alloys","authors":"Wataru Tasaki,&nbsp;Yuki Makioka,&nbsp;Shuichi Miyazaki,&nbsp;Hee Young Kim","doi":"10.1002/adem.202401402","DOIUrl":"https://doi.org/10.1002/adem.202401402","url":null,"abstract":"<p>Achieving both low Young's modulus and high strength, which are essentially in a trade-off relationship, is an important challenge in the field of biomaterials. Herein, the effects of oxygen and nitrogen addition on mechanical properties and recrystallization texture of a metastable Ti–18Zr–3Nb–3Sn–2Mo alloy are investigated. Both oxygen and nitrogen additions increase the apparent yield stress and tensile strength. The N-added alloy exhibits an exceptionally strong {110}&lt;001&gt; texture, commonly referred to as Goss texture, leading to a lower Young's modulus when compared with the O-added alloy. It is found that the formation and subsequent dissolution of the α-phase plays an important role in the development of recrystallization texture. The {110}&lt;001&gt; texture can be enhanced in the O-added alloy by a two-step heat treatment, the first step to form the α-phase and the second step to dissolve the α<i>-</i>phase during recrystallization. An excellent combination of a low Young's modulus and a high yield stress is achieved in the O-added alloy subjected to the two-step heat treatment.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"26 24","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851577","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}
引用次数: 0
Preparation of Self-Driven Triboelectric Nanosensor Based on Chitosan-Coated Ti Foil for Detecting Blood Glucose Concentration 基于壳聚糖涂层钛箔制备用于检测血糖浓度的自驱动三电纳米传感器
IF 3.4 3区 材料科学
Advanced Engineering Materials Pub Date : 2024-10-25 DOI: 10.1002/adem.202400648
Ruijie Yao, Xiaoxue Xu, Yixuan Zhang, Jing Zhang, Weilong Wang, Wei Li, Minfang Chen
{"title":"Preparation of Self-Driven Triboelectric Nanosensor Based on Chitosan-Coated Ti Foil for Detecting Blood Glucose Concentration","authors":"Ruijie Yao,&nbsp;Xiaoxue Xu,&nbsp;Yixuan Zhang,&nbsp;Jing Zhang,&nbsp;Weilong Wang,&nbsp;Wei Li,&nbsp;Minfang Chen","doi":"10.1002/adem.202400648","DOIUrl":"https://doi.org/10.1002/adem.202400648","url":null,"abstract":"<p>The clinical diagnosis of diabetes mellitus typically depends on blood glucose measurements. Many laboratory studies have focused on enzyme–electrode biosensors that require an external power source. In this study, the potential of triboelectric nanogenerators (TENGs) as self-driven sensors for glucose detection is investigated by utilizing the glucose specificity of glucose oxidase. When immersed in glucose solutions with concentrations ranging from 3.9 to 13.1 mmol L<sup>−1</sup>, the TENGs exhibit a linear relationship between the glucose concentration and current and voltage changes. These findings suggest that the TENGs developed in this study can effectively function as glucose sensors, providing a foundation for future human blood glucose monitoring applications and demonstrating a promising new approach for biomedical sensor technology.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"26 22","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142674374","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}
引用次数: 0
Self-Healing Waterborne Polyurethanes as a Sustainable Gel Electrolyte for Flexible Electrochromic Devices 自愈合水性聚氨酯作为柔性电致变色设备的可持续凝胶电解质
IF 3.4 3区 材料科学
Advanced Engineering Materials Pub Date : 2024-10-22 DOI: 10.1002/adem.202470050
Eunji Kim, Jae Won Choi, Fayong Sun, Soo Yeon Eom, Ye Won Choi, Beomjin Jeong, Jong S. Park
{"title":"Self-Healing Waterborne Polyurethanes as a Sustainable Gel Electrolyte for Flexible Electrochromic Devices","authors":"Eunji Kim,&nbsp;Jae Won Choi,&nbsp;Fayong Sun,&nbsp;Soo Yeon Eom,&nbsp;Ye Won Choi,&nbsp;Beomjin Jeong,&nbsp;Jong S. Park","doi":"10.1002/adem.202470050","DOIUrl":"https://doi.org/10.1002/adem.202470050","url":null,"abstract":"<p><b>Self-Healing Waterborne Polyurethanes</b>\u0000 </p><p>In article number 2400993, Jong S. Park and co-workers develop waterborne polyurethanes (WPUs) with dynamic disulfide bonds, offering exceptional self-healing capabilities without compromising adhesive strength. Additionally, flexible electrochromic devices with WPU-based sustainable ion gels show impressive switching performance, featuring high coloration efficiency and enduring stability.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"26 20","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adem.202470050","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555461","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
Finite-Element Analysis of an Antagonistic Bistable Shape Memory Alloy Beam Actuator 拮抗双稳态形状记忆合金梁致动器的有限元分析
IF 3.4 3区 材料科学
Advanced Engineering Materials Pub Date : 2024-10-22 DOI: 10.1002/adem.202400969
Hamid Shahsavari, Xi Chen, Georgino Kaleng Tshikwand, Frank Wendler, Manfred Kohl
{"title":"Finite-Element Analysis of an Antagonistic Bistable Shape Memory Alloy Beam Actuator","authors":"Hamid Shahsavari,&nbsp;Xi Chen,&nbsp;Georgino Kaleng Tshikwand,&nbsp;Frank Wendler,&nbsp;Manfred Kohl","doi":"10.1002/adem.202400969","DOIUrl":"https://doi.org/10.1002/adem.202400969","url":null,"abstract":"<p>A finite-element (FE) analysis of the active bistability of an antagonistic shape memory alloy (SMA) beam actuator of TiNiCu is presented. The actuator comprises two coupled SMA beams that are clamped at both ends and coupled in their center by a spacer having different memory shapes being deflected in opposite out-of-plane directions. The actuator is characterized by two equilibrium positions. To determine bistable behavior as a function of geometrical parameters, a force criterion is defined by the coupling force of the beams in austenitic and martensitic states. Bistable behavior is achieved, if the coupling force does not change sign in the entire displacement range. This implies that the austenitic beam dominates the opposing martensitic beam. Thus, selective heating of the SMA beams results in a snap-through motion of the coupled SMA beams. Depending on which of the two beams is in austenitic state, either of the two equilibrium positions is reached without the need for an external force. It is demonstrated that geometrical parameters like initial predeflection and spacer length have a crucial effect on the bistable performance. Bistable regions as well as critical limits characterized by geometry-dependent stability ratios, beyond which the actuator's performance becomes monostable, are identified.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"26 22","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adem.202400969","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142674164","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
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