Functional Composites and Structures最新文献_第7页

Development of large-scale electret fabrication system for triboelectric nanogenerator electrical output amplification 用于摩擦电纳米发电机输出放大的大型驻极体制造系统的开发

IF 2.8

Functional Composites and Structures Pub Date : 2022-11-08 DOI: 10.1088/2631-6331/aca138

Sunmin Jang, Sumin Cho, Donghan Lee, Yoonsang Ra, Dongik Kam, Jaehyun Lee, Gyuha Lee, Moonwoo La, D. Choi

{"title":"Development of large-scale electret fabrication system for triboelectric nanogenerator electrical output amplification","authors":"Sunmin Jang, Sumin Cho, Donghan Lee, Yoonsang Ra, Dongik Kam, Jaehyun Lee, Gyuha Lee, Moonwoo La, D. Choi","doi":"10.1088/2631-6331/aca138","DOIUrl":"https://doi.org/10.1088/2631-6331/aca138","url":null,"abstract":"The triboelectric nanogenerator (TENG), which converts mechanical energy to electrical output, is garnering attention owing to their application in low-energy electronic devices as a power source. To utilize the TENG as a power source, amplifying the electrical output and enhancing energy conversion efficiency are necessary. As the TENG generates electrical output through contact electrification and electrostatic charge induction, the electrical output can be amplified by enhancing the two mechanisms through the enlargement of the TENG area and the adoption of the pre-charge injected film (electret). In this regard, the fabrication of the large-scale electret is significant for amplifying the electrical output of the TENG. In this study, a corona charging system is proposed for the fabrication of the large-scale electret with a uniform charge-distributed area. Corona charging injects O2 ions into a dielectric film with an electric field generated between the pin electrode and ground electrode (GE). Through the utilization of a multi-PE (MPE) and conveyor belt-shaped GE (CBsGE) in the corona charging system, the O2 molecules near the pins can be ionized simultaneously while the CBsGE is rotating. Thus, the O2 ions can be injected uniformly into a wide area. About a voltage of 400 V and current of 45 μA can be generated by applying the fabricated electret to the TENG. As several electrets with various sizes can be fabricated simultaneously, the TENG with high electrical output can be batch fabricated to enhance its practicality significantly.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2022-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48492568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Self-powered hybrid triboelectric–piezoelectric electronic skin based on P(VDF-TrFE) electrospun nanofibers for artificial sensory system 基于P（VDF-TrFE）电纺纳米纤维的自供电混合摩擦电-压电电子皮肤用于人工传感系统

IF 2.8

Functional Composites and Structures Pub Date : 2022-11-08 DOI: 10.1088/2631-6331/aca139

Sumin Cho, Sunmin Jang, Donghan Lee, Yoonsang Ra, Dongik Kam, Jong Woo Kim, Do-Shik Shin, Kyoung Duck Seo, D. Choi

{"title":"Self-powered hybrid triboelectric–piezoelectric electronic skin based on P(VDF-TrFE) electrospun nanofibers for artificial sensory system","authors":"Sumin Cho, Sunmin Jang, Donghan Lee, Yoonsang Ra, Dongik Kam, Jong Woo Kim, Do-Shik Shin, Kyoung Duck Seo, D. Choi","doi":"10.1088/2631-6331/aca139","DOIUrl":"https://doi.org/10.1088/2631-6331/aca139","url":null,"abstract":"Piezoelectric sensors have been developed due to the self-powered sensing and flexibility and the promising potential applications in the electronic skin (e-skin) inspired by human skin. However, although the piezoelectric sensors have an excellent performance in detecting human movements, it is difficult to distinguish external mechanical stimuli such as tapping in a single structure, together. Here, we suggest a self-powered e-skin based on electrospun poly(vinylidene fluoride-trifluoroethylene), nanofiber hybrid triboelectric–piezoelectric sensor (E-HTPS), that can identify between human motions and external touch based on both triboelectric effect and piezoelectric effect. Triboelectric effect-based sensors have a good electrical output characteristic with various advantages of high-flexibility and simple working operation. Hence, the E-HTPS consists of two layers, triboelectric layer as a tactile sensor and piezoelectric layer as a human motion sensor. Therefore, we demonstrate that the E-HTPS can detect human movements and even finger touch with attached to the target body part. Consequently, the E-HTPS could provide an effective approach to designing the self-powered e-skin as an artificial sensory system for healthcare monitoring and soft robotics.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2022-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45217791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Solutions for elastic moduli of three-phase composite with random distribution of coated-ellipse inclusions 随机分布包覆椭圆夹杂物的三相复合材料弹性模量解

IF 2.8

Functional Composites and Structures Pub Date : 2022-10-31 DOI: 10.1088/2631-6331/ac9c42

V. Nguyen

引用次数: 0

Investigating the low-velocity impact behaviour of sandwich composite structures with 3D-printed hexagonal honeycomb core—a review 三维打印六边形蜂窝芯夹层复合材料结构低速冲击性能研究综述

IF 2.8

Functional Composites and Structures Pub Date : 2022-10-28 DOI: 10.1088/2631-6331/ac9e89

Mohd Azaman Md Deros, Nur Ainin Faissal, M.S. Abdul Majid, Mohd Ridzuan Mohd Jamir

引用次数: 2

Dynamic mechanical thermal analysis of unaged and hygrothermally aged discontinuous Bouligand structured CFRP composites 非时效和湿热时效非连续Bouligand结构CFRP复合材料的动态力学热分析

IF 2.8

Functional Composites and Structures Pub Date : 2022-10-13 DOI: 10.1088/2631-6331/ac99d2

C. Nwambu, C. Robert, Parvez Alam

{"title":"Dynamic mechanical thermal analysis of unaged and hygrothermally aged discontinuous Bouligand structured CFRP composites","authors":"C. Nwambu, C. Robert, Parvez Alam","doi":"10.1088/2631-6331/ac99d2","DOIUrl":"https://doi.org/10.1088/2631-6331/ac99d2","url":null,"abstract":"A dynamic mechanical thermal analyser operating in the single cantilever mode was used to examine the dynamic mechanical properties of unaged and hygrothermally aged discontinuous asymmetric helicoidal (Bouligand) carbon fibre reinforced plastic (CFRP) composites as a function of fibre architecture. The discontinuous Bouligand was manufactured using two major pitch angles as independent variables: 90° and 120° and from each major pitch angle, minor interply pitch angles were used as independent variables ranging 5°–25°. The composites were tested as either dry unaged specimens or following hygrothermal ageing in seawater at the constant temperatures of 40 °C and 60 °C for over 2000 h. We find that the viscoelastic properties E′ and E″ are adversely affected by both hygrothermal aging and the minor pitch angle, but not the major pitch angle. Higher hygrothermal ageing temperatures and increasing minor pitch angles are found to decrease the energy absorption and dissipation capacities of discontinuous Bouligand structured CFRP composites. The tan-δ curves also indicate that hygrothermal ageing increases the heterogeneity of discontinuous Bouligand structured composites, with separate viscoelastic phases and glass transition temperatures.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2022-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41912995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Influence of phosphorus-based flame retardants on polypropylene insulation for high-voltage power cable applications 磷基阻燃剂对高压电力电缆用聚丙烯绝缘性能的影响

IF 2.8

Functional Composites and Structures Pub Date : 2022-10-11 DOI: 10.1088/2631-6331/ac9951

Do-Kyun Kim, Seong Hwan Lee, Shi Hong, M. Ahn, Se-Won Han, D. Lee, Seunggun Yu

{"title":"Influence of phosphorus-based flame retardants on polypropylene insulation for high-voltage power cable applications","authors":"Do-Kyun Kim, Seong Hwan Lee, Shi Hong, M. Ahn, Se-Won Han, D. Lee, Seunggun Yu","doi":"10.1088/2631-6331/ac9951","DOIUrl":"https://doi.org/10.1088/2631-6331/ac9951","url":null,"abstract":"For high voltage (HV) power cable applications, various studies have been performed to improve the mechanical and electrical properties of polypropylene (PP)-based insulation materials to replace crosslinked polyethylene. However, studies on the effect of additives to yield additional PP properties are still lacking. Herein, we prepared PP blends by melt-mixing widely used commercial flame retardants for PP with isotactic PP (iPP) and investigated their electrical breakdown, flame retardancy behaviors, and UV stability. Among the five kinds of flame retardants employed, aluminum hypophosphite (AHP), aluminum diethyl phosphinate, melamine pyrophosphate, ammonium polyphosphate (APP), and APP treated with silane, AHP was very effective in minimizing the decrease of the direct current breakdown strength of iPP at both 25 °C and 110 °C in the range of 5–20 phr. Particularly, only AHP afforded V-2 grade flame retardancy to iPP, and the flame retardancy was maintained even when the content was reduced to 3 phr. Furthermore, upon exposure to ultraviolet (UV) rays for 5 d, the tensile strength of pristine iPP decreased by approximately 44%, while that of a blend with 3 phr AHP decreased by only 10%. The study results will contribute to the optimization of power cable products through the use of appropriate flame retardants in the design of high-performance PP-based HV insulation materials.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2022-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49665442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultrasmall molybdenum-iron nitride nanoparticles confined carbon nanotubes hybrids for efficient overall water splitting 超小型氮化钼铁纳米颗粒限制碳纳米管杂化体的高效整体水分解

IF 2.8

Functional Composites and Structures Pub Date : 2022-09-21 DOI: 10.1088/2631-6331/ac93e4

Mun Sang Yun, Thanh Hai Nguyen, D. Tran, N. Kim, J. Lee

{"title":"Ultrasmall molybdenum-iron nitride nanoparticles confined carbon nanotubes hybrids for efficient overall water splitting","authors":"Mun Sang Yun, Thanh Hai Nguyen, D. Tran, N. Kim, J. Lee","doi":"10.1088/2631-6331/ac93e4","DOIUrl":"https://doi.org/10.1088/2631-6331/ac93e4","url":null,"abstract":"In an attempt to find an alternative approach to reduce the use of noble metal-based electrocatalysts, a new hybrid nanostructure based on molybdenum-iron nitride nanoparticles (Mo–Fe–N NPs) deposited carbon nanotubes (CNTs) supported on nickel foam substrate is fabricated via a facile synthetic approach. Highly uniform and dense Mo–Fe–N NPs achieves full coverage on surface of the CNTs with good interactions and enhanced hetero-charge transfer, thus leading to improvements in both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). The fabricated hybrid shows small overpotential of 106 mV at 10 mA cm−2 for HER and 420 mV at 100 mA cm−2 for OER, along with prospective stability after 20 h of continuous testing in alkaline electrolyte (1.0 M KOH). The catalytic activities of the Mo–Fe–N/CNTs material are shown to be superior to those of other synthesized catalysts as well as of commercial Pt/C and RuO2 catalysts. These results may pave a potential route to the fabrication of novel electrocatalysts having high performance that can effectively replace precious metal-based catalysts in electrochemical water splitting technology.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43132535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Enhanced dispersion stability and interfacial damping of POSS-functionalized graphene oxide in PDMS nanocomposites poss功能化氧化石墨烯在PDMS纳米复合材料中的分散稳定性和界面阻尼增强

IF 2.8

Functional Composites and Structures Pub Date : 2022-09-21 DOI: 10.1088/2631-6331/ac93e3

Bog G. Kim, Byungwoo Youn, Yeeun Song, Doojin Lee

引用次数: 1

A study on the hybrid polystyrene composite filled with elephant-grass-biochar and doped-aluminium-content 大象草生物炭与掺铝复合材料的研究

IF 2.8

Functional Composites and Structures Pub Date : 2022-08-30 DOI: 10.1088/2631-6331/ac8ddf

A. Adeniyi, S. Abdulkareem, Joshua O. Ighalo, Maryam T. Abdulkareem, K. Iwuozor, E. Emenike

引用次数: 12

A comprehensive review on applications of 3D printing in natural fibers polymer composites for biomedical applications 3D打印技术在生物医用天然纤维高分子复合材料中的应用综述

IF 2.8

Functional Composites and Structures Pub Date : 2022-08-30 DOI: 10.1088/2631-6331/ac8658

J. Chohan, Raman Kumar, Sandeep Singh, Shubham Sharma, R. Ilyas

{"title":"A comprehensive review on applications of 3D printing in natural fibers polymer composites for biomedical applications","authors":"J. Chohan, Raman Kumar, Sandeep Singh, Shubham Sharma, R. Ilyas","doi":"10.1088/2631-6331/ac8658","DOIUrl":"https://doi.org/10.1088/2631-6331/ac8658","url":null,"abstract":"Over the past few decades, three-dimensional (3D) printing technologies have surpassed the conventional manufacturing techniques due to their wide applications and advantages. The applications of 3D printing in biomedical field is ever increasing due to improvement in accuracy and surface quality of products. The development of biomedical implants through patient specific data and rapid tooling techniques has revolutionized the research activities. Now-a-days, the metal printers have capability to directly create metal implants using biocompatible metallic alloys. This paper focuses on the potential applications of 3D printing in biomedical fields with specific emphasis on tissue engineering and bio-printing of organs using bio-inks. This paper also reviews various biocompatible and biodegradable materials used in recent in-vivo and in-vitro studies. It has been deduced from the study that use of natural fibers in polymers resulted in improved mechanical strength of products. Also, the implementation of additive manufacturing technologies for production of composites would lead to production of customized product.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2022-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46636115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2