Functional Composites and Structures最新文献

{"title":"Unique correlation between electrical, structural properties and electromagnetic shielding properties of carbon nanotube sheets","authors":"Minseouk Choi, Young Shik Cho, Kyung Tae Park, Kyunbae Lee, Keun-Young Shin, Yeon-Ho Jung, Taehoon Kim","doi":"10.1088/2631-6331/ad3ee0","DOIUrl":"https://doi.org/10.1088/2631-6331/ad3ee0","url":null,"abstract":"\u0000 Correlation between electrical, structural properties and electromagnetic shielding efficiency (EMI SE) of carbon nanotube sheets (CNTSs) was investigated. Solvent densification of CNTSs led to enhancements of carbon nanotube bundling behavior and densification in the thickness direction while maintaining the areal density of the CNTSs. These structural modifications resulted in enhanced electrical properties and reduced sheet thickness by modifying the microstructure and bundling characteristics. Remarkably, contrary to conventional EMI shielding materials, the sheet resistance which reflects bundling behavior and microstructure of CNTSs, is the critical factor affecting the EMI SE of the CNTSs rather than electrical conductivity. The findings provide fundamental insights essential for the design of EMI shielding films incorporating carbon nanotubes","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140703675","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}

{"title":"Development of hBN / natural fibers reinforced polymer composites using Grey Relation Grade Analysis for thermal and electrical applications","authors":"R. Kirubakaran, Dinesh Ramesh Salunke, Shenbaga Velu Pitchumani, V. Gopalan, Aravindh Sampath","doi":"10.1088/2631-6331/ad3edd","DOIUrl":"https://doi.org/10.1088/2631-6331/ad3edd","url":null,"abstract":"\u0000 The objective of this work is to enhance the thermal conductivity and electrical properties of polymer hybrid composites through a systematic novel Grey Relation Grade Analysis (GRGA) optimization approach. This involves reinforcing the hybrid composites with hexagonal Boron Nitride (hBN) and various kinds of natural fibers or fillers. The development of a unique technology to produce multiphase composites using 2% of natural fibers or fillers such as coir fiber (CF), rice husk filler (RF), wood filler (WF), banana fiber (BF) and sugarcane fiber (SF) along with hBN (1, 3, 5 wt.%) particulates as reinforcements in epoxy matrix. The Taguchi L15 matrix array is utilized to fabricate interlaced composite samples via hand layup molding. Ultrasonic waves are used to ensure the uniform distribution of hBN filler into the matrix. Analysis of variance (ANOVA) and GRGA reveal the significant results. It shows that the multiphase hybrid composites exhibit good thermal conductivity when higher content of hBN (5 wt.%) particulate for all the micro particulate polymer (MPP) composites. Multi-response optimization shows that the micro banana fiber (2 wt.%) interlaces with hBN (5 wt.%) composite exhibits the higher thermal conductivity and electrical resistance compared to all other natural fiber interlaced composites. The aforementioned MPP composite has thermal conductivity of 1.03 W/m.K and electrical resistance of 279.88 Giga Ohms. Besides, the wood filler interlaced hBN (5 wt.%) composite shows the minimum dielectric constant compared to all other natural fiber composites. This desirable result is caused by the proper dispersion of hBN with the matrix which encourages interlocking with the fiber and the matrix. Maximum electrical resistance is observed for composite containing 5 wt.% of h-BN and 2 wt.% of BF. The developed MPP composite could be used in heat shields, electrical insulation components, and interior automotive components like dashboards, luggage compartments and interior walls.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140698938","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}

{"title":"Enhancing Methyl Orange Degradation with TiO2/Fe2O3/AC Composites: Synergistic Adsorption-Photocatalysis","authors":"C. W. Kartikowati, Adi Darmawan, Teguh Endah Saraswati, Damar Nurwahyu Bima, Ahmad Jundullah Akbar, Bima Wiguna, O. Arutanti, Aditya Farhan Arif","doi":"10.1088/2631-6331/ad3edf","DOIUrl":"https://doi.org/10.1088/2631-6331/ad3edf","url":null,"abstract":"\u0000 Fe2O3/TiO2/AC composites were successfully synthesized via a sol-gel method, and their efficacy in decomposing methyl orange via adsorption-photocatalytic processes was reported for the first time in this study. Systematic exploration of the physicochemical properties impacting photocatalytic activity was conducted through X-ray diffraction (XRD), scanning electron microscopy - Energy-dispersive X-ray spectroscopy (SEM-EDS), and Fourier transform infrared spectroscopy (FTIR) characterizations. The study revealed that the degradation of methyl orange resulted from a synergistic interplay between adsorption and photocatalysis. The incorporation of Fe2O3 nanoparticles significantly elevated photocatalytic activity by 70%, with additional enhancement observed upon the introduction of activated carbon (AC) particles. The synergistic effects of AC adsorption and TiO2/Fe2O3 photocatalysis exhibited remarkable efficiency in degrading methyl orange under visible light irradiation. The trial functioning of Fe2O3 and AC in the TiO2/Fe2O3/AC composite, which serves as an adsorbent, an electron trap, and a co-catalyst providing active sites, significantly improved photocatalytic activity. These findings not only contribute to understanding the crucial role of composite TiO2 in conjunction with metal and carbon-based co-catalysts but also hold valuable implications for advancing research in the development of adsorption-photocatalytic systems for wastewater treatment.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140703383","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}

{"title":"Analysis of mechanical and shape memory properties of biocompatible shape memory polymers with different Fe3O4 contents","authors":"Min Seok Kim, Young Bin Kim, Minjong Lee, Heoung-Jae Chun","doi":"10.1088/2631-6331/ad3dbe","DOIUrl":"https://doi.org/10.1088/2631-6331/ad3dbe","url":null,"abstract":"\u0000 Shape memory polymers (SMPs), such as polycaprolactone, can recall their original shape when exposed to environmental factors like heat, light, or magnetic fields. These polymers are extensively used in medical applications, notably in stents, due to their shape memory and biocompatibility after implantation in the human body. However, conventional stents require balloons for expansion, limiting their flexibility. To address this, the study developed an SMP material that can regain its original shape without the need for a balloon. Magnetic-responsive Fe3O4 nanoparticles at concentrations of 10 %, 15 %, and 20 % were incorporated, resulting in a high shape memory ratio (84-93 %). The study also confirmed the uniform dispersion of nanoparticles using scanning electron microscopy (SEM) and measured the glass transition temperature, crystallization temperature, and melting point of the synthesized polymers using differential scanning calorimetry (DSC). Therefore, the biocompatible, magnetic-responsive shape-memory polymer developed in this study has the potential to be utilized in various medical devices as an advanced shape-memory material.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140713489","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}

{"title":"Investigation on the Compressive Characteristics and Optimization of Design Parameters of a Novel Functionally Graded Cell Structure","authors":"Sakthi Balan Ganapathy, Aravind Raj Sakthivel","doi":"10.1088/2631-6331/ad2c0f","DOIUrl":"https://doi.org/10.1088/2631-6331/ad2c0f","url":null,"abstract":"Novel structural conceptualizations frequently incorporate inventive ideas, materials, or construction techniques. This study presents a unique design inspired by the traditional practice of sikku rangoli, a cultural tradition prevalent in the southern region of India, particularly in Tamil Nadu. Because it was novel, it was necessary to optimize the fundamental design for maximal outputs. In contrast to honeycomb structures, intercellular interactions are believed to contribute to the overall strengthening of the structure. By eliminating sharp corners from the structure, stress accumulation is prevented, resulting in improved stress distribution. Therefore, the design aspects that were deemed significant were taken into consideration and through the implementation of experimental design, an optimum design was determined. Utilizing the optimal base design as a foundation, the structure underwent several printing processes using diverse materials and incorporated multiple fillers. Furthermore, the structure was subjected to modifications employing the functional grading design concept. The study employed the functional grading design concept to examine the variations in load bearing capability, load distribution, and failure mode. The findings indicate that the compression strength of the composite structure was mostly influenced by the wall thickness. The combination of a carbon fiber reinforced base material with silicone rubber as filler, together with a functional graded cell structure featuring top and bottom densification, exhibited the highest compression strength compared to all other combinations. In order to investigate the accurate impact of the FG structures, every cell design was printed using PLA-CF, subjected to testing devoid of any additives, and the output parameters were computed. The results indicated that the center densified cell design exhibited significant values for specific energy absorption, relative density, and compressive strength (52.63 MPa, 0.652, and 2.95 kJ kg⁻¹, respectively). The design of the base cell exhibited the greatest crushing force efficacy of 0.982.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140315052","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}

{"title":"Design and Fabrication of Bioinspired Pattern Driven Magnetic Actuators","authors":"Anasheh Khecho, E. B. Joyee","doi":"10.1088/2631-6331/ad335f","DOIUrl":"https://doi.org/10.1088/2631-6331/ad335f","url":null,"abstract":"\u0000 Additive manufacturing (AM) has drawn significant attention in the fabrication of soft actuators due to its unique capability of printing geometrically complex parts. This research presents the design and development of an AM process for bioinspired, deformable, and magnetic stimuli-responsive actuator arms. The actuator arms were fabricated via the material extrusion-based AM process with magnetic particle-polymer composite filaments. Inspired by the rhombus cellular structure found in nature, different design parameters, such as the line width of the interior rhombus sides, and 3D printing parameters were studied and optimized to fabricate actuator arms that exhibit enhanced flexibility while being magnetically actuated. The trigger distance and deformation experiments revealed that the width of the rhomboids’ sides played a critical role in magnetic and bending properties. It was found that the sample with a line width of 550 µm and printing layer thickness of 0.05 mm had the maximum deflection with a measured bending angle of 34 degrees. The magnetic property measurement exhibited that the sample with a line width of 550 µm showed the maximum magnetic flux density of 3.2 mT. The trigger distance results also supported this result. A maximum trigger distance of 8.25 mm was measured for the arm with a line width of 550 µm. Additionally, tensile tests showed that the sample exhibited a 17.7 MPa tensile strength, 1.8 GPa elastic modulus, and 1.3% elongation. Based on these results, we successfully fabricated a 3D printed magnetic gripper with two rhombus cellular structured arms which showed grasping and extensive load lifting capability (up to ~140 times its weight).","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140246015","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}

{"title":"Path planning of complicated hierarchical thin-wall structures using multi-material additive manufacturing technology","authors":"Chengcheng Niu, Congcomg Luan, H. Shen, Jianzhong Fu","doi":"10.1088/2631-6331/ad304e","DOIUrl":"https://doi.org/10.1088/2631-6331/ad304e","url":null,"abstract":"\u0000 Multilayer thin-wall structures have demonstrated significant application potential in wearable devices, pressure vessels, and aerospace industries, with additive manufacturing poised to further unlock their capabilities. Although path planning, a crucial aspect of additive manufacturing, has been extensively studied for homogeneous structures, research on path planning for heterogeneous structures remains limited. This study introduces a novel path planning algorithm, termed CPCNHTS, for generating continuous paths in complex non-rotating bodies with hierarchical thin-walled structures. CPCNHTS encompasses adaptive slicing, path offset, and robotic postprocessing techniques. The adaptive slicing method is employed to enhance the slicing model's accuracy through volume error control. Moreover, the path offset method is designed to derive the printing path using a parallel curve of the inner contour. Identification of the inner contour is based on the curvatures and areas of single and double contours, respectively. The robotic postprocessing method is employed to convert the printing path into executable codes for multimaterial additive equipment. As a compelling application of the CPCNHTS algorithm, a limb prosthetic socket was successfully fabricated, highlighting the remarkable potential of this approach within the wearable devices domain.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140079346","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}

{"title":"Eco-friendly innovation: harnessing nature’s blueprint for enhanced photocatalysis and antimicrobial potential in multi-structured PN/ZnO nanoparticles","authors":"Jyoti Gaur, Sanjeev Kumar, Harpreet Kaur, Mohinder Pal, Supreet4, Kanchan Bala, Khalid Mujasam Batoo, Johnson Oshiobugie Momoh, Sajjad Hussain","doi":"10.1088/2631-6331/ad2c10","DOIUrl":"https://doi.org/10.1088/2631-6331/ad2c10","url":null,"abstract":"This research unveils an innovative approach to green synthesis, detailed characterization, and multifunctional exploration of bio-functionalized zinc oxide nanoparticles (PN/ZnO NPs) adorned with phytochemicals from <italic toggle=\"yes\">Piper nigrum</italic> (PN). Employing an extensive suite of spectroscopic techniques and physicochemical methods, including UV–vis spectroscopy, field emission scanning electron microscope (FESEM), high-resolution transmission electron microscope (HRTEM), energy dispersive x-ray (EDX) spectroscopy, Fourier-transform infrared (FTIR), x-ray diffraction (XRD), and Brunauer–Emmett–Teller (BET) analysis, the study delves into the unique properties of PN/ZnO NPs. XRD confirms the development of the wurtzite phase with a crystallite diameter of 47.77 nm. FTIR reveals ZnO functionalization by PN’s phytochemicals, while FESEM and HRTEM suggest diverse architectural features. Selected area electron diffraction patterns authenticate the crystalline structure. BET analysis showcases a large specific surface area of 80.72 m² g⁻¹ and a mesoporous structure. The absorption peak at 372 nm and an energy band gap (<italic toggle=\"yes\">E</italic>\u0000_g) of 3.44 eV validate ZnO NP formation. The catalytic performance is demonstrated through the degradation of commercial reactive yellow-17 (RY-17) dye, with PN/ZnO (dosage 300 mg l⁻¹) achieving 94.72% removal at a dose of 120 mg l⁻¹. Pseudo-first-order kinetics govern the photodegradation process. PN-ZnO NPs showcase potent antimicrobial efficacy against both gram-negative and gram-positive bacteria, with varying clearance zones. This study stands as an impactful exploration, integrating green synthesis, detailed characterization, and versatile functionalities of PN/ZnO NPs.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140315171","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}

{"title":"Investigation of the effect of silica particles and silane coupling agent on silica-filled tire tread compounds","authors":"Gi-Yong Um, Taehoon Kwon, Seong Hwan Lee, Seong Hye Kim, Min Yu Kim, Sejin Choi, Seunggun Yu, Jin Hong Lee","doi":"10.1088/2631-6331/ad2f41","DOIUrl":"https://doi.org/10.1088/2631-6331/ad2f41","url":null,"abstract":"\u0000 Enhancing attributes such as abrasion resistance, wet grip, and rolling resistance significantly impacts the overall performance optimization in tire tread applications. These attributes are predominantly influenced by the dispersity of silica filler within tire tread compounds. Therefore, it becomes imperative to enhance silica dispersion by thoroughly investigating the impact of each constituent in the tire tread compound. This study aims to elucidate the effects of silica particle size and silane coupling agents on tire tread compound properties. The results demonstrate that larger specific surface area silica particles alongside 3-mercaptopropyltrimethoxysilane coupling agents effectively reduce filler-filler interactions and enhance silica dispersion within the tire tread compound. Consequently, these improvements contribute to the overall enhancement of tire tread compound performance. These findings offer valuable insights into advancing the reinforced performance of tire tread compounds through the synergistic utilization of each constituent.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140081707","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}

{"title":"Mechanical and morphological analysis of cellulose extracted from sisal fibers and their effect on bio-based composites mechanical properties","authors":"Samir Zidi, Imed Miraoui","doi":"10.1088/2631-6331/ad2fe5","DOIUrl":"https://doi.org/10.1088/2631-6331/ad2fe5","url":null,"abstract":"\u0000 This study aims to investigate the viability of untreated sisal fibers (N.F.), NaOH-treated sisal fibers (NaOH.F.) and cellulose extracted from sisal (CELL.F.) as an alternative to synthetic materials to produce biocomposites. The main objective was to conduct an in-depth study of the properties of these fibers whose aim is to limit matrix/fiber slippage and improve adhesion by modifying reinforcement surfaces, and to improve the efficiency of sisal fibers as reinforcements for composite materials using various analytical techniques including Fourier transform infrared spectroscopy, scanning electron microscopy, x-ray diffraction, and thermogravimetric analysis. In addition, the study aimed to produce a composite material by reinforcing plaster with the aforementioned fibers and then compare the mechanical and physical properties of the resulting material. The results showed that cellulose fibers exhibited higher mechanical strength and better compatibility with the plaster-matrix compared to sisal fibers by an increse of 324% in their tensil strength compared to natural sial fibers. In particular, the flexural strength showed a significant increase of 35% in the cellulose fiber reinforced composite. The reinforced composite material exhibited improved properties such as better flexural strength, increased absorption by 12.8% and descres the density by 21.3%, highlighting the promising prospects of cellulose fibers in advancing biocomposite technology.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140281448","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}