Pub Date : 2023-01-09DOI: 10.1088/2631-6331/acb19b
A. Adeniyi, K. Iwuozor, E. Emenike, Mubarak A. Amoloye, Emmanuel S Aransiola, Fawaz O. Motolani, Sodiq H Kayode
This study is a review of published literature that discusses the utilization of biochar (BC) and plastics as filler and matrix, respectively, in a composite material. These composites, referred to as Biochar-filled plastic composites (BFPCs), play a significant role in the production of environmentally friendly materials. This paper provides an overview of BFPCs, their properties (mechanical, rheological, morphological, electrical, and thermal properties), fabrication techniques, and prospects and challenges associated with their development. Even though there have been previous studies on BFPCs, none of these studies have discussed the drawbacks and potential associated with the development of BFPCs. BCs’ small weight makes them a more appealing option than traditional mineral fillers when it comes to reducing vehicle weight. Due to their superior mechanical and thermal qualities, as well as their low carbon footprint, BC-filled plastic composites (BFPCs) play a significant role in the production of environmentally friendly materials. It was observed that either melt extrusion or injection molding are usually used to fabricate BFPC. It was observed that the properties of BFPCs are influenced by several factors such as the type and concentration of plastic, method of fabrication, the BC content, mixing uniformity of the mixture, wetting, and particle dispersion. Challenges of BFPCs were also discussed, such as the issue of particle agglomeration and poor interfacial bonding at high BC concentrations in the composite. Composites made from recycled polymers or biodegradable polymers can be developed to improve the composites’ overall sustainability.
{"title":"Prospects and problems in the development of biochar-filled plastic composites: a review","authors":"A. Adeniyi, K. Iwuozor, E. Emenike, Mubarak A. Amoloye, Emmanuel S Aransiola, Fawaz O. Motolani, Sodiq H Kayode","doi":"10.1088/2631-6331/acb19b","DOIUrl":"https://doi.org/10.1088/2631-6331/acb19b","url":null,"abstract":"This study is a review of published literature that discusses the utilization of biochar (BC) and plastics as filler and matrix, respectively, in a composite material. These composites, referred to as Biochar-filled plastic composites (BFPCs), play a significant role in the production of environmentally friendly materials. This paper provides an overview of BFPCs, their properties (mechanical, rheological, morphological, electrical, and thermal properties), fabrication techniques, and prospects and challenges associated with their development. Even though there have been previous studies on BFPCs, none of these studies have discussed the drawbacks and potential associated with the development of BFPCs. BCs’ small weight makes them a more appealing option than traditional mineral fillers when it comes to reducing vehicle weight. Due to their superior mechanical and thermal qualities, as well as their low carbon footprint, BC-filled plastic composites (BFPCs) play a significant role in the production of environmentally friendly materials. It was observed that either melt extrusion or injection molding are usually used to fabricate BFPC. It was observed that the properties of BFPCs are influenced by several factors such as the type and concentration of plastic, method of fabrication, the BC content, mixing uniformity of the mixture, wetting, and particle dispersion. Challenges of BFPCs were also discussed, such as the issue of particle agglomeration and poor interfacial bonding at high BC concentrations in the composite. Composites made from recycled polymers or biodegradable polymers can be developed to improve the composites’ overall sustainability.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42164244","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}
Pub Date : 2023-01-07DOI: 10.1088/2631-6331/acb135
Quanjin Ma, M. Merzuki, M. Rejab, M. Sani, Bo Zhang
It is a challenging target to improve the dynamic analysis and free vibration analysis of fiber metal laminates (FMLs) while providing great promise as lightweight structural components. FMLs have attracted increasing research interest in various multi-stack FML components to enlarge industrial applications. This review paper concentrates on the free vibration analysis of FMLs, which mainly refers to dynamic analysis, macro mechanical and micro mechanical approaches, and temperature effects. The available types of experimental vibration methods on FMLs are described. Moreover, dynamic analysis of FMLs is mainly reviewed in recent studies of FMLs on the macro mechanical and micromechanical scale aspects, and the temperature effect is also studied. Furthermore, several classical theoretical equations of different FMLs on free vibration analysis are summarized. In addition, optimization studies on FMLs under dynamic analysis are further discussed.
{"title":"A review of the dynamic analysis and free vibration analysis on fiber metal laminates (FMLs)","authors":"Quanjin Ma, M. Merzuki, M. Rejab, M. Sani, Bo Zhang","doi":"10.1088/2631-6331/acb135","DOIUrl":"https://doi.org/10.1088/2631-6331/acb135","url":null,"abstract":"It is a challenging target to improve the dynamic analysis and free vibration analysis of fiber metal laminates (FMLs) while providing great promise as lightweight structural components. FMLs have attracted increasing research interest in various multi-stack FML components to enlarge industrial applications. This review paper concentrates on the free vibration analysis of FMLs, which mainly refers to dynamic analysis, macro mechanical and micro mechanical approaches, and temperature effects. The available types of experimental vibration methods on FMLs are described. Moreover, dynamic analysis of FMLs is mainly reviewed in recent studies of FMLs on the macro mechanical and micromechanical scale aspects, and the temperature effect is also studied. Furthermore, several classical theoretical equations of different FMLs on free vibration analysis are summarized. In addition, optimization studies on FMLs under dynamic analysis are further discussed.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47665655","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}
Pub Date : 2023-01-06DOI: 10.1088/2631-6331/acb12a
M. Tank, Ana De Leon, Wentao Huang, Mitesh Patadia, Joshua Degraff, R. Sweat
Boron nitride nanotubes (BNNTs) are the perfect candidate for nanofillers in high-temperature multifunctional ceramics due to their high thermal stability, oxidation resistance, good mechanical properties, high thermal conductivity, and radiation shielding. In this paper, 3D printed ceramic nanocomposite with 0.1 wt% of BNNT was prepared by fusing it at high temperatures. Samples were built with three different print directions to study the effect of print layers on mechanical performance along with BNNT addition. Dynamic mechanical analysis is performed to study the length effect of nanoscale reinforcements on the mechanical properties of the printed ceramic composites reporting significant improvements up to 55% in bending strength and 72% in bending modulus with just 0.1 wt% BNNT addition. A 63% thermal diffusivity improvement of ceramic by adding BNNTs is observed using laser flash analysis. The bridging and pull-out effect of nanotubes with a longer aspect ratio was observed with high-resolution microscopy. Such composites’ modeling and simulation approaches are crucial for virtual testing and industrial applications. Understanding the effect of nanoscale synthetic fillers for 3D printed high-temperature ceramics can revolutionize future extreme environment structures.
{"title":"Manufacturing of stereolithographic 3D printed boron nitride nanotube-reinforced ceramic composites with improved thermal and mechanical performance","authors":"M. Tank, Ana De Leon, Wentao Huang, Mitesh Patadia, Joshua Degraff, R. Sweat","doi":"10.1088/2631-6331/acb12a","DOIUrl":"https://doi.org/10.1088/2631-6331/acb12a","url":null,"abstract":"Boron nitride nanotubes (BNNTs) are the perfect candidate for nanofillers in high-temperature multifunctional ceramics due to their high thermal stability, oxidation resistance, good mechanical properties, high thermal conductivity, and radiation shielding. In this paper, 3D printed ceramic nanocomposite with 0.1 wt% of BNNT was prepared by fusing it at high temperatures. Samples were built with three different print directions to study the effect of print layers on mechanical performance along with BNNT addition. Dynamic mechanical analysis is performed to study the length effect of nanoscale reinforcements on the mechanical properties of the printed ceramic composites reporting significant improvements up to 55% in bending strength and 72% in bending modulus with just 0.1 wt% BNNT addition. A 63% thermal diffusivity improvement of ceramic by adding BNNTs is observed using laser flash analysis. The bridging and pull-out effect of nanotubes with a longer aspect ratio was observed with high-resolution microscopy. Such composites’ modeling and simulation approaches are crucial for virtual testing and industrial applications. Understanding the effect of nanoscale synthetic fillers for 3D printed high-temperature ceramics can revolutionize future extreme environment structures.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41406436","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}
Pub Date : 2023-01-01DOI: 10.1088/2631-6331/acbf20
F. Al-Oqla, M. Hayajneh, M. E. Hoque
Facilitating finding low-cost renewable and sustainable environmental functional alternative materials for green products has been recently emphasized. Lignocellulosic materials are of such potential alternatives to enhance the modern cleaner production theme. In this work, several structural parameters, reinforcement conditions, and chemical treatments have been investigated to reveal their effects on the final desired mechanical performance of lignocellulosic corn/polyester composites for sustainable green products. Low-cost treatment solutions as sodium chloride, phosphoric and citric acids were considered for Mediterranean corn agro waste lignocellulosic fibers. Results have revealed that superior mechanical performance enhancements were occurred for the produced bio-composites. It was demonstrated that prepared composites were capable of enhancing the tensile strength as well as modulus for all types of treatment. About 157% tensile strength enhancement was achieved in case of 30 wt.% fiber content when treated with phosphoric and citric acids. Moreover, sodium chloride treatment was capable of achieving 81 MPa for the 20 wt.% fiber loading comparable to 54.7 MPa for the matrix. The modulus of elasticity property was also enhanced more than 600% for the untreated fibers and sodium chloride treated ones. This obviously demonstrates the potential of such low-cost fiber/low cost treatment synergy to fabricate potential green materials for sustainable industrial applications as well as enhance evaluating such materials from various technical stand points for the future sustainable cleaner production.
{"title":"Structural integrity and performance investigations of a novel chemically treated cellulosic paper corn/polyester sustainable biocomposites","authors":"F. Al-Oqla, M. Hayajneh, M. E. Hoque","doi":"10.1088/2631-6331/acbf20","DOIUrl":"https://doi.org/10.1088/2631-6331/acbf20","url":null,"abstract":"Facilitating finding low-cost renewable and sustainable environmental functional alternative materials for green products has been recently emphasized. Lignocellulosic materials are of such potential alternatives to enhance the modern cleaner production theme. In this work, several structural parameters, reinforcement conditions, and chemical treatments have been investigated to reveal their effects on the final desired mechanical performance of lignocellulosic corn/polyester composites for sustainable green products. Low-cost treatment solutions as sodium chloride, phosphoric and citric acids were considered for Mediterranean corn agro waste lignocellulosic fibers. Results have revealed that superior mechanical performance enhancements were occurred for the produced bio-composites. It was demonstrated that prepared composites were capable of enhancing the tensile strength as well as modulus for all types of treatment. About 157% tensile strength enhancement was achieved in case of 30 wt.% fiber content when treated with phosphoric and citric acids. Moreover, sodium chloride treatment was capable of achieving 81 MPa for the 20 wt.% fiber loading comparable to 54.7 MPa for the matrix. The modulus of elasticity property was also enhanced more than 600% for the untreated fibers and sodium chloride treated ones. This obviously demonstrates the potential of such low-cost fiber/low cost treatment synergy to fabricate potential green materials for sustainable industrial applications as well as enhance evaluating such materials from various technical stand points for the future sustainable cleaner production.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":"5 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"61184083","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}
Pub Date : 2023-01-01DOI: 10.1088/2631-6331/acc0d0
Praveen Kumar A, Quanjin Ma
The unique compressive behaviour of lattice cubic structures as well as their high specific strength and significant energy absorbing characteristics makes them an attractive solution for crashworthiness applications. Hence in this research study, the crashworthiness behaviour and energy absorbing characteristics of the thermoplastic polymer composite lattice cubic structures were experimentally investigated under quasi-static compression. Four design patterns such as Cuboctahedron, Kelvin cell, Truncated cube in square and dividend square geometrics were considered and fabricated through fused deposition modelling technique. The proposed structures were additively manufactured with four different thermoplastic polymer based filament materials and their influence on the crashworthiness characteristics were investigated experimentally. The obtained results revealed that the PLA-CF based KC configuration exhibited SEA of 2.50 kJ g−1 and the maximum value of CFE is 84.91% for PETG-CF based KC configuration. Furthermore, the experimental results indicated that the proposed thermoplastic polymer composite based lattice cubic structures are potentially a suitable component for crashworthiness applications owing to their significant energy absorption ability.
{"title":"Evaluation of energy absorption enhancement of additively manufactured polymer composite lattice structures","authors":"Praveen Kumar A, Quanjin Ma","doi":"10.1088/2631-6331/acc0d0","DOIUrl":"https://doi.org/10.1088/2631-6331/acc0d0","url":null,"abstract":"The unique compressive behaviour of lattice cubic structures as well as their high specific strength and significant energy absorbing characteristics makes them an attractive solution for crashworthiness applications. Hence in this research study, the crashworthiness behaviour and energy absorbing characteristics of the thermoplastic polymer composite lattice cubic structures were experimentally investigated under quasi-static compression. Four design patterns such as Cuboctahedron, Kelvin cell, Truncated cube in square and dividend square geometrics were considered and fabricated through fused deposition modelling technique. The proposed structures were additively manufactured with four different thermoplastic polymer based filament materials and their influence on the crashworthiness characteristics were investigated experimentally. The obtained results revealed that the PLA-CF based KC configuration exhibited SEA of 2.50 kJ g−1 and the maximum value of CFE is 84.91% for PETG-CF based KC configuration. Furthermore, the experimental results indicated that the proposed thermoplastic polymer composite based lattice cubic structures are potentially a suitable component for crashworthiness applications owing to their significant energy absorption ability.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":"5 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"61184152","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}
Pub Date : 2023-01-01DOI: 10.1088/2631-6331/acc0d1
T. Ibrahim, D. Yawas, Bashar Danasabe, A. A. Adebisi
Aluminum metal matrix composites have been gaining traction in recent years due to their good mechanical properties and low weight. Particulate reinforcements for the improvement of its properties have been explored. This research aimed to determine the optimal composition of the reinforcement content (pumice powder and carbonated coal particles) and processing parameters (stirring speed, processing temperature, and stirring time) on the thermal conductivity of the developed material and also to characterize the constituents using x-ray fluorescence, x-ray diffraction, and scanning electron microscope/energy dispersive x-ray. The Taguchi optimization approach and regression analysis were used for the optimization and statistical analysis, respectively. The Taguchi optimization results gave an optimum thermal conductivity of 111.5, 112.5, 111.7, 112.9, and 112.4 W m−1 °C for pumice, carbonated coal, stirring speed, processing temperature, and stirring time respectively. The optimization also revealed the optimum setting for reinforcements and stir casting process factors as regards thermal conductivity to be 2.5%, 5.0%, 300 rpm, 850 °C, and 5 min for pumice powder, carbonated coal particles, stirring speed, temperature, and time, respectively. The optimal thermal conductivity of 120.40 W m−1 °C was obtained for the hybrid composite which gives a 131.54% improvement over the conventional grey cast iron brake disc. The particulate reinforcements (pumice powder and carbonated coal particles) and the processing factors all had significant effects on the thermal conductivity of the material, with the carbonated coal particles having the highest percentage contribution of 16.51%, as established by the analysis of variance. A model for predicting the thermal conductivity was developed using regression analysis, and high prediction accuracy was established with R-Square, R-Square (adj), and R-Square (pred) values of 94.68%, 88.60%, and 79.94%, respectively. The results of the characterization show the presence of hard compounds such as silica, iron oxide, and alumina in pumice powder and carbonated coal particles.
近年来，铝金属基复合材料因其良好的力学性能和较轻的重量而受到越来越多的关注。研究了颗粒增强剂改善其性能的方法。本研究旨在确定增强量(浮石粉和碳化煤颗粒)的最佳组成和工艺参数(搅拌速度、加工温度和搅拌时间)对所制备材料导热性的影响，并利用x射线荧光、x射线衍射和扫描电镜/能量色散x射线对所制备材料的成分进行表征。采用田口优化法进行优化，采用回归分析进行统计分析。Taguchi优化结果表明，浮石、碳酸煤、搅拌速度、加工温度和搅拌时间的最佳导热系数分别为111.5、112.5、111.7、112.9和112.4 W m−1°C。优化结果表明，浮石粉、碳化煤颗粒、搅拌速度、搅拌温度、搅拌时间的最佳参数为2.5%、5.0%、300 rpm、850℃、5min。复合材料的最佳导热系数为120.40 W m−1°C，比传统灰口铸铁制动盘的导热系数提高了131.54%。颗粒增强剂(浮石粉和碳化煤颗粒)和加工因素对材料导热系数均有显著影响，其中碳化煤颗粒对材料导热系数的贡献率最高，达到16.51%。利用回归分析建立了导热系数预测模型，R-Square、R-Square (adj)和R-Square (pred)分别为94.68%、88.60%和79.94%，预测精度较高。表征结果表明，浮石粉和碳酸煤颗粒中存在二氧化硅、氧化铁和氧化铝等硬质化合物。
{"title":"Optimization and statistical modeling of the thermal conductivity of a pumice powder and carbonated coal particle hybrid reinforced aluminum metal matrix composite for brake disc application: a Taguchi approach","authors":"T. Ibrahim, D. Yawas, Bashar Danasabe, A. A. Adebisi","doi":"10.1088/2631-6331/acc0d1","DOIUrl":"https://doi.org/10.1088/2631-6331/acc0d1","url":null,"abstract":"Aluminum metal matrix composites have been gaining traction in recent years due to their good mechanical properties and low weight. Particulate reinforcements for the improvement of its properties have been explored. This research aimed to determine the optimal composition of the reinforcement content (pumice powder and carbonated coal particles) and processing parameters (stirring speed, processing temperature, and stirring time) on the thermal conductivity of the developed material and also to characterize the constituents using x-ray fluorescence, x-ray diffraction, and scanning electron microscope/energy dispersive x-ray. The Taguchi optimization approach and regression analysis were used for the optimization and statistical analysis, respectively. The Taguchi optimization results gave an optimum thermal conductivity of 111.5, 112.5, 111.7, 112.9, and 112.4 W m−1 °C for pumice, carbonated coal, stirring speed, processing temperature, and stirring time respectively. The optimization also revealed the optimum setting for reinforcements and stir casting process factors as regards thermal conductivity to be 2.5%, 5.0%, 300 rpm, 850 °C, and 5 min for pumice powder, carbonated coal particles, stirring speed, temperature, and time, respectively. The optimal thermal conductivity of 120.40 W m−1 °C was obtained for the hybrid composite which gives a 131.54% improvement over the conventional grey cast iron brake disc. The particulate reinforcements (pumice powder and carbonated coal particles) and the processing factors all had significant effects on the thermal conductivity of the material, with the carbonated coal particles having the highest percentage contribution of 16.51%, as established by the analysis of variance. A model for predicting the thermal conductivity was developed using regression analysis, and high prediction accuracy was established with R-Square, R-Square (adj), and R-Square (pred) values of 94.68%, 88.60%, and 79.94%, respectively. The results of the characterization show the presence of hard compounds such as silica, iron oxide, and alumina in pumice powder and carbonated coal particles.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":"5 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"61184835","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}
Pub Date : 2022-12-01DOI: 10.1088/2631-6331/acaa19
Donghan Lee, Sumin Cho, Sunmin Jang, Sung Jea Park, D. Choi
Recently, the demand for miniaturization and high sensitivity of the capacitive proximity sensors has increased noticeably for development of sensor networks. However, the volume and weight of conventional sensor devices are emerging as limitations in the practical application. In this paper, the stacked electrets-based highly sensitive noncontact capacitive sensor system (SENS) is proposed. The SENS is fabricated in compact-sized and light weight because electrets, which are dielectric materials that have quasi-permanent injected electric charges so can form external electric field, substitute the transmitter electrode and the external power source. Also, sensitivity of the SENS is effectively improved by stacking electrets. For experimental analysis, the electrostatic properties of the stacked electrets, which are due to the injected charges, and resultant influences on the sensitivity of the SENS are studied. In addition, based on experimental results, a proximity notification system with the SENS is developed using a LabVIEW program to demonstrate the practicality of the SENS.
{"title":"Development of highly sensitive capacitive proximity sensor based on stacked monocharged electrets","authors":"Donghan Lee, Sumin Cho, Sunmin Jang, Sung Jea Park, D. Choi","doi":"10.1088/2631-6331/acaa19","DOIUrl":"https://doi.org/10.1088/2631-6331/acaa19","url":null,"abstract":"Recently, the demand for miniaturization and high sensitivity of the capacitive proximity sensors has increased noticeably for development of sensor networks. However, the volume and weight of conventional sensor devices are emerging as limitations in the practical application. In this paper, the stacked electrets-based highly sensitive noncontact capacitive sensor system (SENS) is proposed. The SENS is fabricated in compact-sized and light weight because electrets, which are dielectric materials that have quasi-permanent injected electric charges so can form external electric field, substitute the transmitter electrode and the external power source. Also, sensitivity of the SENS is effectively improved by stacking electrets. For experimental analysis, the electrostatic properties of the stacked electrets, which are due to the injected charges, and resultant influences on the sensitivity of the SENS are studied. In addition, based on experimental results, a proximity notification system with the SENS is developed using a LabVIEW program to demonstrate the practicality of the SENS.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47975348","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}
Pub Date : 2022-11-30DOI: 10.1088/2631-6331/aca753
Diwakar Singh, Raj Kumar, R. Vaish
Representative volume element (RVE) based finite element method is employed to evaluate all the effective properties of electrostrictive composite. The attention is paid to designing the periodic boundary conditions to be applied to RVEs of electrostrictive study. The present study is conducted on particulate and fiber electrostrictive composites, in which electrostrictive ceramic (Pb(Mg1/3Nb2/3)O3-PbTO3- BaTiO3, PMN-PT-BT) is embedded into a non electrostrictive polymer (epoxy) matrix. In particulate composite, the spherical particles are randomly distributed and in fiber composites, cylindrical fibers are arranged in a square and hexagonal pattern. The study reveals that the electrostrictive composite does not only depends on the inclusion’s volume but also on their microstructure. The electrostrictive coefficient of the proposed composite is more than its constituent materials owing to the auxiliary flexibility of polymer matrix.
{"title":"Finite element-based homogenization model to determine effective properties of 0–3 and 1–3 electrostrictive composite","authors":"Diwakar Singh, Raj Kumar, R. Vaish","doi":"10.1088/2631-6331/aca753","DOIUrl":"https://doi.org/10.1088/2631-6331/aca753","url":null,"abstract":"Representative volume element (RVE) based finite element method is employed to evaluate all the effective properties of electrostrictive composite. The attention is paid to designing the periodic boundary conditions to be applied to RVEs of electrostrictive study. The present study is conducted on particulate and fiber electrostrictive composites, in which electrostrictive ceramic (Pb(Mg1/3Nb2/3)O3-PbTO3- BaTiO3, PMN-PT-BT) is embedded into a non electrostrictive polymer (epoxy) matrix. In particulate composite, the spherical particles are randomly distributed and in fiber composites, cylindrical fibers are arranged in a square and hexagonal pattern. The study reveals that the electrostrictive composite does not only depends on the inclusion’s volume but also on their microstructure. The electrostrictive coefficient of the proposed composite is more than its constituent materials owing to the auxiliary flexibility of polymer matrix.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48719474","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}
Pub Date : 2022-11-29DOI: 10.1088/2631-6331/aca74f
Dongchan Yi, Gwajeong Jeong, S. Park, M. Yoo, Hyunseung Yang
There has been a growing interest in developing carbon-based polymer composites for electromagnetic interference (EMI) shielding materials. To achieve a high EMI shielding performance, the morphology of fillers in composites must be controlled. Although carbon fibers (CFs) have remarkable thermal and electrical properties and low density, their poor dispersion behavior within polymer matrix limits their practical applications as EMI shielding materials. In this study, we report an efficient method to disperse CFs within a thermoplastic polyurethane (TPU) matrix using pyranine-functionalized polyether (polyether–pyranine) as a dispersing agent. polyether–pyranine was grafted on the CF surfaces through π–π interactions between the CF and pyranine groups to produce surface-modified CFs (SCFs). Compared to CFs, the SCFs exhibited an improved dispersion stability within a TPU polymer matrix. Furthermore, a TPU composite with SCFs achieved an enhanced electrical conductivity and EMI shielding performance, which was primarily ascribed to the increased structural connectivity between the SCFs due to excellent dispersion.
{"title":"Surface-modified carbon fiber for enhanced electromagnetic interference shielding performance in thermoplastic polyurethane composites","authors":"Dongchan Yi, Gwajeong Jeong, S. Park, M. Yoo, Hyunseung Yang","doi":"10.1088/2631-6331/aca74f","DOIUrl":"https://doi.org/10.1088/2631-6331/aca74f","url":null,"abstract":"There has been a growing interest in developing carbon-based polymer composites for electromagnetic interference (EMI) shielding materials. To achieve a high EMI shielding performance, the morphology of fillers in composites must be controlled. Although carbon fibers (CFs) have remarkable thermal and electrical properties and low density, their poor dispersion behavior within polymer matrix limits their practical applications as EMI shielding materials. In this study, we report an efficient method to disperse CFs within a thermoplastic polyurethane (TPU) matrix using pyranine-functionalized polyether (polyether–pyranine) as a dispersing agent. polyether–pyranine was grafted on the CF surfaces through π–π interactions between the CF and pyranine groups to produce surface-modified CFs (SCFs). Compared to CFs, the SCFs exhibited an improved dispersion stability within a TPU polymer matrix. Furthermore, a TPU composite with SCFs achieved an enhanced electrical conductivity and EMI shielding performance, which was primarily ascribed to the increased structural connectivity between the SCFs due to excellent dispersion.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2022-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42546302","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}
Pub Date : 2022-11-20DOI: 10.1088/2631-6331/aca461
А. Larionov, А. Dikov, S. O. Akayev, L. Dikova, Е. Zhakanbayev, К. B. Sarsenbaeva
Way for applying tantalum coating with a given structure to the surface of an alloy with a shape memory effect NiTi to increase the biocompatibility of implants from this alloy is presented. The coating was synthesized by direct current (DC) magnetron sputtering. The changes sequence of the structural-phase states depending on the thickness of the coating, that is, the rate of its deposition, has been established. It is shown that at a low magnetron power, ∼14 W in present study, a single-phase α-Ta coating with a bcc structure and a high degree of perfection of the crystal lattice is successfully synthesized on the titanium nickelide surface.
{"title":"Formation of tantalum coatings with a given structure on the surface of niti alloy by magnetron sputter deposition","authors":"А. Larionov, А. Dikov, S. O. Akayev, L. Dikova, Е. Zhakanbayev, К. B. Sarsenbaeva","doi":"10.1088/2631-6331/aca461","DOIUrl":"https://doi.org/10.1088/2631-6331/aca461","url":null,"abstract":"Way for applying tantalum coating with a given structure to the surface of an alloy with a shape memory effect NiTi to increase the biocompatibility of implants from this alloy is presented. The coating was synthesized by direct current (DC) magnetron sputtering. The changes sequence of the structural-phase states depending on the thickness of the coating, that is, the rate of its deposition, has been established. It is shown that at a low magnetron power, ∼14 W in present study, a single-phase α-Ta coating with a bcc structure and a high degree of perfection of the crystal lattice is successfully synthesized on the titanium nickelide surface.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2022-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48282100","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}
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