Article
Materials Science, Composites
Hongchao Lu, Zhenghao Xia, Xuejing Zheng, Qinyong Mi, Jinming Zhang, Yan Zhou, Chunchun Yin, Jun Zhang
Summary: The study has successfully prepared cellulose/MWCNT nanocomposites with excellent thermal and electrical conductivity, which can meet design requirements and be fabricated into special shapes and sizes of electronic devices through a simple process.
COMPOSITES COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Sahar Shahparvar, Abbas Zarei-Hanzaki, Amirhossein Farahani, Roohollah Bagherzadeh, Hamid Reza Abedi
Summary: This study investigates the production of nanocomposites with an optimal percentage of modified nanoparticles. By applying a suitable thermomechanical process and adding the right percentage of particles, the crystallinity and electrical properties of the nanocomposites can be significantly improved.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Multidisciplinary
Ilaria Ragazzini, Riccardo Castagnoli, Isacco Gualandi, Maria Cristina Cassani, Daniele Nanni, Francesca Gambassi, Erika Scavetta, Elena Bernardi, Barbara Ballarin
Summary: Ambient humidity is an important parameter that affects the manufacturing and storage of industrial and agricultural goods. This paper reports the development of a low-cost humidity sensor made of cellulose and polyaniline, which shows similar performance to a commercial sensor. The sensor has potential applications in agriculture, food monitoring, and medical and industrial environments.
Article
Engineering, Chemical
Hattab Youcef, Benharrats Nacera
Summary: Polymer-clay nanocomposites have been extensively studied for more than a decade due to their various applications, including UV photodegradation of dyes, lithium nanopolymer batteries, and petroleum pipeline corrosion protection. In this study, montmorillonite clay was intercalated into a polymer structure using hexadecyltrimethylammonium bromide. The nanocomposite was characterized in terms of its structural, electrical, and thermal properties, and the effect of photodegradation on the nanocomposite was assessed under sunlight and UV radiation. The results highlighted the excellent barrier properties of the nanocomposite attributed to the clay component.
CHEMICAL ENGINEERING & TECHNOLOGY
(2023)
Article
Materials Science, Composites
Zuwei Fu, Qionghai Chen, Junwei He, Sai Li, Rui Ming, Yuan Wei, Yihui Xu, Jun Liu, Liqun Zhang
Summary: Flexible conductive composites have attracted attention as wearable strain sensors in various application fields. However, tear and fracture present challenges to their performance stability. This study presents a novel methodology for fabricating a conductive silicone elastomer composite with self-healing properties. By introducing modified fillers, the resulting composite demonstrates significant electrical conductivity and self-healing capabilities, making it suitable for sensor applications.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Muqun Wang, Yuxuan Qin, Wei Gao, Shaofeng Liang
Summary: This study explores the preparation method of high-performance electromagnetic shielding materials, such as polymer-based materials mixed with MWCNT/MCHMs to prepare composites, and investigates the effect of different filler contents on their properties. The results show that increasing the filler content can enhance the electrical conductivity and electromagnetic shielding effectiveness of the composite materials.
Article
Chemistry, Physical
James Nyakuchena, Sarah Ostresh, Jens Neu, Daniel Streater, Claire Cody, Reagan Hooper, Xiaoyi Zhang, Benjamin Reinhart, Gary W. Brudvig, Jier Huang
Summary: We conducted a systematic study on the correlation between the metal nodes and the structure, photophysical property, and photoconductivity of M-THQ conducting MOFs (M = Fe, Ni, Cu, and Zn; THQ = tetra-hydroxybenzoquinone). Our findings show that the metal node identity controls the structural preference in these MOFs, with Cu prefering a square planar coordination and leading to a 2D Kagome-type structure, and Fe, Ni, and Zn prefering an octahedral sphere and leading to a 3D structure. Fe-THQ exhibited the smallest band gap and highest photoconduction due to its long-lived ligand-to-metal charge transfer state and mixed valence state. Our results demonstrate the importance of the metal node in tuning the photophysical and photocatalytic properties of MOFs.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Marius Chereches, Dana Bejan, Elena Ionela Chereches, Alina Adriana Minea
Summary: The aim of this research is to study the influence of MWCNTs nanoparticles on the thermophysical properties and structure of polyethylene glycol PEG 400. The experimental results show that the samples have good electrical properties, while the viscosity increases with the addition of MWCNTs. The melting and phase transitions were explored, and the relationship between the experimental outcomes and the literature values was discussed.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Nanoscience & Nanotechnology
Yu Feng Bai, Huizhi Yang, Chunhua Ge, Lili He, Qingyan Song, Xiangdong Zhang
Summary: This study reports an in situ preparation of HO-BNNS@PANI composite, which exhibits excellent electrical and thermal conductivity without compromising the pH responsiveness of PANI. Moreover, the actiniae-like structure of the composite improves ion diffusion capability and reaction area.
Article
Chemistry, Physical
Zhiming Liang, Hyun Ho Choi, Xuyi Luo, Tuo Liu, Ashkan Abtahi, Uma Shantini Ramasamy, J. Andrew Hitron, Kyle N. Baustert, Jacob L. Hempel, Alex M. Boehm, Armin Ansary, Douglas R. Strachan, Jianguo Mei, Chad Risko, Vitaly Podzorov, Kenneth R. Graham
Summary: It has been shown through Seebeck coefficient and Hall effect measurements that mobile electrons play a significant role in charge-carrier transport in p-conjugated polymers heavily p-doped with strong electron acceptors. Doping with oxidizing agents eliminates the transport gap at high doping concentrations, indicating a promising route to high-performance n-type organic thermoelectric materials.
Article
Engineering, Manufacturing
Jianwei Zhou, Zhongxun Yu, Yarong Lv, Ce Wang, Ping Hu, Yong Liu
Summary: This study proposes a novel strategy to construct thermally conductive networks using boron nitride nanosheets-multiwalled carbon nanotubes/poly(vinyl alcohol) nanocomposites. The resulting nanocomposites exhibit excellent in-plane thermal conductivity and heat dissipation capacity, providing inspiration for the preparation of composites with high thermal conductivity.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Chemistry, Multidisciplinary
Darya Meisak, Jan Macutkevic, Algirdas Selskis, Polina Kuzhir, Juras Banys
Summary: The dielectric and electric properties of Ni@C/epoxy composites and Ni@C/MWCNTs/epoxy composites were investigated over a wide frequency and temperature range. The addition of Ni@C nanoparticles can enhance the dielectric permittivity and electrical conductivity of the composites, but within a certain concentration range. Furthermore, in hybrid composites, the synergy effects of Ni@C and MWCNTs can significantly enhance the conductivity.
Article
Engineering, Environmental
Xiaofen Yang, Baoxin Fan, Xinxin Wang, Xi Tang, Jinglin Wang, Guoxiu Tong, Xiaojuan Wang, Weifu Tian
Summary: High-performance absorbers are urgently needed to address the increasing electromagnetic wave pollution resulting from the rapid development of information technology. A simple SDS/HCl-assisted oxidative polymerization method was developed to synthesize nanorod-coated PANI hierarchical microtubes with controllable morphology evolution and excellent electromagnetic wave absorption properties. The PANI hierarchical microtubes with tunable morphology and conductivity offer great promise for various fields such as sensors, electronics, optics, catalysis, energy storage, and EMW absorption and shielding.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Zhaoshun Zhan, Li Wang, Ran Duan, Qixing Shi, Jinfeng Shen, Shihan Weng, Xing Wang, Lina Yan, Baoyong Zhang, Lixin Li
Summary: In this study, a novel hybrid FR-PANI@Fe3O4@NC was designed to achieve flame resistance and electrical conductivity of PMMA by fabricating an ordered structure. By controlling the added volume at 20 wt%, the FR-PANI@Fe3O4@NC hybrid reduced the electrical resistivity of the PMMA composite to 8.9 k Omega.cm(-1). Moreover, the PMMA composite showed significant fire resistance with an LOI of 27.4% and a V-0 rating in the UL-94 test. The FR-PANI@Fe3O4@NC hybrid improved the thermal stability and fire behavior of the PMMA composite by promoting the formation of char residue. The flame-retardant mechanism of the hybrid was deduced to involve the generation of phosphorus-containing compounds that promote the dehydration reaction of the PMMA matrix.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Multidisciplinary
Yun-Seok Jun, Byung Gwan Hyun, Mahdi Hamidinejad, Saeed Habibpour, Aiping Yu, Chul B. Park
Summary: The study demonstrates that by using an industrially viable technique, highly stretchable and conductive MWCNT/TPU composite foams can be fabricated, which effectively suppress the increase in electrical resistance with stretching and maintain a constant level of electrical conductivity.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Engineering, Manufacturing
Sota Oshima, Ryo Higuchi, Masaya Kato, Shu Minakuchi, Tomohiro Yokozeki, Takahira Aoki
Summary: This study investigated the effect of cooling rates on the crystallization, thermomechanical, and fracture properties of PPS and CF/PPS. The results showed that slow cooling rates led to high crystallinity, increasing the elastic modulus and yield stress but decreasing strength and fracture toughness. In neat resin, a transition from brittle to ductile fractures occurred between 1 and 10 degrees C/min, significantly increasing fracture toughness. However, CF/PPS fracture toughness was less affected by cooling rate and significantly lower than that of neat PPS due to weak fiber/matrix bonding.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Materials Science, Composites
Saki Hasebe, Ryo Higuchi, Tomohiro Yokozeki, Shin-ichi Takeda
Summary: This study develops a decision tree based multi-task learning scheme to predict impact damage information solely from an external surface profile. Through low-velocity impact tests and damage measurement, a dataset is created to investigate the correlations between impact damage and impact conditions. The results infer that multi-task learning has advantages in prediction accuracy and model plausibility.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Aerospace
Kensuke Soneda, Tomohiro Yokozeki, Taro Imamura, Natsuki Tsushima
Summary: This paper proposes an efficient aeroelastic model for morphing structures with corrugated panels, combining different fidelities of aerodynamic models. The influence of model fidelity on simulation results is studied through three different morphing cases simulated with two fidelities of aeroelastic models. Based on the comparison study, a new efficient aeroelastic model is proposed, which speeds up the calculations while maintaining the computational accuracy.
JOURNAL OF AIRCRAFT
(2023)
Article
Chemistry, Physical
Pallvi Dariyal, Bhanu Pratap Singh, Gaurav Singh Chauhan, Manoj Sehrawat, Sushant Sharma, Ashok Kumar, Sanjay Ranganth Dhakate
Summary: A novel precursor purging system for synthesis of carbon nanotubes with uniform diameter distribution is designed and examined. The synthesized carbon nanotubes exhibit low sulphur impurities and high electrical conductivity, making them suitable for various high-profile applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Mamta Rani, Manoj Sehrawat, Rashmi Rani, Bhasker Gahtori, Bhanu Pratap Singh
Summary: Increasing the interfaces of carbon nanotube buckypaper improves its mechanical load transfer ability, but also increases contact resistance and retards the increase in electrical conductivity. Chemical functionalization, doping, and densifying have shown positive results but still fall short of the physical attributes of individual nanotubes. In this study, the amount of surfactant was controlled during the preparation of buckypaper to manipulate its mechanical and electrical properties. The prepared buckypapers exhibited high crystallinity and lower defects, and the interplay between surfactant and physical parameters affected the dispersion forces and interface contact among nanotubes. The buckypaper with the lowest surfactant content had the highest electrical conductivity (91.74 S/cm), which was twice that of the buckypaper with the highest surfactant content. Moreover, the tensile strength of the buckypaper showed a 104% improvement with the control of surfactant concentration, indicating the viability and importance of this study for further buckypaper development.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Ruchi K. Sharma, Avritti Srivastava, Premshila Kumari, Deepak Sharma, J. S. Tawale, Ved Varun Agrawal, Bhanu Pratap Singh, Pathi Prathap, Sanjay K. Srivastava
Summary: The properties of PEDOT:PSS have been improved by incorporating graphene oxide (GO), resulting in a high-efficiency hole transport layer (HTL) for PEDOT:PSS/n-Si hybrid solar cells (HSCs). The addition of a small amount of GO enhances the structural, electrical, and Si surface passivation properties of PEDOT:PSS, leading to improved photovoltaic performance of PEDOT:PSS-GO/n-Si HSCs. The study shows that the oxygen functional groups on the surface of 2D-GO sheets interact with PEDOT:PSS, significantly increasing its electrical conductivity by more than two times without impacting its optical properties. Additionally, the composite film effectively passivates the n-Si surface, resulting in a 1.7-fold increase in minority carrier lifetime. PEDOT:PSS-GO/n-Si HSCs achieved a highest power conversion efficiency (PCE) of 11.22% on a device dimension of 1 cm2, which is 4.14% higher than that of pristine PEDOT:PSS. This improvement is attributed to the enhanced charge transport properties of PEDOT:PSS-GO, interface passivation, and efficient separation and collection of photo-carriers with optimum GO addition. The study demonstrates that PEDOT:PSS-GO composite can be an effective HTL for efficient PEDOT:PSS/n-Si HSCs.
SURFACES AND INTERFACES
(2023)
Article
Mechanics
Ryoma Aoki, Ryo Higuchi, Tomohiro Yokozeki
Summary: In this study, open-hole tensile fatigue tests were conducted on carbon-fiber-reinforced polymer laminates using thin-ply prepregs to investigate the effects of varying ply thickness. Fatigue damage growth around a circular hole was evaluated through X-ray radiography, and the effect of fatigue damage on residual strength was assessed through static tensile tests. The results demonstrated that thin-ply laminates can suppress fatigue damage growth and retain residual strength under high-cycle fatigue, confirming their superiority over thick-ply laminates.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Manufacturing
Sushant Sharma, Bhanu Pratap Singh, Seung Hyun Hur, Won Mook Choi, Jin Suk Chung
Summary: In this study, a unique method of water vapor-induced phase separation is used to prepare a microcellular stucture of stacked rGO/MoS2 reinforced TPU foam. The hydrothermally prepared rGO/MoS2 heterostructure prevents restacking and effectively reinforces the TPU system. The foam shows enhanced shielding performance, excellent wave attenuation, and outstanding absorption effect, as well as improved thermomechanical and tensile properties, making it suitable for practical applications.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Materials Science, Composites
Toshio Ogasawara, Tomoisa Mikami, Kota Takamoto, Kenji Asakawa, Kazuyuki Aoki, Shigekazu Uchiyama, Sunao Sugimoto, Tomohiro Yokozeki
Summary: Through experiments, this study found that the ply thickness has an effect on the filled hole compression (FHC) strength. The FHC strength of quasi-isotropic (QI) laminates increased by 26-45% as the ply thickness decreased from 0.2 to 0.05 mm. The FHC strength was higher for QI laminates with a tightening torque of 7.0 Nm compared to 0 Nm. In addition, the FHC strength of thin-ply QI-CFRP (0.05 mm ply thickness) at a fastener tightening torque of 7 Nm was greater than the un-notched compressive (UNC) strength.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Polymer Science
Sangita Tripathy, Bhanu Pratap Singh, Sanair Massafra de Oliveira, Alexei Kuznetsov, Joyce Rodrigues de Araujo, Sam Gnaniah, S. R. Dhakate
Summary: In this study, uniformly dispersed graphene oxide/polyamide-6 nanocomposites were prepared using a double extrusion and injection molding method. Tensile measurements and DSC analysis showed that the addition of graphene oxide significantly improved the mechanical and thermal performance of the composites.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
Yu Zhou, Yayoi Kobayashi, Yuichiro Matsuzaki, Keizo Matsumoto, Tomohiro Yokozeki
Summary: This study presents a novel two-step SWCM process for fabricating integral thermosetting CFRP tubular-bar structure elements, which could be further drilled into a tubular-lug structural element. The SWCM technique has minor influence on the curing of the epoxy prepregs, and the mechanical characteristics of SWCM specimens are much superior to those of control autoclave samples. The investigation of morphology provides a discussion and assumptions regarding the enhancement mechanism, and the study provides a valuable guideline for designing and fabricating tubular-lug structural components.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Animesh Pandey, Reena Yadav, Sahil Verma, Mandeep Kaur, Bhanu P. Singh, Sudhir Husale
Summary: The study demonstrates the assembly of gold nano-islands and quantum dots on a flexible lightweight multiwall carbon nanotube paper using a simple thermal annealing method. This method allows for the high-density and large-scale production of nanoparticles. Integrating novel metals with flexible carbon-based nanomaterials results in a specimen for SEM resolution studies and a promising photodetector for NIR laser irradiation.
Article
Mechanics
Ryo Higuchi, Tomohiro Yokozeki, Masahiko Matsuhashi, Aki Imaoku, Takuya Yamamoto, Yoshihiro Ohnishi, Tatsuo Sakakibara
Summary: This study investigates the mechanism of vibration damping in woven composite structures through numerical simulations. The results show that the fiber volume fraction, braided angle, and out-of-plane waviness have significant effects on the vibration properties, with larger braided angles providing the best damping properties.
COMPOSITE STRUCTURES
(2023)
Article
Polymer Science
Jeevan Jyoti, Gaurav Singh Chauhan, Seunghwa Yang, Surya Kant Tripathi, Ki Hyeon Kim, Manjit Sandhu, Bhanu Pratap Singh
Summary: In this paper, stretchable and lightweight multiwall carbon nanotube (MWCNTs)/thermoplastic polyurethane (TPU) composites were prepared using double extrusion and solvent casting techniques. The composites showed enhanced interaction between MWCNTs and TPU. The electrical properties, electromagnetic interference (EMI) shielding, and dynamic mechanical analysis of the composites were studied. The composites exhibited excellent EMI shielding performance, making them suitable for use in next-generation defense and electronic devices industries.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Sony Bharadwaj, Tejendra K. Gupta, Gaurav Singh Chauhan, Manoj Sehrawat, Ashok Kumar, S. R. Dhakate, Bhanu Pratap Singh
Summary: High flexibility and ultra-sensitivity of electrically conductive polymer nanocomposites make them attractive for high performance strain sensors. In this study, flexible and conductive nanocomposite strain sensors based on thermoplastic polyurethane (TPU) were prepared by adding long-length multiwalled carbon nanotubes (MWCNTs) with low percolation threshold. The addition of MWCNTs enhanced the dispersibility in TPU matrix and improved the strain sensing performance. The nanocomposites exhibited low percolation, high gauge factor, good recoverability and reproducibility, making them appealing for various applications in human motion monitoring.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
