Article
Materials Science, Multidisciplinary
Zhenhao Xu, Guangshan Zhuang, Xiaodan Xu, Chengjuan Wang, Yapeng Wang, Haotian Jiang, Mengfan Li, Hongxue Tan, Yanxiang Wang
Summary: This article presents a one-step method for growing carbon nanotubes (CNTs) on carbon fibers (CFs) using Fe-Ni bimetallic catalysts in a chemical vapor deposition (CVD) furnace at low temperatures. By controlling the CVD process at 550 degrees C, 3.5 cm/min, and 0.45:0.30 L/min hydrogen to acetylene gas ratio, the best surface morphology and a tensile strength of 4.55 GPa were achieved, which is 6.56% higher compared to Desized CFs. Moreover, the bond strength of CF and resin was significantly improved under the optimal process, and the grown CNTs showed good coaxiality and wall uniformity, enhancing the performance of CNTs/CFs.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Polymer Science
Jiayi Wang, Lifeng Chen, Wei Shen, Lvtao Zhu
Summary: As the tensile strength increases, the response speed of midpoint deformation increases, the thread deformation mode changes from overall deformation to partial deformation, and the localized effect increases, accompanied by severe matrix and fiber fracture failure; the thread energy dissipation ratio ascends with increasing pull-off strength and exhibits three distinct stages, i.e., elastic deformation, central fracture, and complete failure, which are directly related to the structural failure mode.
Article
Materials Science, Multidisciplinary
Xiaochen Wu, Lu Li, Wenhao Wang, Ruixiao Zheng, Cuiyun Liu, Guodong Li, Chaoli Ma
Summary: The study shows that the efficient preparation of high-textured pyrolytic carbon (PyC) coatings on SiC fibers can be achieved using chemical vapor deposition (CVD) technique. By controlling the deposition parameters, different textures of PyC can be obtained. High-textured PyC can be stably synthesized at 1150°C and 10-20 kPa, while the textures vary at a higher temperature. The thickness of PyC coatings also plays a critical role in the tensile properties of SiC fibers.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Ceramics
Ziming Ma, Yanxiang Wang, Jianjie Qin, Zhiqiang Yao, Xuanhao Cui, Bowen Cui, Yang Yue, Yongbo Wang, Chengguo Wang
Summary: This study proposes a method of growing carbon nanotubes on carbon fibers at low temperatures using iron and nickel catalysts in a vacuum CVD furnace. The Fe-Ni catalysts demonstrate better performance in enhancing the mechanical properties of carbon fibers and bonding strength with resins compared to single metal catalysts.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Chemical
Manishkumar D. Yadav, Kinshuk Dasgupta
Summary: The kinetics of formation of carbon nanotube aerogel (CNT-a) by thermocatalytic decomposition of ethanol using ferrocene and thiophene as catalyst and promoter has been studied. It was found that the irreversible dissociation of adsorbed ethanol followed by the decomposition of adsorbed ethyl group is the rate limiting step for the formation of CNT-a. Additionally, the atomic ratios of Fe/S and Fe/C were found to have profound effects on the type of carbon nanotubes present in CNT-a.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Polymer Science
Mengyu Cao, Tianqi Cui, Yuhang Yue, Chaoyu Li, Xue Guo, Xin Jia, Baojin Wang
Summary: The study investigated the effect of carbon fibers on the tensile properties of FDM-printed PLA specimens, revealing that the introduction of carbon fibers led to improvements in crystalline structure and mechanical properties of PLA, although the tensile strength decreased.
Article
Materials Science, Textiles
Huiting Zhai, Ting Chen
Summary: The gas flow field in a chemical vapor deposition reactor is simulated using computational fluid dynamics software to explore the motion of carbon nanotube fibers. The bead-rod fiber model is used for dynamic analysis of the fibers in the gas flow field. Numerical simulation is used to simulate fiber motion by incorporating gas velocity into the fiber dynamics equation. Through iterative computation, the instantaneous motion state and trajectory of the fibers in the reactor are obtained. The simulation results are consistent with motion diffraction photos and explain the cause of the 'sock' structure in the preparation process of carbon nanotube fibers. This research shows great potential for understanding the forming mechanism of carbon nanotube fibers.
JOURNAL OF THE TEXTILE INSTITUTE
(2023)
Article
Polymer Science
Salem Al Zahmi, Saif Alhammadi, Amged ElHassan, Waleed Ahmed
Summary: Due to its exceptional properties, such as high-temperature resistance and mechanical characteristics, as well as relatively lower price, the demand for carbon fiber has been increasing. However, this increasing demand has also created a waste recycling problem. To address this issue, this research aims to produce a recycled composite made from different carbon fiber leftover resources to reinforce the growing demand for materials. The recycled composites are tested and analyzed to study their thermal properties.
Article
Materials Science, Multidisciplinary
Yupeng Diao, Luchun Yan, Kewei Gao
Summary: Machine learning algorithms were used to establish prediction models for improving the mechanical properties of carbon steels. Key descriptors were identified for tensile strength and elongation, and prediction models were developed based on these descriptors. A multi-objective optimization strategy was proposed to optimize two mutually exclusive mechanical properties.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
John S. Bulmer, Arthur W. N. Sloan, Michael Glerum, Jennifer Carpena-Nunez, Robert Waelder, Jefford Humes, Adam M. Boies, Matteo Pasquali, Rahul Rao, Benji Maruyama
Summary: This study explores various parameters of the FC-CVD reactor and successfully controls the diameter of SWCNTs. The research finds that oxidative influences result in smaller CNT diameters, while increasing temperature leads to larger diameters.
Article
Chemistry, Multidisciplinary
Jingjing Si, Jinqiu Yu, Haihu Lan, Lixin Niu, Jingrui Luo, Yantao Yu, Linyang Li, Yu Ding, Lei Fu, Mengqi Zeng
Summary: This study demonstrates a chemical potential-modulated strategy to precisely synthesize various ultrahigh-phase-purity ultrathin transition-metal boride single crystals. The ultrathin crystals exhibit exceptional mechanical properties, such as an ultrahigh Young's modulus. This research provides a platform for synthesizing ultrathin single crystals with ultrahigh phase purity and enables extensive research and applications.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Editorial Material
Materials Science, Multidisciplinary
Chunxue Li, Ruilong Jia, Yingkui Yang, Guangfu Liao
Summary: Obtaining mechanically robust grafts and effectively integrating them with host bone to tolerate high loads during joint motions are crucial and challenging for the optimal functional recovery of force-transmitting connective tissues. Recent research proposes that a hierarchical helical carbon nanotube fiber, which has high mechanical strength and can integrate with host bone and restore movement in animals, is a promising artificial ligament. This research represents a significant development in the field of artificial ligaments through the innovative utilization of hierarchical helical carbon nanotube fiber.
ADVANCED FIBER MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jia Lin, Hua Jin, Xiaohong Ge, Yihang Yang, Guimei Huang, Jinhuo Wang, Fenqiang Li, Hui Li, Shuai Wang
Summary: CNTs were successfully synthesized on refractory metal diborides (HfB2, ZrB2, and TiB2) via CVD with Ni as the catalyst at about 850-1200 degrees C. The obtained powders were densified via SPS at 1400-1700 degrees C to obtain a composite. The optimal strength and toughness were found for TiB2-Ni-CNT composites. Uniform dispersion of CNTs in the boride matrix contributed to further enhancement of mechanical properties.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Materials Science, Textiles
Xiaoxiao Wei, Mohamed Amine Aouraghe, Shasha Pang, Farial Islam Farha, Sidra Saleemi, Kun Zhang, Wei Liu, Fujun Xu
Summary: This study presents a highly stretchable and stable electro-conductive yarn by wrapping carbon nanotube yarn on a multifilament polyester yarn. The wrapping yarn shows significantly higher tensile force and strain compared to pristine carbon nanotube yarn, and exhibits minimal resistance changes after cyclic loading. It also demonstrates steady-state temperature and quick electro-thermal response when voltage is applied. This wrapping yarn retains its electro-thermal stability under various deformations when sewn into gloves.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Chemistry, Multidisciplinary
Kenan Muhamedagic, Lucijano Berus, David Potocnik, Ahmet Cekic, Derzija Begic-Hajdarevic, Maida Cohodar Husic, Mirko Ficko
Summary: Reinforcing polymers with nanoparticles and fibers improves their mechanical, thermal, and electrical properties, making them suitable for industrial applications in functional parts produced by the FDM process. This paper focuses on analyzing the influential process parameters on tensile strength and applies RSM and ANN statistical methods to investigate the effects of layer thickness, printing speed, raster angle, and wall thickness on the tensile strength of short carbon fiber reinforced polyamide composite test specimens. The results show that layer thickness and raster angle have the most significant influence on tensile strength. Machine learning techniques are also employed, and the best configuration is determined based on the lowest MAE and MSE test sample result, demonstrating the usefulness of the proposed model in predicting tensile strength.
APPLIED SCIENCES-BASEL
(2022)