Article
Materials Science, Multidisciplinary
Feng Bao, Zhixin Dong, Ran Zhang, Fuling Qi, Xuemin Dai, Xuepeng Qiu
Summary: By incorporating HBOA as the third monomer, high-performance PI fibers with excellent thermal stability and mechanical properties were successfully fabricated. The co-PI fibers exhibited optimal mechanical properties at a suitable PRM/HBOA molar ratio. The relationship between structure and mechanical property was also studied.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Robert Mueller, Martin Lorenz, Alexander Veber, Roman Sajzew, Andre Kalide, Jens Kobelke, Anka Schwuchow, Luukas Kuusela, Lothar Wondraczek, Laetitia Petit, Katrin Wondraczek
Summary: In this study, silicate glass containing crystals were prepared by melting a mixture of YbPO4 xenotime structured crystals and SiO2 nanoparticles. The mixture was used to prepare large volume core preforms for laser active optical fiber. The integrity of the crystals in the preform and fiber were assessed through temperature dependent sintering and fiber drawing experiments. The survival of YbPO4 crystalline particles in silica was investigated using various techniques, showing that the particles withstand the high-temperature steps during the fiber fabrication process. However, partial decomposition of the crystals was observed during the fiber fabrication.
OPTICAL MATERIALS EXPRESS
(2023)
Review
Materials Science, Multidisciplinary
Kunming Li, Xuepeng Ni, Qianqian Wu, Chunshun Yuan, Changlei Li, Dong Li, Huifang Chen, Yonggen Lv, Anqi Ju
Summary: This paper reviews the current status of carbon-based fibers (CBFs), including their precursors, preparation methods, performance, and applications. The different types of precursor systems are discussed, and the relationship between preparation methods and performance of CBFs is presented. The paper also provides an overview of CBFs' applications and future development.
ADVANCED FIBER MATERIALS
(2022)
Article
Polymer Science
Jiang Du, Chuanzhi Pu, Xianyu Sun, Qi Wang, Hongqing Niu, Dezhen Wu
Summary: In this study, high-performance polyimide (PI) fibers with excellent interfacial adhesion and mechanical properties were successfully developed by introducing 4,4'-diamino-(1,1'-biphenyl)-3,3'-diol (HAB) diamine into the molecular chains. The fibers exhibited an interfacial shear strength (IFSS) value of 46.33 MPa, tensile strength of 2.62 GPa, and modulus of 100.15 GPa. The introduction of HAB moiety contributed to the reduction of microvoid radii in the fibers, leading to significant enhancement in their mechanical properties. The surface activity of the synthetic fibers was confirmed by X-ray photoelectron spectroscopy and static contact angle measurements, and the enhanced interfacial adhesion in PI fiber/epoxy resin composites was demonstrated. This study provides an effective strategy to address the long-standing challenges in the PI fiber-reinforced polymer matrix composites industry.
Article
Polymer Science
Feng Bao, Ran Zhang, Zhixin Dong, Fuling Qi, Yanchun Cai, Xuemin Dai, Xiangling Ji, Xuepeng Qiu
Summary: The study investigated the effects of molecular coplanar structure on the performance of polyimide copolymer fibers, finding that higher coplanarity and molecular packing led to increased crystallinity and orientation, resulting in enhanced mechanical properties such as fracture strength and initial modulus.
Article
Polymer Science
Hoan Ngoc Doan, Shotaro Tagami, Phu Phong Vo, Masaki Negoro, Wataru Sakai, Naoto Tsutsumi, Kazuyoshi Kanamori, Kenji Kinashi
Summary: In this study, cross-linked porous polyimide fibers were prepared using centrifugal spinning, and the influence of different parameters was evaluated. The obtained fibers exhibited low thermal conductivity, high thermal stability, and flexibility.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Polymer Science
Yangfeng Gao, Chao Dong, Fan Zhang, Xuefei Leng, Yang Li
Summary: In this study, a novel mesoporous polyimide aerogel containing Troger's base was successfully synthesized, exhibiting outstanding thermal stability and high CO2 adsorptive capacity. The mild and convenient preparation method makes it suitable for CO2 capture in industrial applications.
HIGH PERFORMANCE POLYMERS
(2023)
Article
Computer Science, Interdisciplinary Applications
G. R. Berdiyorov, H. Hamoudi
Summary: The quantum transport through molecular junctions containing pyrimidine units characterized by a permanent dipole moment was studied using density functional theory and Green's functional formalism. The presence of pyrimidine rings enhanced the current through the junctions for both polarities of the applied voltage, showing clear current rectification due to the polar nature of the molecules. The effect of the dihedral angle between phenyl and pyrimidine rings on current rectification was also explored, with results explained in terms of charge localization in the system discovered through transmission eigenvalues analysis. These findings can aid in understanding the role of polar self-assembled monolayers in interface engineering.
JOURNAL OF COMPUTATIONAL SCIENCE
(2021)
Article
Polymer Science
Karolina Cichon, Irena I. Bak-Sypien, Malgorzata Basko, Bartlomiej Kost
Summary: New functionalized lactide copolymers with controllable number of reactive groups were synthesized. The copolymers had chemically modifiable sites in the backbone and the degradability varied with the nature of acetal unit. Cyclic acetals with different functionalities were synthesized and used for cationic copolymerization with lactide to obtain copolyesters with variable acetal unit contents. The copolymers' structure and molar masses were investigated, and the post-modification ability of the functionalized copolymers was proven.
Article
Pharmacology & Pharmacy
Manal E. Alkahtani, Alhassan H. Aodah, Omar A. Abu Asab, Abdul W. Basit, Mine Orlu, Essam A. Tawfik
Summary: The study demonstrated that a fixed-dose combination of quetiapine and escitalopram in a fast-dissolving film formulation could accelerate drug release and enhance oral absorption, providing a potential treatment option for treatment-resistant depression.
Article
Materials Science, Ceramics
Buyue Zhao, Haiming Huang, Qunjiao Chen
Summary: In this study, Y2Si2O7 precursor fibers were prepared by electrospinning and characterized for their microstructure, element distribution, and properties after calcination. The results showed that the size of grains in the fibers increased with increasing calcination temperature while maintaining the intact fibrous structure.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Review
Food Science & Technology
Da Chen, Owen Griffith Jones, Osvaldo H. Campanella
Summary: Structuring plant proteins into fibrous architectures enhances their physicochemical properties and expands their applications in the food industry. Fibers can be fabricated from plant proteins through self-assembly, spinning, and high-temperature shear methods. High-temperature shear-induced fibers in particular can create desired texture in meat analogues.
CRITICAL REVIEWS IN FOOD SCIENCE AND NUTRITION
(2023)
Article
Materials Science, Multidisciplinary
Rong Wang, Lianbi Li, Lei Li, Changjun Zhu, Zebin Li, Lin Cheng, Song Feng, Guoqing Zhang, Yuan Zang, Jichao Hu, Yongkang Xu
Summary: A flexible near-infrared photodetector was fabricated by growing a Ge/Gr heterojunction using pulsed laser deposition and transferring it onto a flexible polyimide substrate. The transferred heterojunction showed no significant changes in Raman spectra, indicating successful transfer. The Ge/Gr heterojunction exhibited enhanced absorption characteristics, high rectification ratio, and stable photoresponse to NIR light.
Article
Engineering, Electrical & Electronic
Yuanming Chen, Jiaqi Li, Yan Hong, Wei He, Yao Tang, Guoyun Zhou, Zhenlin Xu, Yaozong He, Zhiguo Nie, Jiaqiang Zhang, Shouxu Wang
Summary: In this work, a flexible pressure sensor was assembled using a nano-ZnO/CNTs/PDMS active layer, which showed a sensitivity of 0.18 kPa(-1) and a response time of 45.5 ms at 0 to 10 kPa. The combination of CNTs and nano-ZnO enhanced the pressure sensing properties of the PDMS substrate. The assembled sensor demonstrated good stability after 6000 cycles and could be used for monitoring the movement of various body parts.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Engineering, Manufacturing
Baolu Shi, Bin Ma, Chenqi Wang, Han He, Lijie Qu, Baosheng Xu, Yanfei Chen
Summary: Nano-aerogels, particularly Polyimide (PI) nano-aerogels, are increasingly being studied for their superior properties and potential applications in harsh temperature environments such as deep space exploration. Their ultralow density, ultrahigh porosity, and high thermal stability make them promising materials for future technological advancements.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)