Article
Materials Science, Multidisciplinary
K. A. Darwish, O. M. Hemeda, M. I. Abdel Ati, Anwer S. Abd El-Hameed, Di Zhou, Moustafa A. Darwish, M. M. Salem
Summary: This study evaluates the electromagnetic properties of hybrid materials made from polypyrrole (PPy) and barium hexaferrite (HF) for potential use in electromagnetic interference (EMI) shielding applications. The addition of 25% HF content produces the most stable and efficient composite for absorbing EM waves in the X-band. This research demonstrates the potential of conductive polymer composites for EMI shielding applications and provides insights into designing more efficient EMI shielding materials through optimizing the composition and characterizing the EM properties of the PPy/HF composite.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Physical
Wen Zeng, Weiqing Huang, Bing Guo, Yang Sun, Hangyan Shen
Summary: To improve the lubrication performance of polystyrene microspheres in drilling fluids, composite microspheres with elastic graphite, montmorillonite, and polytetrafluoroethylene were prepared. The friction coefficient of the composite microspheres was significantly reduced compared to pure water, with PTFE/PS showing the largest reduction at 62%. The wear tracks of the composite microspheres were narrower and smoother than those of pure water.
Article
Green & Sustainable Science & Technology
Haipeng Sun, Zhen Liu, Xingqiang Liu, Changlin Yu, Longfu Wei
Summary: In this study, Ppy/Bi2MoO6 microsphere photocatalysts were successfully prepared by adjusting the content of conducting polymer polypyrrole (Ppy). Characterization and electrochemical tests revealed that the introduction of Ppy enhanced the crystallinity and specific surface area of Bi2MoO6, leading to improved migration rate and utilization efficiency of photogenerated carriers. The Ppy/Bi2MoO6 microsphere photocatalyst exhibited excellent photocatalytic performance in the degradation of high concentration of Rhodamine B (RhB) and efficient removal of mixed dyes.
MATERIALS TODAY SUSTAINABILITY
(2022)
Article
Chemistry, Physical
Qiaojing Wang, Yibo Deng, Jianxia Chen, Liying Lu, Yingli Ma, Likun Zang
Summary: Resistive random-access memory (ReRAM) is a promising field, but it faces challenges of poor thermal stability and low ON/OFF ratio. By combining polymer materials with metal nanoparticles, the resistive switching properties can be effectively improved. This study developed a modified electrochemical strategy to synthesize dense polypyrrole-Ag nanoparticles (PPy-Ag NPs) composite films as the active layer in the memory device. The introduction of Ag NPs resulted in a bipolar switching phenomenon and the memory properties were influenced by the doping concentration of Ag NPs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Harikrishnan Vijayan, Amalie Povlsen, Jack Thomas-Hunt, Mathias Ibsen Morch, Mogens Christensen
Summary: This research presents the synthesis of sintered cold compacted hexaferrite magnets with good magnetic properties and crystallite alignment using non-magnetic precursors. Platelet shaped six-line ferrihydrite and needle shaped goethite nanoparticles were employed as non-ferromagnetic interacting precursors. The use of hydrothermal synthesis and conventional compaction technique allowed for the production of aligned bulk magnets without the need for an external magnetic field.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Textiles
Peijun Huang, Yan Liu, Zhuoming Chen, Yuansheng Zheng, Khammatova Venera Vasilovna, Gainutdinov Ruslan Faritovich, Binjie Xin
Summary: Polypyrrole (PPy) is a conductive polymer with high electrical conductivity, thermal and environmental stability, and various other advantages. By immobilizing PPy on a polyurethane (PU) film using dopamine (PDA) as a platform, a smart wearable element with good electrical conductivity and flexibility is obtained. It has fast electrothermal response, light weight, and uniform heat distribution, making it superior to other electrical heating materials.
FIBERS AND POLYMERS
(2023)
Article
Materials Science, Multidisciplinary
Shu-ji Wang, Di Wang, Peng Chen, Shi Yan, Qing-jie Jiao, Xue-yong Guo
Summary: Electrostatic spray drying method was used to prepare Al@TKX-50@NC composite microspheres, which showed excellent mechanical properties. The structure and composition of the composite were characterized, and its thermal decomposition kinetics and thermodynamics were calculated and analyzed. The ignition and combustion performance of the composite were also tested. The results demonstrated that the electrostatic spray method is highly effective in improving the energy release of composite energetic materials.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Engineering, Manufacturing
Yuhong Cui, Fei Wu, Jiqi Wang, Yabin Wang, Tariq Shah, Pei Liu, Qiuyu Zhang, Baoliang Zhang
Summary: This study utilized ultrasonic spray technology to assemble MXene nanosheets and carbon nanotubes into three-dimensional porous microspheres, which demonstrated excellent microwave absorbing properties after vacuum carbonization. With optimized mass ratio and filler content, the C-MCM achieved a minimum reflection loss of -45 dB at 10 GHz with a thickness of 2.7 mm.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Engineering, Electrical & Electronic
Max Ho, Srinivas P. M. Nagaraja, Rustu Umut Tok, Aysan Rangchian, Pirouz Kavehpour, Yuanxun Ethan Wang, Rob Candler
Summary: Millimeter-wave components often use magnetic fields to provide unidirectional signal transmission, but face difficulties in miniaturization. Hexaferrite materials are selected for their strong magnetocrystalline anisotropy (MCA) and low conductance, but integrating them with semiconductor substrates is challenging. Additive manufacturing using a composite of strontium hexaferrite particles and photoresist has been developed to overcome this challenge. The 3-D printed composite has demonstrated magnetic anisotropy, and the self-biasing field has been experimentally characterized.
IEEE TRANSACTIONS ON MAGNETICS
(2023)
Article
Chemistry, Multidisciplinary
Lingpu Jia, Juan Hao, Qingliang Feng, Huiming Li, Kunping Liu
Summary: A CNTs-PPS/PVA composite material has been prepared by using PVA to disperse PPS particles and CNTs at room temperature. The as-prepared composite possesses outstanding versatility and can be used for 3D printing microcircuits. This research provides a simple and meaningful method to construct composites for solvent resistant polymers.
NANOSCALE ADVANCES
(2023)
Article
Engineering, Chemical
Ya-Ge Zhang, Ling-Zhi Huang, Qi Yuan, Ming-Guo Ma
Summary: This study fabricates flexible, ultrathin, and multifunctional polypyrrole/cellulose nanofiber composite films using a one-step soak and polymerization method. The composite films exhibit excellent flexibility, mechanical strength, and toughness due to their dense sandwich structure and strong interfacial interaction. Furthermore, the composite film electrodes with quaternary amine functionalized cellulose nanofibers show the highest specific mass capacitance and specific areal capacitance compared to other types of electrodes. Additionally, the composite films with sandwich structure demonstrate excellent photothermal conversion properties. These findings provide a feasible and versatile method for preparing multifunctional composite films with potential applications in various energy storage fields.
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
(2023)
Article
Food Science & Technology
Qing-yun Bu, Yue Chen, Yue Ding, Kang-xi Zhang, Ya-Chun Li, Xiao-yan You, Guo-ping Zhao
Summary: As a potential regulator of human health, tea polyphenols (TP) can alleviate intestinal dysbiosis and restore the balance of host-intestinal flora. However, their limited bioavailability due to potential destruction during digestion hinders their effectiveness. In this study, TP-loaded composite microspheres were prepared using sodium alginate (SA) and crosslinked corn starch (CP) to facilitate controlled release of TP in the gastrointestinal tract. The prepared microspheres showed improved TP loading capacity and pH-responsive properties, effectively regulating the homeostatic balance of the intestinal microbiota.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Textiles
Xiangyu Xie, Binjie Xin, Zhuoming Chen, Yingqi Xu
Summary: The study prepared conductive polyester fabric by in-situ polymerization and found the optimal molar ratio of aniline and pyrrole to achieve the best conductivity and electrochemical properties. The electrode fabric showed high specific capacitance and energy density for supercapacitor applications, with excellent flexibility and capacitance retention after 1000 cycles.
JOURNAL OF THE TEXTILE INSTITUTE
(2022)
Article
Materials Science, Multidisciplinary
K. Subrahmanya Sarma, Ch. Rambabu, G. Vishnu Priya, M. K. Raju, D. Parajuli, Batoo Khalid Mujasam, Verma Ritesh, Kumar Rajesh, N. Murali, P. V. Lakshminarayana
Summary: M-type Al-Cr-substituted strontium hexaferrite powders were successfully synthesized and their structural, morphological, and magnetic properties were studied. The results showed that the saturation magnetization decreased and the coercivity initially decreased and then increased with increase in dopant concentration.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Agricultural Engineering
Mingyan Wang, Yun-chi Zhu, Hengfu Huan, Yue Sun, Jian Chen, Guanglong Yao
Summary: This study utilized oxidized sesbania gum (OSG) blended with other materials to create an antibacterial food packaging material. The addition of nano-zinc oxide had an impact on the mechanical and barrier properties of the composite film, with an optimal amount increasing tensile strength and thermal stability, but excessive addition diminishing performance.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
