Article
Chemistry, Inorganic & Nuclear
Eman O. Taha, Haifa A. Alyousef, A. M. Dorgham, O. M. Hemeda, Hesham M. H. Zakaly, P. Noga, M. M. Abdelhamied, M. M. Atta
Summary: In this research, the PVDF-PZT composite was successfully manufactured using a solution-casting approach. The effects of electron beam dosage and CNT loading on the structural, dielectric, and dynamic-mechanical characteristics of PVDF-PZT were investigated. The results showed that incorporating CNT into PVDF-PZT increased the storage modulus, while electron beam irradiation decreased the storage modulus and crosslinking density. Additionally, both CNT content and electron beam dosage enhanced the dielectric parameters of PVDF-PZT.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Kamaludin Abdulvakhidov, Ivan Dmitrenko, Alexander Soldatov, Zhengyou Li, Marina Sirota
Summary: This work investigates the influence of structural defects generated by mechanical activation on the crystal structure and physical properties of PbZr0.7Ti0.3O3 solid solution. It is found that by choosing the mechanical activation pressure, the dielectric permittivity, phase transition degree, and bandgap can be controlled.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Polymer Science
Mohamed A. Ismail, G. M. Nasr
Summary: The effect of adding nanoparticulate (organo-modified montmorillonite-MMT) into polyamide 66 (PA66) on the glass transition temperature (T-g), storage modulus (G '), and electrical properties was investigated using differential scanning calorimetry (DSC), dynamical mechanical analysis (DMA), and dielectric relaxation spectroscopy (DRS). The incorporation of clay nanoparticles led to a decrease in the glass transition temperature. DMA was found to be a valuable and sensitive technique for measuring T-g. The storage modulus increased with filler content, but decreased with temperature. The dielectric constant and ac electrical conductivity increased with filler content and temperature.
Article
Materials Science, Textiles
P. Venkateshwar Reddy, R. V. Saikumar Reddy, B. Veerabhadra Reddy, D. Mohana Krishnudu, P. Rajendra Prasad, P. Srinivasa Rao
Summary: The utilization of plant-based fiber-reinforced composites is increasing, with alkali treatment improving bonding and crystallinity. Testing showed improved thermal stability and extended applications in automotive, packaging, and construction fields.
JOURNAL OF NATURAL FIBERS
(2022)
Review
Materials Science, Textiles
M. R. M. Asyraf, K. Z. Hazrati, Desmond Daniel Chin Vui Sheng, M. Rafidah, W. Ashraf, Emrah Madenci, Yasin Onuralp Ozkilic, Ceyhun Aksoylu, N. M. Nurazzi
Summary: Lignocellulosic fibre from forest biomass has advantages in product development, and sugar palm fibre (SPF) has shown promise as a reinforcement in high-strength biocomposites. However, SPF exhibits high water absorption properties, which affects its performance when binding with thermoplastic matrix.
FIBERS AND POLYMERS
(2023)
Article
Materials Science, Ceramics
Yuan Zhou, Zhixuan Tian, Yanzhi Cai, Chengye Liu, Yifan Li, Xiang Li
Summary: Tm2O3 was introduced into the KNN structure for the first time in this study, and (1-x)K0.5Na0.5Nb0.7Ta0.3O3xTm(2)O(3) (x=0.1-1.0%) powders were synthesized through a solvothermal method. The corresponding ceramics were prepared via atmospheric sintering. The introduction of Tm3+ promoted the refinement of KNN grain and resulted in significant increase in room-temperature dielectric permittivity and relaxation dispersion.
CERAMICS INTERNATIONAL
(2023)
Article
Polymer Science
Albert Serra-Aguila, Josep Maria Puigoriol-Forcada, Guillermo Reyes, Joaquin Menacho
Summary: A method was developed in this study to predict the tensile moduli of thermoplastic materials under different conditions, saving research time and reducing the number of tests. The method was validated and showed good results, being applicable to thermorheologically simple materials.
Article
Materials Science, Multidisciplinary
Xue Dong, Bom Lee, Asghar Ghulam, Jun Akedo, Hak Ki Yu, Jae-Young Choi, Jae-Hyuk Park
Summary: A PZT/Au composite film was prepared using aerosol deposition (AD) to modulate the dielectric properties of PZT. The dispersion of Au nanoparticles in the film significantly affected the dielectric constant and loss, with an increase of more than three times and low loss, respectively, when the wt % of Au nanoparticles increased. AD is expected to be a widely used method for the future development of dielectric complexes due to its simplicity and effectiveness in fabricating thin composite films.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Ceramics
Feifei Guo, Shaokun Zhang, Wei Long, Pinyang Fang, Xiaojuan Li, Zengzhe Xi
Summary: In this study, a two-step solid-state reaction method was used to prepare PNN-PZT/xSnO(2) ceramics, and the effects of SnO2 on their crystalline structure, electromechanical properties, and temperature stability were investigated. The results showed that the introduction of SnO2 improved the performance of PNN-PZT ceramics and provided a promising piezoelectric material for applications such as medical ultrasonic transducers.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Elena Ruxandra Radu, Denis Mihaela Panaitescu, Laura Andrei, Florin Ciuprina, Cristian Andi Nicolae, Augusta Raluca Gabor, Roxana Trusca
Summary: This study developed a scalable and environmentally friendly method to obtain polysiloxane/nanosilica nanocomposites with a large content of nanofiller. These materials exhibit good flexibility, increased strength, and improved dielectric properties, making them suitable for use as dielectric substrates in wearable electronic devices.
Article
Materials Science, Multidisciplinary
Yan Yu, Bin Huang, Yan Zhao, Yunfeng Zhao, Lina Dai, Zhijie Zhang, Hua-Feng Fei
Summary: Polysiloxane-based dielectric elastomers have great potential as electroactive soft materials, but their low permittivity has hindered practical applications. This study demonstrates that introducing cyanosilicone oil into the elastomer matrix can significantly increase the permittivity and enhance the dielectric relaxation processes. The resulting elastomer composites exhibit lower Young's modulus and dielectric loss.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Zhi Wang, Bingyi Liu, Shouben Huang, Feng Wang, Le Zhou, Pingli Mao, Zheng Liu
Summary: The study systematically investigates the dynamic mechanical properties and microstructure of Mg-5.9Zn-0.9Cu-0.4Zr (ZC61) alloy at different strain rates. It is found that the alloy exhibits positive strain rate enhancement effects, with variations in grain sizes and deformation mechanisms observed at different rates.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Polymer Science
Thuane Teixeira da Silva, Pedro Henrique Poubel Mendonca da Silveira, Andre Ben-Hur da Silva Figueiredo, Sergio Neves Monteiro, Matheus Pereira Ribeiro, Lucas de Mendonca Neuba, Noan Tonini Simonassi, Fabio da Costa Garcia Filho, Lucio Fabio Cassiano Nascimento
Summary: This study evaluated the performance of epoxy matrix composites reinforced with kenaf fibers, showing increased strength and stiffness, making them suitable for automotive parts and ballistic armor components.
Article
Polymer Science
F. Mohamed, Talaat A. Hameed, A. M. Abdelghany, G. Turky
Summary: Films of polyethylene oxide filled with silicon dioxide were synthesized using the casting method. The addition of SiO2 to PEO increased amorphousity and disrupted the crystalline phase. The dielectric relaxation spectra of PEO were affected by the presence of SiO2, leading to changes in molecular relaxation processes and a decrease in the motion of PEO segments. The terahertz waves passing through PEO/SiO2 samples were also influenced by the presence of SiO2, resulting in weakened, broadened, and red-shifted resonant peaks.
Article
Materials Science, Composites
Iram Aziz, Hatice Duran, Murtaza Saleem, Basit Yameen, Salman Noshear Arshad
Summary: Polymer nanocomposites containing pristine and amine-functionalized electrospun carbon nanofibers were fabricated, with improved interface properties leading to enhanced mechanical and thermal performance. The potential of electrospun CNFs as structural and functional reinforcement was highlighted through discussions on thermal stability, dielectric properties, and AC/DC conductivity.
POLYMER COMPOSITES
(2021)
