Article
Materials Science, Composites
Omid Aghababaei Tafreshi, Zia Saadatnia, Shahriar Ghaffari-Mosanenzadeh, Tianhao Chen, Sophie Kiddell, Chul B. Park, Hani E. Naguib
Summary: This study presents the fabrication of novel polyimide composite aerogel films with tunable dielectric properties by incorporating graphene nanoplatelet fillers. The addition of graphene improved the nanostructure of aerogels, resulting in improved homogeneity and uniformity of the composite gel films. The inclusion of graphene nanoplatelets proved to be an effective strategy for improving the mechanical properties, machinability, and thermal stability of aerogels.
COMPOSITES COMMUNICATIONS
(2022)
Article
Polymer Science
Yurong Zhang, Haidan Lin, Kai Dong, Shasha Tang, Chengji Zhao
Summary: A series of epoxy resins containing trifluoromethyl groups were synthesized and cured with diaminodiphenylmethane (DDM) and aminophenyl sulfone (DDS). The epoxy resins exhibited excellent thermal stability, with high glass transition temperatures and weight loss temperatures. DDS-cured epoxy resins had higher thermal stability, while DDM-cured epoxy resins showed better mechanical, dielectric, and hydrophobic properties. The results suggest that incorporating trifluoromethyl pendant groups into epoxy resins can improve their dielectric and hydrophobic performance.
Article
Chemistry, Multidisciplinary
Ermioni Papadopoulou, Julija Zavadlav, Rudolf Podgornik, Matej Praprotnik, Petros Koumoutsakos
Summary: Water's tunable polarity can be utilized in various emerging technologies such as catalysis and gas storage. Studies have shown that water can become effectively nonpolar under nanoconfinement. By altering the wettability of the confining material, the dielectric constant of water can be modified, demonstrating the feasibility of tunable water polarity with great potential for scientific and technological impact.
Article
Engineering, Manufacturing
Xianwu Cao, Wanjing Zhao, Xianjing Gong, Dongli Zhang, Qijun Su, Junwei Zha, Xinmao Yin, Wei Wu, Robert K. Y. Li
Summary: In this study, core-shell structured polydopamine functionalized silicon carbide whiskers were successfully synthesized to improve the dielectric properties of the composites. The presence of PDA effectively suppressed the dielectric loss, and the thicker PDA layer contributed to enhancing dielectric breakdown strength and reducing AC conductivity. This simple coated PDA shell strategy could be extended to develop high performance dielectric polymer composites with other inorganic fillers.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Materials Science, Ceramics
Rui Peng, Yongcheng Lu, Yuanxun Li, Hua Su, Liang Shi, Guoliang Yu, Yuanming Lai, Qiang Zhao, Xiaolei Shi, Huaiwu Zhang
Summary: Manganese substitution significantly affects the properties of MBO, improving dielectric performance, densifying microstructure, reducing crystallite size, and altering band structure properties.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Engineering, Environmental
Jingjing Meng, Pengfei Chen, Rui Yang, Linli Dai, Cheng Yao, Zheng Fang, Kai Guo
Summary: Novel polymers based on naturally available honokiol were fabricated to produce renewable and functional epoxy resins, showing excellent thermal stability, conductivity, high specific heat, dielectric properties, and low flammability. The high-performing networks have great potential applications in the electronics and microelectronics industry.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Applied
Shilong Dong, Xueying Hu, Qiaolong Yuan, Farong Huang
Summary: A series of telechelic silicon-containing hybrid polymers with reactive ethynylphenyl terminals were synthesized by the Grignard reagent method. The polymers were well characterized in terms of their structure, processability, curing behavior, thermal stability, dielectric properties, and mechanical properties. The results showed that the polymers had a wide processing window and stable viscosity, excellent thermooxidative stabilities, and good dielectric properties. The incorporation of Si-H groups markedly increased the thermal stability of the cured polymers.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Engineering, Electrical & Electronic
Hui Zheng, Chenyi Wang, Zhengwang Tao, Cairong Jiang, Xiaoyan Zhao, Jian Li, Qiang Ren
Summary: Soluble polyimides PI 3a-3c were synthesized in this study, exhibiting excellent thermal stability, low dielectric constant, and water absorption. These polyimides also showed high optical transparency.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Geosciences, Multidisciplinary
Justino Martinez, Carolina Gabarro, Antonio Turiel, Veronica Gonzalez-Gambau, Marta Umbert, Nina Hoareau, Cristina Gonzalez-Haro, Estrella Olmedo, Manuel Arias, Rafael Catany, Laurent Bertino, Roshin P. Raj, Jiping Xie, Roberto Sabia, Diego Fernandez
Summary: Measuring salinity from space is challenging due to its low sensitivity to sea surface salinity. The European Space Agency (ESA) launched the Arctic+Salinity project in 2019 to produce an enhanced Arctic sea surface salinity product with improved quality and resolution. The product utilizes improved methodologies to achieve better spatial resolution and benefits the monitoring of mesoscale structures and river discharge.
EARTH SYSTEM SCIENCE DATA
(2022)
Article
Polymer Science
Hubo Wei, Xian Li, Xu Ye, Chao Guo, Juan Peng, Jiaying Liu, Xinyu Hu, Junxiao Yang, Jinxiang Chen
Summary: Modified silicone resins have gained attention in the field of microelectronics due to their excellent physical properties and molecular modifiability. In this study, functional silicone resin with different BCB contents was prepared and showed low dielectric constant and thermal stability. By increasing the BCB structural units, significant improvements in performance were observed, and the obtained silicone resins do not require melting and dissolution during processing. The mechanical properties of the resins can also be controlled by adjusting the BCB content, making them potentially useful in the field of electronic packaging materials.
Review
Materials Science, Ceramics
Dongyang Zhang, Linling Li, Yong Wang, Chen Zhang, Chao Teng
Summary: This article briefly summarizes the recent achievements in reducing the dielectric properties of polyimide films through various methods or strategies, and also summarizes the mechanical properties, thermal stability, and optical properties. Achieving the synergy of low dielectric properties, high thermal stability, and superior mechanical properties is the research direction and priority for future development of polyimide films.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Characterization & Testing
Eyob Wondu, Zelalem Chernet Lule, Jooheon Kim
Summary: This study aims to fabricate a composite material with a high dielectric constant and suitable thermal conductivity, consisting of thermoplastic polyurethane (TPU) and carbon nanotube (CNT)-covered strontium titanate (SrTiO3). The results showed that the dielectric constants of the composites with 40% CNT-covered SrTiO3 were three times higher than the pure TPU matrix. The thermal conductivity was significantly improved by 9 times compared with the pure TPU, while the tensile strength and thermal stability were minimally affected.
Article
Materials Science, Composites
Liangang Zheng, Kun Zhang, Wuzhou Li, Fujun Xu
Summary: This study presents a 3D woven spacer Kevlar/polyimide composite (3DKPC) with excellent mechanical and dielectric properties, including low density, high compressive strength, and low dielectric constant and loss tangent. The composite demonstrates stable mechanical and dielectric performance at different temperatures.
POLYMER COMPOSITES
(2022)
Article
Engineering, Electrical & Electronic
Zie Yuan, Xiujuan Lin, Xuan Fei, Chao Wang, Wenlong Li, Feng Yu
Summary: This study presents a method to enhance the thermal stability of polymer dielectrics by introducing SrTiO3 particles into PEI films. The composites loaded with 3% SrTiO3 particles achieve high discharge energy density and efficiency at elevated temperatures, exhibiting excellent fatigue resistance.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Engineering, Environmental
Zuzanna Kantor, Tingting Wu, Zhihui Zeng, Sabyasachi Gaan, Sandro Lehner, Milijana Jovic, Anne Bonnin, Zhengyuan Pan, Zahra Mazrouei-Sebdani, Dorina M. Opris, Matthias M. Koebel, Wim J. Malfait, Shanyu Zhao
Summary: Polymer aerogels are a promising alternative to brittle silica aerogels, but they lack high-temperature stability. Researchers have developed a new type of aerogel composite with unique structure and excellent properties, which could be used in applications requiring high mechanical strength, low thermal conductivity, and low dielectric constant.
CHEMICAL ENGINEERING JOURNAL
(2022)
