Article
Materials Science, Ceramics
Jingyu Li, Qian Wang, Ke Gai, Bangjun Lu, Yuhuan Wu, Kun Zheng, Bo Guan, Weijian Han, Li Ye, Fenghua Chen, Tong Zhao
Summary: Zirconia-alumina multiphase ceramic fibers with 80 wt% and 10 wt% zirconia content were prepared via melt-spinning and calcination methods. The fibers exhibited high tensile strength and thermal stability.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Jian Shen, Zicheng Tang, Rogers Tusiime, Bin He, Yatian Chen, Jidong Hu, Haikun Chen, Hui Zhang, Yong Liu
Summary: In this study, SiBNC-Hf ceramic precursors were synthesized using a one-pot method, and their structures and properties were characterized using various techniques. The successful incorporation of Hf into the precursors was confirmed, and precursors synthesized from Hf dichloride showed higher ceramic yield and better solubility. Moreover, there was a positive correlation between the Hf content in the precursors and the ceramic yield, although it led to a decrease in solubility and processability. Upon pyrolysis at 1000 degrees C, the SiBNC-Hf ceramics transformed into Si-B-N skeleton, HfN, and free carbon.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Chao Wang, Zhuo Xu, Fei Li
Summary: In this study, a modified polysulfone spinning method was used to prepare 0.02Smdoped 0.47Pb(Mg1/3Nb2/3)O3-0.18PbZrO3-0.35PbTiO3 (abbreviated as Sm-PMN-PZT) ceramic fibers. These fibers showed a small grain size and diameter, as well as high piezoelectric coefficient, relative dielectric permittivity, and coupling factor. The experimental results indicated that these fibers could be used in advanced electromechanical devices where high-performance 1D piezoelectric materials are needed.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Chemical
Shenglan Liu, Yishu Yan, Yinxiang Xu, Chao Yang, Yiqun Fan, Junbo Xu
Summary: The stiffness of phenolic resins is affected by methylene bridges and branched phenolic rings. Introducing naphthols does not significantly improve stiffness due to the counterbalance between nonbonded energies and the decrease in methylene bridges. In the case of cyanate ester modified phenolic resins (CEPF), chain-to-chain bridges of triazine rings increase the Young's modulus and contribute more to stiffness compared to rigid naphthols. The trend from plastic to cured state can be observed in the mean squared displacement and Young's modulus. These findings support the molecular design of phenolic resins to optimize stiffness.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Materials Science, Ceramics
Zhang Lusha, Tang Zicheng, Rogers Tusiime, Wang Shaofei, Feng Ningning, Zhang Yifan, Zhang Hui, Liu Yong
Summary: SiBNC ceramic aerogels prepared in this work exhibit lightweight, high porosity, and wide pore size distribution, with good absorption properties for electromagnetic waves. They also show excellent temperature resistance and potential applications in high-temperature absorption fields.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Jonas Kost, Alexander Bleiziffer, Dennis Rusitov, Juergen Ruehe
Summary: This study focuses on the thermal activation of surface-attached polymer networks under mild conditions, using a novel cross-linker based on a diazo phenyl ester group. The system, which enables the rapid complete cross-linking of films with simultaneous surface attachment to organic materials via CHic, only requires activation below 100 degrees C and has a long shelf life at room temperature. It has potential applications in coatings and complex geometries.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
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
Materials Science, Multidisciplinary
Yujia Liu, Yu Long, Qingyui Wang, Chuncheng Hao, Qingquan Lei, Xiangjin Guo
Summary: The effect of different mass fractions of cross-linking agent on the cross-linking degree and electrical properties of cross-linked polyethylene was studied. The experimental results showed that when the mass fraction of DCP was 2.5 wt% and BIPB was 1.5 wt%, the cross-linking degree and breakdown field strength were the highest. Compared to BIPB, DCP as a cross-linking agent led to lower breakdown strength but higher conductivity due to the presence of more impurities and increased space charge accumulation.
MATERIALS RESEARCH EXPRESS
(2023)
Article
Chemistry, Applied
Dominik Ruhr, Michael John, Annette Reiche
Summary: Experimental study showed that approximately 50% of BDDE molecules effectively cross-link, and there is a direct correlation between the degree of cross-linking and the decomposition temperature of the cellulose membranes.
CARBOHYDRATE POLYMERS
(2021)
Article
Biochemistry & Molecular Biology
Yudan Yi, Yi Zhang, Bradley Mansel, Ya-Nan Wang, Sujay Prabakar, Bi Shi
Summary: In this study, dialdehyde carboxymethyl cellulose (DCMC) crosslinkers with similar sizes but different aldehyde group contents were prepared. By regulating the structure of the crosslinkers, the pore properties of the collagen matrix were controlled, resulting in enhanced potential for biomedical applications.
Article
Psychology, Multidisciplinary
Ana Belen Subiron-Valera, Beatriz Rodriguez-Roca, Estela Calatayud, Isabel Gomez-Soria, Elena Andrade-Gomez, Yolanda Marcen-Roman
Summary: This study examined the relationship between mental health (anxiety and depression) and sedentary behavior among students majoring in Health at the University of Zaragoza. The results showed that female students with symptoms of anxiety spent more time engaged in sedentary behaviors, especially mentally-passive activities. Female students at risk of depression also spent more time engaged in mentally-passive sedentary behaviors compared to male students. Overall, the risk of anxiety and depression was associated with the amount of time spent in sedentary behaviors, particularly mentally passive behaviors.
FRONTIERS IN PSYCHOLOGY
(2023)
Article
Environmental Sciences
Sina Gholami, Alireza Rezvani, Vahid Vatanpour, Seyyed Hossein Khoshravesh, Joan Llorens, Elisabeth Engel, Oscar Castano, Jose Luis Cortina
Summary: Researchers successfully improved the chlorine resistance and performance of reverse osmosis (RO) membranes by adding m-phenylenediamine (MPD) chemical structure in thin film nanocomposite (TFN) membranes. The modified TFN-RO membranes demonstrated higher ion selectivity, water flux, salt rejection stability, and antifouling performance. The membranes were able to withstand rigorous chlorine exposure of 500 ppm.h with only 5 L/m2.h flux loss.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Materials Science, Composites
Ilaria Papa, Maria Rosaria Ricciardi, Andrea Calzolari, Antonio Langella, Jacopo Tirillo, Fabrizio Sarasini, Valentina Lopresto
Summary: Hybrid composite samples with different carbon and glass fiber layers arrangement were produced by resin transfer molding to investigate the effects of low temperature on their flexural and impact behavior, revealing that stacking sequence governs both. Flexural strength and modulus values improved at low temperature, while easier damage propagation and less residual strength were detected in dynamic loading.
POLYMER COMPOSITES
(2021)
Review
Polymer Science
Meng Xia, Shuyu Ji, Yijun Fu, Jiamu Dai, Junxiong Zhang, Xiaomin Ma, Rong Liu
Summary: Alumina ceramic nanofibers, a significant inorganic material, have garnered increasing attention due to their exceptional thermal stability, high melting point, low thermal conductivity, and good chemical stability. This paper briefly introduces the preparation conditions for alumina spinning gel and describes various methods for preparing the alumina ceramic nanofibers, as well as their wide range of applications in fields such as thermal insulation, high-temperature filtration, catalysis, energy storage, water restoration, sound absorption, and bioengineering. The extensive application prospects of alumina ceramic nanofibers highlight their potential as advanced functional materials with diverse applications.
Review
Chemistry, Multidisciplinary
Wei-Hua Han, Qing-Yu Wang, Yuan-Yi Kang, Li-Rui Shi, Yu Long, Xin Zhou, Chun-Cheng Hao
Summary: This review comprehensively discusses the cross-linking electrospinning system for the first time, including cross-linking strategies, cross-linking mechanisms, and applications of cross-linked electrospun nanofibers. The significance of cross-linking electrospinning and the challenges in constructing this system are also highlighted.
