Article
Materials Science, Ceramics
Lin Zhao, Xueying Wang, Seahoon Lee, Emanuel Ionescu, Ralf Riedel
Summary: Nano size ZrC powder was prepared using liquid polymeric precursor method, controlling the carbon content and viscosity. ZrC powders were fabricated by pyrolysis and carbothermal reduction in argon and vacuum, with analysis of microstructure and pyrolysis mechanism. The synthesized X-ray pure ZrC powders had an average grain size less than 30 nm.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Rongqian Yao, Yinong Zheng, Chao Jin, Wenyan Huang, Yuchen Han, Ke Li, Siqi Lan, Zhenguo Huang, Jiahao Hu, Yinggan Zhang
Summary: The unique properties of MoSi2 open up new opportunities for preparing bulk polymer-derived ceramics with favorable structural-functional capabilities. By utilizing a production route involving re-pyrolysis of ball-milling-induced SiC fillers and flexible precursors blends, in situ formed SiC(rGO, xMoSi(2)) bulk PDCs with optimized properties can be obtained. Notably, these materials exhibit enhanced hardness, fracture toughness, and thermal conductivity, making them promising for emerging uses in the aerospace field.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Keivan A. Nazari, Phuong Tran, Ping Tan, Abdallah Ghazlan, Tuan D. Ngo, Yi Min Xie
Summary: In this study, the Polymer Infiltration and Pyrolysis (PIP) process was used to fabricate ceramic composite prototypes using preceramic polymers with carbon/glass fabrics. The mechanical properties of the ceramic composite samples, such as hardness and compression strength, were experimentally investigated. X-ray micro computed tomography and SEM analysis were conducted to examine the effectiveness of the PIP process.
Article
Materials Science, Ceramics
Marco Pelanconi, Paolo Colombo, Alberto Ortona
Summary: The study introduces a novel hybrid additive manufacturing technique that combines selective laser sintering (SLS) of polyamide powders with preceramic polymer infiltration and pyrolysis to create Silicon Carbide components. The mechanical strength of the resulting ceramic increased up to 24 MPa with more reinfiltration cycles, while the residual porosity decreased to 10%. The microstructure exhibited phases of SiOC and SiC, with SiC derived from the pyrolysis of the preceramic precursor.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Martin Cerny, Zdenek Chlup, Adam Strachota, Jiri Brus, Jana Schweigstillova, Sarka Ryglova, Olga Bicakova
Summary: This study deals with the thermomechanical analysis of four different types of cross-linked preceramic polymers during the pyrolysis process. The research found that the risk of cracking at certain temperatures is high due to the limitation of stress relaxation by the crosslinking of the thermoset microstructure. By conducting in-situ thermomechanical experiments using cyclic indentation method and developing a model to analyze the obtained data, the study provided a comprehensive insight into the gradual changes in mechanical behavior and volume changes during the thermal transformation.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Hyun-Gu Nam, Tae-Hwan Huh, Myungjae Kim, Jiwoong Kim, Young-Je Kwark
Summary: Magnetoceramics composed of pure alpha-Fe crystals grown in an amorphous silicon carbonitride matrix were prepared using specific precursors. The microstructure of the magnetoceramics can be controlled by the precursor composition, resulting in improved magnetic properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Manufacturing
James W. Kemp, Abel A. Diaz, Elizabeth C. Malek, Brendan P. Croom, Zlatomir D. Apostolov, Surya R. Kalidindi, Brett G. Compton, Lisa M. Rueschhoff
Summary: Ultra-high temperature ceramics (UHTCs) are of interest due to their high melting temperatures and ablation resistance, but their widespread use is limited by low fracture toughness and processing challenges. This study introduces fiber-reinforced UHTC matrix composites (UHTCMCs) produced via direct ink writing (DIW), with up to 47.5 vol% of ZrB2 and up to 10 vol% of SiCf. The research demonstrates the successful fabrication of UHTCMCs with aligned fiber reinforcement and discusses defects occurring during the DIW process.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Xiaozhou Wang, Liyan Zhang, Yifei Wang
Summary: Ultra-high-temperature ceramics have excellent resistance and oxidation at high temperatures, and a HfC-SiC precursor (PHCS) was successfully synthesized in this study. The composition, structure, and properties of the PHCS precursor and its pyrolysis products were analyzed, demonstrating that the PHCS precursor is an ideal raw material for the fabrication of ultra-high-temperature ceramics.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Ceramics
Marco Pelanconi, Giovanni Bianchi, Paolo Colombo, Alberto Ortona
Summary: This study reported the fabrication of Silicon infiltrated Silicon Carbide (SiSiC) components using a hybrid additive manufacturing process, combining 3D printing of polymeric preforms with controlled relative density and preceramic polymer infiltration followed by pyrolysis. The final densification was achieved via liquid silicon infiltration, resulting in a nearly fully dense material of beta-SiC and Si in specific volume fractions. This approach eliminates the need for adding ceramic powder to the infiltrating solution, offering an alternative AM method for producing SiSiC ceramics.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Marco Pelanconi, Samuele Bottacin, Paolo Colombo, Alberto Ortona
Summary: This article presents a novel hybrid additive manufacturing technique for fabricating polymer-derived ceramic parts with high geometric complexity. The process involves the use of powder bed fusion technology to create high porous polymeric preforms, which are then converted into ceramics through preceramic polymer infiltration and pyrolysis. Complex structures of a rotated cube and a gyroid with specific dimensions and geometric macroporosity were successfully 3D printed using different preceramic polymers. Despite a significant linear shrinkage, the parts maintained their designed complex shape without deformations. The proposed method offers advantages in terms of using mature polymer powder bed fusion technology for ceramic additive manufacturing and direct fabrication of net-shape complex ceramic parts from preceramic precursors.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Lianzhong Zhao, Xiaofeng Wang, Huiwen Xiong, Kechao Zhou, Dou Zhang
Summary: The utilization of a small amount of thermoplastic polymer in preceramic polymers improves formability in additive manufacturing of 3D structured ceramics, enhancing compatibility and homogeneity in the mixture. This strategy is not only effective for SiC ceramics, but also applicable to a wide range of ceramic systems with appropriate precursors.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Lung-Hao Hu, Jia-Hao Fan
Summary: A wet chemical and pyrolytic process is used to uniformly distribute zirconium oxide in a liquid polysilazane preceramic precursor, forming a zirconium oxide embedded silicon carbonitride ceramic composite film. The film exhibits enhanced hardness and reduced modulus of elasticity. When coated on copper foam, the film significantly improves corrosion resistance and reduces current density.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Polymer Science
Yu-Huan Wu, Li Ye, Ya-Nan Sun, Wei-Jian Han, Tong Zhao
Summary: A novel cyclic Hf-Schiff base polymer was successfully synthesized and converted into HfC/C materials through pyrolysis at 1600°C, offering a new pathway for the fabrication of ultra-high temperature ceramics. This synthetic strategy is characterized by simple operation, efficient reaction, and high yield.
CHINESE JOURNAL OF POLYMER SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Muhammad Anas, Huaixuan Cao, Ju Hyun Oh, Anubhav Sarmah, Carolyn T. Long, Mohammad U. F. Khan, Stephen S. Raiman, Miladin Radovic, Micah J. Green
Summary: This study demonstrates the one-step rapid synthesis of cubic silicon carbide (beta-SiC) by laser-assisted pyrolysis and crystallization of molten polycarbosilane. Dense LISiC and SiC-LISiC coatings can be obtained by repeated polymer infiltration and lasing, and they exhibit stability up to 1073 K in air. Additionally, LISiC can be patterned on various substrates and rapidly heat up in response to radio frequency (RF) fields.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Polymer Science
Deepa Devapal, G. Varughese, T. S. Radhakrishnan, Viswanathan Asari, S. Packirisamy
Summary: Polycondensation of boric acid with mixtures of phenyltriethoxysilane and vinyltriethoxysilane, and with mixtures of phenyltrimethoxysilane and vinyltriethoxysilane in specific conditions resulted in vinyl-functionalized borosiloxane oligomers. The study investigated the influence of different component ratios on the properties of the oligomers.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Qian Wu, Yubo Cui, Guifeng Xia, Jinlong Yang, Shuming Du, Xinhong Xiong, Li Yang, Dong Xu, Xu Deng, Jiaxi Cui
Summary: Passive daytime radiative cooling (PDRC) technology, while promising for global spacing cooling, faces limitations in practical application due to reduced cooling effectiveness caused by wear and dirt contamination. Researchers have developed a renewable armor structure using fluorinated hollow glass microspheres to enhance the anti-fouling and cooling properties of PDRC coatings. The coatings exhibit high solar reflectance and thermal emittance, leading to significant temperature reduction below ambient temperature.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Qiang Bei, Bei Zhang, Kaifeng Wang, Shiming Zhang, Guichuan Xing, Clement Cabanetos
Summary: The power conversion efficiency (PCE) of organic solar cells (OSCs) has reached 20% in recent years, thanks to the advantages of organic photoactive materials. Benzothiadiazole (BT) has attracted significant research attention as a building block of OSCs. OSCs based on BT structure have shown diversity, and the increasing PCE values indicate a promising future for OSCs. This review analyzes the progress made in the last decades, focusing on effective BT small-molecules and BT polymers for OSCs. The structure-property relationships, donor-acceptor matching criteria, and morphology control approaches are discussed. The remaining challenges and a personal perspective on the future advancement of OSCs are summarized.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Rong He, Dandan Tang, Ningge Xu, Heng Liu, Kun Dou, Xuejun Zhou, Fabiao Yu
Summary: Nasopharyngeal carcinoma (NPC) is a common malignant tumor of the head and neck, with a high incidence in China and Southeast Asian countries. In this study, a novel near-infrared fluorescent probe, SNAFL-GSH, was designed and synthesized for the detection of glutathione (GSH). The probe showed selective detection of GSH and the ability to distinguish normal and cancer cells. It has great potential for application in the diagnosis and evaluation of NPC.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Zhukang Guo, Baijiang Jin, Yile Fang, Lian Jin, Song Li, Yan Deng, Zhu Chen, Hui Chen, Yuanying Zhang, Rabia Usman, Nongyue He
Summary: This study isolated primary cells that can be stably passaged from spontaneous tumors of genetically engineered pancreatic ductal adenocarcinoma model mice and used an autonomously developed automated screening instrument for efficient nucleic acid aptamer screening. The obtained aptamers were affinity verified at the cellular level. The study also investigated the impact of cell growth environment difference on the recognition ability of aptamers and confirmed the targeting ability and drug loading ability of the aptamer.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Zhongshan Yang, Qiqi Zhang, Hui Song, Xin Chen, Jiwei Cui, Yanhui Sun, Lequan Liu, Jinhua Ye
Summary: Methane chemistry is a significant area of research in catalysis. Converting methane into value-added chemicals is desirable but challenging due to its high C-H bonding energy and lack of pi bonding or unpaired electrons. Photocatalytic partial oxidation of methane to liquid oxygenates is a promising technology for achieving high efficiency and selectivity under mild conditions. The choice and activation of oxidants are crucial for its performance.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Peng Shan, Jing Liao, Jiayi Li, Chengyan Wang, Jie Zhou, Linqiang Mei, Yunlu Dai, Qiang Wang, Wenyan Yin
Summary: This study reports an oral radioprotectant Gel@GYY that combines a gelatin-based hydrogel and a pH-responsive hydrogen sulfide donor. Gel@GYY has excellent adhesion and sustained release properties, allowing it to release H2S in the gastrointestinal tract and effectively scavenge free radicals induced by radiation. It also reduces inflammation and has biodegradable properties.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Lu Liu, Ziyi Liu, Jingnan Cui, Guiling Ning, Weitao Gong
Summary: The development of new metal-free heterogeneous catalysts has been the subject of extensive research. In this study, a new Troger's base (TB)-derived porous organic polymer (POPs) was designed and prepared by integrating multifunctional monomers. The resulting polymer, which combines the advantages of pillar[5]arene macrocycle and TB moiety, exhibited enhanced catalytic performance in Knoevenagel condensation and CO2 conversion, serving as an effective metal-free catalyst. This work provides a new strategy for fabricating metal-free heterogeneous catalysts based on macrocyclic POPs.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Leyong Zhou, Changyin Yang, Weitao Dou, Tongxia Jin, Haibo Yang, Lin Xu
Summary: This review summarizes the application of micro/nanofluidic techniques in constructing supramolecular assemblies of different scales, and highlights the advantages of these techniques over conventional synthesis methods. Furthermore, it emphasizes the potential of micro/nanofluidic systems in improving our understanding of supramolecular self-assembly processes.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Yanchao Jin, Suixiaochen Chen, Peiwen Huang, Xiongjian Chen, Chun-Yan Lin, Li-Ping Li, Xiao Chen, Rui Ding, Jianxi Liu, Riyao Chen
Summary: In this study, magnesium and coconut shell carbon were used to disinfect water by adsorbing copper(II) and converting dissolved oxygen to hydrogen peroxide through Mg corrosion. The copper was enriched on the carbon surface and efficiently catalyzed the hydrogen peroxide to inactivate E.coli. The process showed promising disinfection performance both in laboratory experiments and real wastewater treatment.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Haihong Lai, Zehong Chen, Hao Zhuo, Yijie Hu, Xuan Zhao, Jiwang Yi, Hongzhi Zheng, Ge Shi, Yifan Tong, Ling Meng, Xinwen Peng, Linxin Zhong
Summary: By altering the pyrolysis route of cellulose nanofiber, the structural defects of carbon aerogels can be reduced, leading to improved compressibility and stress retention, as well as higher stress sensor sensitivity and temperature coefficient.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Lina Guo, Jinsong Ding, Wenhu Zhou
Summary: Bacteria-based tumor therapy has resurfaced due to the revolution of tumor immunotherapy, offering unique solutions for traditional tumor treatments. Bacteria with active tropism can selectively colonize tumor sites and suppress tumor growth through various mechanisms, making them attractive tools for tumor treatment. This critical review introduces recent advances in bacteria-based tumor therapy, including bacterial properties, their benefits for tumor therapy, anti-tumor mechanisms, challenges, and future perspectives.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Lan Liang, Chuanbin Wang, Xukai Lu, Yunan Sun, Beibei Yan, Ning Li, Guanyi Chen, Li'an Hou
Summary: This study investigates the interactions between phenol and benzaldehyde in the ECH process through experiments and theoretical calculations. The results show that phenol can accelerate the conversion of benzaldehyde, while benzaldehyde inhibits the conversion of phenol. The research provides a theoretical basis for the application of ECH in practical bio-oil upgrading.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Pengcheng Fan, Yuhao He, Junan Pan, Ning Sun, Qiyu Zhang, Chen Gu, Kang Chen, Weinan Yin, Longlu Wang
Summary: This study focuses on the recent progress in hydrogen evolution reaction (HER) based on photothermal effect. It introduces the main pathways of photothermal conversions applied in H2 evolution, summarizes the functions of the photothermal effect, and presents a method to improve the catalytic system through thermal means. The study also discusses the challenges and outlook in this promising area.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Leiduo Lai, Hongyu Zhou, Yichen Hong, Mengfan Luo, Yang Shi, Heng Zhang, Zhaokun Xiong, Gang Yao, Bo Lai
Summary: In this study, a facile ammonia reduction strategy was proposed and a novel FeVO3-x catalyst was synthesized for the activation of peroxymonosulfate (PMS) to degrade the pharmaceutical carbamazepine (CBZ). The results showed that the system could rapidly degrade CBZ and generate various active species involved in the degradation process.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Tangxin Xiao, Xiuxiu Li, Liangliang Zhang, Kai Diao, Zheng-Yi Li, Xiao-Qiang Sun, Leyong Wang
Summary: This study presents the construction of a supramolecular light harvesting system based on sequential energy transfer. The system demonstrates tunable fluorescence emission through self-assembly of polymers into nanoparticles, achieving efficient two-step light harvesting.
CHINESE CHEMICAL LETTERS
(2024)