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On the use of wood charcoal filler to improve the properties of natural fiber reinforced polymer composites

Materials Today: Proceedings 2021年 44卷 926-929页

作者： Subrata Chandra Das Sheikh Ashek-E-Khoda Md. Abu Sayeed Suruzzaman Debasree Paul Sajib Aninda Dhar Sotirios A. Grammatikos Advanced and Sustainable Engineering Materials Laboratory Group of Sustainable Composites Department of Manufacturing and Civil Engineering Norwegian University of Science and Technology Gjøvik 2815 Norway Department of Textile Engineering Khwaja Yunus Ali University Sirajgonj Bangladesh Bangabandhu Textile Engineering College Tangail Affiliated by University of Dhaka Bangladesh Department of Textile Engineering Mawlana Bhashani Science and Technology University Tangail 1902 Bangladesh Pilot Plant and Process Development Centre Bangladesh Council of Scientific and Industrial Research Dhaka 1205 Bangladesh

This study aims to analyze the incorporation of widely available, cheap and biobased waste material such as wood charcoal which is used as filler in natural fiber reinforced polymer composites. Jute woven fabric (1 × 1 plain weave) was used as a natural fiber reinforcement, unsaturated polyester resin was used as matrix material, and wood charcoal powder used as bio-filler to manufacture various composite material formulations of 25% fiber weight fraction. The wood charcoal filler loadings were 4, 8, 12, 16 and 20 wt% in the polymer matrix of the composites. The developed composite formulations were tested in terms of mechanical and physicochemical properties. Improved tensile properties were revealed with a 4 wt% filler modification, compared to the reference (unmodified) polymer composite. Nonetheless, further increase of filler (8–20 wt%), led to lower mechanical properties. Thermogravimetric analysis showed increased thermal stability of the 4 wt% charcoal filler modified composite compared to the reference one.

关键词： Natural fibers Natural fillers Biomass resources Wood charcoal fillers Natural fiber composites (NFCs) TGA

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Enhanced etch characteristics of EUV PR masked SiON through the ion beam grid pulsing technique

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Scientific Reports 2025年第1期15卷 1-11页

作者： Kwon, Hae In Jang, Yun Jong Kim, Kyoung Chan Gil, Hong Seong Kim, Ju Young Ryu, Seong Hyun Pyun, Do Seong Kim, Dae Whan Park, Woo Chang Lee, Ji Yeon Park, Jin Woo Park, Sang Wuk Yeom, Geun Young School of Advanced Materials Science and Engineering Sungkyunkwan University Suwon 16419 South Korea Department of Photovoltaic System Engineering Sungkyunkwan University Suwon 16419 South Korea School of Chemical Engineering Sungkyunkwan University Suwon 16419 South Korea Department of Semiconductor Display Engineering Sungkyunkwan University Suwon 16419 South Korea Advanced Process Development Semiconductor R & D Center Samsung Electronics Co. Ltd. Hwaseong 18448 South Korea SKKU Advanced Institute of Nano Technology (SAINT) Sungkyunkwan University Suwon 16419 South Korea

EUV lithography technology, applied in nano-patterning processes, enables the creation of fine patterns below 10 nm. However, issues still remain due to the reduced etch selectivity and increased line edge roughness (LER) caused by the thin thickness and weakness of organic EUV photoresist (PR). In this study, research was conducted to improve the low etch selectivity and high LER using a novel grid pulsed ion beam etching technique. In this system, Ar/H2 plasma is generated in the inductively coupled plasma (ICP) source, and the Ar⁺/Hx⁺ ion beam is irradiated while fluorocarbon gas is injected into the process chamber. Grid pulsing technique increases the etch selectivity of SiON over EUV PR while improving LER. With a 50% duty ratio and optimal gas flow conditions (Ar:H2 ratio = 1:3 to the ion beam source and CF4:C4F8 = 1:1), the etch selectivity of SiON over EUV PR approached ∞ while maintaining the LER close to the reference.

关键词： Etch selectivity EUV PR Grid pulsing Ion beam etching LER SiON

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Discovery of STAT3 and Histone Deacetylase (HDAC) Dual-Pathway Inhibitors for the Treatment of Solid Cancer

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Journal of medicinal chemistry 2021年第11期64卷 7468-7482页

作者： Yuhao Ren Shanshan Li Ren Zhu Chengying Wan Dongmei Song Jiawen Zhu Guiping Cai Sihui Long Lingyi Kong Wenying Yu Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines China Pharmaceutical University 24 Tong Jia Xiang Nanjing 210009 People's Republic of China. Key Laboratory for Green Chemical Process of Ministry of Education Hubei Key Laboratory of Novel Reactor and Green Chemical Technology Hubei Engineering Research Center for Advanced Fine Chemicals School of Chemical Engineering and Pharmacy Wuhan Institute of Technology 206 1st Rd Optics Valley East Lake New Technology Development District Wuhan Hubei 430205 China.

Nowadays, simultaneous inhibition of multiple targets through drug combination is an important anticancer strategy owing to the complex mechanism behind tumorigenesis. Recent studies have demonstrated that the inhibition of histone deacetylases (HDACs) will lead to compensated activation of a notorious cancer-related drug target, signal transducer and activator of transcription 3 (STAT3), in breast cancer through a cascade, which probably limits the anti-proliferation effect of HDAC inhibitors in solid tumors. By incorporating the pharmacophore of the HDAC inhibitor SAHA (vorinostat) into the STAT3 inhibitor pterostilbene, a series of potent pterostilbene hydroxamic acid derivatives with dual-target inhibition activity were synthesized. An excellent hydroxamate derivate, compound , inhibited STAT3 ( = 33 nM) and HDAC (IC = 23.15 nM) with robust potency . Compound also showed potent anti-proliferation ability and . Our study provides the first STAT3 and HDAC dual-target inhibitor for further exploration.

关键词： Cells Inhibitors Inhibition Cancer Peptides and proteins

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Dual activation pathways based on OH-functionalized alk-Ti3C2 MXene/RuOx boosting the hydrogen generation

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Chinese Chemical Letters 2025年第8期36卷

作者： Wu, Chongbei Wang, Benzhi Li, Xuan Gu, Jiaxuan Wu, Yihan Zhao, Zhe Jia, Pengfei Jiang, Jizhou Hebei Key Laboratory of Man-machine Environmental Thermal Control Technology and Equipment Hebei Center for Industrial Energy-saving and Pollution Control Research Hebei Vocational University of Technology and Engineering Xingtai 054000 China School of Mechanical Engineering and Institute of Advanced Machinery & Technology Sungkyunkwan University 2066 Seobu-ro Suwon 16419 South Korea School of Material Science and Engineering Key Laboratory of Green Chemical Engineering Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Wuhan Institute of Technology Wuhan 430205 China

A meticulous design of the local environment at the interface between active species and the support, aimed at optimizing the adsorption of H2O molecules and BH4− anion, offers an ideal strategy for enhancing hydrogen... 详细信息

A meticulous design of the local environment at the interface between active species and the support, aimed at optimizing the adsorption of H2O molecules and BH4⁻ anion, offers an ideal strategy for enhancing hydrogen generation via NaBH4 hydrolysis through dual activation pathways. Theoretical predictions based on d-band center analysis and electron transfer calculations suggest that introducing -OH functional groups induce charge redistribution, enhancing charge concentration on alk-Ti3C2 and facilitating the adsorption and activation of dual active species, H2O molecules and BH4⁻ anion. Inspired by these predictions, the optimized alk-Ti3C2/RuOx catalyst demonstrates the highest catalytic activity, achieving a hydrogen generation rate (HGR) of 9468 mL min⁻¹ gcat.⁻¹. Both experimental data and theoretical analyses confirm that the -OH functional groups promote charge enrichment on alk-Ti3C2, optimizing the adsorption of H2O molecules and BH4⁻ anion, and reducing the dissociation energy barrier of the *OH[sbnd]H-TS intermediate. This dual activation pathways mechanism lowers the activation energy for NaBH4 hydrolysis, significantly enhancing the HGR performance. These findings, guided by theoretical insights, establish alk-Ti3C2/RuOx as an efficient catalyst for NaBH4 hydrolysis and provide a strong foundation for future hydrogen generation catalyst designs.

关键词： Alk-Ti3C2/RuOx Catalytic mechanism Dual activation pathways NaBH4 hydrolysis Theoretical calculation

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Polypyrrole-Derived Carbon Nanotubes for Potential Application in Electrochemical Detection of Dopamine

SSRN

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SSRN 2022年

作者： Wang, Yangyuchuang Yao, Wenzi Huang, Huabo Huang, Juan Li, Liang Yu, Xianghua Key Laboratory for Green Chemical Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization Ministry of Education Hubei Key Laboratory of Plasma Chemistry and Advanced Materials School of Materials Science and Engineering Wuhan Institute of Technology Wuhan430205 China Key Laboratory of Green Processing and Functional New Textile Materials Ministry of Education School of Textile Science and Engineering Wuhan Textile University No.1 Sunshine Avenue Wuhan430200 China Key Laboratory of Optoelectronic Chemical Materials and Devices Ministry of Education Jianghan University Wuhan430056 China

A novel electrochemical sensor for dopamine (DA) is developed based on heteroatom-doped carbon nanotubes derived from polypyrrole. X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, specific surface analyzer, and cyclic voltammetry are employed to characterize the microstructure and property of the products. The electrochemical catalytic activities of heteroatom-doped carbon nanotubes modified glassy carbon electrode (GCE) towards DA are further investigated by cyclic voltammetry, amperometry, and differential pulse voltammetry. The results indicate that heteroatom-doped carbon nanotubes prepared by pyrolysis of polypyrrole nanotubes at 800 oC possessed higher specific surface area and better electrochemical activity compared with others obtained at different temperatures. Therefore, the electrochemical sensor fabricated by the heteroatom-doped carbon nanotubes shows excellent detection ability towards DA as well as remarkable anti-interference ability and stability. These features collectively endow the polypyrrole-derived carbon nanotubes with a promising application for the fabrication of electrochemical sensors. © 2022, The Authors. All rights reserved.

关键词： Carbon nanotubes

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Sea-Urchin-Structured Nico2o4 Decorated Nitrogen-Doped Graphene for Enhanced Electrochemical Detection of Ascorbic Acid

SSRN

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SSRN 2022年

作者： Chen, Xingchao Yang, Zixian Tuo, Xin Huang, Huabo Huang, Juan Li, Liang Yu, Xianghua Key Laboratory for Green Chemical Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Hubei Key Laboratory of Plasma Chemistry and Advanced Materials School of Materials Science and Engineering Wuhan Institute of Technology Wuhan430205 China Key Laboratory of Green Processing and Functional New Textile Materials of Ministry of Education School of Textile Science and Engineering Wuhan Textile University No.1 Sunshine Avenue Wuhan430200 China Key Laboratory of Optoelectronic Chemical Materials and Devices Ministry of Education Jianghan University Wuhan430056 China

A convenient and cost-effective route for the synthesis of sea-urchin-structured NiCo2O4 decorated nitrogen-doped graphene was demonstrated. The morphology, composition, and electrochemical properties of the obtained products were characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and cyclic voltammetry. The electrocatalytic behaviors of sea-urchin-structured NiCo2O4 decorated nitrogen-doped graphene-modified glass carbon electrodes were investigated by cyclic voltammetry and chronoamperometry. The as-prepared electrode exhibited distinguished electrocatalytic oxidation of ascorbic acid. The linear response relationship for ascorbic acid was obtained ranging from 2.0 mM to 6 mM with a rapid response time of less than 2 s and a low detection of the limit of 0.39 mM (signal/noise = 3), which could be attributed to the high conductivity, high electroactivity for electrocatalytic oxidation of ascorbic acid, as well as high specific surface area of sea-urchin-structured NiCo2O4 decorated nitrogen-doped graphene. In addition, the modified electrode showed good anti-interference ability, long-term stability, and high reproducibility. The excellent electrocatalytic behavior of sea-urchin-structured NiCo2O4 decorated nitrogen-doped graphene may make it promising for applications in electrochemical analysis. © 2022, The Authors. All rights reserved.

关键词： Ascorbic acid

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Synergetic Integration of Machining Metal Scrap for Enhanced Evaporation in Solar Stills: A Sustainable Novel Solution for Potable Water Production

SSRN

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SSRN 2023年

作者： Peddojula, Mohana Krishna Suraparaju, Subbarama Kousik Samykano, Mahendran Vyasa Krishnaji, C.S. Kadambari Pathan, Yasin Zaza, Afaf Kanth, Krishna V. Rajamony, Reji Kumar Natarajan, Sendhil Kumar Budala, Swapna Babu Andhra Pradesh Tadepalligudem534101 India Centre for Research in Advanced Fluid and Process University Malaysia Pahang Al-Sultan Abdullah Lebuhraya Tun Razak Gambang Pahang Kuantan26300 Malaysia Andhra Pradesh Tadepalligudem534101 India Department of Mechanical Engineering CVR College of Engineering Telangana Hyderabad India Km 2 Route Regional R206 Benguerir Morocco Department of Mechanical Engineering Raghu Engineering College Andhra Pradesh Visakhapatnam India Jalan IKRAM-UNITEN Selangor Kajang Malaysia Division of Research and Development Lovely Professional University Punjab Phagwara144411 India Solar Energy Laboratory Department of Mechanical Engineering National Institute of Technology Puducherry UT of Puducherry Karaikal609609 India

The global water crisis necessitates innovative solutions for sustainable potable water production. Solar stills represent a promising technology for harnessing solar energy to meet this demand. However, solar stills often face limitations regarding yield and cost-effectiveness. This research addresses the pressing need to augment the performance of solar stills by introducing amendments such as utilizing black-coated metal scrap as a photothermal absorber in the absorber basin. These modifications aim to boost the absorption of solar radiation, thereby increasing potable water yield and improving the system's economic viability. The study explores the utilization of black-coated metal scrap as a photothermal absorber to modify the absorber basin. Experimental results demonstrate a significant improvement in potable water yield, with a 129.85% increase on day 1 and 127.21% on day 2, reaching 3080 mL/m2 and 3090 mL/m2, respectively. Compared to conventional solar stills, the newly developed double slope solar still with an absorber basin featuring metal scrap exhibits a remarkable economic advantage, with a payback period (PBP) of 5.4 months, as opposed to 9.45 months for the traditional system. Additionally, the cost per liter (CPL) of potable water generated by the innovative system is 75.53% lower than that of the conventional solar still system © 2023, The Authors. All rights reserved.

关键词： Desalination

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Coherent EUV scatterometry of 2D periodic structure profiles with mathematically optimal experimental design

arXiv

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arXiv 2025年

作者： Klein, Clay Jenkins, Nicholas W. Shao, Yunzhe Li, Yunhao Park, Seungbeom Kim, Wookrae Kapteyn, Henry C. Murnane, Margaret M. Department of Physics JILA & STROBE NSF Science & Technology Center University of Colorado & NIST BoulderCO United States Core Technology R&D Team Mechatronics Research Samsung Electronics Co. Ltd. Hwasung Korea Republic of Advanced Process Development Team 4 Semiconductor R&D Center Samsung Electronics Co. Ltd. Hwasung Korea Republic of KMLabs Inc. 4775 Walnut Street #102 BoulderCO80301 United States

Extreme ultraviolet (EUV) scatterometry is an increasingly important metrology that can measure critical parameters of periodic nanostructured materials in a fast, accurate, and repeatable manner and with high sensitivity to nanoscale structure and material composition. Because of this, EUV scatterometry could support manufacturing of semiconductor devices or polymer metamaterials, addressing the limitations of traditional imaging methods such as resolution and field of view, sample damage, throughput, or low sensitivity. Here we use EUV scatterometry to measure the profile of an industrially relevant 2D periodic interconnect structure, using λ = 29 nm light from a table-top high harmonic generation source. We show that EUV scatterometry is sensitive to out-of-plane features with single-nanometer sensitivity. Furthermore, we also apply a methodology based on the Fisher information matrix to optimize experimental design parameters, such as incidence angles and wavelength, to show how measurement sensitivity can be maximized. This methodology reveals the strong dependence of measurement sensitivity on both incidence angle and wavelength — even in a simple two-parameter case. Through a simultaneous optimization of incidence angles and wavelength, we determine that the most sensitive measurement of the quantities of interest can be made at a wavelength of ∼14 nm. In the future, by reducing sample contamination due to sample preparation, deep sub-nanometer sensitivity to axial profiles and 2D structures will be possible. Our results are an important step in guiding EUV scatterometry towards increased accuracy and throughput with a priori computations and by leveraging new experimental capabilities. © 2025, CC BY.

关键词： Fisher information matrix

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Preparation and Properties of C/SiC Composites Reinforced by High Thermal Conductivity Graphite Films

Research Square

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Research Square 2020年

作者： Zhao, Jiajia Cai, Rong Ma, Zhaokun Zhang, Kaixuan Liang, Hengliang Qiu, Haipeng Liu, Shanhua Xie, Weijie Beijing Key Laboratory Electrochemical Process and Technology for Materials State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing100029 China Changzhou Institute of Advanced Materials Beijing University of Chemical Technology Changzhou213164 China AVIC Composite Technology Center Beijing101300 China Technical Development Department AVIC Composite Corporation LTD Beijing101300 China

Ablation resistance as one important factor affecting the service life of SiC ceramic matrix composites that is highly valued in aerospace science and technology. In this study, high thermal conductivity (HTC) graphite films and carbon fibers reinforced C/SiC composites simultaneously, fabricating by precursor infiltration and pyrolysis (PIP) technology, to improve the ablation resistance of C/SiC composites. Three C/SiC composites were prepared from different quantity ratios of 2D fiber cloth to HTC graphite film with values of 1:0, 1:1, and 1:10. The microstructure, mechanical properties, thermal conductivity and ablation performance of C/SiC composites after plasma ablation test at 1500 °C for 600 s were investigated. The results showed that with the increase of graphite films’ contents, the thermal conductivity of composites was increased from 9.78 W/(m·K) to 333.34 W/(m·K). Additionally, the mass loss rate reduced from 1.18 to 0.74 mg/s and the linear ablation rate reduced from 0.64 to 0.18 mm/s, indicating that the addition of graphite films could effectively improve the ablation resistance of C/SiC composites. © 2020, CC BY.

关键词： Silicon carbide

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Niobium addition effect in molds at last cooling step on EN-GJL250 gray cast iron: Microstructural changes and electrochemical behavior

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China Foundry 2018年第3期15卷 228-235页

作者： M.O.Azzoug N.Boutarek-Zaourar D.Aboudi N.Madaoui E.Mossang S.Chentouf Laboratory of Materials Technology Faculty of Mechanical Engineering and Process EngineeringUniversity of Science and Technology Houari Boumediene Ionized Media Division Center for Advanced Technology Development CDTA NEEl Institute National Center for Scientific Research Department of Mechanical Engineering School of Technology Superior

The purpose of this study was to determine the impact of niobium addition as an inoculation element on the microstructure and electrochemical properties of EN-FGL250 gray cast iron. Niobium additions are in a powder form and have a 0.5 mm particle size at dfferent proportions of 1 wt.% and 3 wt.%. The addition was done during casting of the metal in the mold at the last cooling step of the melt cast iron. These additions have a significant impact on the phenomenon of solidifi cation as the metal powder deposited in the sand molds creates new centers of germination and absorbs a lot of heat. The cooling rate directly affects the microstructure and electrochemical behavior. This is confirmed by SEM observations and electrochemical tests. Furthermore, the addition of niobium transforms the microstructure of gray cast iron from cellular structure into totally dendritic structure. As a consequence, the niobium addition affected the shape and size of graphite, thus considerably reducing the corrosion current density by increasing the polarization resistance Rp.

关键词： Lamellar cast iron microstructure lamellar graphite shapes niobium inoculation corrosion resistance

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