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Effect of Impregnation of Liquid Sodium Silicate on Thermal Properties of Paper

Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry 2022年第6期54卷 60-67页

作者： Park, Gwon-Hui Kim, Younglae Cho, Byoung-Uk Department of Paper Science & Engineering College of Forest and Environmental Sciences Kangwon National University Korea Republic of Program of Paper Material Science & Engineering College of Forest and Environmental Sciences Kangwon National University Korea Republic of

Heat-resistant insulators are the core materials in fire doors and are directly related to people’s safety in a fire. Heverever, there needs to be a material that possesses heat resistance and insulation with reasonable production cost. To develop a core material for fire doors based on recycled paper, such as copy paper and linerboard, were impregnated with liquid sodium silicate and the effects of the sodium silicate content on the thermal properties of paper were investigated. It was observed that liquid soidum silicate can be used as a flame retardant when manufacturing fire door core materials. Imprenation of liquid sodium silicate delayed both glowing and burning temperatures along with an increased weight of residues after combustion over 750℃. Hence, it is possible to manufacture an incombustible material based on recycled papers by adding liquid sodium silicate and inorganic materials that do not themally decompose over 750℃. © 2022 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

关键词： Impregnation

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An effective strategy to inhibit grain coarsening:Construction of multi-element co-segregated grain boundary complexion

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Journal of Advanced Ceramics 2024年第7期13卷 1060-1071页

作者： Le Fu Gabriel Arcuri Wenjun Yu Bohan Wang Zihua Lei Ying Deng Kathryn Grandfield School of Material Science and Engineering Central South UniversityChangsha 410083China Canadian Centre for Electron Microscopy McMaster UniversityHamilton L8S 4L8Canada State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Department of Materials Science and Engineering McMaster UniversityHamilton L8S 4L8Canada

When exposed to moderate to high temperatures,nanomaterials typically suffer from severe grain coarsening,which has long been a major concern that prevents their wider ***,we proposed an effective strategy to inhibit grain coarsening by constructing grain boundary(GB)complexions with multiple codoped dopants,which hindered coarsening from both energetic and kinetic *** demonstrate the feasibility of this strategy,multiple selected dopants were doped into a ZrO_(2)-SiO_(2)nanocrystalline glass ceramic(NCGC)to form GB *** results showed that NCGC was predominantly composed of ZrO_(2)nanocrystallites(NCs)distributed in an amorphous SiO_(2)*** layers of GB complexions(~2.5 nm)were formed between adjacent ZrO_(2)NCs,and they were crystalline superstructures with co-segregated *** addition,a small amount of quartz solid solution was formed,and it adhered to the periphery of ZrO_(2)NCs and bridged the adjacent NCs,acting as a“bridging phase”.The GB complexions and the“bridging phase”synergistically enhanced the coarsening resistance of ZrO_(2)NCs up to 1000°*** findings are important for understanding GB complexions and are expected to provide new insights into the design of nanomaterials with excellent thermodynamic stability.

关键词： Zr_(2)-Si_(2) multi-element co-segregation grain boundary(GB)complexion grain coarsening atom probe tomography(APT)

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Biomimetic design of highly flexible metal oxide nanofibrous membranes with exceptional mechanical performance for superior phosphopeptide enrichment

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Nano Research 2024年第5期17卷 4270-4278页

作者： Xue Mao Zhen-Zhen Li Dong-Lian Hao Wei-Dong Han Gao-Peng Li Yao-Yu Wang Kun Zhang School of Textile Science and Engineering Key Laboratory of Functional Textile Material and Product(Ministry of Education)Xi’an Polytechnic UniversityXi’an 710048China Key Laboratory of Magnetic Molecules&Magnetic Information Materials of the Ministry of Education School of Chemistry&Material ScienceShanxi Normal UniversityTaiyuan 030031China Department of Clinical Laboratory The Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710004China Shanghai iProteome Biotechnology Co. LtdShanghai 201210China College of Chemistry&Materials Science Northwest UniversityXi'an 710127China

Developing free-standing and mechanical robust membrane materials capable of superior enrichment of phosphopeptides for analyzing and identifying the specific phosphoproteome of cancer cells is significant in understanding the molecular mechanisms of cancer development and exploring new therapeutic approaches,but still a significant challenge in materials *** this end,we firstly constructed highly flexible ZrTiO_(4) nanofibrous membranes(NFMs)with excellent mechanical stability through a cost-effective and scalable electrospinning and subsequent calcination ***,to further increase the enrichment capacity of the phosphopeptide,the biomimetic TiO_(2)@ZrTiO_(4) NFMs with root hair or leaf like branch microstructure are developed by the hydrothermal post-synthetic modification of ZrTiO_(4) NFMs through growing unfurling TiO_(2) nanosheets onto the ZrTiO_(4) ***,remarkable flexibility and mechanical stability enable the resulting TiO_(2)@ZrTiO_(4) NFMs excellent practicability,while the biomimetic microstructure allows it outstanding enrichment ability of the phosphopeptide and identification ability of the specific phosphoproteins in the digest of cervical cancer ***,6770 phosphopeptides can be enriched by TiO_(2)@ZrTiO_(4) NFMs(2205 corresponding phosphoproteins can be identified),and the value is much higher than that of ZrTiO_(4) NFMs(6399 phosphopeptides and 2132 identified phosphoproteins)and commercial high-performance TiO_(2) particles(4525 phosphopeptides and 1811 identified phosphoproteins).These results demonstrate the super ability of TiO_(2)@ZrTiO_(4) NFMs in phosphopeptide enrichment and great potential for exploring the pathogenesis of cancer.

关键词： inorganic nanofibers flexible ceramic nanofibrous membranes biomimetic materials exceptional mechanical performance flexibility

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Reduction in soiling loss of PV module using hydrophobic coating with different water contact angle

Reduction in soiling loss of PV module using hydrophobic coa...

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2023 ISES Solar World Congress, SWC 2023

作者： Vishwanath, Shivam Abhinav, Anand Mallick, Sudhanshu Centre for Research in Nanotechnology & Science Indian Institute of Technology Bombay Mumbai India Department of Metallurgical Engineering and Material Science Indian Institute of Technology Bombay Mumbai India

ISBN: (纸本)9783982040899

The deposition of dust particles on Photovoltaic (PV) surfaces is a well-known problem affecting solar panels' performance by reducing their efficiency. Dust and other soiling agents hinder the absorption of solar energy by photovoltaic cells. Consequently, this decreases energy generation, resulting in considerable losses to the PV industry. Hydrophobic coatings are known to reduce soil deposition on any surface. The objective of the present study is to compare the soiling loss of PV modules with and without hydrophobic coatings. Hydrophobic coatings with varying water contact angles (WCA) were applied to PV modules. Uncoated and coated mini-modules were kept for dust deposition in a simulated soiling chamber at different tilt angles to mimic real-world conditions. The soil deposition on coated PV mini-module is significantly less than on uncoated mini-module, leading to lower soiling loss. It indicates that applying hydrophobic coatings is an effective way to reduce the impact of soiling. © 2023. The Authors.

关键词： Dust

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Study on the Characteristics of Novel Natural Fiber Extracted from Crescentia cujete Plant Fruits—An Alternate Reinforcement for Synthetic materials

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Journal of The Institution of Engineers (India): Series D 2024年 1-9页

作者： Raja, Thandavamoorthy Yuvarajan, Devarajan Material Science Lab Saveetha Dental College and Hospitals SIMATS Saveetha University Tamil Nadu Chennai600077 India Department of Mechanical Engineering Saveetha School of Engineering SIMATS Saveetha University Tamil Nadu Chennai600124 India

This study presents a comprehensive analysis of novel natural fibers extracted from Crescentia cujete plant fruits, exploring their potential as an alternative reinforcement to synthetic materials. Employing a range of characterization techniques, XRD analysis revealed a semi-crystalline structure with a significant crystallinity index of 0.81 and the crystal region of 53.8%, indicating potential for robust applications. FTIR spectroscopy identified key functional groups of the major peak observed at 1020 cm−1 which is related to hemicellulose, C–O–C stretching vibrations in the glycosidic linkages of cellulose, essential for understanding the fibers' chemical composition. Tensile strength tests showed the fibers possess substantial strength of 8.9 MPa and flexibility, making them suitable for reinforcing materials. SEM analysis provided insights into the fibers' surface morphology, crucial for applications requiring strong interfacial bonding. EDX results confirmed the presence of essential elements, highlighting the fibers' natural composition. Furthermore, the antibacterial properties of these fibers were evaluated, showing effectiveness against common bacterial strains, thus broadening their application scope in medical and hygiene products. © The Institution of Engineers (India) 2024.

关键词： Reinforcement

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In situ regulating intimately connected heterostructure by decomposition of solid solution oxides toward high-efficient water oxidation

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Rare Metals 2024年第4期43卷 1557-1569页

作者： Shao-Fei Zhang Xiao-Lu Yin Jin Wang Jian-Li Kang Tian-Tian Li Jin-Feng Sun Yong-Qiang Meng Jian-Jiang Wang Dian-Long Wang Kai-Qiang Qin Hebei Key Laboratory of Flexible Functional Materials/Hebei Key Laboratory of Material Near-Net Forming Technology School of Materials Science and EngineeringHebei University of Science and TechnologyShijiazhuang050018China Key Laboratory of Advanced Ceramics and Machining Technology/Ministry of Education School of Materials Science and EngineeringTianjin UniversityTianjin300072China Electrochemical Engine Center Department of Mechanical EngineeringPennsylvania State UniversityUniversity ParkPA16802USA

Heterogeneous interfaces produced by interdomain interactions on a nanoscale performs a crucial role in boosting the properties of an electrocatalyst toward oxygen evolution reaction(OER)***,a series of dual-phase electrodes with intimately connected heterointerfaces are prepared by in situ decomposing solid solution oxide of Ni_(x)Co_(y)Fe_(100-x-y)O,which grew on Ni foam massively via an ultrafast combustion ***,with high-reaction kinetics caused by the reduction treatment at 450℃,the less electronegative Fe and Co are more oxyphilic than Ni,which facilitated their co-exsolution and formation of CoFe_2O_4/NiO oxide with enriched oxygen *** from the nanoporous framework,heterojunction structure,and oxygen defects,the self-supporting electrodes present rapid charge/mass transmission and provide abundant active sites for *** optimized sample(R-SNCF4.5)shows low overpotentials of 226 and 324 mV at 10 and100 mA·cm^(-2),a small Tafel slope(46.7 mV·dec^(-1)),and excellent *** assembled R-SNCF4.5//Pt/C/NF electrolyzer demonstrates continuous electrolysis over 50 h at a current density of 10 mA·cm^(-2),under 1.51 *** functional theory(DFT)calculations verify that the strong electronic modulation plays a critical part in the CoFe_2O_4/NiO hybrid by lowering the energy barriers for the ratedetermining steps,and Fe sites are the most active OER sites.

关键词： Rapid combustion Decomposition of solid solution oxide Dual-phase heterostructure Oxygen evolution reaction Theoretical calculation

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Lightweight Si_(3)N_(4)@SiO_(2) ceramic foam for thermal insulation and electromagnetic wave transparency

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Nano Research 2024年第5期17卷 4298-4306页

作者： Zongwei Tong Xiangjie Yan Yuexiang Wang Kexun Li Weihai Ma China-Blarus Belt and Road Joint Laboratory on Electromagnetic Environment Effect the 33rd Research Institute of ChinaElectronics Technology Group CorporationTaiyuan 030032China Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education School of Material Science and EngineeringTianjin UniversityTianjin 300072China Department of Materials Science and Engineering Jinzhong UniversityJinzhong 030619China

Increasing porosity is one of the most direct ways to improve the thermal insulation and dielectric properties of *** now,many wet methods for preparing Si_(3)N_(4) ceramic foams usually face the problems of complex rheology,long period,and expensive cost,and the reported pore sizes of Si_(3)N_(4) ceramic foams are typically micron-grade,resulting in a lack of competitiveness in thermal insulation and wave-transparent *** this paper,the Si_(3)N_(4)@SiO_(2) ceramic foams were prepared using an efficient dry-method,which combined three processes of low temperature chemical vapor deposition(LTCVD),template,and isostatic *** method has the advantages of simple operation and short preparation period,and can realize near-net size molding and mass *** addition,the evolution mechanisms of honeycomb microstructure and composition of Si_(3)N_(4)@SiO_(2) ceramic foam during sintering were studied by chemical reaction *** as-prepared Si_(3)N_(4)@SiO_(2) ceramic foam possesses low density(0.377 g·cm^(-3)),high compressive strength(7.5 MPa),low thermal conductivity(0.0808 W·m^(-1)·K^(-1)),and excellent dielectric properties(ε<1.32,tanδ<0.009)in the frequency range of 8-18 GHz,and its maximum working temperature in air can reach up to 1100℃.It will be recommended to be applied in the interlayer of Si_(3)N_(4) ceramic radome to improve its thermal insulation and electromagnetic wave transparency performances.

关键词： silicon nitride ceramic foam honeycomb microstructure dielectric properties thermal insulation

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CsPbX3 nanocrystals embedded in hollow AlO(OH) nanosheet assemblies towards highly bright flexible multicolor emitting films

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Journal of materials Chemistry C 2023年第23期11卷 7654-7661页

作者： He, Jinchan Zhang, Xiao Xie, Cong Chen, Hsueh Shih Yang, Ping School of Material Science and Engineering University of Jinan Jinan250022 China Faculty of Chemical Engineering and Technology Cracow University of Technology Krakow31-155 Poland Department of Materials Science & Engineering National Tsing Hua University Hsinchu City300 Taiwan

Because of their inherent ionic properties, inorganic cesium halide lead perovskite nanocrystals (NCs) are normally unstable in light and heat environments as well as polar solvents, which seriously limit their practical application. In this paper, AlO(OH) nanosheets were assembled into hollow mesoporous spheres to encapsulate CsPbX3 NCs for increasing stability according to the powerful adsorption of AlO(OH) on Pb ions. The hollow AlO(OH) assemblies were created via hydrothermal synthesis. The in situ growth of CsPbX3 NCs in AlO(OH) assemblies was then finished in dimethylformamide solutions. After encapsulation, the stability of the NCs was greatly improved and the exchange reaction of halogen ions was effectively prevented. The NCs in the assemblies exhibited high PL quantum yields (PLQYs). Namely, blue-, green-, and red-emitting CsPbX3 (X = Cl, Br, and I)@AlO(OH) composites were fabricated. The composites were further mixed with polystyrene (PS) to prepare a flexible photoluminescent (PL) film with excellent bendable and foldable properties. The initial PLQYs of blue-, green-, and red-emitting CsPbX3@AlO(OH) composites were found to be 48.2, 96.4, and 43.7%, respectively. The films revealed high stability against water because of the excellent hydrophobic properties of PS. These emitting films were made into bands of various shapes, in which their well-flexible nature endowed the films with important applications. © 2023 The Royal Society of Chemistry.

关键词： Nanocrystals

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Utilization of CoFe2O4 nanoparticles to harness their electrochemical characteristics

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Nanomaterials and Energy 2024年第4期13卷 1-9页

作者： Kumar, Yogendra Pandey, Avinash Kumar Singh, Pragya Singh, Man Vir Raza, Waseem Hasan, Imran Department of Chemistry Institute of Applied Sciences & Humanities GLA University Mathura India Department of Chemistry Dev Bhoomi Uttarakhand University Dehradun India School of Material Science & Engineering Yeungnam University Gyeongsan Korea Republic of Department of Chemistry College of Science King Saud University Riyadh Saudi Arabia

The cobalt ferrite nanoparticles were synthesized using cobalt nitrate and ferric nitrate as precursor materials by combustion method using sucrose as a fuel. The cobalt ferrite nanoparticle materials were analyzed through field emission scanning electron microscope (FESEM) and X-ray diffraction (XRD) spectroscopy. FESEM and XRD techniques reveal that the cobalt ferrite particles are in the crystallite nano range, with their size ranging from 10 to 14 nm. The cobalt ferrite nanoparticle materials have been thermally analyzed by Mettler Toledo and thermogravimetric analysis/differential scanning calorimetry 3+ model;the nanoparticles were found thermally stable at 4508C temperature. Galvanstate 101 (the Netherlands) with three-electrodes system and AUTOLAB potentiostats were used to test electrochemical properties during the synthesis of cobalt ferrite nanoparticle materials;the oxidation and reduction potentials were found to be 384 mV and 186 mV, respectively. Oxidation and reduction currents were found at 35.9 μA and -25.5 μA, respectively. The electrode was made from cobalt ferrite nanoparticles for application, and their properties were excellent. © 2024 ICE Publishing. All rights reserved.

关键词： Field emission microscopes

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Boosting solar hydrogen production via electrostatic interaction mediated ***-TiO_(2−x)biohybrid system

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Nano Research 2024年第6期17卷 5390-5398页

作者： Xingxing Lv Weicheng Huang Ya Gao Rui Chen Xiaowei Chen Danqing Liu Ling Weng Liangcan He Shaoqin Liu School of Material Science and Chemical Engineering Harbin University of Science and TechnologyHarbin 150040China School of Medicine and Health and Key Laboratory of Micro-systems and Micro-structures Manufacturing of Ministry of EducationHarbin Institute of TechnologyHarbin 150001China Department of Physics School of ScienceJimei UniversityXiamen 361021China Zhengzhou Research Institute Harbin Institute of TechnologyZhengzhou 450046China

Hydrogen is garnering growing attention as a green energy source with zero carbon ***,most hydrogen production technologies still rely on the consumption of fossil fuels and are therefore *** has driven the search for more environmentally friendly methods of hydrogen *** this work,we present an innovative approach to enhance hydrogen generation via electrostatic interaction in the Escherichia coli and defective titanium dioxide(TiO_(2−x))*** method involves narrowing the forbidden bandwidth of TiO2 while introducing defect bands into its conduction band to facilitate visible light absorption and efficient charge *** biohybrid system,consisting of *** and TiO_(2−x),demonstrates a remarkable capability to produce 1.25 mmol of hydrogen within a 3-h timeframe under visible light *** accomplishment signifies a 3.31-fold rise in hydrogen production in comparison to ***,signifying a substantial enhancement in hydrogen production ***,we delve into the alterations in biological metabolites associated with hydrogen production and the changes in electron transfer in different biohybrid *** provides valuable insights into the understanding of the intrinsic mechanisms that drive the *** work introduces a novel and promising avenue for achieving this exciting goal.

关键词： Escherichia coli TiO_(2−x)nanoparticles biohybrid system hydrogen production

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