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Ultraviolet and Thermal Dual-Curing Assisted Extrusion-Based Additive Manufacturing of Lunar Regolith Simulant for In-Site Construction on the Moon

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SSRN 2023年

作者： Cui, Qianshun Wang, Tongcai Gu, Guangshuai Zhang, Rihan Zhao, Tingting Huang, Zhifeng Wang, Gong Chen, Fei Technology and Engineering Center of Space Utilization Chinese Academy of Sciences Beijing100094 China University of Chinese Academy of Sciences Beijing100049 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China

The establishment of a lunar base is crucial for lunar studies, resource extraction, and advancement in deep space exploration. Considering the limitations of rocket capacity and Earth-Moon transportation costs, lunar regolith is regarded as the most practical material for lunar base construction. Consequently, the in-situ additive manufacturing technology for simulated lunar regolith has been widely studied in recent years. This paper proposes a novel additive manufacturing approach for lunar regolith simulants. The simulants and several resins were mixed into a high-solid-loading paste, which was suitable for extrusion-based additive manufacturing process. To fully leverage the lunar environment, the feasibility of the ultraviolet (UV) and thermal curing of the resins was first verified, which was followed by the validation of the lunar regolith paste with the solid content of 86 wt.%. After the characterization of the ultraviolet and heat curing properties, the paste was further 3D printed via the extrusion-based device. The extruded paste underwent preliminary curing in a UV environment and was then heated to approximate the daytime lunar conditions, achieving complete curing of the printed component. The cured parts exhibited a compressive strength of 9.83 ± 1.07 MPa, meeting the requirements for infrastructure construction in the low-gravity lunar environment. This work offers significant implications for future in-situ construction on the Moon using extrusion-based lunar regolith additive manufacturing. © 2023, The Authors. All rights reserved.

关键词： 3D printing

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Printed aerogels: Chemistry, processing, and applications

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Chemical Society Reviews 2021年第6期50卷 3842-3888页

作者： Feng, Junzong Su, Bao-Lian Xia, Hesheng Zhao, Shanyu Gao, Chao Wang, Lukai Ogbeide, Osarenkhoe Feng, Jian Hasan, Tawfique Cambridge Graphene Centre University of Cambridge CambridgeCB3 0FA United Kingdom Science and Technology on Advanced Ceramic Fibers and Composites Laboratory National University of Defense Technology Changsha Hunan410073 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Loushi Road 122 Wuhan430070 China Laboratory of Inorganic Materials Chemistry Department of Chemistry University of Namur 61 rue de Bruxelles NamurB-5000 Belgium State Key Laboratory of Polymer Materials Engineering Polymer Research Institute Sichuan University Chengdu610065 China Laboratory for Building Energy Materials and Components Swiss Federal Laboratories for Materials Science and Technology EmpaCH-8600 Cyprus MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University 38 Zheda Road Hangzhou310027 China

As an extraordinarily lightweight and porous functional nanomaterial family, aerogels have attracted considerable interest in academia and industry in recent decades. Despite the application scopes, the modest mechanical durability of aerogels makes their processing and operation challenging, in particular, for situations demanding intricate physical structures. "Bottom-up"additive manufacturing technology has the potential to address this drawback. Indeed, since the first report of 3D printed aerogels in 2015, a new interdisciplinary research area combining aerogel and printing technology has emerged to push the boundaries of structure and performance, further broadening their application scope. This review summarizes the state-of-the-art of printed aerogels and presents a comprehensive view of their developments in the past 5 years, and highlights the key near- and mid-term challenges. This journal is © The Royal Society of Chemistry.

关键词： Aerogels

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The Effect of Pre-Strain on Textures, Nano-Twins and Mechanical Properties of a Novel Nickel-Based Superalloy Gh4251 with Low Stacking Fault Energy

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SSRN 2024年

作者： Dong, Jinxin Yu, Hongyao Cao, Rui Wang, Xingmao Wang, Jue Bi, Zhongnan State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals China School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China Beijing Key Laboratory of Advanced High Temperature Materials Central Iron and Steel Research Institute Beijing100081 China Gaona Aero Material Co. Ltd. Beijing100081 China School of Materials Science and Engineering Nanjing Institute of Technology Nanjing211167 China

The strength and plasticity of a novel polycrystalline low stacking fault energy precipitation-strengthened Nickel-based superalloy at 750°C can be enhanced by appropriate cold rolling pre-deformation. The findings indicate that such pre-deformation leads to the emergence of microscopic substructures, including dislocations, anti-phase boundaries (APBs), stacking faults, and Lomer-Cottrell Locks (L-C locks). The presence of these substructures was observed to increase with the degree of pre-deformation. At a pre-deformation level of 15%, only a few deformation twins were detected near the grain boundaries, with their occurrence rising further in specimens subjected to 25% pre-deformation. Additionally, the formation of nano-twins showed a strong correlation with the intensification of Copper Twin (CuT) and Brass-type textures. Notably, the yield strength of the superalloy at 750°C increased with the augmentation of cold rolling pre-deformation within the range of 5% to 15%. Interestingly, the yield strength of the specimen with 25% pre-deformation was slightly lower than that of the 15% pre-deformation specimen but higher than that of specimens without pre-deformation and those with 5% pre-deformation. Tensile strength continued to rise with increased cold rolling pre-deformation. The specimen with 15% pre-deformation displayed the lowest plasticity. Attributed to factors such as low recovery and recrystallization activation energy, high-density nano-twins, grain refinement, and conducive crystallographic orientation for nano-twin mechanism activation caused by cold rolling pre-deformation, the specimen with 25% pre-deformation exhibited relatively high ductility at 750°C. This study comprehensively explores the relationship between pre-cold rolling deformation, microstructure, texture, and mechanical properties, indicating that cold rolling pre-deformation holds promise for enhancing both the strength and plasticity of Nickel-based superalloys. © 2024, The Authors.

关键词： Textures

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Solar-driven H_(2)O_(2)production by S-scheme heterojunction photocatalyst

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Chinese Journal of Catalysis 2025年第5期72卷 24-47页

作者： Han Li Wang Wang Kaiqiang Xu Bei Cheng Jingsan Xu Shaowen Cao School of Automotive Materials Hubei University of Automotive TechnologyShiyan 442020HubeiChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Hubei Technology Innovation Center for Advanced Composites Wuhan University of TechnologyWuhan 430070HubeiChina School of Chemical and Environmental Engineering Shanghai Institute of TechnologyShanghai 201418China School of Chemistry and Physics&Centre for Materials Science Queensland University of TechnologyBrisbaneQueensland 4001Australia

Hydrogen peroxide(H_(2)O_(2)),as an essential and green chemical,is extensively used in energy and environmental ***,the production of H_(2)O_(2)primarily relies on the anthraquinone method,which is an energy-intensive method involving multi-step reactions,producing harmful by-product ***-driven H_(2)O_(2)production,an alternative route for H_(2)O_(2)generation,is a green and sustainable technology since it only utilizes water and oxygen as ***,the rapid recombination of charge carriers as well as insufficient redox capability limit the photocatalytic H_(2)O_(2)production *** step-scheme(S-scheme)heterojunction photocatalysts has been regarded as an effective strategy to address these drawbacks because it not only achieves spatially separated charge carriers,but also preserves redox capability of the photocatalytic *** paper covers the recent advances of S-scheme heterojunction photocatalysts for H_(2)O_(2)production in terms of basic principles,characterization techniques,and preparation ***,the mechanism and advantages of S-scheme heterojunction for photocatalytic H_(2)O_(2)generation are systematically *** recent S-scheme heterojunction designs,including inorganic-organic heterojunction,inorganic-inorganic heterojunction,and organic-organic heterojunction,are ***,the challenges and research directions of S-scheme photocatalysts for H_(2)O_(2)generation are presented.

关键词： Step-scheme heterojunction H_(2)O_(2)photosynthesis Charge migration mechanism Solar conversion

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Nir-Response Amorphous Feooh Anchored Bio2-X for Chlorophenols Photodegradation Via Molecular Oxygen Activation

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SSRN 2023年

作者： Huang, Shengnan Chen, Fengxi Zhu, Deyu Li, Jun Liu, Yunling Chen, Rong State Key Laboratory of New Textile Materials & Advanced Processing Technologies Wuhan Textile University Hubei Wuhan430200 China School of Chemistry and Environmental Engineering Wuhan Institute of Technology Donghu New & High Technology Development Zone Hubei Wuhan430205 China Henan Institute of Advanced Technology Zhengzhou University Zhengzhou450002 China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin University Jilin130012 China

Chlorophenols (CPs) are universal and toxic pollutants in nature, as they have been widely detected in surface water, groundwater, sediment, ambient air, soil, and the human body. In this work, novel FeOOH@BiO2-x binary heterostructure composites with UV-Vis-NIR full-spectrum response were successfully constructed by anchoring highly dispersed amorphous FeOOH on BiO2-x nanosheets. A series characterization indicated the binary components were successfully obtained. The FeOOH@BiO2-x photocatalysts exhibited highly enhanced photocatalytic activity for the degradation of chlorophenols under UV-Vis-NIR full-spectrum irradiation. The amorphous FeOOH could effectively broaden the light response range, modulate the energy band structure and promote the separation and transfer of photogenerated electron-holes pairs, thus boosting the activation of molecular oxygen to generate •O2-. Furthermore, FeOOH@BiO2-x maintained excellent photocatalytic performance upon real solar light of varied irradiance for consecutive 7 days, indicative of great potential towards phenolic pollutants degradation in water. The redox couples of Fe3+/Fe2+ and Bi(3+x)+/Bi3+ also accelerate the efficient generation of reactive oxygen species over FeOOH@BiO2-x with improved durability. This work not only contributes to the design of full-spectrum responsive photocatalysts, but also provides a rational strategy for molecular oxygen activation towards the elimination of emerging contaminants. © 2023, The Authors. All rights reserved.

关键词： Bismuth compounds

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Zn0.1cd0.9s/Nis Heterojunction Photocatalysts for Enhanced H2 Production and Glucose Conversion

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SSRN 2023年

作者： Li, Yu Shen, Yuan-Sheng Bai, Fang-Yuan Wei, Ke Wang, Xin-Ling Chen, Jun Jiang, Ze-Yu Liu, Jing Hu, Zhi-Yi Chen, Li-Hua Su, Bao-Lian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Hubei Wuhan430070 China Wuhan University of Technology 122 Luoshi Road Hubei Wuhan430070 China University of Namur 61 rue de Bruxelles Namur5000 Belgium

The well-designed photocatalyst is a reasonable strategy to improve the photocatalytic performance and realize the photocatalytic H2-production and biomass conversion. In this work, the Zn0.1Cd0.9S/ NiS (SNS) composite was successfully prepared by chemical bath deposition of NiS nanoparticles on Zn0.1Cd0.9S (ZCS) nanorods surface. Our results show that the synergistic effect of NiS and ZCS largely improves the absorption and utilization of light, and the separation of photogenerated carriers because the one-dimensional nanorods is conducive to the transmission of photogenerated carriers. The optimized catalyst (SNS20) has the highest H2-production rate (12.77 mmol·g-1·h-1), which is 6.7 times that of pure ZCS nanorods. The glucose conversion increases from 25.7% to 49.9% and lactic acid selectivity reaches 95%. This work provides a reasonable strategy for designing heterojuction photocatalyst to improve the performance for the synergy of photocatalytic H2-production and biomass conversion. © 2023, The Authors. All rights reserved.

关键词： Nanorods

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Amino-Functionalized and Na+ Pre-Intercalated Three Dimensional Ti3c2tx Film Aerogel with Excellent Electrochemical Performances for Supercapacitor

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SSRN 2024年

作者： Guo, Xiaohui Jin, Xinhui Mo, Dejie Feng, Lirong Wang, Dong Su, Baolian Key Lab of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education The College of Chemistry and Materials Science Northwest University Xi’an710069 China Department of inorganic chemistry University of Namur 61 rue de Bruxelles NamurB-5000 Belgium Xinjiang University China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing China

Precise modulation of the pore structure and modification of the surface groups (-NH2) of MXene aerogels by the solid foaming method in combination with Na+ pre-intercalation can significantly increase the layer spacing and change the electronic structure of MXene, thereby significantly optimizing its electrochemical performance. The three dimensional (3D) network structure provides numerous active sites on the surface of MXene and provides more ion transfer pathways, and the large layer spacing allows electrolyte ions fast transport, and the surface groups provide more active sites for the pseudocapacitive reaction. As a result, the prepared Na-Ti3C2Tx film aerogel delivers a high mass specific capacity of 560 F g-1 and excellent cycling performance of 94.5% capacity retention after 12,000 cycles in 0.5 M H2SO4. In addition, the flexible all-solid-state supercapacitor (ASC) composed of MXene film electrodes has excellent specific capacitance ~ 277 F g-1 and high energy density ~ 52.8 Wh kg-1 at 1600 W kg-1. Therefore, this work not only proposes a feasible synthetic method that can precisely regulate the pore structure and surface features of film aerogels, but also demonstrates the broad application prospects of aerogel materials in wearable power devices. © 2024, The Authors. All rights reserved.

关键词： Supercapacitor

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Proportion Dependent Osteogenic Activity of Electrospun Nano-Hydroxyapatite/Polylactic Acid Fiber Membrane in Vitro and in Vivo

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SSRN 2022年

作者： Liang, Bangbang Feng, Tianyi Yuan, Xiaoting Zhao, Kang Li, Chengyu Han, Yingchao State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Biomedical Materials and Engineering Research Center of Hubei Province Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan528200 China

Herein, nano-hydroxyapatite(nHAP) of 0-20wt% was incorporated in polylactic acid(PLA) to construct nHAP/PLA electrospun fiber membrane, and the effects of nHAP on the physicochemical properties and osteogenic activities were investigated, aiming to optimize the proportion of nHAP/PLA for a better bone repair effect. Results showed that nHAP was approximately evenly incorporated in PLA fiber and increased the fiber surface hydrophilicity. The composite membrane displayed a nHAP content-dependent mechanical property with the maximum enhancements of 29.1%, 113.2% and 45.8% in tensile strength, breaking elongation and Young’s modulus, respectively. Biological experiments demonstrated the nHAP content-dependent osteogenic activity of nHAP/PLA fiber membrane. The nHAP of 6-10wt% in membrane presented a significant promotion effect on the proliferation and differentiation of BMSCs. In vivo experiments of stacked implantation of membrane displayed the multilayer growth in pure PLA group due to the hydrophobicity of PLA resulting interlayer space and single-layer growth in nHAP/PLA group because of the hydrophilicity improved adhesion of layers. However, the 6-10wt%nHAP/PLA could promote cell recruitment and infiltration, and increase the osteogenesis with enhancements of 41% in BV/TV and 37% in BMD, respectively. Our study provides helpful supports for the preparation of composite electrospun membrane with improved osteogenic activity by optimizing the organic-inorganic proportion. © 2022, The Authors. All rights reserved.

关键词： Nanocomposites

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Effect of Magnetic Field Annealing on the Soft Magnetic Properties of Cofesib Ribbon and its Fluxgate Performance

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SSRN 2023年

作者： Xu, Jiahui Kang, Shujie Wang, Jian Xu, Feng Shi, Chao Zhang, Kewei Wang, Jiafu Chen, Zhengxiang He, Jun Sun, Zhigang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China School of Materials Science and Engineering Taiyuan University of Science and Technology Taiyuan030024 China China Shipbuilding Industry Corporation 710th Research Institute Yichang443003 China Division of Functional Material Research Central Iron and Steel Research Institute Beijing100081 China

As a key part of fluxgate, the properties of magnetic core determine the performance of fluxgate sensor. We studied the effects of zero magnetic field annealing (ZFA) and longitudinal magnetic field annealing (LFA) on soft magnetic properties, magnetic anisotropy and magnetic domain structure of the Co70Fe5Si15B10 amorphous ribbon and its fluxgate sensor performance. It is found that LFA can effectively modulate the magnetic domain from irregular shape and size to wide regular strip domains. As a result, pinning effect, magnetic anisotropy and coercivity decrease, while the initial permeability increases. And finally, the sensitivity of the fluxgate become higher, and noise become less. The results show that the optimal soft magnetic properties of the ribbons are obtained after LFA at 440 ℃, with the initial permeability of 21020 and the coercivity of 0.2 A/m. We applied a square wave excitation signal of size 30 mA and frequency 2.4 kHz to test the performance of the fluxgates. It is found that the flux gate sensitivity increases from the original 36.54 to 41.82 mV/μT after magnetic field annealing treatment, and the peak-to-peak noise (Noisep-p) value at 10Hz bandwidth in 250 s decreases from the original 5.22 to 2.14 nT. The results show that the LFA treatment of the core has a significant effect on its magnetic properties and fluxgate performance enhancement, and these results have good implications for the construction of high-performance fluxgate. © 2023, The Authors. All rights reserved.

关键词： Magnetic anisotropy

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Effects of the Γ′ Precipitation Phase on the Hot Corrosion of In738lc Alloy Fabricated Through Selective Laser Melting

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SSRN 2023年

作者： Hu, Yong Chu, Cheng Hu, Yongqi Liu, Bo Xu, Jiayu Ding, Yutian Zhang, Dong State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology Gansu Lanzhou730050 China School of Material Science and Engineering Lanzhou University of Technology Gansu Lanzhou730050 China State Key Laboratory of Nickel and Cobalt Resources Comprehensive Utilization Jinchuan Group Co. Ltd. Gansu Jinchang737100 China

This study investigates the impact of γ´ precipitates on the hot corrosion properties of the selective laser melting IN738LC alloy, which subjected to sub-solution treatment by water (WC), air (AC), and furnace cooling (FC) mode. The results demonstrate there is significant anisotropy in hot corrosion performance, and the XY plane is superior corrosion resistant than the XZ plane. The small grain size and area fraction of γ´ precipitation promote the oxide film and dense Al2O3 internal oxide layer formation, enhancing hot corrosion resistance. The hot corrosion resistance performance on the samples followed the order of FC > WC > AC. © 2023, The Authors. All rights reserved.

关键词： Oxide films

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