检索结果-内蒙古大学图书馆

Rational design of FeS_(2)microspheres as high-performance catalyst for electrooxidation of hydrazine

Journal of materials science & Technology 2022年第15期110卷 161-166页

作者： Jie Sun Chuangwei Liu Wenhan Kong Jie Liu Liangyu Ma Song Li Yuanhong Xu Institute of Biomedical Engineering College of Life SciencesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China Department of Energy Conversion and Storage Technical University of Denmark2800 Kgs.LyngbyDenmark Key Lab for Anisotropy and Texture of Materials School of Materials Science and Engineering Northeastern UniversityShenyang 110819China

Inspired by the relatively recognized performance of transition metal sulfides in the oxidation of hydrazine,the catalytic properties of FeS_(2) and Fe_(3)S_(4) are compared via the density functional theory *** to the different coordination numbers of iron-sulfur,the free energies of the dehydrogenation steps on FeS_(2) are far less than those on Fe_(3)S_(4),which led to the much better catalytic performance of FeS_(2).Accordingly,FeS_(2) microspheres are rationally proposed as a more efficient electrocatalyst for hydrazine oxidation,which is then prepared by a facile one-step hydrothermal *** FeS_(2)microspheres show great activity for hydrazine oxidation with an onset oxidation potential of 0.22 V *** hydrogen electrode,and a peak current density of 16 m A cm^(-2).Meanwhile,stability and high faradaic efficiency(3.5e-/N_(2)H_(4))is obtained for hydrazine oxidation to N_(2).

关键词： Rational design Hydrazine electrooxidation FeS_(2)microspheres Electrochemistry

来源：评论

学校读者我要写书评

暂无评论

Muscle-inspired soft robots based on bilateral dielectric elastomer actuators

引用

Microsystems & Nanoengineering 2023年第5期9卷 245-254页

作者： Yale Yang Dengfeng Li Yanhua Sun Mengge Wu Jingyou Su Ying Li Xinge Yu Lu Li Junsheng Yu State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of China(UESTC)ChengduPR China Chongqing Key Laboratory of Materials Surface&Interface Science Chongqing Co-Innovation Center for Micro/Nano Optoelectronic Materials and DevicesMicro/Nano Optoelectronic Materials and Devices International Science and Technology Cooperation Base of ChinaSchool of Materials Science and EngineeringChongqing University of Arts and SciencesChongqingPR China Hong Kong Centre for Cerebro-Cardiovascular Health Engineering(COCHE) Hong KongSARChina Department of Biomedical Engineering City University of Hong KongHong KongSARChina

Muscle groups perform their functions in the human body via bilateral muscle actuation,which brings bionic inspiration to artificial robot *** soft robotic systems with artificial muscles and multiple control dimensions could be an effective means to develop highly controllable soft ***,we report a bilateral actuator with a bilateral deformation function similar to that of a muscle group that can be used for soft *** construct this bilateral actuator,a low-cost VHB 4910 dielectric elastomer was selected as the artificial muscle,and polymer films manufactured with specific shapes served as the actuator *** end-to-end connecting these bilateral actuators,a gear-shaped 3D soft robot with diverse motion capabilities could be developed,benefiting from adjustable actuation *** on the ground with all feet on the ground,a crawling soft robot with dexterous movement along multiple directions was ***,the directional steering was instantaneous and *** two feet standing on the ground,it also acted as a rolling soft robot that can achieve bidirectional rolling motion and climbing motion on a 2°***,inspired by the orbicularis oris muscle in the mouth,a mouthlike soft robot that could bite and grab objects 5.3 times of its body weight was *** bidirectional function of a single actuator and the various combination modes among multiple actuators together allow the soft robots to exhibit diverse functionalities and flexibility,which provides a very valuable reference for the design of highly controllable soft robots.

关键词： robot artificial dielectric

来源：评论

学校读者我要写书评

暂无评论

Recycling of Magnesium Alloy Using the Gravity-Driven Multiple-Effect Thermal System (G-METS)

Recycling of Magnesium Alloy Using the Gravity-Driven Multip...

引用

Magnesium Technology Symposium held at the TMS Annual Meeting and Exhibition, 2024

作者： Mc Arthur Sehar, Daniel Telgerafchi, Armaghan Ehsani Iurkovskyi, Artem Opoku, Emmanuel Powell, Adam Materials Science and Engineering Program Department of Mechanical Engineering Worcester Polytechnic Institute WorcesterMA United States Department of Mechanical Engineering Worcester Polytechnic Institute WorcesterMA United States

ISBN: (纸本)9783031502392

MagnesiumMagnesium metal has been significantly used in commercial applications from automobiles to aluminum alloys to defense weaponry. The surge in structural usage of magnesium over the past years has been due to high strength and excellent stiffness-to-weight ratio. RecyclingRecycling magnesium scrap is a crucial aspect of the sustainability of the economy and environmental welfare. G-METS is an advanced distillationDistillation system used in the conversion of low-grade magnesium scrap into high-purityHigh-purity magnesium metal. This multiple-effect system uses the weight of magnesiumMagnesium as a compressor, to build pressure differences between each effect of the condenser-evaporator, modifying boiling points, and enabling transfer of vaporization enthalpy. This system is exceptionally efficient compared to the energy-intensive conventional distillationDistillation technique. This study compares experiments and models of one- and two-effect distillers. © The Minerals, Metals & materials Society 2024.

关键词： Magnesium alloys

来源：评论

学校读者我要写书评

暂无评论

NaF assisted preparation and the improved corrosion resistance of high content ZnO doped plasma electrolytic oxidation coating on AZ31B alloy

引用

Journal of Magnesium and Alloys 2024年第9期12卷 3602-3615页

作者： Chao Yang Jian Huang Suihan Cui Ricky Fu Liyuan Sheng Daokui Xu Xiubo Tian Yufeng Zheng Paul K.Chu Zhongzhen Wu School of Advanced Materials Peking University Shenzhen Graduate SchoolShenzhen 518055China Department of Physics Department of Materials Science&Engineeringand Department of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong Kong 999077China Shenzhen Institute Peking UniversityShenzhen 518057China PKU-HKUST ShenZhen-HongKong Institution Shenzhen 518057China Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

In the present research,the NaF assisted plasma electrolytic oxidation(PEO)is designed to fabricate the high-content ZnO nanoparti-cles doped coating on AZ31B *** microstructure,phase constituents and corrosion behavior of the PEO coatings are investigated *** results reveal that the introduction of NaF promotes the formation of MgF2 nanophases in the passivation layer on Mg alloy,decreasing the breakdown voltage and discharge *** a result,the continuous arcing caused by high discharge voltage is *** the increasing of NaF content,the Zn content in the PEO coating is enhanced and the pore size in the coating is decreased *** to the high-content ZnO doping,the PEO coating protected AZ31B alloy demonstrates the better corrosion *** with the bare AZ31B alloy,the high-content ZnO doped PEO coated sample shows an increased corrosion potential from-1.465 V to-1.008 V,a decreased corrosion current density from 3.043×10^(-5) A·cm^(-2) to 3.960×10^(-8) A·cm^(-2) and an increased charge transfer resistance from 1.213×10^(2) ohm·cm^(2) to 2.598×10^(5) ohm·cm^(2).Besides,the high-content ZnO doped PEO coated sample also has the excellent corrosion resistance in salt solution,exhibiting no obvious corrosion after more than 2000 h neutral salt spraying and 28 days’immersion *** improved corrosion resistance can be ascribed to the relative uniform distribution of ZnO in PEO coating which can transform to Zn(OH)2 and form a continuous protective layer along the corrosion interface.

关键词： AZ31B alloy Plasma electrolytic oxidation(PEO) ZnO doping NaF Corrosion resistant

来源：评论

学校读者我要写书评

暂无评论

Inhibiting scar formation via wearable multilayer stacked electret patch:Self-creation of persistent and customizable DC electric field for fibrogenic activity restriction

引用

InfoMat 2024年第3期6卷 66-80页

作者： Sung-Won Kim Sumin Cho Donghan Lee Jiyu Hyun Sunmin Jang Inwoo Seo Hyun Su Park Hee Jae Hwang Hyung-Seop Han Dae Hyeok Yang Heung Jae Chun Suk Ho Bhang Dongwhi Choi School of Chemical Engineering Sungkyunkwan UniversitySuwonRepublic of Korea Department of Mechanical Engineering(Integrated Engineering Program) Kyung Hee UniversityYonginGyeonggiRepublic of Korea Biomaterials Research Center Biomedical Research DivisionKorea Institute of Science and Technology(KIST)SeoulRepublic of Korea Department of Medical Life Sciences College of MedicineInstitute of Cell and Tissue EngineeringThe Catholic University of KoreaSeoulRepublic of Korea

Electrical stimulation has recently received attention as noninvasive treatment in skin wound healing with its outstanding biological property for clinical ***,the complexity of equipment for applying appropriate electrical stimulation remains an ongoing ***,we proposed a strategy for skin scar inhibition by providing electrical stimulation via a multilayer stacked electret(MS-electret),which can generate direct current(DC)electric field(EF)without any power supply *** addition,the MS-electret can easily control the intensity of EFs by simply stacking electret layers and maintain stable EF with the surface potential of 3400 V over 5 days owing to the injected charges on the electret *** confirmed inhibition of type 1 collagen andα-SMA expression of human dermal fibroblasts(hDFs)by 90%and 44%in vitro,indicating that the transition of hDFs to myofibroblasts was restricted by applying stable electrical *** further revealed a 20%significant decrease in the ratio of myofibroblasts caused by the MS-electret in *** findings present that the MS-electret is an outstanding candidate for effective skin scar inhibition with a battery-free,physiological electrical microenvironment,and noninvasive treatment that allows it to prevent external infection.

关键词： DC electric field dermal fibroblasts electret scar formation restriction self-creation of electrical stimulation

来源：评论

学校读者我要写书评

暂无评论

Multi-layer hierarchical cellulose nanofibers/carbon nanotubes/vinasse activated carbon composite materials for supercapacitors and electromagnetic interference shielding

引用

Nano Research 2024年第3期17卷 904-912页

作者： Tianxu Wang Chuanyin Xiong Yongkang Zhang Bo Wang Qing Xiong Mengjie Zhao Yonghao Ni College of Bioresources Chemical&Materials Engineering Shaanxi University of Science and TechnologyXi’an 710021China Department of Chemical and biomedical Engineering The University of MaineOronoME 04469USA University of New Brunswick Limerick Pulp&Paper CtrFrederictonNB E3B 5A3Canada

Developing porous self-supporting electrodes with excellent conductivity,good mechanical properties,and high electrochemical activity is crucial for constructing electrode materials with lightweight,ultra-thin,flexible,and high capacitance *** this work,we prepared a cellulose nanofibers(CNFs)/carbon nanotubes(CNTs)/vinasse activated carbon(VAC)(CCV)composite material with a multi-layer hierarchical conductive structure through simple vacuum filtration and *** this composite material,the self-assembly of CNF provides the main skeleton structure of a multi-layer hierarchical *** provides a fast path for the rapid transfer of electrons and is beneficial for the loss of electromagnetic *** provides sufficient double layer *** synergistic effect of the above three endows CCV composite materials with excellent energy storage performance and electromagnetic interference(EMI)shielding *** addition,we endowed the CCV composite with a certain shape and performance by introducing a vitrimer polymer with a dynamic cross-linked network *** summary,thanks to the synergistic effect of various components in the multi-layer hierarchical structure,CCV composite materials exhibit excellent integration performance,especially stable energy storage performance and EMI shielding *** significant properties make CCV composite materials have great application prospects in the fields of energy storage and intelligent EMI shielding.

关键词： self-supporting electrodes multi-layer hierarchical structure supercapacitors electromagnetic interference shielding

来源：评论

学校读者我要写书评

暂无评论

Bioinspired MXene-Based Soft Actuators Exhibiting Angle-Independent Structural Color

引用

Nano-Micro Letters 2023年第1期15卷 1-13页

作者： Pan Xue Yuanhao Chen Yiyi Xu Cristian Valenzuela Xuan Zhang Hari Krishna Bisoyi Xiao Yang Ling Wang Xinhua Xu Quan Li School of Materials Science and Engineering Tianjin UniversityTianjin 300350People’s Republic of China Institute of Advanced Materials School of Chemistry and Chemical EngineeringTech Key Laboratory for Biomedical ResearchSoutheast Universityand Jiangsu Province HiNanjing 211189People’s Republic of China Advanced Materials and Liquid Crystal Institute and Chemical Physics Interdisciplinary Program Kent State UniversityKentOH 44242USA

In nature,many living organisms exhibiting unique structural coloration and soft-bodied actuation have inspired scientists to develop advanced structural colored soft actuators toward biomimetic soft ***,it is challenging to simultaneously biomimic the angle-independent structural color and shape-morphing capabilities found in the plum-throated cotinga flying ***,we report biomimetic MXene-based soft actuators with angle-independent structural color that are fabricated through controlled self-assembly of colloidal SiO_(2) nanoparticles onto highly aligned MXene films followed by vacuum-assisted infiltration of polyvinylidene fluoride into the *** resulting soft actuators are found to exhibit brilliant,angle-independent structural color,as well as ultrafast actuation and recovery speeds(a maximum curvature of 0.52 mm−1 can be achieved within 1.16 s,and a recovery time of~0.24 s)in response to acetone *** proof-of-concept illustrations,structural colored soft actuators are applied to demonstrate a blue gripper-like bird’s claw that can capture the target,artificial green tendrils that can twine around tree branches,and an artificial multicolored butterfly that can flutter its wings upon cyclic exposure to acetone *** strategy is expected to offer new insights into the development of biomimetic multifunctional soft actuators for somatosensory soft robotics and next-generation intelligent machines.

关键词： Bioinspired soft actuator Angle-independent structural color MXene liquid crystals Soft robotics

来源：评论

学校读者我要写书评

暂无评论

Assembly of exfoliated α-zirconium phosphate nanosheets:Mechanisms and versatile applications

Aggregate

引用

Aggregate 2022年第4期3卷 41-60页

作者： Hao Ding Abbas Ahmed Kuangyu Shen Luyi Sun Polymer Program Institute of Materials ScienceUniversity of ConnecticutStorrsConnecticutUSA Department of Chemical and Biomolecular Engineering University of ConnecticutStorrsConnecticutUSA Department of Biomedical Engineering University of ConnecticutStorrsConnecticutUSA

α-Zirconium phosphate(Zr(HPO_(4))_(2)⋅H_(2)O,α-ZrP)is an inorganic layered *** the first report of crystallineα-ZrP in 1964,thanks to its simple synthesis and unique physiochemical properties,α-ZrP has found widespread application in many fields including mechanical reinforcing,barrier improvement,flame retardancy,anticorrosion,catalysis,environment,energy,and *** of the ease of exfoliation ofα-ZrP to obtain single-layer nanosheets,as well as its rich surface chemistry thanks to the high density of orderly arranged surface acidic hydroxyl groups,α-ZrP single-layer nanosheets are ideal building blocks for self-assembly or assembly with other *** assembly ofα-ZrP nanosheets could form a randomly dispersed structure(isotropic),roughly ordered structure(nematic),or highly ordered structure(smectic)within liquid colloids or solid hybrids(including hydrogels).Thanks to the combination of the unique structures and the novel functions of the components,the assembled materials have found a wide verity of applications due to their excellent *** this article,the methods to synthesizeα-ZrP,the approaches and mechanisms to exfoliateα-ZrP,and the strategies to assembleα-ZrP nanosheets to form various structures,as well as the applications of the assembled materials are *** emerging prospects ofα-ZrP nanosheets as a key material in next-generation functional applications are envisioned.

关键词： application assembly exfoliation nanosheets α-zirconium phosphate

来源：评论

学校读者我要写书评

暂无评论

Payload-free protein nanoparticles target inflamed colons to restore intestinal barrier integrity for effectively treating inflammatory bowel diseases

Aggregate

引用

Aggregate 2024年第4期5卷 113-125页

作者： Mei Yang Honglan Shen Suting Zhong Zongpu Xu Xiangyu Liu Weicheng Wu Chuanbin Mao Mingying Yang Institute of Applied Bioresource Research College of Animal ScienceZhejiang UniversityHangzhouChina School of Materials Science and Engineering Zhejiang UniversityHangzhouChina Food Science Institute Zhejiang Academy of Agricultural SciencesHangzhouChina Department of Biomedical Engineering The Chinese University of Hong KongHong Kong SARChina

Anti-inflammatory compounds,delivered as a payload to the gastrointestinal tract(GIT)by carriers,still cannot treat inflammatory bowel diseases without avoid-ing side ***,we developed payload-free protein nanoparticles(PNPs)that crossed GIT to retain in the colon and treat colitis by restoring intestinal bar-rier integrity by modulating gut microbiome and ***,PNPs,orally administered to mice with acute colitis,reached the colon within three ***,PNPs improve gut microbiota dysbiosis to reverse metabolism bal-ance,suppressing the expression of tumor-necrosis factorαand toll-like receptor 4 that restores the intestinal barrier *** then ameliorated colon inflam-mation and attenuated gut microbiota dysbiosis by exerting probiotic effects on gut microbiota,treating colitis in a week more effectively than the clinically often used 5-aminosalicylic acid without causing undesired side *** PNPs repre-sent safe,sustainable,and cost-effective therapeutics for treating inflammatory and metabolic diseases by eliminating microbial and metabolomic imbalance.

关键词： gut metabolites gut microbiota inflammatory bowel diseases(IBDs) protein nanoparticles(PNPs)

来源：评论

学校读者我要写书评

暂无评论

Design of A Novel Statically Balanced Mechanism for End-effector-type Upper Limb Assistance

Design of A Novel Statically Balanced Mechanism for End-effe...

引用

2025 IEEE International Conference on Mechatronics, ICM 2025

作者： Meng, Qizhi Jiang, Ming Tang, Ruijie Kuo, Chin-Hsing Ceccarelli, Marco Takeda, Yukio Institute of Science Tokyo Department of Mechanical Engineering Tokyo Japan Tsinghua University Department of Mechanical Engineering Beijing China School of Mechanical Materials Mechatronic and Biomedical Engineering University of Wollongong Australia University of Rome Tor Vergata Department of Industrial Engineering Rome Italy

ISBN: (纸本)9798331533892

Partial loss of upper limb motor function is a typical sequela of stroke. To help such patients actively cope with daily challenges and improve their quality of life, limb functional assistances play important roles. To this end, this paper proposes a three-degree-of-freedom parallel mechanism, which can be used for human upper limb assistance. The base of the proposed mechanism is a circular track that can be attached to the waist of the human body. The mechanism consists of two chains containing parallelogram linkage, which presents good constraints for the mobile platform and facilitates the static balance design by adding springs, thereby providing reliable assistive functions and lightweight portability. The mobility of the proposed mechanism is analyzed via the screw theory, and it is verified that the mechanism generates the aimed movements. Then, the kinematic analysis of the mechanism is presented. Finally, the static balance design is carried out in detail, and the spring constants of the three added springs are calculated. The result shows that the mechanism can achieve perfect static balance. The proposed mechanism is expected to provide a potential candidate for assistive devices and be developed into a prototype providing upper limb assistance. © 2025 IEEE.

关键词： End effectors

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：