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Room-temperature Self-healing and Recyclable PDMS Elastomers with Superior Mechanical Properties for Triboelectric Nanogenerators

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Chinese Journal of Polymer Science 2024年第10期42卷 1566-1577页

作者： Shu-Juan Wang Lu Wang hong-zhe Su Zhi-Cheng Wu Qiao-Gen Zhang Wei Fan Xin-Li Jing School of Chemistry Joint Innovation Center of Thermal Protection Materials Xi'an Jiaotong University School of Electrical Engineering Xi'an Jiaotong University School of Textile Science and Engineering Xi'an Polytechnic University

Polydimethylsiloxane (PDMS) is an electron-withdrawing material that is widely used in triboelectric nanogenerators (TENGs). However, PDMS has poor mechanical properties after curing and is easily damaged when subjected to long-term workloads. Thus, the long-term stable operation of TENGs under mechanical deformation cannot be guaranteed. In this work, multiple hydrogen bonds and aromatic disulfide bonds were introduced into PDMS elastomers. These elastomers exhibited high toughness (a tensile strength of 1.91 MPa and an elongation at break of 340%), good recyclability, and room-temperature self-healing properties (healing efficiency of 96.4%in 24 h). Recyclable sandwich-like triboelectric nanogenerators with excellent electrical output performance (13.5 V) and room-temperature self-healing performance (24 h, 98% recovery of self-generating performance) were prepared by utilizing the hydrogen bonding between the PDMS elastomer and MXene. The work reported herein offers theoretical guidance and a compelling strategy for developing high-performance TENG negative friction layers.

关键词： Aromatic disulfide bonds Hydrogen bonds Polydimethylsiloxane Room temperature self-healing Triboelectric nanogenerator

Convenient room-temperature synthesis of sulfur and nitrogen co-doped NiCo-LDH coupled with CNTs on NiCo foam as battery-type electrode for high performance hybrid supercapacitor

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Rare Metals 2024年第9期43卷 4286-4301页

作者： Li Song Xiao-hong Zhong Fang-Lin Wang Zhi-Hui Huang zhe hong Yun-Fang Gao Hai-Dong Wang Jian-Wei Ren Sheng-Jie Peng Lei Li College of Biological Chemical Sciences and EngineeringJiaxing University College of Chemical Engineering Zhejiang University of Technology College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Research and Development Department Jiangxi Ganfeng Li Energy Technology Co.Ltd. Department of Mechanical Engineering Science University of Johannesburg

The convenient synthesis of the composite electrode with high supercapacitance performance plays an important role in practical application but is ***, the carbon nanotubes（CNTs） coupled with lowcrystalline sulfur and nitrogen co-doped Ni Co-LDH（denoted as SN-Ni Co-LDH） nanosheets array are grown on Ni Co foam（NCF） substrate by two convenient steps of metal induced self-assembly and corrosion engineering,which present the advantages of operating at roomtemperature and low preparation costs. Benefiting from the S–N co-doping and low-crystallinity of Ni Co-LDH, the prepared SN-Ni Co-LDH@CNTs@NCF electrode presents a topping charge capacity of 2470 C·g-1(4.94 C·cm-2) at 5 m A·cm-2. Furthermore, the fabricated asymmetry supercapacitor（ASC） achieves an extraordinary energy density of 77 Wh·kg-1(0.617 m Wh·cm-2) at a power density of 438 W·kg-1(3.5 m W·cm-2) and outstanding stability(91% capacity retention after 5000 cycles at20 m A·cm-2). Impressively, the structure evolution of Ni Co-LDH during the charge/discharge processes has been thoroughly elucidated by in-situ Raman spectra. Therefore,this work verifies a powerful strategy and practical value for preparing composite electrodes with high supercapacitance performance, and also provides guidance for the rational design of the smart electrodes.

关键词： Carbon nanotubes Convenient synthesis NiCo-LDH Sulfur and nitrogen co-doped Supercapacitor

Enhancement of beneficial microbiomes in plant-soil continuums through organic fertilization:Insights into the composition and multifunctionality

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Soil Ecology Letters 2024年第3期6卷 109-120页

作者： Wen-Jing Li Xin-Yuan Zhou Xin-Li An Li-Juan Li Chen-Shuo Lin Hua Li hong-zhe Li Key Lab of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products Institute of EnvironmentResourceSoil and FertilizersZhejiang Academy of Agricultural SciencesHangzhou 310021China

Soil microbiomes play a crucial role in maintaining ecological functions and are of great importance for soil *** of them could bring benefits to plants for growth *** numerous studies have focused on specific beneficial bacteria and their interactions with soils and plants,we still lack a comprehensive understanding of beneficial communities in plant–soil continuums and their responses to agricultural *** address this gap,we carried out a microcosm experiment using 16S rRNA amplicon sequencing to explore the effects of organic fertilization on beneficial communities in plant–soil continuums and assess their potential *** findings reveal that organic fertilization had a positive impact on the beneficial functionality of bacterial communities in plant–soil *** improvement was primarily attributed to the optimized soil physicochemical conditions resulting from organic ***,organic fertilization increased the complexity of bacterial co-occurrence networks in both soils and the *** taxa in the endosphere undergone a shift of functions toward pathogen suppression as the result of organic ***,this study revealed that plants exhibited a preference for internalizing beneficial bacteria over other type of *** also provided new insights for evaluating the multifunctionality of microbiomes,and found that the functionality of beneficial communities in plant–soil continuums is enhanced by organic *** these findings suggested that organic fertilization can be an effective strategy for maintaining plant and soil health.

关键词： plant–soil continuums beneficial bacteria agricultural activities multifunctionality endosphere

FINITE RANGE SET WITH TRUNCATED MULTIPLICITY FOR MEROMORPHIC FUNCTIONS ON SOME COMPLEX DISC

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数学杂志 2024年第5期44卷 383-396页

作者： WANG Yu-ting CAO hong-zhe Mathematics Department of Nanchang University Nanchang 330031China

In this paper,we consider the truncated multiplicity finite range set problem of meromorphic functions on some complex *** using the value distribution theory of meromorphic functions,we establish a second main theorem for meromorphic functions with finite growth index which share meromorphic functions(may not be small functions).As its application,we also extend the result of a finite range set with truncated multiplicity.

关键词： meromorphic functions finite growth index complex disc finite range set trun-cated multiplicity

Precisely manipulation of core composition of core-shell-type cobalt polyoxoniobates and proton conduction study

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Chinese Chemical Letters 2024年第1期35卷 510-513页

作者： zheng-Wei Guo Yi Chen zhe-hong Chen Xin-Xiong Li Shou-Tian zheng State Key Laboratory of Photocatalysis on Energy and Environment School of ChemistryFuzhou UniversityFuzhou 350108China

The development of core-shell nanoclusters with controllable composition is of utmost importance as the material properties depend on their constituent ***,precisely tuning their compositions at the atomic scale is not easily achieved because of the difficulty of using limited macroscopic synthetic methods for atomic-level *** this work,we report an interesting example of precisely regulating the core composition of an inorganic core-shell-type cobalt polyoxoniobate[Co_(26)Nb_(36)O_(140)]^(32−)by controlling reaction conditions,in which the inner Co-core composition could be tune while retaining the outer Nb-shell composition of resulting product,leading to a series of isostructural species with a general formula of{Co_(26-n)Nb_(36+n)O_(140)}(n=0–2).These rare species not only can display good powder and single-crystal proton conductivities,but also might provide helpful and atomic-level insights into the syntheses,structures and composition modifications of inorganic amorphous core-shell heterometal oxide nanoparticles.

关键词： Polyoxoniobate Core-shell Nanocluster Atomic-level modulation Proton conduction

土法纺织何以走上革命前线——边区妇女纺织技术传播研究

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妇女研究论丛 2024年第3期 82-102页

作者：孔煜也王洪喆北京大学新闻与传播学院北京100871

本文聚焦1943-1949年晋冀鲁豫太行区的妇女纺织技术实践,从传播机制与实践主体两方面入手,探讨物质生产与革命政治如何在技术实践中发生关联,这种技术实践又为妇女带来怎样的体验。基于对史料的考察,本文认为边区基层干部群众通过模范... 详细信息

本文聚焦1943-1949年晋冀鲁豫太行区的妇女纺织技术实践,从传播机制与实践主体两方面入手,探讨物质生产与革命政治如何在技术实践中发生关联,这种技术实践又为妇女带来怎样的体验。基于对史料的考察,本文认为边区基层干部群众通过模范学习、生产展览、经济计算、民主讨论、组织劳动等技术策略突破了代代相传的技术垄断传统,构建起一种以群众(尤其是妇女)为主体的技术政治。由此,妇女纺织不仅维持了边区军民的基本生计,也为中国基层技术实践积累了有益经验,同时为妇女进入社会性技术劳动领域做出了早期探索。这一案例为我们打开了一扇观察妇女与技术的总体性窗口——在妇女手中,土法纺织成为制造棉布与解放感的双重技术,将物质生产与革命政治交织成“新社会”的经纬。这次重访将为我们思考技术与性别、生产与政治的辩证关系提供启示。

关键词：妇女纺织技术传播群众实践边区建设技术与性别

全球人工智能大模型安全监管与标准化进展研究

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新型工业化 2024年第7期14卷 11-16页

作者：张虹刘哲中国电子技术标准化研究院北京100007

当前,生成式人工智能正在为千行百业赋予未来发展的想象空间。全球各国各地区高度重视人工智能大模型安全监管议题,并通过法案、战略、政策、标准等形式,探索如何实施更有效的安全监管。本文通过对美欧等国家和地区人工智能(AI)大模型... 详细信息

当前,生成式人工智能正在为千行百业赋予未来发展的想象空间。全球各国各地区高度重视人工智能大模型安全监管议题,并通过法案、战略、政策、标准等形式,探索如何实施更有效的安全监管。本文通过对美欧等国家和地区人工智能(AI)大模型安全监管政策的梳理,分析研究国际国内AI大模型在通用标准和行业标准等方面的相关进展,以展望未来国际竞合背景下,我国AI大模型安全监管与标准化的发展方向。

关键词：人工智能大模型大模型监管 AI立法标准化国际标准

氧化石墨烯和石墨烯的高浓度加工、致密化及应用

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新型炭材料（中英文） 2024年第3期39卷 483-505页

作者：王悦罗家亮鲁哲宏狄俊王苏炜姜炜南京理工大学化学与化工学院国家特种超细粉体工程技术研究中心江苏南京210094 中国科学院合肥物质科学研究院强磁场科学中心安徽合肥230031

由紧密堆叠的石墨烯片组成的致密石墨烯组件具有出色的化学稳定性和优异的力学、热学和电学性能。致密石墨烯组件不存在多孔石墨烯气凝胶中密度低、力学强度低、导电性差和导热性差等问题,是未来便携式电子和智能设备的理想材料。本文... 详细信息

由紧密堆叠的石墨烯片组成的致密石墨烯组件具有出色的化学稳定性和优异的力学、热学和电学性能。致密石墨烯组件不存在多孔石墨烯气凝胶中密度低、力学强度低、导电性差和导热性差等问题,是未来便携式电子和智能设备的理想材料。本文对制备方法进行了总结,包括利用机械分散、蒸发浓缩、离心浓缩和液相剥离法获得的高浓度氧化石墨烯(GO)和石墨烯分散液,以及利用真空辅助过滤、界面自组装和压制成型法获得的二维(2D)致密石墨烯基薄膜和三维(3D)致密石墨烯基结构,并评估了各种方法的优缺点。此外,还总结了致密石墨烯基组件在储能、热管理和电磁干扰(EMI)屏蔽方面的应用。最后,概述了致密石墨烯组件在未来研究中面临的挑战和前景。本综述为探索和开发大规模、低成本的制造技术和面向应用的致密石墨烯组件提供参考。

关键词：高浓度分散液致密石墨烯基组件二维薄膜三维结构应用

Catalytic Kinetic Determination of Micro Amounts of Oxalic Acid by Second-Order Derivative Oscillopolarography

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Chemical Research in Chinese Universities 2001年第1期17卷 41-47页

作者： LI Li jun hong zhe Guangxi Institute of Technology Liuzhou 545005P.R.China Chemical Engineering Department Dandong CollegeDandong 118003P.R.China

It was found that micro amounts of oxalate showed a very strong catalytic effect on the slow reaction between K 2Cr 2O 7 and Orange Ⅳ in a diluted sulfuric acid medium in a water bath at 70 ℃ . Orange Ⅳ exhibited a sensitive second order derivative polarographic wave at -0 50 V( vs . SCE). This provides the basis for a sensitive and selective catalytic kinetic method for oxalate determination with second order derivative oscillopolarography. The effects of sulphuric acid, K 2Cr 2O 7, and orange Ⅳ concentrations, reaction temperature and reaction time were investigated. A calibration curve of oxalate in the range of 0 1-2 0 μg/mL was obtained by the fixed time procedure. The detection limit was 0 03 μg/ mL. The possible interference from co existing substances or ions was examined. The new method has a high sensitivity and a good selectivity compared to other existing methods for oxalic acid determination. It has been applied to the determination of micro amounts of oxalate in real urine samples with satisfactory results.

关键词： Catalytic method Second order derivative polarography Orange Ⅳ Oxalic acid