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Carbon enhanced nucleophilicity of Na_(3)V_(2)(PO_(4))_(3):A general approach for dendrite-free zinc metal anodes

Journal of Energy Chemistry 2024年第4期91卷 203-212页

作者： Sijun Wang Lingzi Hu Xiaohui Li Dan qiu Shunhang qiu Qiancheng Zhou Wenwen Deng Xiaoying Lu Ze Yang ming qiu Ying Yu Institute of Nanoscience and Nanotechnology School of Physical Science and TechnologyCentral China Normal UniversityWuhan 430079HubeiChina School of Material Science and Engineering Suzhou University of Science and TechnologySuzhou 215000JiangsuChina Faculty of Science and Technology Technological and Higher Education Institute of Hong KongHong KongChina

Zincophilic property and high electrical conductivity are both very important parameters to design novel Zn anode for aqueous Zn-ion batteries(AZIBs).However,single material is difficult to exhibit zincophilic property and high electrical conductivity at the same ***,originating from theoretical calculation,a zincophilic particle regulation strategy is proposed to address these limitations and carbon coated Na_(3)V_(2)(PO_(4))_(3)is taken as an example to be a protective layer on zinc metal(NVPC@Zn).Na_(3)V_(2)(PO_(4))_(3)(NVP)is a common cathode material for Zn-ion batteries,which is *** materials not only offer an electron pathway to help Zn deposition onto NVPC surface,but also enhance the zinc nucleophilicity of Na_(3)V_(2)(PO_(4))_(3).Hence,this hybrid coating layer can tune zinc deposition and resist side reactions such as hydrogen generation and Zn metal ***,a symmetrical battery with NVPC@Zn electrode displays highly reversible plating/stripping behavior with a long cycle lifespan over 1800 h at2 mA cm^(-2),much better than carbon and Na_(3)V_(2)(PO_(4))_(3)solely modified Zn *** the Na_(3)V_(2)(PO_(4))_(3)is replaced with zincophobic Al2O3or zincophilic V2O3,the stability of the modified zinc anodes is also *** strategy expands the option of zincophilic materials and provides a general and effective way to stabilize the Zn electrode.

关键词： Zinc-ion batteries Zinc anode Carbon enhanced nucleophilicity Zincophilic particle regulation

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Thermally Conductive,Healable Glass Fiber Cloth Reinforced Polymer Composite based onβ-Hydroxyester Bonds Crosslinked Epoxy with Improved Heat Resistance

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Chinese Journal of Polymer Science 2024年第5期42卷 643-654,I0009页

作者： Fang Chen Xiao-Yan Pang Ze-Ping Zhang Min-Zhi Rong ming-qiu Zhang Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education GD HPPC LabIGCMESchool of ChemistrySun Yat-sen UniversityGuangzhou510275China Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center Jieyang515200China

To simultaneously endow thermal conductivity,high glass transition temperature(Tg)and healing capability to glass fiber/epoxy(GFREP)composite,dynamic crosslinked epoxy resin bearing reversibleβ-hydroxyl ester bonds was reinforced with boron nitride nanosheets modified glass fiber cloth(GFC@BNNSs).The in-plane heat conduction paths were constructed by electrostatic self-assembly of polyacrylic acid treated GFC and polyethyleneimine decorated ***,the GFC@BNNSs were impregnated with the mixture of lower concentration(3-glycidyloxypropyl)trimethoxysilane grafted BN micron sheets,3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate and hexahydro-4-methylphthalic anhydride,which accounted for establishing the through-plane heat transport pathways and avoiding serious deterioration of mechanical *** resultant GFREP composite containing less boron nitride particles(17.6 wt%)exhibited superior in-plane(3.29 W·m^(-1)·K^(-1))and through-plane(1.16 W·m^(-1)·K^(-1))thermal conductivities,as well as high Tg of 204℃(Tg of the unfilled epoxy=177℃).The reversible transesterification reaction enabled closure of interlaminar cracks within the composite,achieving decent healing efficiencies estimated by means of tensile strength(71.2%),electrical breakdown strength(83.6%)and thermal conductivity(69.1%).The present work overcame the disadvantages of conventional thermally conductive composites,and provided an efficient approach to prolong the life span of thermally conductive GFREP laminate for high-temperature resistant integrated circuit application.

关键词： Thermally conductive composites Boron nitride High-temperature resistance β-Hydroxyl ester bond Healing

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Topological Confinement in Reversibly Interlocked Polymer Networks

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Chinese Journal of Polymer Science 2024年第2期42卷 133-140,I0004页

作者： Wan-Ting Dai Zhen-Hua Xie Yu-Bin Ke Yang You Min-Zhi Rong ming-qiu Zhang Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education GD HPPC LabIGCMESchool of ChemistrySun Yat-sen UniversityGuangzhou510275China Spallation Neutron Source Science Center China Spallation Neutron SourceDongguan523803China Institute of High Energy Physics Chinese Academy of SciencesBeijing100049China College of Materials and Metallurgy Guizhou UniversityGuiyang550025China

Recently, we reported a series of reversibly interlocked polymer networks(RILNs), whose mechanical robustness and functionalities improvement was believed to be derived from topological interlocking of two sub-networks, although the direct evidence for the deduction is still lacking. Herein, a specially-designed RILNs system, in which the inter-component hydrogen bonds can be shielded as needed, was prepared and used to study the micro-structures of RILNs, aiming to verify the existence of mechanical interlocking in RILNs. By changing the pH of the swelling solvent, the effect exerted by the inter-component non-covalent bonds was eliminated, so detailed information of the networks structure was exposed. The small angle X-ray scattering(SAXS) and small-angle neutron scattering(SANS) results indicated that swelling-induced structural evolution of the two sub-networks mutually affected each other, even when the inter-component hydrogen bonds were absent, proving the presence of topological interlocking. The findings may help to draw a more accurate physical image and reveal the detailed structureproperty relationship of RILNs.

关键词： Reversibly interlocked polymer networks Small angle X-ray scattering Small-angle neutron scattering Topological confinement

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Nature-Inspired pH-Responsive Hydrogels with Rapid and High Contrast Changes in Color, Fluorescence, and Shape Simultaneously

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Chinese Journal of Polymer Science 2024年第11期 1758-1767页

作者： Le-Ping Xiao Lv-ming qiu Zhen Wu Guo-Jie Wang School of Materials Science and Engineering University of Science and Technology Beijing

To realize single-stimulus-induced simultaneous multi-behaviors in hydrogels is still quite challenging ***,an intelli gent pH-responsive hydrogel （BP4VA/PAS） with rapid and high contrast changes in color,fluorescence,and shape simultaneously is reported The BP4VA/PAS hydrogel is fabricated by incorporating styryl anthracene derivative （BP4VA） into copolymer networks （PAS） of acrylamide and sodium 4-styrene *** acid conditions,the protonation of BP4VA generates a rapid change with high color contrast from yellow to red and a fluorescence switch between bright green and weak red *** the same time,the electrostatic interactions between 2H-BP4VA2+and sulfonate anions suspended on PAS trigger BP4VA/PAS hydrogels to *** alkaline treatment,the 2H-BP4VA2+/PAS hydrogel deproto nates and recovers to its original color,fluorescence,and ***,utilizing rapid and remarkable pH-responsive properties o BP4VA/PAS hydrogels,we successfully demonstrated its applications in biomimicry,camouflage,and multistage information *** tively,this work provided an elegant strategy to develop intelligent hydrogels in applications of biomimetic smart materials and information en cryption.

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Thermal and Magnetic Dual-Responsive Catheter-Assisted Shape Memory Microrobots for Multistage Vascular Embolization

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Research 2024年第3期2024卷 529-543页

作者： Qianbi Peng Shu Wang Jianguo Han Chenyang Huang Hengyuan Yu Dong Li ming qiu Si Cheng Chong Wu mingxue Cai Shixiong Fu Binghan Chen Xinyu Wu Shiwei Du Tiantian Xu Guangdong Provincial Key Lab of Robotics and Intelligent Systems Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenChina University of Chinese Academy of Sciences BeijingChina Department of Neurosurgery South China HospitalMedical SchoolShenzhen University.ShenzhenChina The Key Laboratory of Biomedical Imaging Science and System Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenChina.

Catheters navigating through complex vessels,such as sharp turns or multiple U-turns,remain challenging for vascular ***,we propose a novel multistage vascular embolization strategy for hard-to-reach vessels that releases untethered swimming shape-memory magnetic microrobots(SMMs)from the prior catheter to the vessel ***,made of organo-gel with magnetic particles,ensure biocompatibility,radiopacity,thrombosis,and fast thermal and magnetic *** SMM is initially a linear shape with a 0.5-mm diameter at 20°C inserted in a *** transforms into a predetermined helix within 2 s at 38°C blood temperature after being pushed out of the catheter into the *** enable agile swimming in confined and tortuous vessels and can swim upstream using helical propulsion with rotating magnetic ***,we validated this multistage vascular embolization in living rabbits,completing 100-cm travel and renal artery embolization in 2 *** 4 weeks,the SMMs maintained the embolic position,and the kidney volume decreased by 36%.

关键词： turns maintained travel

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Injection molding of highly filled microcrystalline cellulose/polycaprolactone composites with the aid of reversible Diels-Alder reaction

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Journal of Materials Science & Technology 2024年第3期170卷 246-254页

作者： Ze Pu Wang WenHong Ruan MinZhi Rong mingqiu Zhang Key Laboratory for Polymeric Composite and Functional Materials of MOE GD HPPC LabIGCMESchool of ChemistrySun Yat-Sen UniversityGuangzhou 510275China

To tackle the challenge of producing highly filled polymer composites using the traditional injection molding technique,which is characterized by the fairly high melt viscosity that makes mold filling difficult,the authors propose a solution based on dynamic covalent *** demonstrated by the proof-of-concept experiments,the 4-arm starshaped polycaprolactone(PCL)oligomers and microcrystalline cel-lulose(MCC)are crosslinked by the reversible Diels-Alder(DA)*** flowability of the compounds greatly decreases due to the dissociation of the intercomponent DA bonds at the retro-reaction tempera-ture,and the networked architecture is reconstructed during cooling as a result of the forward DA ***,the high-loading MCC fillers are well distributed in the matrix and covalently bonded to the nearby PCL,forming a striking contrast to the control in which linear PCL acts as the *** DA bonds crosslinked biodegradable PCL composites exhibit decent mechanical strength(20.7 MPa)even at the MCC fraction of 65 wt%,which is superior to those(5-12.2 MPa)of the highly filled PCL composites(with filler contents of 50-63.8 wt%)reported so *** proposed approach has sufficient expansibility for the fabrication of the highly filled polymer composites constructed by other types of matrix and fillers.

关键词： Polymer composites Microcrystalline cellulose Polycaprolactone Injection molding Dynamic reversible chemistry

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Amorphous core-shell NiMoP@CuNWs rod-like structure with hydrophilicity feature for efficient hydrogen production in neutral media

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Chinese Journal of Catalysis 2024年第8期63卷 154-163页

作者： Jiayong Xiao Chao Jiang Hui Zhang Zhuo Xing ming qiu Ying Yu College of Physical Science and Technology Central China Normal UniversityWuhan 430079HubeiChina

Using interface engineering,a highly efficient catalyst with a shell@core structure was successfully synthesized by growing an amorphous material composed of Ni,Mo,and P on Cu nanowires(Ni-MoP@CuNWs).This catalyst only requires an overpotential of 35 mV to reach a current density of 10 mA cm^(-2).The exceptional hydrogen evolution reaction(HER)activity is attributed to the unique amorphous rod-like nature of NiMoP@CuNWs,which possesses a special hydrophilic feature,en-hances mass transfer,promotes effective contact between the electrode and electrolyte solution,and exposes more active sites during the catalytic *** functional theory revealed that the introduction of Mo weakens the binding strength of the Ni site on the catalyst surface with the H atom and promotes the desorption process of the H_(2)product *** to its facile syn-thesis,low cost,and high catalytic performance,this electrocatalyst is a promising option for com-mercial applications as a water electrolysis catalyst.

关键词： Amorphous Three-dimensional core-shell Electrodeposition Neutral electrolyte Electrocatalyst Hydrogen evolution reaction

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The activation of adenosine monophosphate–activated protein kinase inhibits the migration of tongue squamous cell carcinoma cells by targeting Claudin-1 via epithelial–mesenchymal transition

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Animal Models and Experimental Medicine 2024年第05期 606-616页

作者： Xin-Yue Zhou qiu-ming Liu Zhuang Li Xia-Yang Liu Qi-Wei Zhao Yu Wang Feng-Hua Wu Gang Zhao Rui Sun Xiao-Hong Guo Department of Basic Medicine Hubei University of Chinese Medicine Hubei Shizhen Laboratory Sino-German Biomedical Center Hubei University of Technology Center of Applied Biotechnology Wuhan Institute of Bioengineering Department of Stomatology Shanxi Bethune Hospital Shanxi Academy of Medical Sciences Tongji Shanxi Hospital Third Hospital of Shanxi Medical University Department of Oral and Maxillofacial Surgery Shanxi Provincial People's Hospital

Background: The role of Claudin-1 in tongue squamous cell carcinoma(TSCC) metastasis needs further clarification, particularly its impact on cell migration. Herein, our study aims to investigate the role of Claudin-1 in TSCC cell migration and its underlying ***: 36 TSCC tissue samples underwent immunohistochemical staining for Claudin-1. Western blotting and immunofluorescence analyses were conducted to evaluate Claudin-1 expression and distribution in TSCC cells. Claudin-1 knockdown cell lines were established using short hairpin RNA transfection. Migration effects were assessed through wound healing assays. Furthermore, the expression of EMTassociated molecules was measured via western ***: Claudin-1 expression decreased as TSCC malignancy increased. Adenosine monophosphate–activated protein kinase(AMPK) activation led to increased Claudin-1 expression and membrane translocation, inhibiting TSCC cell migration and epithelial–mesenchymal transition(EMT). Conversely, Claudin-1 knockdown reversed these inhibitory effects on migration and EMT caused by AMPK ***: Our results indicated that AMPK activation suppresses TSCC cell migration by targeting Claudin-1 and EMT pathways.

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基于机器学习的深海多金属结核成因分类

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科学技术与工程 2024年第25期24卷 10605-10619页

作者：尹浩文成秋明中山大学地球科学与工程学院珠海519000 中国地质大学地质过程与矿产资源国家重点实验室北京100083 中国地质大学教育部深时数字地球前沿科学中心北京100083

铁锰结核广泛分布于深海平原,储量巨大,具有商业开采潜力。利用1128个铁锰结核样本的地球化学数据和8种地质与海洋要素,采用随机森林机器学习方法,探讨结核成因分类。首先,基于Mn、Fe、Cu、Co、Ni、Mn/Fe和Fe/Co地球化学数据使用高斯混... 详细信息

铁锰结核广泛分布于深海平原,储量巨大,具有商业开采潜力。利用1128个铁锰结核样本的地球化学数据和8种地质与海洋要素,采用随机森林机器学习方法,探讨结核成因分类。首先,基于Mn、Fe、Cu、Co、Ni、Mn/Fe和Fe/Co地球化学数据使用高斯混合模型聚类方法对1128个样本进行成因分类,并作为训练数据。其次,基于海底沉积速率、海水底部溶氧量和海水表面生物初级生产力等地质-海洋特征建立预测模型,将结核划分为水成型、成岩型和混合型,结果显示,模型对水成型和成岩型结核的分类精度分别为91%和66%,对混合型的分类精度较低,仅为23%。应用该模型对全球4119个铁锰结核进行成因分类,结果表明,水成型结核占71.8%,混合型占21.8%,成岩型占6.2%。水成型结核广泛分布于各大洋,而成岩型和混合型则集中在大洋中纬度地区,如东太平洋的克拉里昂-克里帕顿断裂带和东南太平洋的秘鲁海盆等。这些地区的沉积物速率、海底生物量和含氧量显著影响结核分布。尽管基于地球化学数据的分类方法更可靠,研究表明,利用地质和海洋要素及机器学习方法也可有效分类。

关键词：海洋矿产资源铁锰结核成因分类空间分布机器学习

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基于时间推进法的涡轮通流设计

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航空动力学报 2024年第8期39卷 344-355页

作者：蒋筑宇范召林邱名叶文明中国空气动力研究与发展中心空天技术研究所四川绵阳621000 中国空气动力研究与发展中心四川绵阳621000

为建立合理的涡轮设计参数计算方法,保证设计准确性,基于Euler方程时间推进通流设计方法,提出了一种基于二次函数的叶排通道S2流面周向角和堵塞系数近似计算方法。通流设计方法利用有限体积法求解正交曲线坐标系下的二维非守恒型Euler方... 详细信息

为建立合理的涡轮设计参数计算方法,保证设计准确性,基于Euler方程时间推进通流设计方法,提出了一种基于二次函数的叶排通道S2流面周向角和堵塞系数近似计算方法。通流设计方法利用有限体积法求解正交曲线坐标系下的二维非守恒型Euler方程,使用Riemann精确解确定网格单位界面参数,采用具有TVD性质的3阶精度Godunov格式,时间方向采用半隐式格式。利用经验损失模型计算叶型损失、二次流损失和叶尖间隙泄漏流损失,并将二次流损失和叶尖间隙泄漏流损失沿径向进行重新分布,而激波损失被认为是可以准确计算。对某型单级涡轮进行了通流设计研究,并根据通流设计结果进行了三维叶片造型,利用三维黏性CFD软件对涡轮进行数值模拟,校验了通流设计方法的有效性。当涡轮进出口条件一定时,相比于三维CFD结果,通流流量结果高约1.46%,膨胀比低0.005,绝热效率高0.007 7。最后可以得到如下结论:通流设计方法所需网格量少,计算效率高,收敛性好;叶排通道S2流面周向角和堵塞系数计算方法合理;涡轮总体性能参数,以及流量系数、载荷系数和反力度等无量纲参数计算准确度较高。

关键词：轴流涡轮通流设计时间推进法 S2流面周向角堵塞系数

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