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Dense carbon nanofiber self-supporting electrode fabricated by orientation/compaction strategy for high volumetric lithium storage capacity

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Progress in Natural Science:Materials International 2025年第01期 229-237页

作者： Haihui Liu Chaoqun Chen Qiang Xu Yan Song Xiangwu Zhang Chang Ma Tianjin Municipal Key Lab of Advanced Fiber and Energy Storage Technology Tiangong University CAS Key Laboratory of Carbon Materials Institute of Coal Chemistry Chinese Academy of Sciences Fiber and polymer Science Program Department of Textile Engineering Chemistry and Science Wilson College of Textiles North Carolina State University

Low bulk density greatly restricts the large-scale application of electrospun carbon-based fiber membrane as electrode in energy storage devices. To solve the above challenges, herein an orientation-compaction densification strategy is proposed to enhance the bulk density and volumetric capacity of PAN-based carbon nanofiber membranes as self-supporting electrode used in lithium-ion batteries（LIBs）. Specifically, highly-oriented fibers are achieved by high-speed roller collecting during electrospinning, and compaction densification is conducted by hot-pressing treatment. The effects of collecting speed and hot-pressing pressure on the morphology, conductivity,bulk density, tensile strength, and flexibility of the obtained carbon nanofiber membrane are *** to conventional fiber membranes, of which fibers are disorderly stacked, the oriented fiber membrane is much easier to achieve dense stacking by compaction. The obtained dense carbon nanofiber membrane demonstrates a bulk density of 0.566 g cm-3, and shows a significantly-enhanced volumetric capacity(318.3 mA h cm-3), high-rate performance(86.6 mA h cm-3at 5 A g-1), and satisfactory cycling stability when used as selfsupporting electrode of LIBs.

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Coating colloidal particles with a well-defined polymer layer by surface-initiated photoinduced polymerization-induced self-assembly and the subsequent seeded polymerization

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Chinese Chemical Letters 2025年第2期36卷 213-217页

作者： Bing Niu Honggao Huang Liwei Luo Li Zhang Jianbo Tan department of polymeric Materials and engineering School of Materials and EnergyGuangdong University of Technology Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter

Core-shell colloidal particles with a polymer layer have broad applications in different ***,we developed a two-step method combining aqueous surface-initiated photoinduced polymerization-induced self-assembly and photoinduced seeded reversible addition-fragmentation chain transfer (RAFT) polymerization to prepare a diverse set of core-shell colloidal particles with a well-defined polymer *** compositions,structures,and thicknesses of polymer layers could be conveniently regulated by using different types of monomers and feed[monomer]/[chain transfer agent]ratios during seeded RAFT polymerization.

关键词： Core-shell colloidal particles Photoinduced polymerization-induced self-assembly RAFT polymerization Seeded polymerization Surface-initiated polymerization

In situ preparation of composite gel electrolytes with high room-temperature ionic conductivity and homogeneous Na+flux for sodium metal batteries

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Science China Chemistry 2025年

作者： Yuzhuo Ding Longbin Li Shuo Xu Binghua Zhou Jing Wang Yiwang Chen Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education College of Chemistry and MaterialsJiangxi Normal University College of Chemistry and Chemical engineering Gannan Normal University School of Chemical engineering Jiangxi Normal University Film Energy Chemistry for Jiangxi Provincial Key Laboratory Institute of Polymer and Energy Chemistry Nanchang University

Gel polymer electrolytes（GPEs） are conceived to be a good way to build safer lithium/sodium metal batteries by substituting traditional liquid electrolytes. However, it is still very difficult for GPEs to simultaneously achieve high room-temperature ionic conductivity, uniform Na+flow, superior interfacial compatibility, and increased mechanical strength. Herein, a composite gel electrolyte（KNT-PTGPE） with high ionic conductivity of 4.06 mS cm-1is prepared through chemical crosslinking strategy and the introduction of inorganic nanoparticles. The hybrid gel polymer network is formed by in situ cross-linking modified TiO2（KNT）, three-armed trimethylolpropane trimethacrylate and poly（ethylene glycol） diacrylate. The resulting 3D interpenetrating network facilitates the absorption of liquid electrolytes and improves the mechanical properties of electrolyte. Theoretical calculation and in situ measurements reveal that the homogeneous TiO2fillers with abundant Lewis acid site and polymer network are involved in the solvation process of Na+, thus constructing a fast Na+transport channel. Consequently, a stable plating/stripping process lasting over 900 h is achieved due to the uniform distribution of Na+flux and the good mechanical properties of the electrolyte, and the assembled cell exhibits an excellent long-term cycling stability. The approach offers more opportunities to design GPEs for high performance SMBs.

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Enhanced subacute ischemic stroke treatment via multistage drug delivery system design for combination therapy

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Science China Chemistry 2025年

作者： Xihan Xu Juan-Juan Li Jiamin Li Hui-Yan Zhang Yilin Qi Bing-Sen Shi Tianqi Li Shan-Shan Su Weitao Zhao Chang Chen Zhongying Gong Huiyu Liu Ke-Rang Wang Dong-Sheng Guo Xue Xue State Key Laboratory of Medicinal Chemical Biology College of Pharmacy Nankai University College of Chemistry State Key Laboratory of Elemento-Organic Chemistry Key Laboratory of Functional Polymer Materials (Ministry of Education) Frontiers Science Center for New Organic Matter Collaborative Innovation Center of Chemical Science and EngineeringNankai University College of Chemistry and Materials Science State Key Laboratory of New Pharmaceutical Preparations and Excipients Key Laboratory of Medicinal Chemistry and Molecular Diagnosis (Ministry of Education) Key Laboratory of Chemical Biology of Hebei Province Hebei Research Center of the Basic Discipline of Synthetic Chemistry Hebei University department of Neurology Tianjin First Central Hospital School of Medicine Nankai University Beijing Advanced Innovation Center for Soft Matter Science and engineering State Key Laboratory of Organic-Inorganic Composites Beijing Laboratory of Biomedical Materials Bionanomaterials & Translational Engineering Laboratory Beijing Key Laboratory of BioprocessBeijing University of Chemical Technology

The management of acute ischemic stroke remains challenging due to its abrupt onset and the narrow treatment window,resulting in high rates of disability and *** therapy for neuroprotection and neurorepair strategies provided new hopes for subacute stroke *** we designed a multistage nanodelivery system that matches the unique microenvironment of the subacute phase of stroke,which utilizes calixarene as a building block to effectively load the neuroprotective drug *** calixarene is designed with glycosidic linkages targeting the glucose transporter 1 (GLUT1)on the blood-brain barrier (BBB) and azo bonds that are responsive to hypoxic ***,the decomposed calixarene molecules themselves possess intrinsic bio-activation to modulate inflammatory responses,achieving a multistage therapeutic approach that transitions from targeting to release and finally to *** approach combines anti-inflammation and neuroprotection,providing a multi-level treatment *** system was validated in a rat model of permanent middle cerebral artery occlusion (pMCAO),demonstrating that intravenous administration of the nanodelivery system repairs brain damage and improves motor function 24 h post-pMCAO *** work offers a precise and integrative strategy for stroke patients missing the acute therapy window to improve functional recovery and enhance the effect of comprehensive treatment.

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A self-powered cathodic molecular imprinting ultrasensitive photoelectrochemical tetracycline sensor via ZnO/C photoanode signal amplification

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Chinese Chemical Letters 2025年第1期36卷 539-544页

作者： Qinghong Pan Huafang Zhang Qiaoling Liu Donghong Huang Da-Peng Yang Tianjia Jiang Shuyang Sun Xiangrong Chen Key Laboratory of Chemical Materials and Green Nanotechnology College of Chemical Engineering and Materials ScienceQuanzhou Normal UniversityQuanzhou 362000China department of Neurosurgery the Second Affiliated Hospital of Fujian Medical UniversityQuanzhou 362000China School of Rehabilitation Science and engineering University of Health and Rehabilitation SciencesQingdao 266024China College of Food engineering Ludong UniversityYantai 264025China

Quantitative determination of tetracycline(TC)in environment and foods is of great importance,as excessive residues might have negative effects on human health and environmental ***,a selfpowered molecularly imprinted photoelectrochemical(PEC)sensor based on the Zn O/C photoanode and the Fe-doped CuBi_(2)O_(4)(CBFO)photocathode is developed for the sensitive detection of *** photocathodic current can be amplified by the efficient electron transfer caused by the Fermi energy level gap between the photoanode and ***,molecularly imprinted polymers(MIPs)at photocathode can selectivity identify the TC templates and thus improve the *** the optimal conditions,the sensor has a linear range of 10^(-2)-1.0×10^(5) nmol/L,and a limit of detection(LOD)of 0.007 nmol/L(S/N=3).More crucially,the milk sample detection is carried out using the as-prepared sensor,and the outcome is *** research gives us a novel sensing platform for quick and accurate antibiotic(like TC)in environment and food monitoring.

关键词： Self-powered photoelectrochemical sensor Molecularly imprinted polymer Fe-doped CuBi_(2)O_(4) Tetracycline detection

High-temperature-tolerant flexible supercapacitors: Gel polymer electrolytes and electrode materials

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Journal of Energy Chemistry 2025年第1期100卷 426-457页

作者： Chong Peng Xinyi Huang Mingwei Zhao Shuling Liao Quanhong Yang Nianjun Yang Siyu Yu School of Chemistry&Chemical engineering Southwest UniversityChongqing 400715 China Nanoyang Group Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy StorageSchool of Chemical Engineering and Technologyand Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin UniversityTianjin 300072 China department of Chemistry&IMO–IMOMEC Hasselt UniversityDiepenbeek 3590Belgium Received 26 July 2024Revised 19 Aug

The development of flexible supercapacitors(FSCs) capable of operating at high temperatures is crucial for expanding the application areas and operating conditions of supercapacitors. Gel polymer electrolytes and electrode materials stand as two key components that significantly impact the efficacy of hightemperature-tolerant FSCs(HT-FSCs). They should not only exhibit high electrochemical performance and excellent flexibility, but also withstand intense thermal stress. Considerable efforts have been devoted to enhancing their thermal stability while maintaining high electrochemical and mechanical performance. In this review, the fundamentals of HT-FSCs are outlined. A comprehensive overview of state-of-the-art progress and achievements in HT-FSCs, with a focus on thermally stable gel polymer electrolytes and electrode materials is provided. Finally, challenges and future perspectives regarding HT-FSCs are discussed, alongside strategies for elevating operational temperatures and *** review offers both theoretical foundations and practical guidelines for designing and manufacturing HT-FSCs, further promoting their widespread adoption across diverse fields.

关键词： Flexible supercapacitors High-temperature tolerance Gel polymer electrolytes Electrode materials

WHAT ARE THE DIFFERENCES OF polymer SURFACE RELAXATION FROM THE BULK?

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Chinese Journal of polymer Science 2011年第1期29卷 81-86页

作者： Ian Mann Ryan M.Van Horn Jason J.Ge Matthew J.Graham Frank W.Harris Stephen Z.D.Cheng College of polymer Science and polymer engineering Department of Polymer Sciencethe University of Akron

The polymer surface relaxation in thin films has been a long debating issue. We report a new method on studying surface relaxation behaviors of polymer thin films on a solid substrate. This method involved utilizing a rubbed polyimide surface with a pretilting angle in a liquid crystalline cell. Due to the surface alignment, the liquid crystals were aligned along the rubbing direction. During heating the liquid crystalline cell, we continuously monitored the change of orientation of the liquid crystals. It is understood that at a temperature where the orientation of liquid crystal is lost, the surface relaxation on the glass substrate takes place to lose the polyimide surface orientation. It was found that the relaxation temperature at which the liquid crystals lose their orientation depends on the film thickness of the polyimide. A quantitative linear relationship between the relaxation temperature and reciprocal of the film thickness can be observed. Furthermore, different topologies of the rubbed and relaxed thin films were amplified using the polyethylene decoration method and observed using atomic force microscopy.

关键词： Surface relaxation Liquid crystal orientation Polyethylene decoration.

A Modern Approach to the Solution and Analysis of the Simha-Somcynsky Model for the Description of Pressure-Volume-Temperature Properties of polymer Fluids

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Chinese Journal of polymer Science 2015年第4期33卷 523-523,524-539页

作者： Gustavo A.Carri department of polymer Science College of Polymer Science and Polymer EngineeringThe University of Akron

We revisit the Simha-Somcynsky model of polymer fluids with the purpose of developing novel theoretical and computational approaches to simplify and speed up its solution as well as the fitting of experimental data, and decrease its level of mathematical complexity. We report a novel method that allows us to solve one of the two equations of the model exactly, thus putting the level of mathematical difficulty on a par with the one of other models for polymer fluids. Moreover, we describe a computational algorithm capable of fitting all five parameters of the model in an unbiased way. The results obtained reproduce literature results and fit experimental pressure-volume-temperature and solubility parameter data for three polymers very accurately. Moreover, the new techniques allow for the investigation of the model at very low temperatures. Unexpectedly, the model predicts behaviors that could be interpreted as a glass transition, as routinely observed in dilatometry and differential scanning calorimetry, and a glass phase. We compared the predicted and experimental Tg＇s for cis poly（1,4-butadiene） and found an excellent quantitative agreement.

关键词： Simha-Somcynsky model PVT properties polymer fluids.

A Comprehensive Review of Natural Fibers:Bio-Based Constituents for Advancing Sustainable Materials Technology

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Journal of Renewable Materials 2025年第2期13卷 273-295页

作者： Sachin Ghalme Mohammad Hayat Mahesh Harne department of Mechanical engineering Sandip Institute of Technology and Research CentreNashik422213MSIndia department of Mechanical engineering St.Vincent Pallotti College of Engineering and TechnologyNagpur441108MSIndia department of Mechanical engineering Amrutvahini College of EngineeringSangamner422605MSIndia

With growing concerns for global warming and environmental issues,the research community has contributed significantly to green technology in the area of material science through the development of natural fiber-reinforced polymer composites(NFRPC).polymers serve as the matrix in NFRPC,while natural fibers serve as the reinforcing *** for high-performing materials made with natural resources is growing *** fiber-reinforced polymer composites are sustainable biocomposites fabricated with natural fibers embedded with a polymer *** offer a wide range of advantages,including a low weight-to-strength ratio,high flexural strength,damping properties,and resistance to corrosion,wear,and *** the basic properties,characteristics,and processing techniques for natural fibers is important to consider their use as raw materials for high-quality *** fibers come with low density and a high strengthto-weight ratio,allowing them to be a potential reinforcement for low-weight *** article attempts to present a comprehensive review of the available natural fibers,their classification,types,structures,physical properties,characteristics,and mechanical *** fibers are hydrophilic in nature and require physical and chemical treatment prior to their application as reinforcing *** review will also cover the required physical and chemical treatments of natural fibers for fabricating biocomposites.

关键词： Natural fibers biopolymers natural fiber-reinforced polymer composites physical and mechanical properties