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Construction of Safety and Non-flammable Polyimide Separator Containing Carboxyl Groups for Advanced Fast Charing Lithium-ion Batteries

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Chinese Journal of Polymer Science 2022年第4期40卷 345-354页

作者： Ji-Ping Gu kai-yuan zhang Xiu-Ting Li Jie Dong Qing-Hua zhang Xin Zhao State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

With the wide applications of lithium-ion batteries(LIBs)in electronic devices and electric vehicles,it is of great importance to improve their safety and electrochemical ***,soluble polyimides(PI)containing carboxyl groups(―COOH)were synthesized by a simple one-step method and PI separators with sponge-like,interpenetrating porous structures were prepared via non-solvent induced phase separation(NIPS).The obtained PI separators exhibited excellent thermal stability and fire-resistance properties,with the electrolyte uptake of 344%and good dimensional integrity in air at 200℃.The results showed that the lithium-ion transference number of the obtained PI separator could reach 0.48,which was much higher than that of the Celgard-2400 separator(0.38).The Li/LiFePO_(4) half-cell with the PI separator showed excellent cycle capability and high-rate performance with a high capacity of 121.80 mA·h·g^(-1) at 5 C,which was better than that of the cell with the Celgard-2400 separator(54.3 mA·h·g^(-1)),demonstrating the promising applications of this PI separators in LIBs.

关键词： Polyimide Separator Carboxyl groups Non-solvent induced phase separation Li transference number

Highly Red Emissive Conjugated Homopolymers Based on Double B←N Bridged Bipyridine Unit

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Chinese Journal of Polymer Science 2024年第8期42卷 1029-1037页

作者： Yu-Yue Gao kai-yuan zhang Shu-Meng Wang Hui Tong Jun Liu State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China

Conjugated homopolymers based on six-member rings,e.g.,polyfluorene,always exhibit blue emission and conjugated homopolymers based on five-member rings,e.g.,polythiophene,can give red emission with low *** this work,we report a series of new conjugated homopolymers based on six-member rings with high-efficiency deep-red *** repeating units of the red light emitting homopolymers are double B←N bridged bipyridine(BNBP)with the boron atoms functionalized with diphenyl,borafluorene,and 2,7-di-tert-butyl-borafluorene groups,*** relationship between the chemical structures and the opto-electronic properties of the monomers and the homopolymers has been systematically *** three polymers emit pure red light(λ_(max)=656 nm)or deep red light(λ_(max)=693 nm)with fluorescence quantum efficiency in solution higher than 60%.The polymers can be used as the emitters in solution-processed organic light-emitting diodes with red emission and decent device *** work indicates a new strategy to design highly efficient light emitting conjugated polymers.

关键词： Conjugated homopolymers Double B←N bridged bipyridine(BNBP) Deep-red emission High fluorescent efficiency

Possible existence of bound nuclei beyond neutron drip lines driven by deformation

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Chinese Physics C 2021年第10期45卷 1-6页

作者： Xiao-Tao He Chen Wang kai-yuan zhang Cai-Wan Shen College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China School of Science Huzhou UniversityHuzhou 313000China

Based on the relativistic calculations of the nuclear masses in the transfermium region from No(Z=102)to Ds(Z=110)using the deformed relativistic Hartree-Bogoliubov theory in continuum(DRHBc),the possible existence of bound nuclei beyond the neutron drip lines is *** two-neutron and multi-neutron emission bound nuclei beyond the primary neutron drip line of N=258 are predicted in Z=106,108,and 110 isotopes.A detailed microscopic mechanism investigation reveals that nuclear deformation plays a vital role in the existence of bound nuclei beyond the drip ***,not only the quadrupole deformation β_(2) but also the higher orders of deformation are indispensable in the reliable description of the phenomenon of reentrant binding.

关键词： neutron drip line transfermium nuclei deformation DRHBc theory reentrant binding nuclear mass

Beyond-mean-field dynamical correlations for nuclear mass table in deformed relativistic Hartree-Bogoliubov theory in continuum

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Chinese Physics C 2022年第6期46卷 154-163页

作者： Wei Sun kai-yuan zhang Cong Pan Xiao-Hua Fan Shuang-Quan zhang Zhi-Pan Li School of Physical Science and Technology Southwest UniversityChongqing 400715China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China

We extend the deformed relativistic Hartree-Bogoliubov theory in continuum(DRHBc)to go beyondmean-field framework by performing a two-dimensional collective *** influences of dynamical correlations on the ground-state properties are examined in different mass regions,picking Se,Nd,and Th isotopic chains as *** is found that the dynamical correlation energies(DCEs)and the rotational correction energies E_(rot) in the cranking approximation have an almost equivalent effect on the description of binding energies for most deformed nuclei,and the DCEs can provide a significant improvement for the(near)spherical nuclei close to the neutron shells and thus reduce the rms deviations of S_(2n) by≈17%.Furthermore,it is found that the DCEs are quite sensitive to the pairing correlations;taking ^(148)Nd as an example,a 10%enhancement of pairing strength can raise the DCE by≈37%.

关键词： mass table covariant density functional theory dynamical correlation energy collective Hamiltonian

Endovenous laser ablation of great saphenous vein with ultrasound-guided perivenous tumescence： early and midterm results

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Chinese Medical Journal 2013年第3期126卷 421-425页

作者： CHEN Jia-quan XIE Hui DENG Hao-yu yuan kai zhang Ji-wei zhang Hao zhang Lan Department of Vascular Surgery Renji Hospital School of Medicine Shanghai Jiao Tong University Shanghai 200127 China

Background Endovenous laser ablation （EVLA） is an improved method to treat varicose great saphenous veins （GSV） with a high satisfactory rate. This study aimed to evaluate the efficiency and safety of treatment by EVLA procedures with ultrasound-guided perivenous tumescence. Methods Thirty-one patients （31 limbs） with symptomatic varicose vein primary to chronic venous insufficiency （CVI） treated with EVLA were prospectively studied. The entire procedure was performed under ultrasound-guided tumescent local anesthesia. The patients were evaluated with a 18 month follow-up postoperation using clinical examination and venous duplex ultrasonography. Pain scores and quality of life （QOL） were recorded using visual analog scale （VAS） and the chronic venous insufficiency questionnaire （CIVIQ） at 1 week, 1 month, and 12 months after operation. Results All patients tolerated EVLA procedure well. The overall success occlusion rates of GSV were 92%, 94%, and 94% at 1, 12, and 18 months follow-up, respectively. The score of CIVIQ one week preoperation was 69.14±11.44 while that of CIVIQ one month postoperation was 85.32±4.89. The life quality has significantly improved after the operation of EVLA （t=12.71, P 〈0.05）. The VAS one month after treatment was lower than 1 week before therapy （t=8.048, P 〈0.05）. Major complications such as deep vein thrombosis and skin burns were not found. Most of the complications were minor and improved quickly. Conclusions This refinement type of EVLA procedure is a safe and effective treatment with a high satisfaction rate; it displayed noteworthy features including shortening hospitalization, early ambulant activity, and preferable occlusion rates.

关键词： endovenous laser ablation great saphenous vein occlusion tumescent anaesthesia

Cyclophilin D-induced mitochondrial impairment confers axonal injury after intracerebral hemorrhage in mice

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Neural Regeneration Research 2023年第4期18卷 849-855页

作者： Yang Yang kai-yuan zhang Xue-Zhu Chen Chuan-Yan Yang Ju Wang Xue-Jiao Lei Yu-Lian Quan Wei-Xiang Chen Heng-Li Zhao Li-Kun Yang Yu-Hai Wang Yu-Jie Chen Hua Feng Department of Neurosurgery The 904th Hospital of PLAAnhui Medical UniversityWuxiJiangsu ProvinceChina Department of Neurosurgery and State Key Laboratory of Trauma Burn and Combined InjurySouthwest HospitalThird Military Medical University(Army Medical University)ChongqingChina Chongqing Key Laboratory of Precision Neuromedicine and Neuroregenaration Third Military Medical University(Army Medical University)ChongqingChina Wuxi Translational Medicine Center WuxiJiangsu ProvinceChina Department of Neurosurgery General Hospital of Xinjiang Military Command of PLAUrumqiXinjiang Uygur Autonomous RegionChina Department of Neurology The Second Medical Center&National Clinical Research Center for Geriatric DiseasesChinese PLA General HospitalBeijingChina

The mitochondrial permeability transition pore is a nonspecific transmembrane *** of mitochondrial permeability transition pore opening has been shown to alleviate mitochondrial swelling,calcium overload,and axonal *** D is an important component of the mitochondrial permeability transition *** cyclophilin D participates in mitochondrial impairment and axonal injury after intracerebral hemorrhage is not *** this study,we established mouse models of intracerebral hemorrhage in vivo by injection of autologous blood and oxyhemoglobin into the striatum in Thy1-YFP mice,in which pyramidal neurons and axons express yellow fluorescent *** also simulated intracerebral hemorrhage in vitro in PC12 cells using *** found that axonal degeneration in the early stage of intracerebral hemorrhage depended on mitochondrial swelling induced by cyclophilin D activation and mitochondrial permeability transition pore *** further investigated the mechanism underlying the role of cyclophilin D in mouse models and PC12 cell models of intracerebral *** found that both cyclosporin A inhibition and short hairpin RNA interference of cyclophilin D reduced mitochondrial permeability transition pore opening and mitochondrial *** addition,inhibition of cyclophilin D and mitochondrial permeability transition pore opening protected corticospinal tract integrity and alleviated motor dysfunction caused by intracerebral *** findings suggest that cyclophilin D is used as a key mediator of axonal degeneration after intracerebral hemorrhage;inhibition of cyclophilin D expression can protect mitochondrial structure and function and further alleviate corticospinal tract injury and motor dysfunction after intracerebral *** findings provide a therapeutic target for preventing axonal degeneration of white matter injury and subsequent functional impairment in central nervous diseases.

关键词： axonal injury corticospinal tract cyclophilin D cyclosporin A intracerebral hemorrhage mitochondrial impairment mitochondrial permeability transition pore motor dysfunction retraction bulb white matter

Assessing the corrosion protection property of coatings loaded with corrosion inhibitors using the real-time atmospheric corrosion monitoring technique

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 119-126页

作者： Xiaoxue Wang Lulu Jin Jinke Wang Rongqiao Wang Xiuchun Liu kai Gao Jingli Sun Yong yuan Lingwei Ma Hongchang Qian Dawei zhang School of Energy and Power Engineering Beihang UniversityBeijing 100191China Beijing Institute of Space Long March Vehicle Beijing 100076China National Materials Corrosion and Protection Data Center University of Science and Technology BeijingBeijing 100083China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang 110004China Shanghai Spaceflight Precision Machinery Institute Shanghai 201600China

The atmospheric corrosion monitoring(ACM)technique has been widely employed to track the real-time corrosion behavior of metal ***,limited studies have applied ACM to the corrosion protection properties of organic *** study compared a bare epoxy coating with one containing zinc phosphate corrosion inhibitors,both applied on ACM sensors,to observe their corrosion protection properties over *** with artificial damage via scratches were exposed to immersion and alternating dry and wet environments,which allowed for monitoring galvanic corrosion currents in *** the corrosion tests,the ACM currents of the zinc phosphate/epoxy coating were considerably lower than those of the blank epoxy *** trend in ACM current variations closely matched the results obtained from regular electrochemical tests and surface *** alignment highlights the potential of the ACM technique in evaluating the corrosion protection capabilities of organic *** with the blank epoxy coating,the zinc phosphate/epoxy coating showed much-decreased ACM current values that confirmed the effective inhibition of zinc phosphate against steel corrosion beneath the damaged coating.

关键词： atmospheric corrosion monitoring technology corrosion inhibitor coating carbon steel corrosion protection

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基于钢筋砼支柱的内错瓦斯尾巷底臌控制机制

煤炭学报 2016年第9期41卷 2180-2187页

作者：王凯郝兵元张鹏鹏乔永凤山西工程技术学院采矿工程系山西阳泉045000 太原理工大学矿业工程学院山西太原030024

为解决高瓦斯综放工作面内错瓦斯尾巷强烈底臌问题,采用现场实测、理论分析及相似模拟的方法揭示了底臌机制,并据此提出针对性的控制方法。结果表明:在支承压力作用下,底板两侧煤体发生剪切破坏,导致底板被切割为三角区,并在下侧塑性区... 详细信息

为解决高瓦斯综放工作面内错瓦斯尾巷强烈底臌问题,采用现场实测、理论分析及相似模拟的方法揭示了底臌机制,并据此提出针对性的控制方法。结果表明:在支承压力作用下,底板两侧煤体发生剪切破坏,导致底板被切割为三角区,并在下侧塑性区挤压下抬升形成整体"一"字形底臌;受采动应力的强烈影响,两帮松动圈不断扩大,巷道有效跨度增加,巷帮下底板相继出现新的剪切滑移面,使更多底板煤体参与底臌,导致底臌量不断攀升。基于内错瓦斯尾巷底臌机理及其对支护方面的特殊要求,研发了新型大底座钢筋砼支柱,通过其"控底-助帮"作用实现底臌控制。即沿尾巷轴线布置一排钢筋砼支柱,将顶板荷载传递致底板中央以对其施加反向约束,继而减轻两帮载荷,抑制巷帮松动圈范围扩大,最终实现底臌控制。该控制方法应用于阳煤集团二矿80704综放工作面内错尾巷,成功维护了底板稳定。

关键词：内错瓦斯尾巷底臌控制剪切滑移破坏钢筋砼支柱

Repetitive traumatic brain injury–induced complement C1–related inflammation impairs long-term hippocampal neurogenesis

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Neural Regeneration Research 2025年第3期20卷 821-835页

作者： Jing Wang Bing zhang Lanfang Li Xiaomei Tang Jinyu Zeng Yige Song Chao Xu kai Zhao Guoqiang Liu Youming Lu Xinyan Li kai Shu Department of Neurosurgery Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina Department of Neurosurgery Shanxi Bethune HospitalShanxi Academy of Medical SciencesTongji Shanxi HospitalThird Hospital of Shanxi Medical UniversityTaiyuanShanxi ProvinceChina Department of Pathophysiology School of Basic Medicine and Tongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina Institute for Brain Research Wuhan Center of Brain ScienceHuazhong University of Science and TechnologyWuhanHubei ProvinceChina Department of Graduate Student Chongqing Medical UniversityChongqingChina Department of Basic Medicine School of Medical ScienceHubei University for NationalitiesEnshiHubei ProvinceChina Department of Anatomy School of Basic Medicine and Tongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina

Repetitive traumatic brain injury impacts adult neurogenesis in the hippocampal dentate gyrus,leading to long-term cognitive ***,the mechanism underlying this neurogenesis impairment remains *** this study,we established a male mouse model of repetitive traumatic brain injury and performed long-term evaluation of neurogenesis of the hippocampal dentate gyrus after repetitive traumatic brain *** results showed that repetitive traumatic brain injury inhibited neural stem cell proliferation and development,delayed neuronal maturation,and reduced the complexity of neuronal dendrites and *** with repetitive traumatic brain injuryalso showed deficits in spatial memory ***,following repetitive traumatic brain injury,neuroinflammation was enhanced in the neurogenesis microenvironment where C1q levels were increased,C1q binding protein levels were decreased,and canonical Wnt/β-catenin signaling was *** inhibitor of C1 reversed the long-term impairment of neurogenesis induced by repetitive traumatic brain injury and improved neurological *** findings suggest that repetitive traumatic brain injury–induced C1-related inflammation impairs long-term neurogenesis in the dentate gyrus and contributes to spatial memory retrieval dysfunction.

关键词： complement C1 dendrite dentate gyrus hippocampus neural stem cell neurogenesis neuroinflammation neurological function neuron traumatic brain injury