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Preparation and study of novel mid-to-low-temperature phase-change molten salts

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Science China Technological Sciences 2025年

作者： Chenxing REN Yifan WANG xin HE Chenghang zheng Xiang GAO State Key Laboratory of Clean Energy Utilization Zhejiang University Institute of Carbon Neutrality Zhejiang University Baima Lake Laboratory Zhejiang University

Molten salts is a promising medium for heat storage and heat transfer due to their advantages of low cost, low steam pressure, high energy storage density and wide temperature range. In this paper, a new phase change mixture of molten salts with KNO3, NaNO3, ZnCl2, NaF, Na2CO3, NaCl, and MgO as materials has been prepared through a plenty of experiments. The experimental results show that the melting point of some molten salts can be reduced to 202.9°C, and the decomposition temperature can reach 701.3°C. In addition, its thermophysical properties, including specific heat, viscosity and thermal stability, were measured and analyzed. The average specific heat of some molten salts is as high as 2.53 J/（g K）, and the average thermal conductivity is as high as 0.77 W/（m K）. In the 4-day short-term thermal stability test, the fluctuation of each parameter is minimal, and the overall thermal physical property is relatively stable. Compared with the traditional phase change molten salt, the new hybrid molten salt has a significantly lower melting point, a further improvement in the decomposition temperature, specific heat and other comprehensive thermophysical properties, and a better overall economy, which has important application value in heat transfer and energy storage.

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Resting-state brain network remodeling after different nerve reconstruction surgeries:a functional magnetic resonance imaging study in brachial plexus injury rats

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Neural Regeneration Research 2025年第5期20卷 1495-1504页

作者： Yunting Xiang Xiangxin xing Xuyun Hua Yuwen Zhang xin Xue Jiajia Wu Mouxiong zheng He Wang Jianguang Xu School of Rehabilitation Science Shanghai University of Traditional Chinese MedicineShanghaiChina Engineering Research Center of Traditional Chinese Medicine Intelligent Rehabilitation Ministry of EducationShanghaiChina Department of Rehabilitation Medicine Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghaiChina Department of Traumatology and Orthopedics Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghaiChina Institute of Science and Technology for Brain-Inspired Intelligence Fudan UniversityShanghaiChina Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence(Fudan University) Ministry of EducationShanghaiChina Human Phenome Institute Fudan UniversityShanghaiChina

Distinct brain remodeling has been found after different nerve reconstruction strategies,including motor representation of the affected ***,differences among reconstruction strategies at the brain network level have not been *** study aimed to explore intranetwork changes related to altered peripheral neural pathways after different nerve reconstruction surgeries,including nerve repair,endto-end nerve transfer,and end-to-side nerve ***–Dawley rats underwent complete left brachial plexus transection and were divided into four equal groups of eight:no nerve repair,grafted nerve repair,phrenic nerve end-to-end transfer,and end-to-side transfer with a graft sutured to the anterior upper ***-state brain functional magnetic resonance imaging was obtained 7 months after *** independent component analysis algorithm was utilized to identify group-level network components of interest and extract resting-state functional connectivity values of each voxel within the *** in intra-network resting-state functional connectivity were compared among the *** muscle reinnervation was assessed by behavioral observation(elbow flexion)and *** results showed that alterations in the sensorimotor and interoception networks were mostly related to changes in the peripheral neural *** repair was related to enhanced connectivity within the sensorimotor network,while end-to-side nerve transfer might be more beneficial for restoring control over the affected limb by the original motor *** thalamic-cortical pathway was enhanced within the interoception network after nerve repair and end-to-end nerve *** areas related to cognition and emotion were enhanced after end-to-side nerve *** study revealed important brain networks related to different nerve *** networks may be potential targets for enhancing motor recovery.

关键词： brain functional networks end-to-end nerve transfer end-to-side nerve transfer independent component analysis nerve repair peripheral plexus injury resting-state functional connectivity

Merging polymers of intrinsic microporosity and porous carbon-based zinc oxide composites in novel mixed matrix membranes for efficient gas separation

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Green Energy & Environment 2025年第1期10卷 203-213页

作者： Muning Chen Jiemei Zhou Jing Ma Weigang zheng Guanying Dong xin Li Zhihong Tian Yatao Zhang Jing Wang Yong Wang School of Chemical Engineering Zhengzhou UniversityZhengzhou450001HenanChina State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemical Engineering Nanjing Tech UniversityNanjing211816JiangsuChina Singapore Membrane Technology Centre Nanyang Environment and Water Research InstituteNanyang Technological UniversitySingapore637141Singapore Engineering Research Center for Nanomaterials Henan UniversityKaifeng475004HenanChina State Key Laboratory of Coking Coal Resources Green Exploitation Zhengzhou UniversityZhengzhou 450001China School of Energy and Environment Southeast UniversityNanjing210096JiangsuChina

Mixed matrix membranes(MMMs)have demonstrated significant promise in energy-intensive gas separations by amalgamating the unique properties of fillers with the facile processability of ***,achieving a simultaneous enhancement of permeability and selectivity remains a formidable challenge,due to the difficulty of achieving an optimal match between polymers and *** this study,we incorporate a porous carbon-based zinc oxide composite(C@ZnO)into high-permeability polymers of intrinsic microporosity(PIMs)to fabricate *** dipole–dipole interaction between C@ZnO and PIMs ensures their exceptional compatibility,mitigating the formation of non-selective voids in the resulting ***,C@ZnO with abundant interconnected pores can provide additional low-resistance pathways for gas transport in *** a result,the CO_(2) permeability of the optimized C@ZnO/PIM-1 MMMs is elevated to 13,215 barrer,while the CO_(2)/N_(2) and CO_(2)/CH4 selectivity reached 21.5 and 14.4,respectively,substantially surpassing the 2008 Robeson upper ***,molecular simulation results further corroborate that the augmented membrane gas selectivity is attributed to the superior CO_(2) affinity of C@*** summary,we believe that this work not only expands the application of MMMs for gas separation but also heralds a paradigm shift in the application of porous carbon materials.

关键词： Mixed matrix membranes Polymers of intrinsic microporosity CO_(2)separation Porous carbon materials

Synergistic promotion strategy of “dual-site” and “dual-path” to enhance the C–C coupling between CO2 and HCHO driven by photoelectrocatalysis

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Journal of Energy Chemistry 2025年第1期100卷 39-49页

作者： Hongqiang yang Jianfeng zheng Guoyu Wang Yifei Gao Yatao yang Jia Li Xiaojin Han yan Cui Zhanggen Huang National Key Laboratory of High Efficiency and Low Carbon Utilization of Coal Institute of Coal Chemistry Chinese Academy of Science University of Chinese Academy of Science Shenyang University of Chemical Technology

Photoelectrocatalytic coupling CO2and volatile organic compounds （VOCs） is a promising green strategy for the synergistic conversion of the two carbon-containing resources to *** catalytic efficiency is always at the mercy of chemical inertness of CO2and the competitive hydrogen evolution of ***,a modified g-C3N4/ZnAl-LDH Z-scheme heterojunction catalyst with dual reaction site was rationally designed and precisely *** Faraday efficiency of ethanol reached 68.67%with a corresponding formation rate of 227.3μmol *** revealed by in-situ characterizations and density functional theory calculations,CO2and HCHO were absorbed at Zn site and N site,***,*CO generated from CO2and HCHO was converted to*CH3O and*CHO on the dual-active-site *** detailed reaction mechanism experiments indicated that C–C coupling only occurred between*CO and*CH3O in electrocatalysis *** from the“*CO+*CH3O”path,another“*CO+*CHO”coupling path was also detected in photoelectrocatalytic *** selectivity of ethanol was significantly enhanced due to the synthesis of dual-site catalyst and the dual-path coupling path between CO2and HCHO simultaneously driven by light and electricity.

关键词： Ethanol

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冲击波引燃环氧丙烷物理特性模拟

西安科技大学学报 2008年第3期28卷 581-583,588页

作者：孟泉水常琳炎正馨西安科技大学理学院陕西西安710054

主要研究了入射冲击波引燃环氧丙烷后快速分解反应的物理特性。通过基本物理量的分析指出，环氧丙烷主要在高温（900～1300K）段发生快速分解反应，并伴随有大量反应热的释放。在反应时间（0．0～20．0μs）段后期（约5．0μs），反应... 详细信息

主要研究了入射冲击波引燃环氧丙烷后快速分解反应的物理特性。通过基本物理量的分析指出，环氧丙烷主要在高温（900～1300K）段发生快速分解反应，并伴随有大量反应热的释放。在反应时间（0．0～20．0μs）段后期（约5．0μs），反应混合物将形成一种更强烈的高温、高速及高压爆轰波。

关键词：环氧丙烷冲击波引燃激波速率

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用多种谱仪技术研究环氧丙烷点火的微观特性

光谱学与光谱分析 2006年第2期26卷 225-227页

作者：胡栋吴旌贺炎正馨刘锦超袁长迎李萍程新路孙珠妹中国工程物理研究院流体物理研究所冲击波物理与爆轰物理国家级重点实验室四川大学高温高压物理研究所北京科技大学北京100047

利用OMA(光多通道分析系统)谱仪和单色谱仪技术研究了环氧丙烷冲击点火的微观特性。OMA谱仪观察到O,CH2O,C2,CH,CH3O,CO2,H2O等许多中间产物和最终产物。利用三台单色谱仪和压力传感器确定环氧丙烷冲击点火后这些产物出现的顺序并确定... 详细信息

利用OMA(光多通道分析系统)谱仪和单色谱仪技术研究了环氧丙烷冲击点火的微观特性。OMA谱仪观察到O,CH2O,C2,CH,CH3O,CO2,H2O等许多中间产物和最终产物。利用三台单色谱仪和压力传感器确定环氧丙烷冲击点火后这些产物出现的顺序并确定了它们的点火延迟时间和临界条件。

关键词：光谱谱仪技术点火冲击

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脉间波形幅相联合设计抗欺骗干扰方法

电子科技大学学报 2021年第4期50卷 481-487页

作者：葛萌萌余显祥严正欣方学立崔国龙孔令讲电子科技大学信息与通信工程学院成都611731 复杂航空系统仿真重点实验室北京丰台区100076

欺骗干扰作为一种典型的有源干扰,在距离维或多普勒维上产生虚假目标,使雷达发生虚警,严重影响雷达正常工作。针对速度欺骗干扰,该文提出了一种基于脉间波形幅相联合设计的抗速度欺骗干扰方法。首先,根据速度欺骗干扰下的雷达回波模型,... 详细信息

欺骗干扰作为一种典型的有源干扰,在距离维或多普勒维上产生虚假目标,使雷达发生虚警,严重影响雷达正常工作。针对速度欺骗干扰,该文提出了一种基于脉间波形幅相联合设计的抗速度欺骗干扰方法。首先,根据速度欺骗干扰下的雷达回波模型,建立最小化阻带内干扰能量与目标旁瓣能量的加权和的优化准则,同时考虑离散量化相位和峰均功率比(PAR)约束,形成脉间幅相联合设计抗速度欺骗干扰的优化问题;然后,提出非精确交替方向惩罚法(IADPM)算法求解该优化问题,并分析算法的计算复杂度;最后,仿真实验分析验证了该算法的有效性。

关键词：干扰抑制 PAR约束速度欺骗干扰脉间波形设计

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高浓度气体共振光声光谱信号饱和特性研究

物理学报 2010年第10期59卷 6908-6913页

作者：袁长迎炎正馨蒙瑰李智慧尚丽平西南科技大学国防科技学院绵阳621010 西安科技大学能源学院西安710054 西南科技大学信息工程学院绵阳621010

采用恒流驱动耦合机械斩波技术在激光光声光谱装置上系统测量了5%—100%宽浓度范围甲烷气体的共振光声信号,发现在高浓度区共振光声信号呈现异常的饱和特征.基于气体吸收和光声光谱原理定量分析了光声信号饱和的主要原因及影响因素,研... 详细信息

采用恒流驱动耦合机械斩波技术在激光光声光谱装置上系统测量了5%—100%宽浓度范围甲烷气体的共振光声信号,发现在高浓度区共振光声信号呈现异常的饱和特征.基于气体吸收和光声光谱原理定量分析了光声信号饱和的主要原因及影响因素,研究表明,气体样本对入射光强吸收而导致的声源与本征共振模式的耦合系数改变是异常饱和的主要原因,并导出判定光声信号饱和深度的准则以用于判定高浓度气体饱和深度。

关键词：光声光谱信号饱和气体传感

河南省吉家洼金矿床构造控矿规律及深部成矿潜力预测

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地质调查与研究 2012年第4期35卷 247-252页

作者：颜正信河南省地矿局第一地质矿产调查院河南洛阳471000

吉家洼金矿为熊耳山地区隐伏-半隐伏陡倾斜的小型金矿床。经16年矿山开发,矿山资源面临严重危机。笔者通过吉家洼金矿浅中部金矿床控矿特征和成矿富集规律的系统研究,认为各矿体纵向上严格受断裂构造控制,横向上各断裂带在标高625～670 ... 详细信息

吉家洼金矿为熊耳山地区隐伏-半隐伏陡倾斜的小型金矿床。经16年矿山开发,矿山资源面临严重危机。笔者通过吉家洼金矿浅中部金矿床控矿特征和成矿富集规律的系统研究,认为各矿体纵向上严格受断裂构造控制,横向上各断裂带在标高625～670 m间相交复合成一条矿脉,通过深部资源潜力预测和少量深部工程验证,预计可获得金资源量3872 kg,表明吉家洼金矿深部具有较大找矿潜力,应及时开展深部找矿验证工作。这对熊耳山地区深部找矿及寻找隐伏-半隐伏矿具有重大指导意义。

关键词：成矿潜力预测构造控矿深部勘查吉家洼金矿河南省阅