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A functional hyperbranched binder enabling ultra-stable sulfur cathode for high-performance lithium-sulfur battery

Journal of Energy Chemistry 2020年第11期29卷 63-72页

作者： xiang luo Xianbo Lu Xiaodong Chen Ya Chen Chunyang Yu Dawei Su Guoxiu Wang Lifeng Cui School of Materials Science and Engineering Dongguan University of TechnologyDongguan 523808GuangdongChina Center for Clean Energy Technology School of Mathematical and Physical ScienceFaculty of ScienceUniversity of Technology SydneyNSW 2007Australia R&D Center Shanghai Kingfa Sci.&Tech.Co.Ltd.Shanghai 201714China Department of Applied Chemistry School of ScienceXi'an Jiaotong UniversityXi'an 710049ShaanxiChina School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China School of Chemistry&Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Binders are of vital importance in stabilizing the cathodes to enhance the cycling stability of lithiumsulfur(Li-S) batteries. However, conventional binders are typically confronted with the drawback of inability for adsorbing lithium polysulfide(Li PS), thus resulting in severe active material losing and rapid capacity fading. Herein, a novel water-soluble hyperbranched poly(amidoamine)(HPAA) binder with controllable hyperbranched molecular structure and abundant amino end groups for Li-S battery is designed and fabricated, which can improve efficient adsorption for Li PS and stability of the sulfur cathodes. Besides, the strong intermolecular hydrogen bonds in HPAA binder can contribute to the structural stability of S cathode and integration of the conductive paths. Therefore, the Li-S battery with this functional binder exhibits excellent cycle performance with a capacity retention of 91% after 200 cycles at 0.1 C.Even at a high sulfur loading of 5.3 mg cm-2, a specific capacity of 601 mA h g-1 can also be achieved.Density functional theory(DFT) calculation further demonstrates that the enhanced electrochemical stability derives from the high binding energy between amino groups and LiP S and the wide electrochemical window(6.87 e V) of HPAA molecule. Based on the above all, this functional polymer will lighten a new species of binders for eco-friendly sulfur cathodes and significantly promote the practical applications of high-performance Li-S batteries.

关键词： Functional binder Hyperbranched polymer Sulfur cathode Polysulfide adsorption Lithium-sulfur battery

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西安地区3~6岁儿童脚型分类及特征规律分析

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陕西科技大学学报 2024年第4期42卷 17-24页

作者：罗向东赵美荣张祥发杨美强威陕西科技大学设计与艺术学院陕西西安710021 杭州紫辰科技有限公司浙江杭州310026

针对当前市场童鞋设计不合理和缺乏儿童脚型理论研究参考问题,本研究首先使用三维足部扫描仪获取到3~6岁的52名男童和71名女童三维脚型数据,进行儿童脚型特点和差异的对比分析;其次,采用相关性分析和主成分分析将26组多维指标降维处理至... 详细信息

针对当前市场童鞋设计不合理和缺乏儿童脚型理论研究参考问题,本研究首先使用三维足部扫描仪获取到3~6岁的52名男童和71名女童三维脚型数据,进行儿童脚型特点和差异的对比分析;其次,采用相关性分析和主成分分析将26组多维指标降维处理至3个主成分:脚长因子、宽围因子和高度因子;然后,以提取的3个主成分作为分类标准进行H-K聚类分析,将儿童脚型分为3类:细瘦足、适中足、肥壮足,其中左脚细瘦足占比最多,右脚适中足占比最多;最后,将脚长尺寸标准化,发现儿童脚型存在显著的性别及左右脚差异.该研究结论可为童鞋设计和鞋楦三维数字化构建提供理论参考.

关键词： 3~6岁儿童脚型特征规律 H-K聚类分析脚型分类性别差异

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A review on phospholipids and their main applications in drug delivery systems

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Asian Journal of Pharmaceutical Sciences 2015年第2期10卷 81-98页

作者： Jing Li Xuling Wang Ting Zhang Chunling Wang Zhenjun Huang xiang luo Yihui Deng School of Pharmacy Shenyang Pharmaceutical UniversityNo.103Wenhua RoadShenyang 110016China

Phospholipids have the characteristics of excellent biocompatibility and a especial amphiphilicity.These unique properties make phospholipids most appropriate to be employed as important pharmaceutical excipients and they have a very wide range of applications in drug delivery systems.The aim of this review is to summarize phospholipids and some of their related applications in drug delivery systems,and highlight the relationship between the properties and applications,and the effect of the species of phospholipids on the efficiency of drug delivery.We refer to some relevant literatures,starting from the structures,main sources and properties of phospholipids to introduce their applications in drug delivery systems.The present article focuses on introducing five types of carriers based on phospholipids,including liposomes,intravenous lipid emulsions,micelles,drug-phospholipids complexes and cochleates.

关键词： Phospholipids Biocompatibility Amphiphilicity Drug delivery systems

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Study on the Preparation and Characterization of Glycyrrhizic Acid Liposomes

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Pharmacology & Pharmacy 2022年第6期13卷 199-211页

作者： Bing Wang xiang luo Jue Wang Yibao Jin Tiejie Wang Xiean Yu Guo Yin NMPA Key Laboratory for Bioequivalence Research of Generic Drug Evaluation Shenzhen Institute for Drug Control Shenzhen China

The purpose of this study was to prepare glycyrrhizic acid nanoliposomes and evaluate the encapsulation efficiency and other properties of glycyrrhizic acid nanoliposomes, which would provide a reference for further research on Glycyrrhizic Acid in the treatment of liver diseases. Firstly, the preparation conditions of glycyrrhizic acid liposomes were optimized by the orthogonal design method. Then, glycyrrhizic acid liposomes were prepared by ultrasonic-film dispersion method and the encapsulation efficiency was determined by the HPLC method. Finally, the properties of glycyrrhizic acid nanoliposomes were also studied. The results showed that the optimal preparation conditions of liposomes were as follows: the ratio of drug to lipid was 1:30;Lecithin: cholesterol = 1:1;Hydration medium: pure water;Ultrasonic time: 120 s. The encapsulation efficiency of liposomes was about 90%. The final liposomes were round and uniform in distribution, with an average particle size of about 50 nm and absolute zeta potential of −28.9 mV. In this study, glycyrrhizic acid liposomes were prepared and the optimal preparation conditions were optimized. The encapsulation efficiency of the liposomes under the optimized conditions was determined. The evaluation of the morphology, size, particle size and stability of the liposomes was completed.

关键词： Glycyrrhizic Acid Liposome Orthogonal Design Quality Evaluation

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基于模态分解的轴向通流共转腔流场特性分析

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推进技术 2024年第6期45卷 67-78页

作者：王嗣鹏王源鹤邬泽宇罗翔北京航空航天大学能源与动力工程学院北京102206 北京航空航天大学航空发动机研究院北京102206

为了深入理解高压压气机旋转盘腔内的流场特性,基于雷诺平均N-S方程对轴向通流共转盘腔进行非定常数值模拟。采用本征正交分解方法识别了流场的相干结构,并对比分析了不同浮升力参数、罗斯比数以及盘轴旋转比下模态空间结构和平均流场... 详细信息

为了深入理解高压压气机旋转盘腔内的流场特性,基于雷诺平均N-S方程对轴向通流共转盘腔进行非定常数值模拟。采用本征正交分解方法识别了流场的相干结构,并对比分析了不同浮升力参数、罗斯比数以及盘轴旋转比下模态空间结构和平均流场的变化规律。结果表明,盘腔高半径处观察到一对非定常大尺度气旋/反转环流,借助本征正交分解方法能够有效提取其运动状态。低阶的旋进驱动模态主要反映了大尺度流动结构的旋进状态,对应盘腔内流场在整个径向范围的主频成分;高阶的谐振诱导模态则主要反映了腔内相干结构诱导的复杂涡系,对应主频的高阶倍频成分。气旋/反转环流结构的相干性随浮升力参数增加而增强(旋进驱动模态能量占比提高23.2%),随罗斯比数增加而减弱(相应能量占比降低12.3%)。盘轴反转会削弱低半径区域的环形涡,而对高半径区域流场影响较小。

关键词：压气机旋转盘腔轴向通流本征正交分解非定常浮升力罗斯比数

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揿针围攻法联合穴位艾灸对下肢动脉硬化闭塞症患者疼痛的影响

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河南中医 2024年第2期44卷 300-305页

作者：林周美罗翔罗绍芳兴国县人民医院江西兴国342400

目的:观察揿针围攻法联合穴位艾灸对下肢动脉硬化闭塞症(lower limb arteriosclerosis obliterans,LLASO)患者疼痛的影响。方法:选取2020年10月至2022年9月兴国县人民医院诊治的LLASO患者66例,按照随机数字表法法分为观察组和对照组各3... 详细信息

目的:观察揿针围攻法联合穴位艾灸对下肢动脉硬化闭塞症(lower limb arteriosclerosis obliterans,LLASO)患者疼痛的影响。方法:选取2020年10月至2022年9月兴国县人民医院诊治的LLASO患者66例,按照随机数字表法法分为观察组和对照组各33例。两组患者均给予常规治疗,观察组另给予揿针围攻法联合穴位艾灸治疗。观察两组患者治疗前后疼痛视觉模拟评分(visual analogue score,VAS)、疼痛持续时间、焦虑自评量表(self-rating anxiety scale,SAS)评分、同型半胱氨酸(homocysteine,Hcy)、踝肱指数(ankle brachial index,ABI)、证候积分、小腿和足趾皮温变化情况及临床疗效。结果:观察组有效率为66.67%,对照组有效率为93.94%,观察组有效率高于对照组,差异有统计学意义(P<0.05);观察组治疗后VAS评分、SAS评分均低于对照组,患肢疼痛持续时间短于对照组,差异有统计学意义(P<0.05);观察组治疗后Hcy水平低于对照组,ABI、小腿皮温及足趾皮温高于对照组,差异具有统计学意义(P<0.05);观察组治疗后证候积分均低于对照组,差异具有统计学意义(P<0.05)。结论:揿针围攻法联合穴位艾灸能减轻LLASO患者疼痛,减少疼痛持续时间,改善下肢血液循环、焦虑情绪,提高ABI、小腿皮温、足趾皮温。

关键词：下肢动脉硬化闭塞症揿针围攻法穴位艾灸疼痛踝肱指数皮温

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Kinetic and thermodynamic investigations of CO2 gasification of coal chars prepared via conventional and microwave pyrolysis

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International Journal of Coal Science & Technology 2020年第3期7卷 422-432页

作者： Peng Jiang Yang Meng Ziyao Lu Lan Xu Gang Yang xiang luo Kaiqi Shi Tao Wu Department of Chemical and Environmental Engineering The University of Nottingham Ningbo ChinaNingbo315100China Key Laboratory for Carbonaceous Wastes Processing and Process Intensification Research of Zhejiang Province The University of Nottingham Ningbo ChinaNingbo315100China

This study examined an isothermal CO2 gasification of four chars prepared via two different methods,i.e.,conventional and microwave-assisted pyrolysis,by the approach of thermogravimetric analysis.Physical,chemical,and structural behaviours of chars were examined using ultimate analysis,X-ray diffraction,and scanning electronic microscopy.Kinetic parameters were calculated by applying the shrinking unreacted core(SCM)and random pore(RPM)models.Moreover,char-CO2 gasification was further simulated by using Aspen Plus to investigate thermodynamic performances in terms of syngas composition and cold gas efficiency(CGE).The microwave-induced char has the largest C/H mass ratio and most ordered carbon structure,but the smallest gasification reactivity.Kinetic analysis indicates that the RPM is better for describing both gasification conversion and reaction rates of the studied chars,and the activation energies and pre-exponential factors varied in the range of 78.45–194.72 kJ/mol and 3.15–102,231.99 s−1,respectively.In addition,a compensation effect was noted during gasification.Finally,the microwave-derived char exhibits better thermodynamic performances than the conventional chars,with the highest CGE and CO molar concentration of 1.30%and 86.18%,respectively.Increasing the pyrolysis temperature,gasification temperature,and CO2-to-carbon molar ratio improved the CGE.

关键词： Coal char CO2 gasification Microwave pyrolysis Char properties Kinetics Thermodynamic

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Phyto-phospholipid complexes(phytosomes): A novel strategy to improve the bioavailability of active constituents

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Asian Journal of Pharmaceutical Sciences 2019年第3期14卷 265-274页

作者： Mei Lu Qiujun Qiu xiang luo Xinrong Liu Jing Sun Cunyang Wang xiangyun Lin Yihui Deng Yanzhi Song College of Pharmacy Shenyang Pharmaceutical UniversityShenyang110016China College of Pharmaceutical Engineering Shenyang Pharmaceutical UniversityShenyang110016China

Although active constituents extracted from plants show robust in vitro pharmacological effects, low in vivo absorption greatly limits the widespread application of these compounds. A strategy of using phyto-phospholipid complexes represents a promising approach to increase the oral bioavailability of active constituents, which is consist of ‘‘label-friendly'phospholipids and active constituents. Hydrogen bond interactions between active constituents and phospholipids enable phospholipid complexes as an integral part. This review provides an update on four important issues related to phyto-phospholipid complexes: active constituents, phospholipids, solvents, and stoichiometric ratios. We also discuss recent progress in research on the preparation, characterization, structural verification, and increased bioavailability of phyto-phospholipid complexes.

关键词： Phyto-phospholipid complexes Active constituents Hydrogen bonds Bioavailability

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Effect of Kupffer cells depletion on ABC phenomenon induced by Kupffer cells-targeted liposomes

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Asian Journal of Pharmaceutical Sciences 2019年第4期14卷 455-464页

作者： Chaoyang Lai Cong Li Mengyang Liu Qiujun Qiu xiang luo Xinrong Liu Ling Hu Yihui Deng Yanzhi Song Shenyang Pharmaceutical University

Accelerated blood clearance(ABC) phenomenon is common in many PEGylated nanocarriers, whose mechanism has not been completely elucidated yet. In this study, the correlation between Kupffer cells(KCs) and ABC phenomenon has been studied by KCs-targeted liposomes inducing ABC phenomenon and KCs depletion. In other words, the 4-aminophenyl-α-D-mannopyranoside(APM) lipid derivative DSPE-PEG 2000-APM(DPM), and 4-aminophenyl-β-L-fucopyranoside(APF) lipid derivative DSPE-PEG 2000-APF(DPF) were conjugated and modified on alendronate sodium(AD) liposomes to specifically target and deplete KCs. The dualligand modified PEGylated liposomes(MFPL) showed stronger ability to damage KCs in vitro and in vivo, which also could indirectly illustrate that dual-ligand modification could better target KCs. Besides, the hepatic biodistribution and pharmacokinetics could directly prove that MFPL had a stronger targeting ability to KCs. In addition, in depletion rats, plasma concentration and splenic biodistribution of MFPL and PEGylated liposomes(PL) were significantly elevated and hepatic biodistribution was significantly reduced, which demonstrated that KCs played an important role on elimination of nanoparticles. What’s more, ABC phenomenon of the secondary injection of PL was stronger in KCs depletion rats than that in normal rats, which indicated that depletion of KCs prolonged the circulation of PL in the first injection repeatedly stimulating B-cells in the marginal region of the spleen and causing it to secrete more IgM antibodies. This could also illustrate that anti-PEG IgM takes up a major station compared with KCs. Most important of all, KCs-targeted liposomes could induce a stronger ABC phenomenon than PL in normal rats, which declared that based on the same IgM concentration, the more the KCs were stimulated, the stronger ABC phenomenon was induced. However, in depletion rats, this difference of ABC phenomenon between PL and MFPL could no more exist, further demonstrating that KCs could participate and play a certain role

关键词： Accelerated blood clearance (ABC) phenomenon Kupffer cells Depletion Liposomes Bio-distribution

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Cortical and Subcortical Grey Matter Abnormalities in White Matter Hyperintensities and Subsequent Cognitive Impairment

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Neuroscience Bulletin 2021年第6期37卷 789-803页

作者： Wenhao Zhu Hao Huang Shiqi Yang xiang luo Wenzhen Zhu Shabei Xu Qi Meng Chengchao Zuo Yong Liu Wei Wang Alzheimer’s Disease Neuroimaging Initiative Department of Neurology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department of Radiology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Brainnetome Center and National Laboratory of Pattern Recognition Institute of AutomationChinese Academy of SciencesBeijing 100190China School of Artificial Intelligence Beijing University of Posts and TelecommunicationsBeijing 100876China University of the Chinese Academy of Sciences Beijing 100049China 不详

Grey matter(GM)alterations may contribute to cognitive decline in individuals with white matter hyperintensities(WMH)but no consensus has yet emerged.Here,we investigated cortical thickness and grey matter volume in 23 WMH patients with mild cognitive impairment(WMH-MCI),43 WMH patients without cognitive impairment,and 55 healthy controls.Both WMH groups showed GM atrophy in the bilateral thalamus,fronto-insular cortices,and several parietal-temporal regions,and the WMH-MCI group showed more extensive and severe GM atrophy.The GM atrophy in the thalamus and fronto-insular cortices was associated with cognitive decline in the WMH-MCI patients and may mediate the relationship between WMH and cognition in WMH patients.Furthermore,the main results were well replicated in an independent dataset from the Alzheimer's Disease Neuroimaging Initiative database and in other control analyses.These comprehensive results provide robust evidence of specific GM alterations underlying WMH and subsequent cognitive impairment.

关键词： White matter hyperintensities Cognitive impairment Cortical thickness Grey matter volume Replication

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