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Highly Aligned Graphene Aerogels for Multifunctional Composites

Nano-Micro Letters 2024年第6期16卷 276-342页

作者： Ying Wu Chao An Yaru Guo Yangyang Zong naisheng jiang Qingbin Zheng Zhong‑Zhen Yu Beijing Advanced Innovation Center for Materials Genome Engineering School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083People’s Republic of China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang 110004People’s Republic of China School of Science and Engineering The Chinese University of Hong KongShenzhenShenzhenGuangdong 518172People’s Republic of China State Key Laboratory of Organic‑Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China

Stemming from the unique in-plane honeycomb lattice structure and the sp^(2)hybridized carbon atoms bonded by exceptionally strong carbon–carbon bonds,graphene exhibits remarkable anisotropic electrical,mechanical,and thermal properties.To maximize the utilization of graphene’s in-plane properties,pre-constructed and aligned structures,such as oriented aerogels,films,and fibers,have been designed.The unique combination of aligned structure,high surface area,excellent electrical conductivity,mechanical stability,thermal conductivity,and porous nature of highly aligned graphene aerogels allows for tailored and enhanced performance in specific directions,enabling advancements in diverse fields.This review provides a comprehensive overview of recent advances in highly aligned graphene aerogels and their composites.It highlights the fabrication methods of aligned graphene aerogels and the optimization of alignment which can be estimated both qualitatively and quantitatively.The oriented scaffolds endow graphene aerogels and their composites with anisotropic properties,showing enhanced electrical,mechanical,and thermal properties along the alignment at the sacrifice of the perpendicular direction.This review showcases remarkable properties and applications of aligned graphene aerogels and their composites,such as their suitability for electronics,environmental applications,thermal management,and energy storage.Challenges and potential opportunities are proposed to offer new insights into prospects of this material.

关键词： Highly aligned graphene aerogels Quantitative characterization of alignment Multifunctional composites Anisotropic properties Multifunctional applications

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Disturbance failure mechanism of highly stressed rock in deep excavation:Current status and prospects

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International Journal of Minerals,Metallurgy and Materials 2024年第4期31卷 611-627页

作者： Tao Wang Weiwei Ye Liyuan Liu Kai Liu naisheng jiang Xianhui Feng School of Civil and Resources Engineering University of Science and Technology BeijingBeijing 100083China Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mines University of Science and Technology BeijingBeijing 100083China Department of Engineering Science University of OxfordParks RoadOxford OX13PJUK School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China

This article reviews the current status on the dynamic behavior of highly stressed rocks under disturbances.Firstly,the experimental apparatus,methods,and theories related to the disturbance dynamics of deep,high-stress rock are reviewed,followed by the introduction of scholars’research on deep rock deformation and failure from an energy perspective.Subsequently,with a backdrop of highstress phenomena in deep hard rock,such as rock bursts and core disking,we delve into the current state of research on rock microstructure analysis and residual stresses from the perspective of studying the energy storage mechanisms in rocks.Thereafter,the current state of research on the mechanical response and the energy dissipation of highly stressed rock formations is briefly retrospected.Finally,the insufficient aspects in the current research on the disturbance and failure mechanisms in deep,highly stressed rock formations are summarized,and prospects for future research are provided.This work provides new avenues for the research on the mechanical response and damage-fracture mechanisms of rocks under high-stress conditions.

关键词： deep rock with high stress highly stressed rock rock failure residual stress energy release

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Residual stress measurement and analysis of siliceous slate-containing quartz veins

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International Journal of Minerals,Metallurgy and Materials 2023年第12期30卷 2310-2320页

作者： Tao Wang Weiwei Ye Yemeng Tong naisheng jiang Liyuan Liu School of Civil and Resources Engineering University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Strata Intelligent Control and Green Mining Co-founded by Shandong Province and the Ministry of Science and Technology Shandong University of Science and TechnologyQingdao 266590China

Engineering geological disasters such as rockburst have always been a critical factor affecting the safety of coal mine production.Thus,residual stress is considered a feasible method to explain these geomechanical phenomena.In this study,electron backscatter diffraction(EBSD)and optical microscopy were used to characterize the rock microcosm.A measuring area that met the requirements of X-ray diffraction(XRD)residual stress measurement was determined to account for the mechanism of rock residual stress.Then,the residual stress of a siliceous slate-containing quartz vein was measured and calculated using the sin^(2) ϕ method equipped with an X-ray diffractometer.Analysis of microscopic test results showed homogeneous areas with small particles within the millimeter range,meeting the requirements of XRD stress measurement statistics.Quartz was determined as the calibration mineral for slate samples containing quartz veins.The diffraction patterns of the(324)crystal plane were obtained under different ϕ and φ.The deviation direction of the diffraction peaks was consistent,indicating that the sample tested had residual stress.In addition,the principal residual stress within the quartz vein measured by XRD was compressive,ranging from 10 to 33 MPa.The maximum principal stress was parallel to the vein trend,whereas the minimum principal stress was perpendicular to the vein trend.Furthermore,the content of the low-angle boundary and twin boundary in the quartz veins was relatively high,which enhances the resistance of the rock mass to deformation and promotes the easy formation of strain concentrations,thereby resulting in residual stress.The proposed method for measuring residual stress can serve as a reference for subsequent observation and related research on residual stress in different types of rocks.

关键词： residual stress siliceous sand rock microstructure X-ray diffraction electron backscatter diffraction

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仿生皮脂脂质体OriginalSL^(TM)的开发与皮肤屏障修复效果评估

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香料香精化妆品 2024年第3期 155-162页

作者：孙静卢永杰耿林刘艳红张兵张炽坚罗莹姜乃生花安堂生物科技集团有限公司广东广州511400 北京科技大学材料科学与工程学院北京100083

旨在通过模拟人体皮肤细胞间脂质的组成和配比,开发一种仿生皮脂脂质体(OriginalSL^(TM))。该脂质体通过纳米包裹技术共包裹神经酰胺、胆固醇和白池花(Limnanthes alba)籽油,以模拟皮肤自然分泌的皮脂。结果表明,OriginalSL^(TM)为寡层... 详细信息

旨在通过模拟人体皮肤细胞间脂质的组成和配比,开发一种仿生皮脂脂质体(OriginalSL^(TM))。该脂质体通过纳米包裹技术共包裹神经酰胺、胆固醇和白池花(Limnanthes alba)籽油,以模拟皮肤自然分泌的皮脂。结果表明,OriginalSL^(TM)为寡层脂质结构,其平均粒径为(170.2±2.3)nm,PDI值为0.02,包封率为98.0%,且在体积分数≤2.5%时无明显细胞毒性,细胞安全性良好。在3D表皮皮肤模型中,相较于单一神经酰胺或白池花籽油脂质体,OriginalSL^(TM)具有更好的保湿和修复功效,具有良好的应用价值。

关键词：仿生皮脂皮肤屏障修复脂质体神经酰胺白池花(Limnanthes alba)籽油

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饲料铜锌减量对杜梅生长猪生长性能及粪便铜锌含量的影响

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饲料博览 2024年第2期 25-28,34页

作者：唐赛涌卞国顺姜琴芳赵羽丰夏东陆乃升姜雪元雷胡龙上海市嘉定区动物疫病预防控制中心上海201899 上海市农业科学院畜牧兽医研究所农业农村部畜禽资源(猪)评价利用重点实验室上海种猪工程技术研究中心上海201106 上海黑马饲料有限公司上海201808

为探讨饲料中铜锌减量对生长猪生长性能和粪便中铜锌含量的影响,试验将224头杜洛克×梅山二元生长猪随机分为对照组(基础日粮+60 mg·kg^(-1)铜+100 mg·kg^(-1)锌)和试验组(基础日粮+15 mg·kg^(-1)铜+50 mg·kg^(-1)锌),两组除日粮不... 详细信息

为探讨饲料中铜锌减量对生长猪生长性能和粪便中铜锌含量的影响,试验将224头杜洛克×梅山二元生长猪随机分为对照组(基础日粮+60 mg·kg^(-1)铜+100 mg·kg^(-1)锌)和试验组(基础日粮+15 mg·kg^(-1)铜+50 mg·kg^(-1)锌),两组除日粮不同外其他饲养管理条件完全相同,试验期为30天。结果表明,饲粮中铜锌减量对杜梅猪生长性能无显著影响(P>0.05),试验组粪便中铜含量较对照组降低了52.8%(P<0.01)、锌含量较对照组降低了40.7%(P<0.01)。因此,饲料中铜添加量从60 mg·kg^(-1)降低至15 mg·kg^(-1)、锌添加量从100 mg·kg^(-1)降低至50 mg·kg^(-1)不仅不会降低生长猪的生长性能,还能减少粪便铜锌的排泄量。

关键词：饲料铜锌减量生长性能铜锌排泄杜梅生长猪

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The constitutes and isomer distribution of di-(potassium sulfonate)-di-phthalimidomethyl phthalocyanine zinc

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Chinese Science Bulletin 2008年第11期53卷 1657-1664页

作者： WANG Jian LIU Hong XUE JinPing jiang Zhou CHEN naisheng HUANG JinLing Institute of Research on Functional Materials Department of Chemistry College of Chemistry and Chemical Engineering FuzhouUniversity Fuzhou 350002 China

Sulfonate and/or phthalimidomethyl phthalocyanine zincs are obtained by the condensation reaction of anhydrous zinc acetate and two precursors, i.e. 4-phthalimidomethyl phthalonitrile and 4-(potassium sulfonated) phthalonitrile. The ZnPcSnPm mixture was separated into 5 components according to the number of substituted sulfonate groups and each component which has the same chemical constituent consists of different regioisomers. An HPLC method in isocratic conditions was developed to exercise quality control and make quantitative analysis of the photosensitizer, di-(potassium sulfonate)-di-phthalimidomethyl phthalocyanine zinc (abbreviated as ZnPcS2P2, here, S represents sulfonate group, P the phthalimidomethyl group and ZnPc the phthalocyanine zinc). Furthermore, by comparing the retention behavior of ZnPcS2P2 with that of ZnPcS2, positional structure of isomers of ZnPcS2P2 was speculated. Reversed-phase HPLC method with TEA-phosphate buffer and DMF as eluents in gradient conditions has been proved to be a powerful tool for the separation of such complex system.

关键词：磺酸钾异构体苯二酰亚氨基甲基酞菁锌缩合反应

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Cross-shore suspended sediment flux in the salt marsh pioneer zone of Chongming eastern beach in the Chang- jiang Estuary in China

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Acta Oceanologica Sinica 2010年第6期29卷 62-72页

作者： WANG Chu YAO Dongjing HE Baogen ZHOU naisheng XU Shiyuan Department of Geography Shanghai Normal University Shanghai 200234 China Department of Geography College of Resource and Environmental Science East China Normal University Shanghai 200062 China

Between April 2002 and April 2003,in situ measurements of water depth,current velocity and suspended sediment content were carried out in edge region of East Chongming salt marsh and neighboring bald flat in the Changjiang （Yangtze） Estuary under different weather conditions.Cross-shore suspended sediment flux was calculated and analyzed.The results show that under calm weather conditions,the current velocity process in bald field and salt marsh area varied differently during semidiurnal tidal cycles.Owing to current velocity asymmetry,mean SSC during flood tide phase was 1.8 times higher than that of ebb tide phase.As a result,net onshore sediment flux controlled cross-shore suspended sediment transport process and salt marsh pioneer zone was generally accreting.There was significant positive correlation between total sediment flux and quartic power of maximum water depth.It indicates that tidal ranges dominate suspended sediment transport and sedimentation process in the salt marsh pioneer zone under the calm weather condition.The sedimentation rate on the adjacent mudflat was higher than the salt marsh,which induced stable accreting of salt marsh towards the sea.The wind events enhanced SSC and current velocity during the semidiurnal tides.And the remarkable onshore net sediment flux could occur on the high marsh and mudflat close to the marsh fringe during the short period under the rough weather condition.

关键词： current velocity suspended sediment content flux salt marsh eastern beach

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加载次序对沥青混合料疲劳损伤累积的影响

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材料导报 2023年第24期37卷 174-179页

作者：房辰泽郭乃胜蒋继望冷真李辉陆国阳王昊鹏大连海事大学交通运输工程学院辽宁大连116026 香港理工大学土木及环境工程学系中国香港九龙999077 东南大学交通学院南京210094 诺丁汉大学诺丁汉交通工程中心英国诺丁汉NG72RD

沥青混合料在变幅加载下的疲劳损伤累积过程具有明显的非线性特征,然而传统的线性损伤累积准则无法表征不同加载次序下的非线性疲劳损伤累积(NLFDA)。为研究加载次序对沥青混合料疲劳损伤累积的影响,首先开展恒幅加载疲劳试验,分析恒幅... 详细信息

沥青混合料在变幅加载下的疲劳损伤累积过程具有明显的非线性特征,然而传统的线性损伤累积准则无法表征不同加载次序下的非线性疲劳损伤累积(NLFDA)。为研究加载次序对沥青混合料疲劳损伤累积的影响,首先开展恒幅加载疲劳试验,分析恒幅加载下的疲劳损伤累积规律;其次借助变幅加载疲劳试验,分析变幅加载下的疲劳损伤累积规律;最后建立考虑加载次序的NLFDA模型,分析加载次序对沥青混合料疲劳损伤累积的影响。结果表明:恒幅加载下沥青混合料疲劳损伤发生非线性演化,但服从线性损伤累积准则,且累积寿命分数为1;变幅加载会导致疲劳损伤发生非线性演化,且服从非线性损伤累积准则,低-高和高-低加载次序的累积寿命分数分别大于1和小于1;建立的NLFDA模型可较为准确地表征沥青混合料疲劳损伤对加载次序的依赖性。

关键词：道路工程疲劳损伤累积加载次序沥青混合料

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我国医学科研人员对伦理审查的认知和态度分析

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中国医学伦理学 2022年第1期35卷 33-40页

作者：李闪闪张新庆蒋辉常乃升西安医学院马克思主义学院陕西西安710021 北京协和医学院人文和社会科学学院北京100730 福建医科大学附属漳州市医院科教科福建漳州363000

以一项全国性抽样调查数据为基础,描述并分析了中国医学科研人员对涉及人的生物医学研究伦理审查的了解情况、态度、行为、差异和影响因素。调查发现:具有硕士及以下学历、所在单位为科研院所/高校、无海外经历、处在中部地区、未担任... 详细信息

以一项全国性抽样调查数据为基础,描述并分析了中国医学科研人员对涉及人的生物医学研究伦理审查的了解情况、态度、行为、差异和影响因素。调查发现:具有硕士及以下学历、所在单位为科研院所/高校、无海外经历、处在中部地区、未担任伦理委员会委员的科研人员对“伦理审查”的了解情况相对较差;男性、年龄小、处在西部地区、对“伦理审查”越不了解的科研人员越认同“伦理审查消耗了科研人员太多的时间和精力”观点;担任伦理委员会委员的科研人员所参与的科研项目更可能未经过伦理审查程序等。基于以上实际,提出如下建议:全面普及伦理审查培训,侧重强化薄弱人群和地区;严格落实伦理审查法规,加强考评和监管;多方位提升伦理审查服务质量和效率。

关键词：医学科研人员伦理审查涉及人的生物医学研究伦理委员

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Selenium deficiency facilitates inflammation through the regulation of TLR4 and TLR4-related signaling pathways in the mice uterus

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畜牧与饲料科学 2015年第Z1期 362-363页

作者： ZHANG Zecai GAO Xuejiao GUO Mengyao jiang Haichao WANG Tiancheng SONG Xiaojing CAO Yongguo ZHANG naisheng College of Veterinary Medicine Jilin University

Selenium(Se) is an essential nutritional trace element that affects the development and function of the reproductive system.Endometritis is a reproductive obstacle disease that can seriously reduce the reproductive capacity of animal.To study the effects of dietary Se deficiency on LPS-induced mice endometritis,we generated a model of LPS-induced mice endometritis.The Se content in uterine tissues was detected by fluorescence spectrophotometry.The levels of TNF-α,IL-1β and IL-6 were measured by enzyme-linked immunosorbent assay(ELISA) and quantitative real-time polymerase chain reaction(qRT-PCR).The extent of phosphorylation of IκBα,NF-κB p65,ERK,JNK,p38 and the expression of Toll-like receptor 4(TLR4) were detected with western blots.The TLR4 mRNA was analyzed with qRT-PCR.The results indicated that dietary Se intake significantly influenced Se levels in uterine tissues.The Se-deficient mice model was successfully replicated,and Se deficiency exacerbated uterine tissue histopathology,increased the expression of TNF-α,IL-1β and IL-6,facilitated the activation of TLR4,and enhanced the phosphorylation of IκBα,p65,ERK,JNK,and p38 in LPS-induced mice endometritis,and the effects were inhibited by a supplement of Se.In conclusion,our studies demonstrated that Se deficiency makes mice uterus more prone to inflammation.An appropriate Se supplement could enhance the immune condition of the uterus.

关键词： selenium endometritis TLR4 inflammation signaling pathway

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