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Research on thermal insulation materials properties under HTHP conditions for deep oil and gas reservoir rock ITP-Coring

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Petroleum science 2024年第4期21卷 2625-2637页

作者： Zhi-Qiang He He-Ping Xie Ling Chen Jian-Ping Yang Bo Yu Zi-Jie Wei Ming-Zhong Gao State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering College of Water Resource and Hydropower Sichuan University Guangdong Provincial Key Laboratory of Deep Earth sciences and Geothermal Energy Exploitation and Utilization Institute of Deep Earth Sciences and Green Energy College of Civil and Transportation Engineering Shenzhen University School of Mechanical Engineering Sichuan University College of Polymer science and Engineering Sichuan University

Deep oil and gas reservoirs are under high-temperature conditions, but traditional coring methods do not consider temperature-preserved measures and ignore the influence of temperature on rock porosity and permeability, resulting in distorted resource assessments. The development of in situ temperaturepreserved coring(ITP-Coring) technology for deep reservoir rock is urgent, and thermal insulation materials are key. Therefore, hollow glass microsphere/epoxy resin thermal insulation materials(HGM/EP materials) were proposed as thermal insulation materials. The materials properties under coupled hightemperature and high-pressure(HTHP) conditions were tested. The results indicated that high pressures led to HGM destruction and that the materials water absorption significantly increased; additionally,increasing temperature accelerated the process. High temperatures directly caused the thermal conductivity of the materials to increase; additionally, the thermal conduction and convection of water caused by high pressures led to an exponential increase in the thermal conductivity. High temperatures weakened the matrix, and high pressures destroyed the HGM, which resulted in a decrease in the tensile mechanical properties of the materials. The materials entered the high elastic state at 150.C, and the mechanical properties were weakened more obviously, while the pressure led to a significant effect when the water absorption was above 10%. Meanwhile, the tensile strength/strain were 13.62 MPa/1.3%and 6.09 MPa/0.86% at 100.C and 100 MPa, respectively, which meet the application requirements of the self-designed coring device. Finally, K46-f40 and K46-f50 HGM/EP materials were proven to be suitable for ITP-Coring under coupled conditions below 100.C and 100 MPa. To further improve the materials properties, the interface layer and EP matrix should be optimized. The results can provide references for the optimization and engineering application of materials and thus technical su

关键词： Deep oil and gas reservoir rock In situ temperature-preserved coring (ITP-Coring) Hollow glass microsphere/epoxy resin thermal insulation materials (HGM/EP materials) High-temperature and high-pressure (HTHP) Physical and mechanical properties

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High-performance piezoresistive sensors based on transfer-free large-area PdSe_(2) films for human motion and health care monitoring

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InfoMat 2024年第1期6卷 139-149页

作者： Rui Zhang Jie Lin Tao He Jiafang Wu Zhuojun Yang Liwen Liu Shaofeng Wen Yimin Gong Haifeng Lv Jing Zhang Yi Yin Fangjia Li Changyong Lan Chun Li State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengduthe People's Republic of China School of Physics University of Electronic Science and Technology of ChinaChengduthe People's Republic of China sichuan Academy of Medical sciences and sichuan People's Hospital Chengduthe People's Republic of China School of Medicine University of Electronic Science and Technology of ChinaChengduthe People's Republic of China

Two-dimensional transition metal dichalcogenides(TMDs)are needed in highperformance piezoresistive sensors due to their strong strain-induced bandgap modification and thereby large gauge ***,integrating a conventional high-temperature chemical vapor deposition(CVD)-grown TMD with a flexible substrate necessitates a transfer process that inevitably degrades the sensing properties of the TMDs and increases the overall fabrication *** present a high-performance piezoresistive strain sensor that employs largearea PdSe_(2) films grown directly on polyimide(PI)substrates via plasma-assisted selenization of a sputtered Pd *** reliable strain transfer from the substrate to the PdSe_(2) film ensures an outstanding strain-sensing capability of the ***,the sensors have a gauge factor of up to315±2.1,a response time under 25 ms,a detection limit of 8×10^(-6),and an exceptional stability of over 104 loadingunloading *** attaching the sensors to the skin surface,we demonstrate their application for measuring physiological parameters in health care monitoring,including motion,voice,and arterial pulse ***,using the PdSe_(2) film sensor combined with deep learning technology,we achieved intelligent recognition of artery temperature from arterial pulse signals with only a 2%difference between predicted and actual *** excellent sensing performance,together with the advantages of low-temperature fabrication and simple device structure,make the PdSe_(2) film sensor promising for wearable electronics and health care sensing systems.

关键词： layered crystal PdSe_(2) piezoresistive effect strain sensor

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View of thermodynamic phase transition of the charged Gauss-Bonnet AdS black hole via the shadow

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Chinese Physics B 2024年第4期33卷 355-362页

作者：何柯腱郭森罗智李国平 College of Physics Chongqing UniversityChongqing 401331China Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and TechnologyGuangxi UniversityNanning 530004China School of Physics and Astronomy China West Normal UniversityNanchong 637000China

We examine thermodynamic phase transition(PT)of the charged Gauss-Bonnet Ad S black hole(BH)by utilizing the shadow *** this system,we rescale the corresponding Gauss-Bonnet coefficientαby a factor of 1/(D-4),and ensure thatαis positive to avoid any singularity *** equation derived for the shadow radius indicates that it increases as the event horizon radius increases,making it an independent variable for determining BH *** investigating the PT curve in relation to shadows,we can observe that the shadow radius can be used as an alternative to the event horizon radius in explaining the phenomenon of BH ***,the results indicate that an increase in the parameterαcorresponds to a decrease in the temperature of the *** utilizing the relationship between the temperature and the shadow radius,it is possible to obtain the thermal profile of the Gauss-Bonnet AdS *** is evident that there is an N-type variation in temperature for pressures P

关键词： Gauss-Bonnet AdS black hole thermodynamic shadow

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Coordination structure regulation in non-flammable electrolyte enabling high voltage lithium electrochemistry

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Journal of Energy Chemistry 2024年第9期96卷 282-290页

作者： Zhiwen Deng Ye Jia Yan Deng Changhaoyue Xu Xuemei Zhang Qiujie He Jianan Peng Hao Wu Wenlong Cai College of Materials science and Engineering Sichuan UniversityChengdu 610064SichuanChina Engineering Research Center of Alternative Energy Materials and Devices Sichuan UniversityChengdu 610064SichuanChina

High-voltage battery systems bring significant increases in energy density but are also accompanied by fast degradation of electrochemical performance and serious safety ***,Li^(+)coordination structure regulation was conducted to formulate a non-flammable electrolyte,which consists of 1.5 M lithium bis(fluor sulfonyl)imide(LiFSI)in triethyl phosphate and methyl 2,2,2-trifluoromethyl carbonate(FEMC).The renamed TEP-FEMC-FEC(TFF)electrolyte exhibits an FSI^(−)-dominated solvation structure contributed by the weakly-solvating ability of *** generated inorganic-rich interfacial layers are conducive to stabilizing the phase transition of high-voltage cathodes while suppressing the dendritic growth on lithium metal or co-intercalation behavior in graphite *** TFF electrolyte enables LiCoO_(2)||Li batteries to achieve capacity maintenance over 79%after 400 cycles with high-rate of 5 C at an ultra-high voltage of 4.6 V,and an outstanding capacity exceeding 100 mA h g^(−1)even at a super-high current density of 20 ***,the Ah-level LiCoO_(2)||graphite pouch cells also exhibit high capacity retention and satisfactory safety performance even under fast *** work provides a novel research direction for the pursuit of high energy density non-flammable electrolytes.

关键词： Non-flammable Solvation structure High-voltage Lithium batteries

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Transcriptomic analysis identifies the neuropeptide cortistatin (CORT) as an inhibitor of temozolomide (TMZ) resistance by suppressing the NF-kB-MGMT signaling axis in human glioma

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Genes & Diseases 2024年第3期11卷 385-399页

作者： Zongze He Bo Peng Qi Wang Jie Tian Ping Liu Jie Feng Yiwei Liao Longyi Chen Ping Jia Jian Tang Department of Neurosurgery Sichuan Provincial People's HospitalUniversity of Electronic Science and Technology of ChinaChengduSichuan 610072China Department of Rehabilitation Medicine Sichuan Provincial People's HospitalUniversity of Electronic Science and Technology of ChinaChengduSichuan 610072China Department of Neurosurgery Xiangya HospitalCentral South UniversityChangshaHunan 410008China

Glioma is a common tumor originating in the brain that has a high mortality ***(TMZ)is the first-line treatment for high-grade ***,a large pro-portion of gliomas are resistant to TMZ,posing a great challenge to their *** the study,the specific functions and mechanism(s)by which cortistatin(CORT)regulates TMZ resis-tance and glioma progression were *** decreased expression of CoRT was detected in glioma tissues,and highly expressed CORT was associated with a better survival rate in pa-tients with *** overexpression notably decreased the capacity of glioma cells to pro-liferate and migrate in vitro and to form tumors in *** overexpression also markedly suppressed the viability and enhanced the apoptosis of TMZ-resistant U251 cells by regulating MGMT,p21,and Puma ***,CORT overexpression reduced the resistance of gliomas to TMZ in *** expression Was negatively correlated with MGMT expression in both glioma tissues and cells,and it was found that CORT inhibited NF-kB pathway activation in glioma cells,thereby inhibiting MGMT *** conclusion,CORT regulates glioma cell growth,migration,apoptosis,and TMZ resistance by weakening the activity of NF-kB/p65 and thereby regulating MGMT *** CORT/NF-kB/MGMT axis might be regarded as a molecular mechanism contributing to the resistance of glioma to *** data also suggest that CORT regulates the viability and metastatic potential of glioma cells,independent of its effects on TMZ resistance,providing evidence of novel therapeutic targets for glioma that should be evaluated infurther studies.

关键词： Cortistatin Glioma MGMT NF-kB pathway Temozolomide

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3D‑Printed Carbon‑Based Conformal Electromagnetic Interference Shielding Module for Integrated Electronics

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Nano-Micro Letters 2024年第5期16卷 87-101页

作者： Shaohong Shi Yuheng Jiang Hao Ren Siwen Deng Jianping Sun Fangchao Cheng Jingjing Jing Yinghong Chen State Key Laboratory of Featured Metal Materials and Life‑Cycle Safety for Composite Structures School of ResourcesEnvironment and MaterialsGuangxi UniversityNo.100Daxuedong RoadNanning 530004People’s Republic of China State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan UniversitySichuan UniversityNo.24 South Section 1Yihuan RoadChengdu 610065People’s Republic of China

Electromagnetic interference shielding(EMI SE)modules are the core com-ponent of modern ***,the tra-ditional metal-based SE modules always take up indispensable three-dimensional space inside electronics,posing a major obstacle to the integra-tion of *** innovation of integrating 3D-printed conformal shielding(c-SE)modules with packaging materials onto core electronics offers infinite possibilities to satisfy ideal SE func-tion without occupying additional ***,the 3D printable carbon-based inks with various proportions of graphene and carbon nanotube nanoparticles are well-formulated by manipulating their rheological ***,the free-constructed architectures with arbitrarily-customized structure and multifunctionality are created via 3D *** particular,the SE performance of 3D-printed frame is up to 61.4 dB,simultaneously accompanied with an ultralight architecture of 0.076 g cm^(-3) and a superhigh specific shielding of 802.4 dB cm3 g^(-1).Moreover,as a proof-of-concept,the 3D-printed c-SE module is in situ integrated into core electronics,successfully replacing the traditional metal-based module to afford multiple functions for electromagnetic compatibility and thermal ***,this scientific innovation completely makes up the blank for assembling carbon-based c-SE modules and sheds a brilliant light on developing the next generation of high-performance shielding materials with arbitrarily-customized structure for integrated electronics.

关键词： 3D printing Carbon-based nanoparticles Conformal electromagnetic interference shielding Integrated electronics

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Two-stage Scheduling for Island CPHH IES Considering Plateau Climate

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CSEE Journal of Power and Energy Systems 2024年第4期10卷 1775-1786页

作者： Yuchen Pu Qi Li Yibin Qiu Xueli Zou Weirong Chen School of Electrical Engineering Southwest Jiaotong UniversityChengdu 611756China

In this paper,an island integrated energy system(IES)combining power,heat and hydrogen(CPHH)is built,and optimal power-heat-hydrogen scheduling is studied under actual plateau meteorological *** the comprehensive demands of residents,an IES including renewable energy sources(RESs),fuel cell,electrolyzer,electric boiler,thermal energy storage device and new energy vehicles is established and *** the first stage of operation,according to the prediction of RESs and demands,day-ahead optimization is carried out which aims to minimize operation cost,while electric vehicles(EVs)are considered as special demand response(DR)*** the second stage of operation,ultra-short-term prediction is implemented to provide prediction data for model predictive control(MPC),realizing real-time *** as a CPHH system,the fuel cell and electrolyzer collaborate to meet various needs of the plateau residential area with high *** addition,the method and IES structure proposed in this paper is compared with other options.

关键词： CPHH feul cell hydrogen island IES scheduling

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Harnessing the potential of hydrogels for advanced therapeutic applications: current achievements and future directions

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Signal Transduction and Targeted Therapy 2024年第8期9卷 3176-3241页

作者： Pelin Lu Dongxue Ruan Meiqi Huang Mi Tian Kangshun Zhu Ziqi Gan Zecong Xiao Nanomedicine Research Center The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhou 510630PR China Department of Minimally Invasive Interventional Radiology and Laboratory of Interventional RadiologyThe Second Affiliated Hospital of Guangzhou Medical UniversityGuangzhou 510260PR China State Key Laboratory of Respiratory Disease National Clinical Research Center for Respiratory DiseaseNational Center for Respiratory MedicineDepartment of Respiratory and Critical Care MedicineGuangzhou Institute for Respiratory HealthThe First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou 510120PR China Department of Stomatology Chengdu Second People's HospitalChengdu 610021PR China Hospital of Stomatology Guangdong Provincial Key Laboratory of StomatologyGuanghua School of StomatologySun Yat-sen UniversityGuangzhou 510055PR China

The applications of hydrogels have expanded significantly due to their versatile,highly tunable properties and breakthroughs in biomaterial *** this review,we cover the major achievements and the potential of hydrogels in therapeutic applications,focusing primarily on two areas:emerging cell-based therapies and promising non-cell therapeutic *** the context of cell therapy,we discuss the capacity of hydrogels to overcome the existing translational challenges faced by mainstream cell therapy paradigms,provide a detailed discussion on the advantages and principal design considerations of hydrogels for boosting the efficacy of cell therapy,as well as list specific examples of their applications in different disease *** then explore the potential of hydrogels in drug delivery,physical intervention therapies,and other non-cell therapeutic areas(e.g.,bioadhesives,artificial tissues,and biosensors),emphasizing their utility beyond mere delivery ***,we complement our discussion on the latest progress and challenges in the clinical application of hydrogels and outline future research directions,particularly in terms of integration with advanced biomanufacturing *** review aims to present a comprehensive view and critical insights into the design and selection of hydrogels for both cell therapy and noncell therapies,tailored to meet the therapeutic requirements of diverse diseases and situations.

关键词： directions overcome breakthrough

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Microbiome-friendly PS/PVP electrospun fibrous membrane with antibiofilm properties for dental engineering

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Regenerative Biomaterials 2024年第4期3卷 27-37页

作者： Jiamin Chen Jia Guo Xueyun Lu Derong Yin Cuisong Zhou Yuqing Li Xuedong Zhou State Key Laboratory of Oral Diseases National Clinical Research Center for Oral DiseasesDepartment of Operative Dentistry and EndodonticsWest China Hospital of StomatologySichuan UniversityChengduSichuan610041China Stomatological Hospital affiliated Suzhou Vocational Health College Department of Operative Dentistry and EndodonticsSuzhou215000China College of Chemistry Sichuan UniversityChengduSichuan610064China

Dental caries is one of the most prevalent and biofilm-associated oral diseases in *** mutans,with a high ability to form biofilms by adhering to hard surfaces,has been established as an important etiological agent for dental ***,it is crucial to find a way to prevent the formation of cariogenic ***,we report an electrospun fibrous membrane that could inhibit the adhesion and biofilm formation of ***,the polystyrene(PS)/polyvinyl pyrrolidone(PVP)electrospun fibrous membrane altered the 3D biofilm architecture and decreased water-insoluble extracellular polysaccharide ***,the anti-adhesion mechanism which laid in Coulomb repulsion between the negatively charged PS/PVP electrospun fibrous membrane and *** was detected by zeta ***,metagenomics sequencing analysis and CCK-8 assay indicated that PS/PVP electrospun fibrous membrane was microbiome-friendly and displayed no influence on the cell viability of human gingival epithelial cells and human oral ***,an in vitro simulation experiment demonstrated that PS/PVP electrospun fibrous membrane could decrease colony-forming unit counts of *** effectively,and PS/PVP electrospun fibrous membrane carrying calcium fluoride displayed better anti-adhesion ability than that of PS/PVP electrospun fibrous membrane ***,this research showed that the PS/PVP electrospun fibrous membrane has potential applications in controlling and preventing dental caries.

关键词： Streptococcus mutans PS/PVP electrospun fibrous membrane biofilm(s) anti-adhesion Coulomb repulsion

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Transition metals for stabilizing lithium metal anode:advances and perspectives

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Tungsten 2024年第1期6卷 212-229页

作者： Si-Cheng Miao Ye Jia Zhi-Wen Deng Yan Deng Ruo-Xuan Chen Xue-Mei Zhang Chang-Haoyue Xu Meng Yao Wen-Long Cai Department of Advanced Energy Materials College of Materials Science and EngineeringSichuan UniversityChengdu 610064China

As the capacity of lithium-ion batteries gradually reaches its limit,the high-capacity characteristics of lithium metal batteries(LMBs)make them one of the most promising electrochemical energy storage devices ***,uncontrolled lithium dendrite growth can cause poor cell performance and severe safety issues,seriously slowing down the commercialization of *** metals(TMs)are lithiophilic materials that effectively stabilize lithium metal anode(LMA)and inhibit dendrite ***,the growth of lithium dendrites and the performance of TMs in stabilizing lithium metals are comprehensively discussed in this ***,we elucidated the formation mechanisms of lithium dendrite,and we put forward several strategies to suppress lithium dendrite formation based on the understanding of these ***,the application of TMs and their compounds to stabilize LMA and their corresponding mechanisms are comprehensively ***,further research perspectives of TMs in stabilizing LMA are emphasized in detail.

关键词： Transition metals Lithium metal batteries Lithium dendrite Solid electrolyte interphase Formation mechanism

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