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Contact Angle Prediction Model for Underwater Oleophobic Surfaces Based on Multifractal Theory

中国炼油与石油化工:英文版 2023年第3期25卷 37-48页

作者： jiang huayi You Yanzhen Hu Juan Tian Dongmei Qi Hongyuan Sun Nana Liu Mei College of Petroleum Engineering Xi’an Shiyou UniversityXi’an 710065ShaanxiChina Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil&Gas Reservoirs Xi’an Shiyou UniversityXi’an 710065ShaanxiChina The Second Gas Production Plant Changqing Oilfield CompanyYulin 719000ShaanxiChina

Traditional microstructure scale parameters have difficulty describing the structure and distribution of a roughmaterial’s surface morphology comprehensively and quantitatively. This study constructs hydrophilic and underwateroleophobic surfaces based on polyvinylidene fluoride (PVDF) using a chemical modification method, and the fractaldimension and multifractal spectrum are used to quantitatively characterize the microscopic morphology. A new contactangle prediction model for underwater oleophobic surfaces is established. The results show that the fractal dimension ofthe PVDF surface first increases and then decreases with the reaction time. The uniformity characterized by the multifractalspectrum was generally consistent with scanning electron microscope observations. The contact angle of water droplets onthe PVDF surface is negatively correlated with the fractal dimension, and oil droplets in water are positively correlated.When the fractal dimension is 2.0975, the new contact angle prediction model has higher prediction accuracy. Themaximum and minimum relative deviations of the contact angle between the theoretical and measured data are 18.20%and 0.72%, respectively. For water ring transportation, the larger the fractal dimension and spectral width of the materialsurface, the smaller the absolute value of the spectral difference, the stronger the hydrophilic and oleophobic properties, andthe better the water ring transportation stability.

关键词： contact angle hydrophilic-oleophobic surface polyvinylidene fluoride multifractal prediction model

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Study on Quantitative Relationship between Surface Wettability and Frictional Coefficient of Liquid Flowing in a Turbulent Horizontal Pipe

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China Petroleum Processing & Petrochemical Technology 2017年第3期19卷 105-114页

作者： Jing Jiaqiang Qi Hongyuan jiang huayi Liang Aiguo Shi Jianying Wang Yulong Sun Nana Zhang Yixiang State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University Chengdu 610500 Oil&Gas Fire Protection Key Laboratory of Sichuan Province Chengdu 611731 College of Petroleum Engineering Xi’an Shiyou UniversityXi’an 710065 No.1 Production Plant of Xinjiang Oilfield Branch Company Karamay 834000 Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’an 710049

This paper had investigated the effects of surface wettability on the frictional resistance of turbulent horizontal flow for tap water in five pipes made of various materials and four kinds of liquids in a polytetrafluoroethylene(PTFE) pipe,with the same inner diameter of 14 mm. Pressure drops were measured under different flow rates through an experimental flow loop. The contact angles and adhesion work of liquids in contact with pipe surfaces were determined using a contact angle meter. Based on the dimension and regression analyses, two kinds of modified relationships between the frictional coefficient and the surface wettability were established according to the measured results corresponding to tap water in five pipes and four liquids in PTFE pipe. The experimental results show that the surface wettability has some influence on frictional coefficient of the studied liquids flowing in macroscale pipes, and the frictional coefficient decreases with the increase of the contact angle at the same Reynolds number. Meanwhile the effect of wettability on the hydrophobic surface is greater than that on the hydrophilic one. The frictional coefficients predicted by the modified formulas have verified to be in good agreement with the experimental values, the relative errors of which are within ±6% and ±3% for the tap water flowing in five different pipes and four kinds of liquids flowing in PTFE pipe, respectively.

关键词： wettability contact angle frictional coefficient adhesion work fluid mechanics turbulent flow

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傣药黑皮跌打乙酸乙酯萃取物的抗炎镇痛作用及急性毒性观察

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山东医药 2024年第17期64卷 38-42,47页

作者：藤丹王祖慧洪清莹刘帅蒋华夷杨锐何红平云南中医药大学中药学院云南省南药可持续利用重点实验室昆明650500

目的观察傣药黑皮跌打90%乙醇提取物(FPEE)乙酸乙酯萃取部位(FPEA)的抗炎镇痛作用及急性毒性。方法抗炎作用观察:ICR小鼠随机分为空白组、模型组、阳性对照组及FPEA低、中、高剂量组,阳性对照组给予地塞米松灌胃,FPEA低、中、高剂量组... 详细信息

目的观察傣药黑皮跌打90%乙醇提取物(FPEE)乙酸乙酯萃取部位(FPEA)的抗炎镇痛作用及急性毒性。方法抗炎作用观察:ICR小鼠随机分为空白组、模型组、阳性对照组及FPEA低、中、高剂量组,阳性对照组给予地塞米松灌胃,FPEA低、中、高剂量组分别给予FPEA 200、400、800 mg/kg灌胃,空白组、模型组给予等体积生理盐水灌胃,持续给药5 d。除空白组外,各组均通过右后足足跖皮下注射角叉菜胶水溶液致炎,于致炎后1、2、3、4、5、6 h测定各组小鼠右后足足容积,计算足肿胀度及足肿胀抑制率;ELISA法检测致炎6 h后小鼠血清白细胞介素1β(IL-1β)、IL-6及肿瘤坏死因子α(TNF-α)。ICR小鼠随机分为模型组、阳性对照组及FPEA低、中、高剂量组,给药方法同上。采用二甲苯诱导小鼠耳肿胀,计算小鼠耳肿胀度及耳肿胀抑制率。镇痛作用观察:ICR小鼠随机分为模型组、阳性对照组及FPEA低、中、高剂量组,除阳性对照药选用阿司匹林及元胡止痛片外,各组给药方式同上。腹腔注射冰醋酸观察小鼠30 min内扭体次数并计算疼痛抑制率;于末次给药后30、60、90、120 min,将小鼠置于恒温热板上,记录小鼠痛阈值。急性毒性观察:ICR小鼠随机分为空白组、FPEE组、FPEA组,雌雄各半。FPEE组、FPEA组分别采用2000 mg/kg FPEE、FPEA灌胃,空白组给予等体积生理盐水灌胃。记录小鼠14 d内体质量,观察结束后处死小鼠,计算心脏、肝脏、脾脏、肺、肾脏及胸腺器官指数。结果与模型组比较,阳性对照组致炎4、5、6 h后足肿胀度减轻,FPEA中、高剂量组致炎5、6 h后足肿胀度减轻(P均0.05)。模型组血清IL-1β、IL-6及TNF-α水平均高于空白组,阳性对照组及FPEA低、中、高剂量组血清IL-6、TNF-α水平低于模型组,阳性对照组及FPEA中、高剂量组血清IL-1β水平低于模型组(P均0.05)。阳性对照组及FPEA低、中、高剂量组扭体次数均少于模型组,FPEA低、中、高剂量组疼痛抑制率均小于阳性对照组(P均0.05)。结论FPEA具有较好的抗炎镇痛作用,且不显示急性毒性。

关键词：黑皮跌打乙酸乙酯部位抗炎镇痛急性毒性

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Surface wettability and flow properties of non-metallic pipes in laminar flow

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Chinese Journal of Chemical Engineering 2020年第3期28卷 636-642页

作者： Hongyuan Qi Aiguo Liang huayi jiang Jianying Shi Nana Sun Yulong Wang College of Petroleum Engineering Xi'an Shiyou UniversityXi'an 710065China Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil&Gas Reservoirs Xi'an Shiyou UniversityXi'an 710065China Karamay Hongshan Oilfield Co.Ltd. Karamay 834000China No.1 Production Plant Xinjiang Oilfield Branch CompanyKaramay 834000China

In this paper,three liquids flowing in five pipes with the same inner diameter of 14 mm were studied to determine the relationship between the surface wettability and flow properties in laminar flow(Re b 2000).This was motivated by oilfield observations of increased pressure drops in non-metallic pipes compared to those in metal pipes,which was contrary to expectations.A new expression for the frictional coefficient that considers the Reynolds number and contact angleθin laminar flow for non-metallic pipes was proposed based on the experimental results of single-phase flow using dimension and regression analyses.The solutions of the anomalous phenomenon were proposed from the perspectives of the pipe diameter,contact-angle difference,and the compatibility between flexible composite pipe and JLHW105 oil according to the new formula.The surprising finding was that the surface wettability could control the frictional resistance by the critical contact angle(39.9°)obtained at the same Reynolds number.If 0°bθ≤39.9°,the frictional coefficient increased as the contact angle increased.In contrast,if 39.9°bθb 180°,the frictional coefficient decreased with increasing contact angle.The influences of the pipe diameter and contactangle difference on the pressure drop difference of JLHW105 oil showed an inversely proportional relation.A series of materials and liquids were tested.The selection of pipe material for transporting a given fluid can be based on the contact angle,surface tension,and critical limit of the contact angle obtained.The research results are expected to provide some guidelines for the selection of the appropriate pipe material for a given set of fluids.

关键词： Wettability Contact angle Frictional coefficient Fluid mechanics Laminar flow Petroleum

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A piezoelectric-driven microneedle platform for skin disease therapy

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The Innovation 2024年第3期5卷 110-121页

作者： Ziyan Chen Xin Liu Zixi jiang huayi Wu Tao Yang Lanyuan Peng Lisha Wu Zhongling Luo Mi Zhang Juan Su Yan Tang Jinmao Li Yang Xie Han Shan Qibo Lin Xiuli Wang Xiang Chen Hanmin Peng Shuang Zhao Zeyu Chen Department of Dermatology Xiangya HospitalCentral South UniversityChangsha 410008China Furong Laboratory(Precision Medicine) Changsha 410008China National Engineering Research Center of Personalized Diagnostic and Therapeutic Technology Xiangya HospitalCentral South UniversityChangsha 410008China Hunan Engineering Research Center of Skin Health and Disease Xiangya HospitalCentral South UniversityChangsha 410008China Hunan Key Laboratory of Skin Cancer and Psoriasis Xiangya HospitalCentral South UniversityChangsha 410008China National Clinical Research Center of Geriatric Disorders Xiangya HospitalCentral South UniversityChangsha 410008China School of Mechanical and Electrical Engineering Central South UniversityChangsha 410083China Department of Dermatology Xijing HospitalThe Fourth Military Medical UniversityXi’anShaanxi 710000China State Key Laboratory of Mechanics and Control for Aerospace Structures Nanjing University of Aeronautics&AstronauticsNanjing 210016China Institute of Photomedicine Shanghai Skin Disease HospitalSchool of MedicineTongji UniversityShanghai 200443China

With over a million cases detected each year,skin disease is a global public health problem that diminishes the quality of life due to its difficulty to eradicate,propensity for recurrence,and potential for post-treatment scarring.Photodynamic therapy(PDT)is a treatment with minimal invasiveness or scarring and few side effects,making it well tolerated by patients.However,this treatment requires further research and development to improve its effective clinical use.Here,a piezoelectric-driven microneedle(PDMN)platform that achieves high efficiency,safety,and non-invasiveness for enhanced PDT is proposed.This platform induces deep tissue cavitation,increasing the level of protoporphyrin IX and significantly enhancing drug penetration.A clinical trial involving 25 patients with skin disease was conducted to investigate the timeliness and efficacy of PDMN-assisted PDT(PDMN-PDT).Our findings suggested that PDMN-PDT boosted treatment effectiveness and reduced the required incubation time and drug concentration by 25%and 50%,respectively,without any anesthesia compared to traditional PDT.These findings suggest that PDMN-PDT is a safe and minimally invasive approach for skin disease treatment,which may improve the therapeutic efficacy of topical medications and enable translation for future clinical applications.

关键词： needle anesthesia clinical

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Controllable chemical redox reactions to couple microbial degradation for organic contaminated sites remediation:A review

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Journal of Environmental Sciences 2024年第5期139卷 428-445页

作者： Bin Chen jiang Xu Lizhong Zhu College of Environmental and Resource Sciences Zhejiang UniversityHangzhou 310058China Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control Zhejiang UniversityHangzhou 310058China Zhejiang Agriculture&Forest University Lin'an 311300China

Global environmental concern over organic contaminated sites has been progressively conspicuous during the process of urbanization and industrial restructuring.While traditional physical or chemical remediation technologies may significantly destroy the soil structure and function,coupling moderate chemical degradation with microbial remediation becomes a potential way for the green,economic,and efficient remediation of contaminated sites.Hence,this work systematically elucidates why and how to couple chemical technology with microbial remediation,mainly focused on the controllable redox reactions of organic contaminants.The rational design of materials structure,selective generation of reactive oxygen species,and estimation of degradation pathway are described for chemical oxidation.Meanwhile,current progress on efficient and selective reductions of organic contaminants(i.e.,dechlorination,defluorination,-NO_(2) reduction)is introduced.Combined with the microbial remediation of contaminated sites,several consideration factors of how to couple chemical and microbial remediation are proposed based on both fundamental and practical points of view.This review will advance the understanding and development of chemical-microbial coupled remediation for organic contaminated sites.

关键词： Soil remediation Groundwater remediation Rational design Reactive species Environmental nanotechnology

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Response of ocean acidification to atmospheric carbon dioxide removal

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Journal of Environmental Sciences 2024年第6期140卷 79-90页

作者： Jiu jiang Long Cao Xiaoyu Jin Zechen Yu Han Zhang Jianjie Fu Guibin jiang School of Environment Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Key Laboratory of Geoscience Big Data and Deep Resources of Zhejiang Province School of Earth SciencesZhejiang UniversityHangzhou 310058China Zhejiang Climate Center Hangzhou 310052China

Artificial CO_(2)removal from the atmosphere(also referred to as negative CO_(2)emissions)has been proposed as a potential means to counteract anthropogenic climate change.Here we use an Earth system model to examine the response of ocean acidification to idealized atmospheric CO_(2)removal scenarios.In our simulations,atmospheric CO_(2)is assumed to increase at a rate of 1%per year to four times its pre-industrial value and then decreases to the pre-industrial level at a rate of 0.5%,1%,2%per year,respectively.Our results show that the annual mean state of surface ocean carbonate chemistry fields including hydrogen ion concentration([H^(+)]),pH and aragonite saturation state respond quickly to removal of atmospheric CO_(2).However,the change of seasonal cycle in carbonate chemistry lags behind the decline in atmospheric CO_(2).When CO_(2)returns to the pre-industrial level,over some parts of the ocean,relative to the pre-industrial state,the seasonal amplitude of carbonate chemistry fields is substantially larger.Simulation results also show that changes in deep ocean carbonate chemistry substantially lag behind atmospheric CO_(2)change.When CO_(2)returns to its pre-industrial value,the whole-ocean acidity measured by[H^(+)]is 15%-18%larger than the pre-industrial level,depending on the rate of CO_(2)decrease.Our study demonstrates that even if atmospheric CO_(2)can be lowered in the future as a result of net negative CO_(2)emissions,the recovery of some aspects of ocean acidification would take decades to centuries,which would have important implications for the resilience of marine ecosystems.

关键词： Carbon dioxide removal Net negative CO_(2)emission Ocean acidification Climate change Earth system modeling

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Progress in gut microbiota-host interaction

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Science China(Life Sciences) 2024年第5期67卷 851-853页

作者： Changtao jiang Department of Immunology School of Basic Medical SciencesNHC Key Laboratory of Medical ImmunologyPeking UniversityBeijing 100191China

Recently,the gut microbiota has been recognized as a novel endocrine organ in the human body.It produces various bioactive metabolites and participates in metabolic processes.In addition,the gut microbiota is involved in the metabolism of drugs and natural components,which in turn influences the effects of various oral medications.

关键词： metabolism drugs processes

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Aberrant protamination in sperm correlates to anomalous nuclear and cytoplasmic architectures in infertile males with sperm dysmorphology

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Asian Journal of Andrology 2024年第2期26卷 183-188页

作者： Huan jiang Chu-Jie Huang Department of Reproductive Endocrinology Longgang District Maternity&Child Healthcare Hospital of Shenzhen City(Longgang Maternity and Child Institute of Shantou University Medical College)Shenzhen 518172China Institute of Reproductive Immunology College of Life Science and TechnologyJinan UniversityGuangzhou 510632China

Aberrant sperm protamination is linked to sperm dysmorphology and nuclear chromatin condensation.Yet,its effects on sperm cytoplasmic maturation remain largely unexplored.The relationships of protamines,sperm morphology,DNA damage,and cytoplasmic remodeling were illustrated in this study to provide fresh perspectives on the mechanisms of male infertility.A total of 205 infertile males were allocated into 5 groups according to the percentage of spermatozoa exhibiting abnormal morphology within their samples.Sperm concentration,motility,abnormal sperm morphology,cytoplasmic droplets(CDs),and excess residual cytoplasm(ERC)were analyzed according to the World Health Organization manual(2010).Sperm nuclear vacuoles(NVs)were determined by propidium iodide(PI)staining.Sperm protamine expressions(P1 and P2)were detected by western blot.DNA damage was measured by acridine orange test(AOT)to calculate the proportion of sperm with single-strand DNA breaks(SSBs).Our data showed that sperm concentration and motility in infertile males significantly decreased with the severity of abnormal sperm morphology(both P<0.01).P1 level,P1/P2 ratio,and SSB rate increased with the severity of sperm dysmorphology,whilst the P2 level decreased(all P

关键词： abnormal sperm morphology excess residual cytoplasm male infertility protamines sperm DNA damage sperm nuclear vacuoles

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Highly homogeneous zero-index metamaterials make devices more compact and perform better

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Light(Science & Applications) 2024年第5期13卷 806-807页

作者： Wei-Xiang jiang State Key Laboratory of Milimeter Waves School of Information Science and EngineeringSoutheast University210096 NanjingChina

A highly homogeneous microwave zero-index metamaterial based on high-permittivity SrTiO3 ceramics is demonstrated to realize the small-aperture high-directivity antenna.Such a novel technique is a remarkable step forw... 详细信息

关键词： ceramics SrTiO3 Highly

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