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Chinese Journal of Polymer Science 2018年第1期36卷 98-105页

作者： tian-qi wang Yang Xu Zi-Dong He Ming-Hong Zhou Kun Huang School of Chemistry and Molecular Engineering East China Normal University

We report a synthesis of microporous organic nanotube networks（MONNs） by a combination of hyper cross-linking and molecular templating of core-shell bottlebrush copolymers. The intrabrush and interbrush cross-linking of polystyrene（PS） shell layer in the core-shell bottlebrush copolymers led to the formation of micropores and large-sized nanopores（meso/macrospores） in MONNs, respectively, while selective removal of polylactide（PLA） core layer generated mesoporous tubular structure. The size of PLA-templated mesoporous cores and porous structure both at micro-and meso-scale could be controlled by simple tuning of the ratio of core/shell or the PLA core fraction in the bottlebrush precursors. Moreover, the resultant MONNs showed a highly selective adsorption capacity for the positively charged dyes on the basis of multi-porosity and carboxylate group-rich structure. In addition, MONNs also exhibited effective performance in size-selective adsorption of biomacromolecules. This work represents a new avenue for the preparation of MONNs and also provides a new application for molecular bottlebrushes in nanotechnology.

关键词： Microporous organic nanotube networks Hyper cross-linking Core-shell bottlebrush copolymers Meso/Macrospores Selective adsorption capacity

Predictive methods for density and refractive index of naphthenic lubricating oils during solvent extraction process

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Petroleum Science 2023年第3期20卷 1934-1946页

作者： Xiao-Ling Xu tian-qi wang Guang-Huai Chen Jun-Wei Hou Yan-Sheng Liu State Key Laboratory of Heavy Oil Processing China University of Petroleum(Bejing)at KaramayKaramayXinjiang834000China State Key Laboratory of Heavy oil Processing China University of Petroleum(Bejing)Bejing102200China

Lubricating oils are usually produced by solvent extraction to separate aromatics in order to achieve the desired specifications and better quality *** the different properties of lubricating oils,density and refractive index are some of the most important properties which can both be used for petroleum fluid *** of density and refractive index for naphthenic oils during solvent extraction by DMSO obtained by the pseudo-component approach and the quadratic correlation were both *** pseudo-component approach is a method to predict density and refractive index from composition while the latter merely relates density to refractive *** indicated that the predictions yielded by the pseudo-component method were in good agreement with experimental data for naphthenic *** the use of a function of refractive index(FRI_(20))as a pseudo-component property remarkably improved n_(20)predictions for the naphthenic ***,the density and refractive index predictions obtained by the quadratic correlation exhibited significantly higher de-viations for naphthenic oils than those for paraffinic *** a new modified correlation of the same functional form was proposed for naphthenic *** modification significantly improved predictions for naphthenic oils,which presented similar accuracy as the pseudo-component *** the previous correlation was still used for paraffinic ***,effect of temperature on density and refractive index of naphthenic oils was *** showed that the modified quadratic correlation was accurate for describing the relationship between density and refractive index of naphthenic oils at 20-90℃.The temperature dependence of density and refractive index for the raffinates and the extracts could be accurately described by the thermal coefficients for saturates and aromatics,*** the refractive index variation of the extracts with temperature,the

关键词： Density Refractive index Pseudo-components Paraffinic lubricating oils Naphthenic lubricating oils Solvent extraction

Heavy ion-induced single event upset sensitivity evaluation of 3D integrated static random access memory

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Nuclear Science and Techniques 2018年第3期29卷 31-41页

作者： Xue-Bing Cao Li-Yi Xiao Ming-Xue Huo tian-qi wang Shan-Shan Liu Chun-Hua qi An-Long Li Jin-Xiang wang Microelectronics Center Harbin Institute of TechnologyHarbin 150001China Harbin Institute of Technology Shenzhen Graduate School Shenzhen 518055China Research Center of Basic Space Science Harbin Institute of TechnologyHarbin 150001China

Heavy ion-induced single event upsets(SEUs)of static random access memory(SRAM), integrated with three-dimensional integrated circuit technology, are evaluated using a Monte Carlo simulation method based on the Geant4 simulation toolkit. The SEU cross sections and multiple cell upset(MCU) susceptibility of 3D SRAM are explored using different types and energies of heavy *** the simulations, the sensitivities of different dies of 3D SRAM show noticeable discrepancies for low linear energy transfers(LETs). The average percentage of MCUs of 3D SRAM increases from 17.2 to 32.95%, followed by the energy of ^(209)Bi decreasing from 71.77 to 38.28 MeV/u. For a specific LET, the percentage of MCUs presents a notable difference between the face-to-face and back-toface structures. In the back-to-face structure, the percentage of MCUs increases with a deeper die, compared with the face-to-face structure. The simulation method and process are verified by comparing the SEU cross sections of planar SRAM with experimental data. The upset cross sections of the planar process and 3D integrated SRAM are analyzed. The results demonstrate that the 3D SRAM sensitivity is not greater than that of the planar SRAM. The 3D process technology has the potential to be applied to the aerospace and military fields.

关键词： 3D integration Single event upset (SEU) Multiple cell upset (MCU) Monte Carlo simulation

CoFe_(2)O_(4) decorated graphene/C_(18)-functionalized mesoporous silica nanocomposites prepared for magnetic enrichment and electrochemical detection of promethazine in beef

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Chinese Chemical Letters 2024年第3期35卷 208-213页

作者： Xingdong Yang Shi-Ming Ying Sen Zhang Jinxia Dai Wei Gao tian-qi wang Jun-qin qiao Hong-Zhen Lian Li Mao State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry&Chemical Engineering and Centre of Materials AnalysisNanjing UniversityNanjing 210023China Ministry of Education(MOE)Key Laboratory of Modern Toxicology School of Public HealthNanjing Medical UniversityNanjing 211166China

Promethazine(PHZ)is used as a sedative in veterinary medicine,and its residue can threaten the health of *** electrochemical detection of PHZ is suitable method for application in the ***,the traditional electroanalysis is difficult to perform directly in meat samples due to matrix *** work integrates magnetic solid-phase extraction and differential pulse voltammetry for highly sensitive and selective determination of PHZ in beef and beef liver for the first ***_(2)O_(4)/graphene coated with C_(18)-functionalized mesoporous silica(MG@mSiO_(2)-C_(18))is synthesized as dispersed magnetic adsorbent to extract *** glassy carbon electrode modified with nitrogen-doped hollow carbon microspheres(HCM)attracts the MG@mSiO_(2)-C_(18)with PHZ,and directly detects the PHZ without elution ***@mSiO_(2)-C_(18)can separate PHZ to avoid the interference of impurities on following detection,and also concentrate PHZ on magnetic ***,the electrode modification with HCM can amplify the electrochemical signal of ***,the integrated PHZ determination method exhibits a wide linear range from 0.08μmol/L to 300μmol/L with a low limit of detection of 9.8 nmol/*** beef sample analysis presents excellent recovery,demonstrating that this protocol is promising for the rapid and onsite detection of PHZ in real meat samples。

关键词： Promethazine(PHZ) Drug residue Magnetic solid phase extraction Electrochemical detection Beef

Study on RF Excited Waveguide CO2 Laser with Two Different Channels

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Chinese Journal of Lasers 1999年第6期8卷 3-5页

作者： tian Zhaoshuo wang qi WAN Yusan LIU Fengmei (National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001, China) 哈尔滨工业大学可调谐（气体）激光技术国防科技重点实验室黑龙江哈尔滨 150001 哈尔滨工业大学可调谐（气体）激光技术国防科技重点实验室黑龙江哈尔滨

In this paper a waveguide CO 2 laser with two unequal long channels excited by radio frequency (RF) is presented. The volume is 2.25×2.25×400 mm 3 for the long channel and 2.25×2.25×200 mm 3 for the short waveguid... 详细信息

关键词： two unequal long channels RF excited waveguide CO 2 laser

Numerical analysis of the influence of a river on tunnelling-induced ground deformation in soft soil

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2022年第7期23卷 564-578页

作者： Jia-xin LIANG Xiao-wu TANG tian-qi wang Yu-hang YE Ying-jing LIU Research Center of Coastal and Urban Geotechnical Engineering Department of Civil EngineeringZhejiang UniversityHangzhou310058China Engineering Research Center of Urban Underground Space Development of Zhejiang Province Hangzhou310058China Zhongtian Construction Group Co. Ltd.Hangzhou310020China

When tunnels are constructed in coastal cities,they will inevitably undercross a *** the influence of rivers on tunnelling-induced deformation in costal soft soil is of great significance for controlling excessive settlement and protecting surrounding *** paper presents a case study of twin tunnels undercrossing a river in soft soil in Hangzhou,*** soft soil of Hangzhou refers to cohesive soil in a soft plastic or fluid plastic state with high natural water content,high compressibility,low bearing capacity,and low shear *** the influence of the river,the research region was divided into two parts,inside and outside the river-affected area,based on monitoring data of the Zizhi *** development law of surface settlement is divided into three *** the first and second stages,the surface settlement within and outside the river-affected area showed a similar trend:the settlement increased and the growth rate of settlement in the second stage was smaller within the river-affected *** the third stage,the surface settlement continued to increase within the river-affected area,while it converged outside the river-affected *** the river-affected area,there was an asynchronization of the sinking rate and stability of vault settlements and surface settlements.A numerical model was established by simulating different reinforcements of the *** numerical model revealed that the ground movement is influenced by the distribution and amount of the excess pore water *** excess pore pressure was concentrated mostly in the range of 1.0H_(t)-3.0H_(t)(H_(t) is the tunnel height)before the tunnel face,especially within the river-affected *** the river-affected area,the dissipation of excess pore water pressure needs more time,leading to slow stabilization of surface *** undercrossing a river,a cofferdam is necessary to reduce excessive ground deformation by dispersing the distribution o

关键词： Tunnelling Ground deformation Numerical analysis Reinforcement

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聚醋酸乙烯酯乳液的制备及表面性能研究

表面技术 2018年第5期47卷 182-187页

作者：刘天琪王博渤海大学化学化工学院辽宁锦州121007

目的制备性能优良的聚醋酸乙烯酯乳液。方法采用醋酸乙烯单体(VAc),通过乳液聚合的方法制备了聚醋酸乙烯酯乳液。对制备的乳液进行了固含量、黏度、吸水率等性能检测,考察了分散剂聚乙烯醇(PVA)的用量、引发剂过硫酸铵的用量、乳化剂OP... 详细信息

目的制备性能优良的聚醋酸乙烯酯乳液。方法采用醋酸乙烯单体(VAc),通过乳液聚合的方法制备了聚醋酸乙烯酯乳液。对制备的乳液进行了固含量、黏度、吸水率等性能检测,考察了分散剂聚乙烯醇(PVA)的用量、引发剂过硫酸铵的用量、乳化剂OP-10的用量、反应初始温度对乳液性能的影响。结果聚乙烯醇(PVA)、过硫酸铵、OP-10乳化剂用量以及反应初始温度的不同对乳液的制备和性能都有不同的影响。反应初始温度70℃,聚乙烯醇用量为单体的8.8%、OP-10用量为单体质量的1.7%和过硫酸铵用量为单体质量的0.2%时,所制备的聚醋酸乙烯酯乳液的性能最好。结论在聚醋酸乙烯酯乳液聚合过程中,需要控制聚乙烯醇、OP-10和过硫酸铵的用量。

关键词：聚醋酸乙烯酯聚乙烯醇(PVA) 过硫酸铵乳化剂

Effect of titanium-substituted Keggin-type polyoxometalates on photoconductivity of TiO2/POM nanocomposite: towards enhanced gas sensing

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Effect of titanium-substituted Keggin-type polyoxometalates ...

新结构气液相并流鼓泡塔式反应器流动特性与CFD模拟

第十五届全国光化学学术讨论会

作者： Hong-Yu Shi Lin Xu Zhi-Xia Sun tian-qi wang Key Laboratory of Polyoxometalates Science of Ministry of Education College of ChemistryNortheast Normal University

Photoconductivity of semiconducting materials mainly depends on the free carrier concentrations which rest with the competition between the photogenerated excess carriers and the charge recombination, while the photoconductive materials can increase the electrical conductivity by the absorption of photons. In this work, we investigated the photoconductive properties of TiO/polyoxometalates(POMs) composites with different POMs including H[PWO], K[PWTiO] and K7[PWTiO](denoted as PW, PWTi and PWTi, respectively). These TiO/POMs nanocomposites exhibited considerable photoconductivity enhancements in compared with TiO, while TiO/PW displayed much higher photoconductivity. In addition, we fabricated the TiO/POMs nanocomposite devices to detect acetone gas. The TiO/PWTi device exhibited a higher sensitivity than others at acetone gas concentration of 50 ppm, while TiO-PW could be sensitive to acetone gas until 300 ppm.

关键词： photoconductivity titanium dioxide polyoxometalates gas sensing

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高校化学工程学报 2016年第5期30卷 1088-1094页

作者：刘天奇王嘉骏冯连芳化学工程联合国家重点实验室(浙江大学) 浙江大学化学工程与生物工程学院浙江杭州310027

构建了一种新型结构的气液相并流多级鼓泡塔式反应器,具有单层液相混合均匀、轴向返混小的特点,适用于慢反应以及对传质要求较高的情况。采用基于双流体欧拉模型的计算流体力学方法,能够准确模拟反应器内部的气液两相流动特性、液相混... 详细信息

构建了一种新型结构的气液相并流多级鼓泡塔式反应器,具有单层液相混合均匀、轴向返混小的特点,适用于慢反应以及对传质要求较高的情况。采用基于双流体欧拉模型的计算流体力学方法,能够准确模拟反应器内部的气液两相流动特性、液相混合特性与停留时间分布特性,与冷态模拟实验结果相符。此反应器在宽泛的操作范围内均能正常运作,整塔气液并行流动稳定;塔板压降较低,维持在0.2 KPa左右;多釜串联虚拟级数在3-3.4。

关键词：计算流体力学鼓泡塔停留时间分布流体动力学多相流

Staged dendrite suppression for high safe and stable lithium-sulfur batteries

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Journal of Energy Chemistry 2025年第1期100卷 674-683页

作者： Jun Jiang Zhenjie Lu Yanwen Ding Shujun Liu Zhijie qi tian Tang Yunfan Zhang Zhiyuan Ma Jingwen Sun Liang Xue Wenyao Zhang Pan Xiong Xin wang Junwu Zhu Yongsheng Fu Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education Nanjing University of Science and Technology Jiangsu Pylon Battery Co.Ltd

The unavoidable dendrite growth and shuttle effect have long been stranglehold challenges limiting the safety and practicality of lithium-sulfur ***,we propose a dual-action strategy to address the lithium dendrite issue in stages by constructing a multifunctional surface-negatively-charged nanodiamond layer with high ductility and robust puncture resistance on polypropylene （PP） *** uniformly loaded compact negative layer can not only significantly enhance electron transmission efficiency and promote uniform lithium deposition,but also reduce the formation of dendrite during early deposition *** importantly,under the strong puncture stress encountered during the deterioration of lithium dendrite growth under limiting current,the high ductility and robust puncture resistance（145.88 MPa） of as-obtained nanodiamond layer can effectively prevent short circuits caused by unavoidable lithium *** Li||Li symmetrical cells assembled with nanodiamond layer modified PP demonstrated a stable cycle of over 1000 h at 2 mA cm-2with a polarization voltage of only 29.3 ***,the negative charged layer serves as a physical barrier blocking lithium polysulfide ions,effectively mitigating capacity *** improved cells achieved a capacity decay of only 0.042%per cycle after 700 cycles at 3 C,demonstrating effective suppression of dendrite growth and capacity attenuation,showing promising prospect.

关键词： Lithium-sulfur batteries Staged dendrite suppression Shuttle effect Surface-negatively-charged nanodiamond