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TiO_(2) nanoparticle supported Ru catalyst for chemical upcycling of polyethylene terephthalate to alkanes

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Nano Research 2023年第10期16卷 12223-12229页

作者： Rongxiang Li Wei Zeng Runyao Zhao Yanfei Zhao Yuepeng Wang Fengtao Zhang Minhao Tang Ying Wang Xiaoqian Chang fengtian wu Zhimin Liu Beijing National Laboratory for Molecular Science Key Laboratory of Colloid and Interface and Thermodynamics DepartmentCAS Research/Education Center for Excellence in Molecular ScienceInstitute of chemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices Jiangxi Province Key Laboratory of Synthetic ChemistryEast China University of TechnologyNanchang 330013China

Production of fuel and chemicals from plastic waste is one of the effective ways to upcycle spent plastics,which is an interesting topic and of significance for green and sustainable development.Herein,we demonstrate a highly efficient catalyst,TiO_(2)nanoparticle supported Ru nanocatalyst(Ru/TiO_(2)),for upcycling polyethylene terephthalate(PET)to alkanes in the presence of H_(2) and water.Under the optimal conditions(200℃,60 bar H_(2),and small amount of H_(2)O),PET could completely convert into alkanes,dominated with cyclohexane and methane.It was indicated that the strong interaction between the TiO_(2)support and Ru nanoparticles made electrons flow from the TiO_(2)support to the Ru nanoparticles,which thus rendered Ru/TiO_(2)to have ability to simultaneously catalyze PET hydrolysis and intermediate hydrogenation.This work realizes the transformation of PET to alkanes,which provides a promising way to chemically upcycle PET.

关键词： upcycling of polyethylene terephthalate(PET) Ru/TiO_(2) hydrolysis hydrodeoxidation

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不同机翼面积的分布式电推进飞机方案设计

飞行力学 2024年第2期42卷 7-12,21页

作者：吴江高峰李胜文杨凤田辽宁通用航空研究院辽宁沈阳110136 沈阳飞机设计研究所辽宁沈阳110035 航空工业空气动力研究院辽宁沈阳110034

为了明确不同机翼面积分布式电推进飞机设计方案的优劣,分别建立了相对常规布局飞机减小机翼面积进行巡航和起降多目标优化设计和机翼面积与常规布局飞机一致开展巡航性能单目标优化设计的流程;以某4座全电飞机为平台,开展了分布式电推... 详细信息

为了明确不同机翼面积分布式电推进飞机设计方案的优劣,分别建立了相对常规布局飞机减小机翼面积进行巡航和起降多目标优化设计和机翼面积与常规布局飞机一致开展巡航性能单目标优化设计的流程;以某4座全电飞机为平台,开展了分布式电推进飞机的方案设计。仿真结果表明,相比于常规布局飞机,机翼面积不变的分布式电推进飞机设计方案巡航升阻比高、性能好。本研究对分布式电推进飞机的方案设计具有一定的参考价值。

关键词：分布式电推进飞机机翼面积性能分析

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辉铜矿催化合成双吲哚甲烷性能及反应机理

东华理工大学学报（自然科学版） 2024年第3期47卷 279-285页

作者：吴丰田郭泽伟安文滢崔文杉刘月吕薇谢宗波东华理工大学江西省合成化学重点实验室江西南昌330013 东华理工大学江西省聚合物微纳制造与器件重点实验室江西南昌330013

针对双吲哚甲烷合成尚存在释放有害物质、需贵金属作为催化剂等问题,研究了“辉铜矿/过氧化氢”耦合体系催化N甲基吲哚与N,N二甲基乙酰胺反应,实现双吲哚甲烷绿色合成新方法。经对铜矿种类、氧化剂类型等影响反应因素进行筛选,得到合适... 详细信息

针对双吲哚甲烷合成尚存在释放有害物质、需贵金属作为催化剂等问题,研究了“辉铜矿/过氧化氢”耦合体系催化N甲基吲哚与N,N二甲基乙酰胺反应,实现双吲哚甲烷绿色合成新方法。经对铜矿种类、氧化剂类型等影响反应因素进行筛选,得到合适反应条件为:N甲基吲哚0.5 mmol、N,N二甲基乙酰胺1.0 mL、辉铜矿20 mg、30%过氧化氢1.0 mmol、反应温度140℃、反应时间4 h。在此条件下,催化剂可循环使用6次而不失活性,并得到9种3,3’二N烷基取代吲哚甲烷,产率为82%~95%。根据控制实验结果与相关文献,提出了N,N二甲基乙酰胺经单电子转移,并与N甲基吲哚进行亲电反应的机理。该方法为双吲哚甲烷类物质绿色合成提供理论基础及技术支撑。

关键词：辉铜矿 N甲基吲哚 N,N二甲基乙酰胺过氧化氢

Quantitative Analysis of Methanol in Methanol Gasoline by Calibration Transfer Strategy Based on Kernel Domain Adaptive Partial Least Squares(kda-PLS)

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Chemical Research in Chinese Universities 2022年第4期38卷 1057-1064页

作者： XU Yanyan LI Maogang FENG Ting JIAO Long wu fengtian ZHANG Tianlong TANG Hongsheng LI Hua Northwest University Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of EducationCollege of Chemistry&Materials ScienceXi’an710127P.R.China College of Chemistry and Chemical Engineering Xi’an Shiyou UniversityXi’an710065P.R.China

The application of near-infrared(NIR)spectroscopy combined with multivariate calibration methods can achieve the rapid analysis of methanol gasoline.However,instrumental or environmental differences found for spectra make it impossible to continuously apply the previously developed calibration model.Therefore,the calibration transfer technique would be required to solve the time-consuming and laborious problem of reestablishing a new model.In this work,a calibration transfer method named kernel domain adaptive partial least squares(kda-PLS)was applied to the calibration transfer from the primary instrument to the secondary ones.Firstly,wavelet transform(WT)and variable importance in projection(VIP)were employed to enhance the predictive performance of the kda-PLS transfer model.Then,the results found for the calibration transfer by piecewise direct standardization(PDS)and domain adaptive partial least squares(da-PLS)were compared to verify the calibration transfer(CT)effect of kda-PLS.The results point that the kda-PLS method can transfer the PLS model developed on the primary instrument to the secondary ones,and achieve results comparable to the those of reestablishing a new PLS model on the secondary instrument,with R_(P)^(2)=0.9979(R_(P)^(2):coefficients of determination of the prediction set),RMSEP=0.0040(RMSEP:root mean square error of the prediction set),and MREP=3.03%(MREP:mean relative error of the prediction set).Therefore,kda-PLS will provide a new method for quantitative analysis of methanol content in methanol gasoline.

关键词： Kernel domain adaptive partial least squares(kda-PLS) Calibration transfer Methanol gasoline Near infrared spectroscopy

Regulation of pathological BBB restoration via nanostructured ROS-responsive glycolipid-like copolymer entrapping siVEGF for glioblastoma targeted therapeutics

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Nano Research 2022年第2期15卷 1455-1465页

作者： Lijuan Wen Yu Peng Kai Wang Zhihua Huang Shiying He Ruiwen Xiong Longping wu fengtian Zhang Fuqiang Hu National Engineering Research Center for Modernization of Tranditional Chinese Medicine-Hakka Medical Resources Branch College oj PharmacyGannan Medical UniversityGanzhou 341000China College of Pharmaceutical Sciences Zhejiang UniversityHangzhou 310058China Department of Orthopedics First Affiliated Hospital of Gannan Medical UniversityGanzhou 341000China Department of Orthopedics Second Affiliated Hospital of Soochow UniversitySuzhou 215004China Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases of Ministry of Education Gannan Medical UniversityGanzhou 341000China

Glioblastoma(GBM)is one of the malignant brain tumors with high mortality and no curative treatments.Abnormally elevated vascular endothelial growth factor(VEGF)in GBM seriously disrupts the blood brain barrier(BBB)with an increased permeability,resulting in poor outcome and prognosis.RNAi interference has shown strong potential to inhibit VEGF expression,thus it is necessary to development an effective and safe gene delivery system possessing the ability to cross the BBB and target GBM cells.This study aims to explore the anti-GBM effect of angiopep-2(Ap)peptide modified reactive oxygen species(ROS)cleavable thioketal(TK)linked glycolipid-like nanocarrier(CSTKSA)delivering anti-VEGF siRNA(R),termed as Ap-CSTKSA/R complexes.Ap functionalized modification produced an enhanced cellular uptake and a stronger bio-distribution of Ap-CSTKSA/R complexes in U87 MG cells and brain tumor tissues,respectively.Ap-CSTKSA/R complexes exhibited great superiority in GBM growth inhibition and finally translated into the longest survival period mainly via receptor-mediated targeting delivery,VEGF gene silencing accompanied with remarkable angiogenesis inhibition,and suppressed expression of caveolin-1 which is involved in BBB functional regulation in the occurrence and treatment of GBM.The study indicated that Ap functionalization on ROS-responsive glycolipid-like copolymer exhibits a promising and effective gene delivery platform for GBM targeted treatment.

关键词： glioblastoma ROS-responsive siRNA blood brain barrier copolymer

Modeling and Analysis of a Micromotor with an Electrostatically Levitated Rotor

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Chinese Journal of Mechanical Engineering 2009年第1期22卷 1-8页

作者： HAN fengtian wu Qiuping ZHANG Rong Department of Precision Instruments and Mechanology Tsinghua University Beijing 100084 China

The modeling and evaluation of a prototype rotary micromotor where the annular rotor is supported electrostatically in five degrees of freedom is presented in order to study the behavior of this levitated micromotor and further optimize the device geometry. The analytical torque model is obtained based on the principle of a planar variable-capacitance electrostatic motor while the viscous damping caused by air film between the stator and rotor is derived using laminar Couette flow model. Simulation results of the closed-loop drive motor, based on the developed dynamic model after eliminating mechanical friction torque via electrostatic suspension, are presented. The effects of the high-voltage drive, required for rotation of the rotor, on overload capacity and suspension stiffness of the electrostatic bearing system are also analytically evaluated in an effort to determine allowable drive voltage and attainable rotor speed in operation. The analytical results show that maximum speed of the micromotor is limited mainly by viscous drag torque and stiffness of the bearing system. Therefore, it is expected to operate the device in vacuum so as to increase the rotor speed significantly, especially for those electrostatically levitated micromotors to be used as an angular rate micro-gyroscope.

关键词： electrostatic levitation electrostatic micromotor variable-capacitance motor micro-gyroscope

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羧酸离子液体/氧气催化氧化芳甲醇

精细化工 2023年第3期40卷 689-696页

作者：吴丰田吴玲谢宗波东华理工大学江西省聚合物微纳制造与器件重点实验室院江西南昌330013 东华理工大学江西省合成化学重点实验室江西南昌330013

在组合体系“1-乙基-3-甲基咪唑乙酸盐([EMIm][OAc])/O_(2)”作用下,以芳甲醇为原料,经氧化反应,合成了系列芳甲醛(酮)类化合物。通过对条件进行优化,得到适宜反应条件为:芳甲醇与1-乙基-3-甲基咪唑乙酸盐物质的量比为1∶1、O_(2)压力为... 详细信息

在组合体系“1-乙基-3-甲基咪唑乙酸盐([EMIm][OAc])/O_(2)”作用下,以芳甲醇为原料,经氧化反应,合成了系列芳甲醛(酮)类化合物。通过对条件进行优化,得到适宜反应条件为:芳甲醇与1-乙基-3-甲基咪唑乙酸盐物质的量比为1∶1、O_(2)压力为0.20MPa、温度为130℃、时间为12h。在此条件下,实现了苯甲醛的克级规模制备,得到20种芳甲醛(酮),产率为62%~96%。提出了[EMIm][OAc]通过阴离子作用于苯甲醇,经O_(2)氧化,脱水得到苯甲醛的反应机理。

关键词：离子液体氧气氧化芳甲醇芳甲醛精细化工中间体

Copper-Catalyzed Direct Oxyphosphorylation of Enamides with P（O）-H Compounds and Dioxygen

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Chinese Journal of Chemistry 2017年第9期35卷 1378-1382页

作者： wu Liang Zhijie Zhang Dong Yi Qiang Fu Suyuan Chen Lu Yang fengtian Du Jianxin Ji Wei Wei Chengdu Institute of Biology Chinese Academy of Sciences Chengdu Sichuan 610041 China University of the Chinese Academy of Sciences Beijing 100049 China School of Chemistry and Chemical Engineering Qufu Normal University Qufu Shandong 273165 China

有 P (O)-H 混合物和 dioxygen 的 enamides 的简单、方便的催化铜的直接 oxyphosphorylation 在温和条件下面被开发了。这方法论能允许一系列珍贵 -ketophosphine oxides/-ketophosphonates 的合成在由使用乐意地可得到的开始的材料简... 详细信息

有 P (O)-H 混合物和 dioxygen 的 enamides 的简单、方便的催化铜的直接 oxyphosphorylation 在温和条件下面被开发了。这方法论能允许一系列珍贵 -ketophosphine oxides/-ketophosphonates 的合成在由使用乐意地可得到的开始的材料简单地与一个宽广底层范围节制到好收益。

关键词：化合物铜催化氧气氧化物

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某型水上电动飞机静水起飞阻力峰模拟与分析

飞行力学 2022年第4期40卷 81-86页

作者：吴江高峰黄淼佟胜喜杨凤田航空工业沈阳飞机设计研究所辽宁沈阳110035 辽宁通用航空研究院辽宁沈阳110136 中国特种飞行器研究所湖北荆门448035

针对某型浮筒式水上电动飞机准确计算水阻力峰的问题,利用CFD对其在静水面起飞过程的航行及过渡滑行阶段的运动状态进行了动力学仿真,并对仿真结果进行了试验验证。首先,基于流体体积模型确定了空气与水的两相交界自由表面的形态,基于... 详细信息

针对某型浮筒式水上电动飞机准确计算水阻力峰的问题,利用CFD对其在静水面起飞过程的航行及过渡滑行阶段的运动状态进行了动力学仿真,并对仿真结果进行了试验验证。首先,基于流体体积模型确定了空气与水的两相交界自由表面的形态,基于动态流体相互作用模型明确了飞机的纵倾角及升沉变化,求解了相应状态下的水阻力。然后,通过单浮筒拖曳试验验证了仿真方法的有效性。最后,结合工程实际,进行了姿态限制下飞机水阻力峰的模拟计算,并根据结果进行了电推进系统的选型与设计。所得结果可为水上电动飞机的研究提供参考。

关键词：电动水上飞机水阻力峰 CFD