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Frontiers of Materials Science 2012年第4期6卷 326-337页

作者： Xiao-Yan ZHANG Yu-Fei MA Yong-Gang LI pin-pin wang Yuan-Liang wang Yan-Feng LUO Key Lab of Biorheological Science and Technology(Ministry of Education) Research Center for Bio-inspired Material Science and EngineeringCollege of BioengineeringChongqing UniversityChongqing 400030China

The goal of this study is to design and synthesize a linear segmented shape memory poly（urethane-urea）（SMPUU） that possesses near-body-temperature shape memory temperature （Ttran） and enhanced mechanical properties by incorporating flexible poly（ethylene glycol） 400 （PEG400） to form poly（D,L-lactic acid）-based macro- diols （PDLLA-PEG400-PDLLA） and then rigid piperazine （PPZ） as a chain extender to form the desired SMPUUs （PEG400-PUU-PPZ）. PEG400 increased Mn while maintaining a lower Tg of PDLLA-PEG400-PDLLA, which together with PPZ improved the mechanical properties of PEG400-PUU-PPZ. The obtained optimum SMPUU with enhanced mechanical properties （O＇y = 24.28 MPa; zf = 698%; Uf = 181.5 MJIm3） and a Tg of 40.62~C exhibited sound shape memory properties as well, suggesting a promising SMPUU for in vivo biomedical applications.

关键词： poly(urethane-urea) poly(D,L-lactic acid) poly(ethylene glycol) piperazine,shape memory property mechanical property

Efficient purification of Al_(30) by organic complexation method

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Journal of Environmental Sciences 2019年第6期31卷 240-247页

作者： Libing Liu Qinxue Yang pin wang Feng Xiao Ruyuan Jiao Guangyu An Dongsheng wang University of Chinese Academy of Sciences State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Faculty Materials Science and Chemistry China University of Geosciences

A method was developed for preparing high purity Al30O8(OH)56(H2O)_(24)^(18)+(Al30) through elimination of impurities by *** chloride II(PAC_(30))with Al_(c )content of 75%was adopted as the source of Al_(30).The PAC_(30)was prepared under conditions of total aluminum concentration 0.1 mol/L and OH^-/Al ratio 2.2 to obtain the highest content of Al_(30).A precipitation/metathesis method,organic solvent precipitation method and organic complexation method were examined to separate and purify Al_(30).It was found that only by the organic complexation method could high purity Al_(30)products be obtained in large yield *** the experiments,benzoic acid was used as the coordinating reagent to decompose the main impurity AlO_4Al_(12)(OH)_(24)(H_2O)_(12)^(7+)(Al_(13)),and the Al_(30)product could be obtained by precipitation and metathesis *** was noteworthy that the decomposition of impurities by benzoic acid could be completed in 2 *** Al_(30)product was characterized by Ferron assay,^(27)Al-NMR,SEM,XRD and *** results showed that the purity of the Al_(30)product could exceed 92%.

关键词： Polyaluminum chloride(PAC) Al13 Al30 Organic complexation Precipitation/metathesis

新型6-CCS并联机器人机构的运动学正解及仿真

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中国机械工程 2007年第24期18卷 2903-2906页

作者：甘东明廖启征王品魏世民北京邮电大学北京100876

介绍了一种由圆柱副、圆柱副和球面副构成的基于点、线间距离约束的新型解耦并联机构6-CCS,对结构和运动学正解进行了研究。通过对三个位置约束方程构造Dixon结式,去掉其中线性相关的三行三列,导出了一元64次输入输出方程,并根据位置的... 详细信息

介绍了一种由圆柱副、圆柱副和球面副构成的基于点、线间距离约束的新型解耦并联机构6-CCS,对结构和运动学正解进行了研究。通过对三个位置约束方程构造Dixon结式,去掉其中线性相关的三行三列,导出了一元64次输入输出方程,并根据位置的8个解与姿态解互相解耦的特点,总共有512个解。然后使用数值算例验证了其全部根。结合VC++6.0和OpenGL对其进行了三维建模和运动仿真,验证了这一新机构的可行性。

关键词：广义Stewart平台圆柱副运动学正解自由度分析运动仿真

A new evaluation model of comprehensive radio frequency stealth performance of radar

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International Journal of Modeling, Simulation, and Scientific Computing 2016年第3期7卷 367-385页

作者： Yang Zhao Chaoxuan Shang Zhuangzhi Han pin wang Department of Electronic and Optical Engineering Mechanical Engineering College Shijiazhuang Hebei 050003 P.R.China Mechanical Technology College Wuhan Hubei 430075P.R.China

The detection capabilities of passive electronic warfare reconnaissance equipment have substantially increased during recent ***,the radar equipment is required to take various means to improve the radio frequency(RF)stealth performance to ensure the transmitted RF signal does not get ***,traditional evaluation methods on RF stealth performance cannot accurately evaluate the RF stealth capabilities of new system *** this study,a joint interception probability evaluation model on RF stealth performance was established,which divided the interception process into two parts:front interception and system *** RF stealth means adopted by different radar equipment were taken into consideration to improve the applicability of this *** results show that this model is able to effectively characterize almost all the aspects of the RF stealth features and can serve as a good reference to evaluate RF radar stealth performance comprehensively.

关键词： Radio frequency stealth joint intercept probability front interception system interception measurement of recognition rate

A novel clustered SPIO nanoplatform with enhanced magnetic resonance T2 relaxation rate for micro-tumor detection and photothermal synergistic therapy

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Nano Research 2020年第8期13卷 2216-2225页

作者： Hongwei Lu Yongjing Xu Ruirui Qiao Ziwei Lu pin wang Xindan Zhang An Chen Liming Zou Zhongling wang Department of Radiology Shanghai General HospitalSchool of MedicineShanghai Jiaotong UniversityShanghai200080China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai201620China ARC Centre of Excellence in Convergent Bio-Nano Science and Technology Monash Institute of Pharmaceutical SciencesMonash University381 Royal ParadeParkvilleVIC3052Australia Department of Radiology The First Affiliated Hospital of Soochow UniversitySuzhou215006China Department of Gastroenterology Nanjing Drum Tower HospitalAffiliated Hospital of Nanjing University Medical SchoolNanjing210029China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen518055China

Construction of micro tumor sensitive theranostic nanoagents that can increase the accuracy of imaging diagnosis and boost the therapeutic efficacy has been demonstrated for a promising approach for diagnosis and treatment of ***,we reported a novel super-paramagnetic iron oxide(SPIO)based nanoplatform that possess significantly enhanced magnetic resonance property and photothermal effect for tumor theranostic *** polyethylene glycol with four phenylboronic acid(PEG-B4)/CNTs@porphyrin(ph)/SPIO(BCPS)nanoplatform was simply prepared via integrated SPIO,ph,and a novel dendrimer with PEG liner and four PBA groups(PEG-B4)on the surface of carbon nanotubes(CNTs).Subsequently,a significant T2 relaxation rate enhanced can be achieved by the reduced accessibility of water to SPIO ***,the synergetic enhanced photothermal from BCPS nanoplatform contributed to better photothermal effect for cancer ***,the targeting ability to sialic acid overexpressed tumor was further introduced from phenylboronic acid from *** showed that BCPS nanoplatform could not only selectively identify solid tumors and detect micro-sized metastatic tumor(1 mm)in the liver,but also effectively ablate tumors in a xenograft model,thereby achieving a complete cure rate of 100%at low laser *** results highlight the potential of BCPS nanoplatform for accurate micro-tumor diagnosis and effective tumor therapy.

关键词： theranostic agent clustered SPIO nanoplatform T2 MRI micro-tumor detection photothermal therapy synergetic effect

Monolithic Covalent Organic Framework Aerogels through Framework Crystallization Induced Self-assembly:Heading towards Framework Materials Synthesis over All Length Scales

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Chinese Journal of Polymer Science 2019年第11期37卷 1045-1052页

作者： Wei Zhao Tian-pin wang Jia-Li Wu Ru-ping Pan Xiang-Yang Liu Xi-Kui Liu College of Polymer Science and Engineering Sichuan University

Here, through the synergism between kinetic dynamic imine-exchange control and thermodynamic control, rarely observed compressible, porous, crystalline covalent organic framework (COF) aerogels were synthesized, the mechanism behind which is a framework crystallization induced self-assembly (FCISA) process. The prepared COF aerogel possessed extremely high BET surface over 2000 m^2·g^-1 and high maximum equilibrium adsorption capacity toward bisphenol-A of 699 mg·g^-1 in aqueous solution.

关键词： Covalent organic framework (COF) Aerogel Framework crystallization

Facile Syntheses and Desulfonylation of α-Alkyl- β-disulfones

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Chemical Research in Chinese Universities 1993年第1期9卷 91-94页

作者： wang Ya-pin and HUANG Xian (Department of Chemistry, Hangzhou University, Hangzhou, 310028)

Introduction Recently more attention has been paid to the application of sulfones to organic synthesis. Because the arylsulfonyl groups can stabilize adjacent carbanions and may be removed by reduction and elimination... 详细信息

关键词： Disulfones Alkylation Desulfonylation Phase transfer catalysis

Preparation of Organic Nanoparticle Colloids by Laser Ablation and Their Nonlinear Optical Properties

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Chemical Research in Chinese Universities 2011年第6期27卷 1045-1048页

作者： YANG Jie wang Rui DING Ran LI Ai-wu YU Yong-sen wang Ji-pin YANG Han State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University Changchun 130012 P. R. China Department of Radiology The First Hospital of Jilin University Changchun 130021 P. R. China

Suspension of micrometer-sized 1,4-bis（4-methylstyryl）benzene（p-MSB） was converted into colloidal nanocrystal solution by irradiation with an femtosecond laser（800 nm, 1 kHz）. The prepared nanocrystals were rectangular with ca. 100 nm in size. The same crystal structure as that of bulk crystals was confirmed by X-ray diffraction measurement. UV-Vis spectra and emission spectra of the nanoparticle dispersions in dichloromethane（poor solvent） were examined. The nanocrystal exhibits large quantum yield（89%）. The nonlinear optical properties of the nanocrystals were further studied by Z-scan technique with femtosecond laser duration of 120 fs at a wavelength of 800 nm. The results show that the nanocrystals exhibit strong nonlinear absorption.

关键词： Laser ablation Organic nanocrystal Nonlinear optical property

Bipolarized intrinsic faradaic layer on a semiconductor surface under illumination

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National Science Review 2023年第4期10卷 114-122页

作者： Mengfan Xue Zhiqiang Chu Dongjian Jiang Hongzheng Dong pin wang Gengzhi Sun Yingfang Yao Wenjun Luo Zhigang Zou Eco-Materials and Renewable Energy Research Center (ERERC) Jiangsu Key Laboratory for Nano Technology National Laboratory of Solid State Microstructures and Department of Physics Nanjing University National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences Nanjing University Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM) Nanjing Tech University

Interface charge transfer plays a key role in the performance of semiconductors for different kinds of solar energy utilization, such as photocatalysis, photoelectrocatalysis, photochromism and photo-induced superhydrophilicity. In previous studies, different mechanisms have been used to understand interface charge transfer processes. However, the charge transfer mechanism at the solid/liquid interface remains a controversial topic. Here, taking TiO2as a model, we find and prove, via experiments, the new characteristic of photo-induced bipolarity of the surface layer(reduction faradaic layer and oxidation faradaic layer) on a semiconductor for the first time. Different from energy level positions in the classic surface states transfer mechanism, the potential window of a surface faradaic layer is located out of the forbidden band. Moreover,we find that the reduction faradaic layer and oxidation faradaic layer serve as electron and hole transfer mediators in photocatalysis, while the bipolarity or mono-polarity of the surface layer on a semiconductor depends on the applied potential in photoelectrocatalysis. The new characteristic of bipolarity can also offer new insights into the charge transfer process at the semiconductor/liquid interface for solar energy utilization.

关键词： semiconductor surface interface charge transfer reduction faradaic layer oxidation faradaic layer faradaic layer descriptor

Effects of thermal treatment on physical and mechanical characteristics of coal rock

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Journal of Central South University 2016年第9期23卷 2336-2345页

作者： YIN Tu-bing wang pin LI Xi-bing SHU Rong-hua YE Zhou-yuan School of Resources and Safety Engineering Central South University Changsha 410083 China School of Energy and Safety Engineering Hunan University of Science and Technology Xiangtan 411201 China

To study the physical and mechanical properties of coal rock after treatment at different temperatures under impact loading, dynamic compression experiments were conducted by using a split Hopkinson pressure bar(SHPB). The stress–strain curves of specimens under impact loading were obtained, and then four indexes affected by temperature were analyzed in the experiment: the longitudinal wave velocity, elastic modulus, peak stress and peak strain. Among these indexes, the elastic modulus was utilized to express the specimens' damage characteristics. The results show that the stress–strain curves under impact loading lack the stage of micro-fissure closure and the slope of the elastic deformation stage is higher than that under static loading. Due to the dynamic loading effect, the peak stress increases while peak strain decreases. The dynamic mechanical properties of coal rock show obvious temperature effects. The longitudinal wave velocity, elastic modulus and peak stress all decrease to different extents with increasing temperature, while the peak strain increases continuously. During the whole heating process, the thermal damage value continues to increase linearly, which indicates that the internal structure of coal rock is gradually damaged by high temperature.

关键词： rock mechanical property split Hopkinson pressure bar (SHPB) high temperature coal rock dynamic mechanical property