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Chinese chemical Letters 2019年第1期30卷 239-242页

作者： Jingang Li Shuwen Li Xiaohui wang Fan Fan Kongyin Zhao Junfu wei Linhua zhang Dunwan zhu State Key Laboratory of Separation Membranes and Membrane processes Tianjin Polytechnic University Tianjin Key Laboratory of Biomedical Materials Institute of Biomedical Engineering Chinese Academy of Medical Sciences & Peking Union Medical College

In this study, biologically inspired silk fibroin grafted polyacrylonitrile(SF-g-pAN) filtration membrane was prepared using ZnCl_2 aqueous solution as solvent, avoiding the use of organic solvents. phase inversion occurred when Zn^(2+)and Cl-ions gradually diffused into water, creating a well-connected ion channel network and the SF-g-pAN filtration membrane was obtained. The membranes were observed by SEM and 3D ultra-depth microscope. The hydrophilic property, pore size distribution and dye rejection of the membrane were investigated. Results showed that the membrane has no finger hole formation because ZnCl_2 aqueous solution has a lower curing rate parameter compared with organic solvents. SF-gpAN membrane possessed good anti-fouling properties and pH sensitivity. The pore size distribution of the SF-g-pAN membrane was 0.25–1.04 nm. The rejection of direct yellow 27(Mw = 662.6) and amaranth(Mw = 604.5) was 96.51% and 30.63%, with the flux of 72.32 L m^(-2) h^(-1) and 73.83 L m^(-2) h^(-1) respectively at0.1 Mpa. The SF-g-pAN membrane has a wide range of applications prospect in fine separation, dye desalination, waste water treatment and biomedical fields.

关键词： Biologically inspired membrane Silk grafted polyacrylonitrile ZnCl2 aqueous solution Narrow pore size distribution pH-Sensitivity Anti-fouling

Iodide analysis by ion chromatography on a new stationary phase of polystyrene-divinylbenzene agglomerated with polymerized-epichlorohydrin-dimethylamine

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Chinese chemical Letters 2015年第8期26卷 1026-1030页

作者： Mu-Hua wang Zhong-ping Huang Jun-wei Liu Jie He Jia-Jie zhang Yan zhu Department of Chemistry Lishui University Department of Chemistry Xixi Campus Zhejiang University college of chemical engineering Zhejiang University of Technology

A new stationary phase for iodide ion analysis has been developed. The cationic polymerepichlorohydrin-dimethylamine（pEpI-DMA） was served as modifier in synthesizing polyelectrolyte sorbents and the macroporous polystyrene-divinylbenzene（pS-DVB） resin was used as support. The positively charged polymer（pEpI-DMA） was electrostatically bonded to a negatively charged particle（pS-DVB sulfonated）. The new stationary phase was characterized by scanning electron microscopy（SEM）, Fourier transform infrared（FTIR）, elemental analysis, chemical adsorption and desorption measurements. The chromatographic evaluation of the new stationary phase was performed using various anions with a conductivity detector. The new stationary phase was also applied to the determination of iodide directly with a DC amperometric detector using a platinum working electrode and an Ag/Ag Cl reference electrode. The chromatographic conditions were optimized and the eluent solution contained 5 mmol/L HNO3 and 15 mmol/L Na NO3 at a flow rate of 1.0 m L/min and column temperature of 30 8C. The applied voltage of the DC amperometric detector was 0.9 V. Under the optimum conditions, the linear range of the method was 0.2–50 mg/L for iodide ion with a correlation coefficient of 0.9990. The detection limit was 0.05 mg/L（calculated at S/N = 3） and the relative standard deviations（RSD, n = 6） were all less than 1% for retention time, peak area and peak height. This method was also utilized for the determination of iodide ions in samples of povidone iodine solution and kelp samples with satisfactory results.

关键词： stationary polystyrene iodide retention satisfactory synthesizing cationic utilized contained iodine

均相与多相催化剂在CO_(2)环加成反应中的研究进展

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燃料化学学报（中英文） 2024年第1期52卷 105-130页

作者：李宁宁刘轩博张宇航王雨佳常涛朱正河北工程大学材料科学与工程学院邯郸市CO_(2)催化转化重点实验室河北邯郸056038 河北省杂环化合物重点实验室河北邯郸056005

二氧化碳(CO_(2))是一种主要的人为温室气体,主要由化学、热电和钢铁工业以及运输等部门产生。大气层中CO_(2)浓度的增加是导致诸多环境问题的主要原因,如全球变暖、海平面上升和全球气温升高。然而,CO_(2)作为一种可再生、廉价和无毒... 详细信息

二氧化碳(CO_(2))是一种主要的人为温室气体,主要由化学、热电和钢铁工业以及运输等部门产生。大气层中CO_(2)浓度的增加是导致诸多环境问题的主要原因,如全球变暖、海平面上升和全球气温升高。然而,CO_(2)作为一种可再生、廉价和无毒的化学原料,可用来生产具有高附加值的化学品,进而降低碳浓度。五元环碳酸酯由于其优越的物理化学特性,如高沸点、高偶极矩和生物降解等性能而被广泛应用。由环氧化合物和CO_(2)合成环碳酸酯是迄今为止研究较多的方法。然而,由于CO_(2)的高热稳定性和动力学惰性,使其作为反应原料需要大量的能量投入,可能导致的结果是CO_(2)浓度是一个净增长过程。因此,利用CO_(2)作为C1构筑单元是一个长期的挑战。本工作基于CO_(2)固定反应机制,概述了各种类型的均相和多相催化剂在CO_(2)固定反应合成精细化学品环状碳酸酯中的研究进展,包括有机催化剂、离子液体、金属有机框架化合物、多孔有机聚合物等。目前,几乎所有类别催化剂均可以在室温和低压力下,以实验室规模成功地使用纯CO_(2)将其固定到末端环氧化合物上,对于非末端环氧化合物通过更高的温度和压力以实现相应转化。同时,分析了催化剂在多取代环氧化合物或生物衍生环氧化合物转化、低浓度CO_(2)转化和实现工业化三个方面所面临的挑战,并提出了未来相关研究努力的方向。

关键词： CO_(2) 环氧化合物催化剂环加成反应环碳酸酯

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短期夜间增温对亚高山针叶林云杉幼苗根系分泌物速率和化学成分的影响

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生态学报 2018年第9期38卷 3086-3096页

作者：蒋铮肖娟张子良乔明锋何为刘庆尹华军中国科学院成都生物研究所中国科学院山地生态恢复与生物资源利用重点实验室生态恢复与生物多样性保育四川省重点实验室成都610041 中国科学院大学北京100049 西华师范大学环境科学与工程学院南充637000 四川旅游学院成都610100

以连续7a红外辐射增温处理下的云杉幼苗为对象,定量分析了增温对植物根系碳(C)、氮(N)分泌速率以及主要挥发性化学成分的影响。结果表明:(1)增温显著增加了云杉幼苗根系C分泌速率,而对N分泌速率无显著影响,并伴随着根系分泌物C∶N化学... 详细信息

以连续7a红外辐射增温处理下的云杉幼苗为对象,定量分析了增温对植物根系碳(C)、氮(N)分泌速率以及主要挥发性化学成分的影响。结果表明:(1)增温显著增加了云杉幼苗根系C分泌速率,而对N分泌速率无显著影响,并伴随着根系分泌物C∶N化学计量比显著增加;(2)不同化学组分输入含量变化对增温的响应具有明显差异,其响应幅度和方向与化学组分种类有关。其中糖类、氨基酸和酚类化合物的含量在增温处理下均显著增加,而酯类、醚类相对含量显著降低;(3)进一步分析表明,同组分中不同化合物成分含量对增温的响应也有所差异。例如,增温仅导致酚类化合物中2,6-二叔丁基-4-甲基苯酚和4-叔丁基杯[4]芳烃含量显著增加(分别比对照增加了88.9%和375.7%),而对其余酚类化合物成分含量无显著影响。结果表明增温可导致植物根系分泌物各组分相对含量发生深刻地变化,这对于进一步认识不同环境变化下根系分泌物输入及其所诱导的特异性土壤微生物养分过程具有重要的理论意义。

关键词：模拟增温云杉根系分泌物化学成分亚高山针叶林

ONE-STEp pROCESS TO MAKE ELECtrICALLY CONDUCTIVE THERMOpLASTIC VULCANIZATES FILLED WITH MWCNTs

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Chinese Journal of polymer science 2012年第1期30卷 138-142页

作者： Hao-sheng wang Xiao-hong zhang Yi-lei zhu Zhi-hai Song Jin-liang qiao college of Materials science and engineering Beijing University of Chemical Technology Beijing 100029 China SINOpEC beijing Research Institute of chemical Industry Beijing 100013 China

Electrically conductive thermoplastic vulcanizates（TpVs） filled by multi-walled carbon nanotubes（MWCNTs） are prepared by a simple one-step melt mixing process,based on linear low density polyethylene（LLDpE） and ultrafme full-vulcanized rubber particles（UFRp）.An ideal morphology with controlled localization of MWCNTs in continuous LLDpE matrix and appropriate size of finely-dispersed UFRp can be achieved at the same *** controlled localization of MWCNTs in the continuous phase facilitates the formation of conductive pathway,and thus the volume resistivity of the as-prepared LLDpE/UFRp/MWCNTs thermoplastic vulcanizates is significantly *** results show that both the blend ratio of LLDpE/UFRp and the loading of MWCNTs have remarkable effect on the volume ***, the electrically conductive TpVs exhibit good mechanical properties duo to the fine dispersion of UFRp in *** added MWCNTs are capable of imparting reinforcement effects to thermoplastic vulcanizates with just a slight loss of stretchability and elasticity.

关键词： Thermoplastic vulcanizates Multi-walled carbon nanotubes Ultrafine full-vulcanized rubber particles Volume resistivity Mechanical properties

A Turn-On Fluorescence Chemosensor for Cyanide in Aqueous Media Based on a Nucleophilic Addition Reaction

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Chinese Journal of Chemistry 2017年第7期35卷 1165-1169页

作者： Jie Chen Wenting Li qiao Li Qi Lin Hong Yao Youming zhang Taibao wei Key Laboratory of Eco-Environment-Related polymer Materials Ministry of Education of ChinaKey Laboratory of Polymer Materials of Gansu ProvinceCollege of Chemistry and Chemical EngineeringNorthwest Normal UniversityLanzhouGansu 730070China

We synthesized a new cyanide （CN-） chemosensor CX based on a nucleophilic addition reaction prompted by cyanide ion, which could be used for highly selective and sensitive fluorescence turn-on detection of cyanide in aqueous media. The CX showed selective fluorescence recognition for CN-, the miscellaneous competitive anions （F-, Cl-, Br-, I-, AcO-, H2pO4, HSO4, ClO4, S2-, pO4^3-, CO3^2- and SCN- ） did not lead to any significant interference. The detection limit of the sensor towards CN is 1.15 × 10^-7 mol.L- 1. The sensor has been successfully applied to estimate the cyanide ion in seeds of cherries. Test strips based on CX were fabricated, which could be used as a convenient and efficient CN test kit to detect CN in aqueous solution for ＂in-the-field＂ measurement.

关键词： cyanide fluorescent chemosensor test kits seeds of cherries

粗糙脉孢菌(Neurospora crassa)木聚糖酶的合成及性质研究

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纤维素科学与技术 2002年第4期10卷 20-26页

作者：张潇朱冬青王丹林建强曲音波余世袁山东大学微生物技术国家重点实验室济南250100 南京林业大学化工学院南京210037

粗糙脉孢菌1602(Neurosporacrassa)可以产生木聚糖酶。以不同的植物纤维物料及纯木聚糖作为底物都可诱导产生较高的木聚糖酶活,其中玉米芯粉的诱导能力最强,酶活可达25.02IU/mL。纤维素与木聚糖混合对木聚糖酶合成具有促进作用。葡萄糖... 详细信息

粗糙脉孢菌1602(Neurosporacrassa)可以产生木聚糖酶。以不同的植物纤维物料及纯木聚糖作为底物都可诱导产生较高的木聚糖酶活,其中玉米芯粉的诱导能力最强,酶活可达25.02IU/mL。纤维素与木聚糖混合对木聚糖酶合成具有促进作用。葡萄糖、木糖对木聚糖酶的合成有很强的阻遏作用,葡萄糖的阻遏作用大于木糖的阻遏作用。其木聚糖酶最适作用pH值为5.4,最适作用温度为60℃。

关键词：粗糙脉孢菌木聚糖酶阻遏

Three Novel 3D MOFs with 2,2’-Dinitrobiphenyl-4,4’-dicarboxylic Acid

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Three Novel 3D MOFs with 2,2’-Dinitrobiphenyl-4,4’-dicarbo...

Red Electroluminescence and photoluminescence from Novel Binuclear Europium Complex with Squaric Acid Ligand

中国化学会第六届全国结构化学学术会议

作者： Jun Gong,Hai-Juan zhang,Yan Xu,Xuan Shen,Dun-Ru zhu~* college of Chemistry and chemical engineering,State Key Laboratory of Materials-oriented chemical engineering,Nanjing university of Technology,Nanjing,210009,p.R.china

＜正＞Metal-organic frameworks（MOFs） consisting of metal ions and organic ligands have attracted intense interest due to their intriguing structural topologies and promising applications in gas storage,ion-exchange, catalysis and molecular *** far,a large number of rigid multicarboxylic acids such as 1,4-benzenedicarboxylic acid（H2BDC）,1,3,5-benzenetricarboxylic acid（H3BTC）,and

关键词：

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Chinese chemical Letters 2001年第10期12卷 921-924页

作者： wei Guo zhu Xiao Qiang wei Mei Xiang zhu Zhi Yun LU Bo LIAng Ming Gui XIE De Qiang zhang Yong QIU college of Chemistry Xiangtan UniversityXiangtan411105 Department of Chemistry Sichuan UniversityChendu610064 Department of Chemistry Tsinghua University

A novel binuclear europium p-diketone complex with squaric acid ligand was synthesized for the first time. Its structure was elucidated by IR, UV, and Elemental Analysis. Red light emitting diode (LED) was fabricated by using the novel europium complex as an emitting layer, tris(8-quinolinolate) aluminum (III) (Alq(3)) as an electron-transporting layer, N, N'-diphenyl-N, N'-(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine (TpD) as a hole-transporting layer. A cell structure of indium-tin-oxide/TpD/Eu-complex/Alq(3)/Mg: Ag was employed. Red electroluminescence was observed at room temperature with dc bias voltage of 2 V in this cell. 2 Red emission peaks at about 613 nm with maximum luminance of over 106 cd/m(2). Compared with the EL luminance from those europium complexes reported before, one from the Eu-complex is best in the same cells.

关键词： europium chelate squaric acid electroluminescence (EL) photoluminescence (pL)

浸渍提拉法制备高分子纳米膜及膜厚控制机理研究

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化工新型材料 2018年第3期46卷 203-206页

作者：张向阳古峰孙蒙蒙朱钱马禹东华大学材料科学与工程学院上海201620 东华大学纤维材料改性国家重点实验室上海201620

以聚乙烯醇(pVA)水溶液为成膜溶液,硅片为成膜基板,采用浸渍-提拉法在硅片上制备了pVA纳米膜。通过对pVA溶液表面张力和黏度的测量,并结合高精度椭圆偏振光谱仪、透反射偏光显微镜和原子力显微镜对所制备pVA纳米膜的厚度和表面形貌进行... 详细信息

以聚乙烯醇(pVA)水溶液为成膜溶液,硅片为成膜基板,采用浸渍-提拉法在硅片上制备了pVA纳米膜。通过对pVA溶液表面张力和黏度的测量,并结合高精度椭圆偏振光谱仪、透反射偏光显微镜和原子力显微镜对所制备pVA纳米膜的厚度和表面形貌进行了测定和分析。结果表明,在高的提拉速率下,纳米膜的膜厚由提拉速率控制,符合Landau-Levich理论提出的标度关系;在低的提拉速率下,膜厚由溶剂挥发速率控制,与提拉速率无关。

关键词：聚乙烯醇纳米膜提拉法薄膜厚度