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Particuology 2019年第3期17卷 22-27页

作者： Xiangming Na Weiqing Zhou Tong Li Ding Hong Juan Li Guanghui Ma State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China

A scalable and versatile strategy was developed for the fabrication of uniform polymeric microspheres with controllable interconnected porous structures. Uniform water-in-oil-in-water emulsions with linear poly(methyl methacrylate-glycidyl methacrylate) in the oil phase were generated by two-step premix membrane emulsification and used for constructing the microspheres. During the emulsion solidification process, internal water droplets were packed densely together, forming a thin oil film between the internal and external water phases. After solvent diffusion, the thin film can be ruptured and pores can be templated from the internal water droplets to form interconnected porous structures. Membranes with various pore sizes were obtained. The osmotic pressure and Laplace pressure balance were used to control the porosity and pore size precisely. The proposed method enables the fabrication of functional polymeric microspheres with uniform and controllable porous structures and particle sizes. This improves their performance and broadens the scope of their applications, especially in chromatographic separation.

关键词： Double emulsion Membrane emulsification Porous microsphere Uniform structure

A Comparative Study on emulsion Polymerization Processes of Styrene Initiated by Water-soluble and Oil-soluble Initiators

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Chinese Journal of Polymer Science 2019年第2期37卷 142-148页

作者： Xiao-Jing Liu Yu-He Tian Yang-Cheng Lu State Key Laboratory of Chemical Engineering Department of Chemical Engineering Tsinghua University

The solubility of initiator determines its distribution and the roles played in emulsion polymerization as well as the final products, but this is still lack of systematic investigation. The present work focuses on this issue by comparing the kinetic behaviors and product properties of styrene emulsion polymerization initiated by 2,2-azoisobutyronitrile(AIBN) and potassium persulphate(KPS).Compared to KPS-initiated emulsion polymerization, the AIBN-initiated polymerization was found to be insensitive to the type of emulsifier, and have high polymerization rate as well as narrow molecular weight distribution and particle size distribution. This result indicates the effective free radicals are generated in micelles or colloids, which could decrease the proportion of homogeneous nucleation and make the process and product more controllable. As a consequence, there is a linear relationship between molecular weight of product and AIBN concentration in lg-lg coordinate. It provided a reference for the preparation of latexes with specified molecular weight and supported the possibility of the coexistence of multiple free radicals in one micelle or colloid when using oil-soluble initiator.

关键词： emulsion polymerization Oil-soluble initiator Water-soluble initiator Styrene Reaction mechanism

DESIGN AND IMPLEMENTATION OF COMPLETELY AUTOMATIC AND CONTINUAL PRODUCTION LINE FOR WATER-IN-OIL(W/O) emulsion EXPLOSIVE

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中国有色金属学会会刊：英文版 1999年第2期9卷 201-207页

作者： He, Jianjun Yu, Shouyi Gui, Weihua Central South Univ of Technology Changsha China

１ＩＮＴＲＯＤＵＣＴＩＯＮＥｘｐｌｏｓｉｖｅｉｓｏｎｅｏｆｔｈｅｔｒｅｍｅｎｄｏｕｓｅｎｅｒｇｙｒｅｓｏｕｒｃｅｓｗｈｉｃｈｐｅｏｐｌｅｏｆｔｅｎｕｔｉｌｉｚｅ．Ｉｔｉｓｎｏｔｏｎｌｙｕｓｅｄｉｎｍｉｌｉｔａｒｙｐ... 详细信息

１ＩＮＴＲＯＤＵＣＴＩＯＮＥｘｐｌｏｓｉｖｅｉｓｏｎｅｏｆｔｈｅｔｒｅｍｅｎｄｏｕｓｅｎｅｒｇｙｒｅｓｏｕｒｃｅｓｗｈｉｃｈｐｅｏｐｌｅｏｆｔｅｎｕｔｉｌｉｚｅ．Ｉｔｉｓｎｏｔｏｎｌｙｕｓｅｄｉｎｍｉｌｉｔａｒｙｐｕｒｐｏｓｅｓ，ｂｕｔａｌｓｏｕｓ...

关键词： W/O emulsion explosiveautomatic adjusting charge ratioautomatic charge mixingautomatic adjusting output

Experimental characterization of the 3D linear viscoelastic behavior of cold recycled bitumen emulsion mixtures

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Journal of Traffic and Transportation Engineering(English Edition) 2019年第4期6卷 324-336页

作者： Andrea Graziani Carlotta Godenzoni Francesco Canestrari Dipartimento di Ingegneria Civile Edile e Architettura Università Politecnica delle Marche

Cold mixtures with bitumen emulsion are produced at ambient temperature, leading to substantial reductions of energy consumption and atmospheric emissions. In cold recycling applications, cement is normally used to improve the mixture performance. Thus, the rheological behavior of cold recycled mixtures is different from that of conventional hot mixtures because it is due to the interaction of fresh bitumen, aged bitumen and cementitious bonds. In this study, we investigated the three-dimensional(3 D) linear viscoelastic(LVE) behavior of a cement-bitumen treated material(CBTM) mixture fabricated using bitumen emulsion and cement. For comparison, we also investigated the 3 D LVE behavior of hot-mix asphalt containing 25% of reclaimed asphalt and fabricated using polymermodified binder. Sinusoidal axial tests on cylindrical specimens, were carried out at various temperatures(from 0℃ to 50℃) and frequencies(from 0.1 to 12 Hz). The complex Young’s modulus E~*and the complex Poisson’s ratio v~*were determined through the measurement of axial and transverse strain. We show that when considering E*, CBTM mixtures may be considered thermo-rheologically simple and the Huet-Sayegh model can be used to simulate the frequencyetemperature dependence. On the other hand, when considering v*the behavior of CBTM mixtures is very different from that of hot mix asphalt. In particular, its absolute value is almost constant and very close to 0.15.

关键词： Bitumen emulsion Cold recycling Complex modulus Complex Poisson’s ratio Huet-Sayegh model

Robust superhydrophobic polyurethane sponge functionalized with perfluorinated graphene oxide for efficient immiscible oil/water mixture, stable emulsion separation and crude oil dehydration

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Science China(Technological Sciences) 2019年第9期62卷 1585-1595页

作者： CAO Ning GUO JingYu BOUKHERROUB Rabah SHAO QingGuo ZANG XiaoBei LI Jin LIN XueQiang JU Hong LIU EnYang ZHOU ChaoFan LI HuiPing Key Laboratory of Unconventional Oil & Gas Development Ministry of EducationChina University of Petroleum (East China)Qingdao 266580China School of Materials Science and Engineering China University of Petroleum (East China)Qingdao 266580China Univ. Lille CNRSCentrale LilleISENUniv. ValenciennesUMR 8520IEMNLilleFrance School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao 266590China

In recent years, graphene oxide(GO), prepared by the modified Hummers’ method, and its derivatives have become a focus of research owing to their outstanding physical and chemical properties and low cost. Drawing inspiration from the mussel protein,a facile and environmentally-friendly method was employed to fabricate superhydrophobic/superoleophilic reduced graphene oxide(rGO) derivative. The preparation comprises two steps: coating GO nanosheets with polydopamine(PDA) and subsequent reaction with 1H,1H,2H,2H-perfluorodecanethiol. Due to the excellent adhesive ability of PDA, the resulting f PDA modified rGO nanosheets(rGO-f PDA) were firmly immobilized onto polyurethane(PU) sponge skeleton by a simple drop-coating method. The as-prepared rGO-f PDA functionalized sponge exhibited superhydrophobic behavior with a water contact angle of 162°±2°, high organic adsorption capacity, recyclability and stable oil/water separation behavior under different acidic/alkaline conditions. Due to its facile fabrication technique and outstanding properties, the superhydrophobic-superoleophilic PU-rGOf PDA sponge holds great promise as an oil adsorbent for cleaning up large-scale pollution of oil and organic solvents, and dehydrating crude oil.

关键词： graphene oxide superhydrophobic sponge adsorption oil/water separation emulsion

Activity of Brucea javanica oil emulsion against gastric ulcers in rodents

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Asian Journal of Pharmaceutical Sciences 2018年第3期13卷 279-288页

作者： Qian Li Linglong Yang Linlin Fan Chen Liang Qiujv Wang Huimin Wen Jinwei Dai Xin Li Yuyang Zhang School of Life Science and Biopharmaceutics Shenyang Pharmaceutical University

The present study aims to investigate the gastroprotective effect of Brucea javanica oil emulsion(BJOE) in animals. Gastroprotective potential of BJOE was studied on absolute ethanol,aspirin, reserpine and restraint plus water immersion-induced gastric ulcers in mice as well as glacial acetic acid(GAA) and pyloric ligation(PL)-induced gastric ulcers in rats. Except for ulcer scores, total acidity as well as pepsin activity as for the PL-induced gastric ulcer model and ulcer incidence as for the GAA-induced gastric ulcer model were also determined. Histopathological evaluation as for aspirin, reserpine, PL-induced models was conducted. Results showed that BJOE significantly(P < 0.05) reduced ulcer index in the mouse and rat models in a dose-dependent manner. It had significant(P < 0.05) suppressive effect on total activity of gastric juice as well in PL-induced model. Histopathological examination for the stomach samples confirmed the findings in the aspirin, reserpine or PLinduced gastric lesion models, which showed relatively complete mucosa structure and less inflammation. It is concluded that BJOE could be effective on gastric ulcer in rodents and its gastroprotective activity might be related to antioxidant, anti-inflammatory ability and promote gastric mucus secreted. The results may provide beneficial basis for increasing BJOE's clinical indication in future.

关键词： Gastric ulcer Brucea javanica oil emulsion Gastric mucosa Ulcer scores Glacial acetic acid Pepsin activity

RADICAL DESORPTION IN emulsion POLYMERIZATION OF VINYL ACETATE

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Chinese Journal of Chemical Engineering 1995年第4期3卷 17-24页

作者：曹同玉甘志华王艳君许涌深柯长颢天津大学应用化学系天津

In the present paper a model equation for calculating the radical desorption rate constant,k0,in the emulsion polymerization of vinyl acetate was suggested and the various parameters forevaluating k0 were determined.Effects of reaction temperature,emulsifier concentration,initiator con-centration,monomer conversion and phase ratio on k0 were studied.It indicates that the desorptionof radicals from latex particles to aqueous phase must be taken into account in the modelling ofemulsion polymerization for the monomers with higher hydrophilicity such as vinyl acetate.

关键词： emulsion polymerization vinyl acetate radical desorption latex particle

Brucea javanica oil emulsion improves the effect of radiotherapy on esophageal cancer cells by inhibiting cyclin D1-CDK4/6 axis

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World Journal of Gastroenterology 2019年第20期25卷 2463-2472页

作者： Zhong-Hua Qiu Wei-Wei Zhang Hong-Hua Zhang Gui-Hua Jiao Department of Neurology Liangshan County People's HospitalJining272600Shandong ProvinceChina Department of Neurology Liangshan County People's HospitalJining272600Shandong ProvinceChina

BACKGROUND Esophageal cancer is one of the most common cancers around the world, and it has high incidence and mortality rates. The conventional therapy for esophageal cancer is radiotherapy, although its effect is highly limited by the resistance of esophageal cancer cells. Thus, strong radiosensitizers can be very crucial during radiotherapy against esophageal cancer. Brucea javanica oil emulsion (BJOE) is a widely used drug against various cancers, such as liver, colon, and ovarian cancer. However, its anti-cancer effect and mechanism and the use of BJOE as a radiosensitizer have not been explored in esophageal cancer. AIM To evaluate the anti-cancer effect and mechanism of BJOE and explore the potential use of BJOE as a radiosensitizer during radiotherapy. METHODS The inhibitory effect of BJOE and its enhancement function with radiation on cell viability were examined with the calculated half-maximal effective concentration and half-maximal lethal concentration. The influence of BJOE on cell migration and invasion were measured with EC109 and JAR cells by wound-healing and transwell assay. Clonogenesis and apoptotic rate, which was measured by Hoechst staining, were investigated to confirm its enhancement function with radiation. To investigate the molecular pathway underlying the effect of BJOE, the expressions of several apoptosis- and cycle-related proteins was detected by western blotting.cell lines more than normal cell lines, and it markedly reduced migration and invasion in esophageal cancer cells (EC109 and JAR). Moreover, it promoted cell apoptosis and enhanced the effect of radiotherapy against esophageal cancerous cells. In the viability test, the values of half-maximal effective concentration and half-maximal lethal concentration were reduced. Compared to the control, only around 1/5 colonies formed when using BJOE and radiation together in the clonogenic assay. The apoptotic rate in EC109 was obviously promoted when BJOE was added during radiotherapy. Our study suggests that the expression of the

关键词： Esophageal cancer Brucea javanica oil emulsion Radiosensitizer Apoptosis Cyclin D1-CDK4/6 axis

Synthesis of Spherical (Y,Gd)BO_3:Eu^(3+)Phosphor Using W/O emulsion System

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Journal of Rare Earths 2006年第6期24卷 719-723页

作者：崔向中庄卫东张熙莹夏天龙震鱼志坚赵春雷黄小卫 National Engineering Research Center for Rare Earth Materials General Research Institute for Nonferrous Metals Grirem Advanced Materials Co. Ltd. Beijing 100088 China

Spherical （Y, Gd）BO3：Eu^3＋ phosphor particles with a narrow size distribution（2 -4 μm） was obtained by firing the Y-Gd-Eu-BO3 precursor prepared in a W/O style emulsion system. In the W/O emulsion system, kerosene, used as oil phase, was mixed with Span 80 and Tween 80 compounds which were employed as the emulsifier with an HLB （hydrophile-lipophile balance） value of 5.2- 5.3. Both rare earths （Y, Gd and Eu） nitrate and boric acid solution or ammonia solution were used as aqueous phase. The synthesis conditions, such as emulsion composition, emulsifying style, precipitation reaction process, reaction temperature, morphology control, and so on, were investigated, and the optimum synthesis conditions for preparing spherical （Y, Gd）BO3：Eu^3＋ phosphor was obtained. The phosphor was characterized by XRD, SEM, laser particle size analysis, emission and excitation spectrum under vacuum ultraviolet （VUV）, and so on. The phosphor synthesized using the water-in-oil emulsion method with median diameter （D50） of 2 - 4 μm shows agreeable photoluminescence （PL） property and sphericity. The main emission peak appears at about 593 nm, which corresponds to ^5D0→^7F1 transition （magnetic-dipole transition） of the Eu^3＋ ion. The cell parameters and powder diffraction data were indexed. The structure of the phosphor belongs to the hexagonal system with space group P63/m.

关键词： emulsion W/O PDP phosphor photoluminescence （PL） property VUV rare earths

Extraction of Amino-J Acid from Waste-water by emulsion Liquid Membrane

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过程工程学报 2006年第5期6卷 738-741页

作者：潘碌亭 State Key Laboratory of Pollution Control and Resource Reuse Tongji UniversityShanghai 200092China

The emulsion liquid membrane technique was used to extract amino-J acid from industrial dye waste-water.The effects of stirring speed,ratio of the emulsion to water(Rew),ratio of the oil to internal phase(Roi)and membrane phase components on the extraction rate were investigated and optimized.The results showed that the extraction rate of amino-J acid approached 97% when the stirring speed was 300 r/min,Rew 1:6,Roi 1:1,trioctylamine(TOA)3 mL/100 mL kerosene,and methyl?didecyle?alcohol?acrylate(LMA-2)3 g/100 mL kerosene,respectively.The extraction rate had not changed with the oil phase reused for times.

关键词： emulsion liquid membrane liquid membrane separation industrial waste-water amino-J acid