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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

Synthesis of unique-morphological hollow microspheres of MoS2@montmorillonite nanosheets for the enhancement of photocatalytic activity and cycle stability

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Journal of Materials Science & Technology 2020年第6期41卷 88-97页

作者： Peng Chen Shilin Zeng Yunliang Zhao Shichang Kang Tingting Zhang Shaoxian Song Hubei Key Laboratory of Mineral Resources Processing and Environment Wuhan University of TechnologyLuoshi Road 122WuhanHubei430070China School of Resources and Environmental Engineering Wuhan University of TechnologyLuoshi Road 122WuhanHubei430070China

In this work,MoS2@montmorillonite nanosheets hollow microspheres(MoS2@MMTNS-HMS)with a novel morphology structure was successfully synthesized through loading MoS2 to the surface of MMTNS-HMS via hydrothermal method.The novel material has been characterized through the measurements of SEM,TEM,Raman spectra and UV–vis absorption spectra.The results have shown that MoS2@MMTNS-HMS emerges higher light-utilization efficiency,density of edge active sites and separation of photoelectrons,owing to its unique hollow structure,vertically-aligned MoS2 nanosheets,which greatly enhances its photocatalytic activity.Furthermore,the cycle stability of MoS2@MMTNS-HMS is much higher than that of pristine MoS2,which is attributed to that MMTNS-HMS greatly inhibits the oxidation of MoS2 during photocatalytic.MoS2@MMTNS-HMS could be a promising photocatalyst for the applications in the elimination of organic pollutants.

关键词： MoS2 Montmorillonite Hollow microsphere Photocatalytic Methyl orange

Preparation of Electrically Conductive Filler for Anisotropic Conductive Adhesive

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上海交通大学学报 2007年第S2期41卷 127-130,138页

作者：华丽安兵吴懿平吴丰顺王佳何敬强 State Key Lab.of Material Processing and Die & Mould Technology Huazhong Univ.of Science & Technology

The preparation process of electrically conductive filler for anisotropic conductive adhesive was performed and discussed.The spherical filler contains tri-layer structures: resin core,Ni-P intermediate coating layer,Au outer coating layer.The 4 μm resin spherical cores were synthesized by monodispersion polymerization method.Then they were contributed to electrical conductivity by electrolessly plating Ni-P layer and gold layer.These particles have good corrosion resistance,high stability,and enough mechanical strength.When mixed with thermosetting epoxy resin to produce anisotropic conductive adhesive(ACA),it can realize a good conductive bonding between bumps on dies and pads on substrates.This environmentally friendly conductive material offers numerous advantages over conventional solder technology and is an ideal substitute for the lead-contained solder in electronics packaging.

关键词： anisotropic conductive adhesive(ACA) monodispersion polymerization microsphere electroless plating

Preparation and Characterization in vitro of Sustained-release Captopril/ Chitosan-gelatin Net-polymer microspheres(Cap/CGNPMs)

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Journal of Wuhan University of Technology(Materials Science) 2006年第3期21卷 35-40页

作者：宋益民 Chemical School Qingdao University of Science and Technology Qingdao 266042 ChinaDepartment of Biology Ocean University of China Qingdao 266003 China

The captopril/ Chitosan-gelatin net-polymer microspheres （ Gap/ CGNPMs ） were prepared using Chitosan （ CS ） and gelatin （ Gel ） by the methods of emulsification. A cross linked reagent alone or in combination with microcrystalline cellulose （ MCC ） was added in the process of preparation of microspheres to eliminate dose dumping and burst phenomenon of microspheres for the improvemeat of the therapeutic efficiency and the decrease of the side effects of captopril （ Cap ）. The results indicate that Cap/ CGNPMs have a spherical shape , smooth surface roorphology and integral inside structure and no adhesive phenomena and good roobility , and the size distribution is mairdy from 220 to 280 μm. Researches on the Cap release test in vitro demonstrate that Cap/ CGNPMs are of the role of retarding release of Cap compared with Cap ordinary tablets （COT）, embedding ratio （ER） , drug loading （ DL ）, and swelling ratio （ SR ）, and release behaviors of CGNPMS are influenced by process conditions of preparation such as experimental material ratio （EMR） , composition of cross linking reagents. Among these factors , the EMR（1/4）, CLR （ FOR ＋ TPP） and 0.75% microcrystulline cellulose （MCC） added to the microspheres are the optimal scheme to the preparation of Cap/CGNPMs. The Cap/CGNPMs have a good characteristic of sustained release of drug, and the process of emulsifieation and crossinking process is simple and stable. The CGNPMs is probable to be one of an ideal sustained release system for water-soluble drugs.

关键词： captopril chitosan gelatin microsphere drug sustained release

Controlled release behaviors of chitosan/α,β- glycerophosphate thermo-sensitive hydrogels

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Frontiers of Materials Science 2012年第3期6卷 250-258页

作者： Wei-Fang LIU Chuan-Zhen KANG Ming KONG Yang LI Jing SU An YI Xiao-Jie CHENG Xi-Guang CHEN College of Marine Life Science Ocean University of ChinaQingdao 266003China The Affiliated Hospital of Medical College Qingdao UniversityQingdao 266001China

Chitosan/α,β-glycerophosphate （CS/α,β-GP） thermo-sensitive hydrogels presented flowable solution state at low temperature and semisolid hydrogel when the ambient temperature increased. In this research, different concentrations of metronida- zole encapsulated, CS and α,β-GP, as well as different acid solvents, were chosen to evaluate their influences on the drug release behaviors from CS/α,β-GP hydrogels. It was found that there was a sustaining release during the first 3 h followed by a plateau. SEM images showed that drugs were located both on the surface and in the interior of hydrogels. The optimal preparation conditions of this hydrogel for drug release were as follows： 1.8% （w/v） CS in HAc solvent, 5.6% （w/v） a, 13-GP and 5g/L metronidazole encapsulation. Cytotoxicity evaluation found no toxic effect. In order to control the release rate, 2.5 g/L chitosan microspheres with spherical shape and smooth surface were incorporated, and it was found that the initial release process was alleviated, while drug concentration had no obvious effect on the release rate. It could be concluded that the metronidzole release behaviors could be optimized according to practical applica- tions.

关键词： chitosan （CS） glycerophosphate （GP） thermo-sensitive hydrogel con-trolled release microsphere

Magnetic Fe3O4@mTiO2-AIPA microspheres for Separation of Phosphoproteins and Non-phosphoproteins

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Journal of Wuhan University of Technology(Materials Science) 2019年第3期34卷 752-759页

作者：汤秋菡 ZHAO Rui 陆琦卿光焱 School of Chemistry Chemical Engineering and LifeScienceWuhan University of TechnologyWuhan430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China Research &Development Center Jushi Group Co.UdTongxiang314500China

A novel phosphoprotein separation material was developed, which is constructed by a magnetic mesoporous Fe3O4@TiO2 (Fe3O4@mTiO2) microsphere and a 5-aminoisophthalic acid (AIPA) monolayer that provides additional binding sites toward phosphate groups. The results of characteristic experiments demonstrated that Fe3O4@mTiO2-AIPA had good dispersability, high magnetic susceptibility, and satisfactory grafting ratio of AIPA, ascribed to the large specific surface area of the inorganic substrate. Taking advantages of these features, Fe3O4@mTiO2-AIPA was successfully utilized to separate a-casein (a typical phosphoprotein) and bovine serum albumin (BSA, a typical non-phosphoprotein) from their mixtures (molar ratio = 1:2). Through adjusting pH and polarity of solutions, the BSA and a-casein were respectively enriched in washing fraction and elution fraction. This result displays the good potential of Fe3O4@mTiO2-AIPA for application in phosphoprotein enrichment.

关键词： magnetic microsphere phosphoprotein separation a-casein

A study of function mechanism of hemxamethyl tetra-amine in gelation process of uranium

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Rare Metals 2006年第Z1期25卷 343-346页

作者： GUO Wenli LIANG Tongxiang ZHAO Xingyu HAO Shaochang FU Xiaoming Institute of Nuclear and New Energy Technology Tsinghua University Beijing 100084 China Institute of Nuclear and New Energy Technology Tsinghua University Beijing 100084 China Institute of Nuclear and New Energy Technology Tsinghua University Beijing 100084 China Institute of Nuclear and New Energy Technology Tsinghua University Beijing 100084 China Institute of Nuclear and New Energy Technology Tsinghua University Beijing 100084 China

The UO2 ceramic microspheres are the most important materials in the spherical fuel elements for high temperature reactor (HTR). A process for preparation of UO2 kernels known as total gelation process of uranium (TGU) was developed as the production process of 10 mW HTR at Tsinghua University. The TGU process is based on the traditional sol-gel process, external gelation process and internal gelation process of uranium (EGU and IGU), which implies that the gelation action is initiated both by ammonia out of the gel particles and hemxamethyl tetra-amine (HMTA) inside the gel particles. The gelation behavior and the properties of uranium microspheres were investigated of the solution with and without HMTA. It is observed that good spherical particles can be obtained without HMTA in the sol, which indicates a more controllable and industrialized route will be set up. Contrasts between this route and the traditional EGU were also listed.

关键词： gelation process of uranium high temperature reactor (HTR) UO2 microsphere

Luminescent-plasmonic core-shell microspheres,doped with Nd3+ and modified with gold nanoparticles,exhibiting whispering gallery modes and SERS activity

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Journal of Rare Earths 2019年第11期37卷 1152-1156页

作者： Marcin Runowski Inocencio R.Martin Vladimir N.Sigaev Vitaliy I.Savinkov Georgiy Yu.Shakhgildyan Stefan Lis Faculty of Chemistry Adam Mickiewicz UniversityUniwersytetu Poznanskiego 861-614 PoznanPoland Departamento de Fisica Instituto de Materiales y Nanotecnologia(IMN)Universidad de La LagunaApdo.456E-38200 San Cristobal de La LagunaSanta Cruz de TenerifeSpain D.Mendeleev University of Chemical Technology Miusskaya Sq.9125047 MoscowRussia

Multifunctional core/shell type,luminescent-plasmonic material composed of lanthanide doped microspheres(≈50μm)and gold nanoparticles(Au NPs;≈10-20 nm)deposited onto their surface,were successfully prepared(Nd^3+:YAS@Au).The material was synthesized to combine the luminescence properties of the Nd^3+-doped microspheres,i.***.whispering resonance with plasmonic activity of the surface Au NPs,i.***.surface enhanced Raman scattering(SERS)effect,within a single,micro-sized material.The luminescent-plasmonic microspheres were used as the active SERS substrate for detection of the organic probe,and for generation of Whispering Gallery Modes(WGM),which red-shift together with increasing laser power(temperature elevation).The products obtained were analysed with optical,scanning and transmission electron microscopy(SEM and TEM),as well as by Raman,absorption and photoluminescence spectroscopies.

关键词： Luminescence Gold NPs-SPR Surface enhanced Raman scattering microsphere resonators-WGM Lanthanide ions Optical sensors

Visible Light Photocatalytic Properties and Thermochromic Phenomena of Nanostructured BiOCl microspheres

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Journal of Materials Science & Technology 2014年第11期30卷 1130-1133页

作者： Jiushan Cheng Cong Wang Yinfang Cui Ying Sun Ying Zuo Center for Condensed Matter and Material Physics Department of PhysicsBeihang University

Black nanostructured BiOCI microspheres were directly synthesized by a hydrothermal method. The black ball- like BiOCI microspheres and black flower-like BiOCI microspheres were obtained using different surfactant. The color of the BiOCI microspheres turned from black to white when being annealed at 400 ℃ in air for 3 h and could be recovered to black by exposure to ultraviolet light for a few hours. The photocatalytic activity of both the black and the white BiOCI microspheres was characterized by the photo-degradation of methyl orange dye under visible light irradiation. The black ball-like nanostructure BiOCI displayed the best photocatalytic activity, compared with the white BiOCI and the black flower-like BiOCI. It can degrade the methyl orange dye to 20% within 70 min under visible light irradiation. The high activity of the BiOCI ball-like sphere may own to its special morphology, strong absorption in visible light range and the existence of oxygen vacancies.

关键词： Photocatalysis Black BiOCI microsphere Thermochromic

Effect of recombinant human bone morphogenetic protein 2/polylactide-co-glycolic acid (rhBMP-2/PLGA) with core decompression on repair of rabbit femoral head necrosis

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Asian Pacific Journal of Tropical Medicine 2014年第11期7卷 895-899页

作者： Zhao-Xun Pan Hong-Xin Zhang Ye-Xin Wang Long-Di Zhai Wei Du Department of Joint Surgery No 89 Hospital of People's Liberation Army

Objective:To observe the effect of recombinant human bone morphogenetic protein 2/polylactide-co-glycolic acid(rhBMP-2/PLGA) with core decompression on repair of rabbit femoral head necrosis.Methods:Bilateral femoral head necrosis models of rabbit were established by steroid injection.A total of 48 rabbits(96 femoral head necrosis) were randomly divided into 4groups:Group A,control group with12 rabbits,24 femoral head necrosis;Group B,treated with rhBMP-2/PLCA implantation after core depression,with 12 rabbits,24 femoral head necrosis;Group C,treated with rhBMP-2 implantation after core depression,with 12 rabbits,24 femoral head necrosis;Croup D treated with core depression group without implantation,with 12 rabbits,24 femoral head necrosis.All animals were sacrificed after 12 weeks.The ability of repairing bone defect was evaluated by X-ray radiograph.Bone mineral density analysis of the defect regions were used to evaluate the level of ossification.The morphologic change and bone formation was assessed by HE staining.The angiogenesis was evaluated by VEGF immunohistochemistry.Results:The osteogenetic ability and quality of femoral head necrosis in group B were better than those of other groups after 12 weeks by X-ray radiograph and morphologic investigation.And the angiogenesis in group B was better than other groups.Group C had similar osteogenetic quality of femoral head necrosis and angiogenesis with group D.Conclusions:The treatment of rhBMP-2/PLCA implantation after core depression can promote the repair of rabbit femoral head necrosis.It is a promising and efficient synthetic bone material to treat the femoral head necrosis.

关键词： rhBMP-2 microsphere Core decompression Femoral head necrosis