最新刊期
卷 24 ， 期 8 ， 2011
- 摘要：As a special biological resource,the development of hemp is involved in many fields and its industrialization will give an impetus to national economy.Based on study of hemp cropping and structure and properties of fiber,fine processing of hemp fiber,industrial application of stem and comprehensive utilization of seed have been well researched.With the help of previous work,first hemp industrialization station in world is building and it will contribute to an eco-friendly process and technology improvement of associative industry.关键词：Hemp;Structure;Property;Processing technique;Industrialization
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发布时间：2022-09-18 - 摘要：Organic-inorganic nanoparticle ionic materials (NIMs) are hybrid materials comprising a nanoparticle core functionized with a covalently tethered ionic corona.NIMs can be tailored over a broad range from glass solids to free flowing liquids by varying geometric and chemical characteristics of the core and corona such as content,size and shape of nanoparticles,molecular weight and grafting density. Liquid-like nanoparticle ionic materials have high-refractive-index,zero-vapor pressure,high heat conductivity.Besides,NIMs are chemically and thermally stable and ionically conductive.They are therefore excellent candidate in immersion photolithography,high-conductivity lubricants,high efficiency coolants,engergy supply,storage,production and so on.Progress in synthesis and applications of liquid-like nanoparticle ionic materials is reviewed in this review.And the problems and promising future are prospected.关键词：Nanoparticle ionic materials (NIMs);Conductive lubricants;Immersion lithography;Rheology;Dynamics
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发布时间：2022-09-18 - 摘要：Thin film lithium battery is a very important micro energy device,which has showed tremendous potential application.In order to further improve the performance of the thin film battery,it requires better assembling method.Layer-by-layer (LbL ) technique provides a simple,safe and affordable route in assembling thin film electrolytes and electrodes.The technique is very important to construct nanoscale thin film which has showed unique property compared with bulk film.Here,we review the design of LbL films for electrolytes and electrodes and recent progress.Furthermore,material choice is significant to affect the properties of LBL battery.Hence,we review the recent progress of LBL film battery incorporating carbon nanotubes(CNT) due to its excellent electronic property.关键词：Layer-by-Layer;Thin film;Lithium battery;Ionic conductivity;Carbon nanotubes
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发布时间：2022-09-18 - 摘要：Ionic liquid 1-ethyl-3-methylimidazolium acetate ([ EMIM] Ac),which has stronger ability to dissolve cellulose especially, can be used to dissolve natural polymer and many other polymers. As the dissolving process of cellulose causes no degradation, [ EMIM] Ac can be used as an effective solution in dissolving and processing of cellulose. Compared with other solutions, [ EMIM] Ac has many advantages of use safety, no pollution to environment and easy recovery recycling, and has wide application prospect in the dissolving and spinning of cellulose. Various preparation methods of [ EMIM] Ac and their advantages or disadvantages are introduced in this paper, which have a guiding significance to the preparations of other acetic acid salts ionic liquid. And the application research of [ EMIM] Ac in cellulose dissolving and spinning is summarized.关键词：Ionic liquid;Preparation;Cellulose;Dissolution;Spinning
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发布时间：2022-09-18 - 摘要：Co-continuous morphology is a typical structure of immiscible polymer blends.Due to the synergy effect between the components,immiscible polymer blends with co-continuous structure usually exhibit improved mechanical properties,thermal properties,electrical properties and barrier properties etc.The quantitative prediction of the properties of co-continuous blends is of great significance both in industrial application and in academic research.In this review,various prediction models which are applicable for co-continuous blends currently are summarized,including the series-parallel model,Kerner model,Davies model,Halpin-Tsai model,EBM model,SISS model,KISS model,Doi-Ohta model and Yu model.The principle,applications and characteristics of these models are reviewed and discussed.关键词：Prediction Model;Co-continuous;Morphology;Property;Blends
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发布时间：2022-09-18 - 摘要：Humic acid(HA) is the major component of humic substances of soil and has many kinds of functional groups. With further development of basic and applied research, HA, as a biological active substance, has been introduced into superabsorbent. The as-prepared superabsorbent has the functions to improve soil, enhance fertilizer efficiency, simulate growth, enhance resistance and improve quality, as well as to improve water absorbency and salt-resistant properties while reducing significantly the preparation cost. This article reviews the research work of superabsorbent with HA in recent years, including the classification, HA release mechanism and application of the superabsorbent. Moreover, a few proposes are presented for the future development of the supe rabsorbent with HA.关键词：Humic acid;Superabsorbent;Classification;Release;Application
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发布时间：2022-09-18 - 摘要：With the stress of solid phase stress,the polymer molecule structure would be weakened or destroyed,and the chemical bonds may be distorted or broken.Polymers of solid phase chemical modification are used to study the physical and chemical changes of various polymers,which occur duing to mechanical effect.As the method has wide applicability,purity product,ease of operation,high efficiency,easy,saving energy,no pollution and so on,it becomes one of the important methods of polymer modified.This ariticle systematically review the mechanism and methods of the solid state shear pulverization of polymer,polymer solid-phase disc-type milling grinding,crushing mechanism of polymers and high-energy ball milling,detailly describe technology progress of these types of grinding methods on the application of polymer modified,and indicate the stress on the theory and trends in the application of key technology of solid-phase chemical modification of polymer.关键词：Polymer;Solid state mechanochemistry;Solid state shear;Pan-milling;High-energy ball milling
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发布时间：2022-09-18 - 摘要：During the polymer material synthesizing process,polymer synthetic technologies can make polymer materials be composed of various lengths of molecular chains,which leads to the molecular weight distribution is polydisperse.However,this polydispersity will result in different influence on the phase behavior of different polymer blending systems.In this paper,the importance of researches on the effect of polydispersity on the phase behavior of polymer systems is described.The effect of polydispersity on the phase behavior of polymer solution,block copolymer,polymer-polymer blends,colloid-polymer blends are reviewed and the directions of future research in this field are proposed.关键词：Polydispersity;Phase behavior;Polymer systems
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发布时间：2022-09-18 - 摘要：Enzyme membrane reactor that contains an enzyme and a membrane with the appropriate pore size and physicochemical propertiesis a new type of bioreactor, in which continuous reaction occurs simultaneously with separation of the product from the reaction mixture. Membrane bioreactor has some advantages in the field of resource saving, environmental protection and clean production in biocatalysis, and has already become one of the hottest research fields these years. The basic concept, feature and classification of enzyme membrane reactor were generally described, and some applications in biocatalysis field and examples were reviewed. The current problems and the future tendency were discussed.关键词：Enzyme membrane reactor;Feature;Classification;Biocatalysis;Application
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发布时间：2022-09-18 - 摘要：Low-temperature phase change materials have been widely applied in the fields of energy conservation and thermal control. The synthesis, compound and shape-stabilizing technology of these materials keep developing and have been a highpoint of material researches. The methods and technologies of preparing shape-stabilized phase change materials are reviewed, and the progress of porous matrix adsorption method, polymer matrix composited method, micro-encapsulation technology and other shape-stabilizing technology are introduced in this paper. Three aspects are the focus of microencapsulat ion technology: in-situ polymerization, interfacial polymerization and coacervation. Additionally, the advantages and disadvantages on the preparation methods are analyzed. The prospective application and development in shape-stabilized PCMs were anticipated.关键词：Phase change materials;Shape-stabilizing technology;Microcapsules
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发布时间：2022-09-18 - 摘要：In order to obtain nano/micro-structured organic-inorganic composite with unique properties for nanoelectronic/microelectronic device applications,a study on growth of ZnO using hydrothermal synthesis approach in the presence of suspension containing polyaniline nanowires was carried out.A series of characterizations were examined by transmission electron microscopy(TEM),the Fourier-Transform Infrared spectra(FTIR),X-ray diffraction(XRD),X-ray photoelectron spectroscopy (XPS),etc.The results indicated that the resulting-product was ZnO/PANi composite nanowire structure.The charge transfer was possibly taken place at the interface between ZnO and polyaniline nanowire.A chemical prototype sensor was constructed based on ZnO/PANi composite nanowire and an interdigital electrodes on flexible polymer substrate.The gas-sensing behaviors of the sensor to ammonia and HCI gas at room temperature were investigated.Results showed that the effects of the presence of ZnO on the sensitivity of polyaniline based chemical sensors were remarkably.This proved further that the strong interaction between ZnO and polyaniline was existed.关键词：ZnO/PANi Composite Nanowires;Interface;Charge transfer;Chemical Sensor;Property Examination
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发布时间：2022-09-18 - 摘要：Using hexachlorocyclotriphosphazene (HCCP ) and 4,4′-sulfonyldiphenol (BPS ) as comonomers,triethylamine(TEA)as acid-acceptor,and polystyrene(PS)microspheres prepared through dispersion polymerization as template,PS/polyphosphazene(core/shell)composite microspheres were firstly prepared at room temperature.The as-prepared composite microspheres were then etched with tetrahydrofuran to remove PS core materials,and hollow polyphosphazene microspheres were successfully obtained.The morphology and structure of the hollow microspheres were characterized by FTIR,EA,SEM and TEM.Results showed that the hollow polyphosphazene microspheres possessed highly cross-linked chemical structure.The hollow core size of the hollow microspheres was depended on the diameter of as-used PS template,and the shell thickness could be controlled by adjusting the mass ratio of PS to comonomers.In addition,the formation mechanism of the hollow polyphosphazene microspheres was proposed.关键词：Polyphosphazene;Hollow microsphere;Self-assembly;Template
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发布时间：2022-09-18 - 摘要：The transmittance tests and the polarized microscopy were used to investigate the orientational structures of azobenzene-containing side-chain liquid crystalline polymer upon linearly polarized light(LPL)and circularly polarized light (CPL)irradiation.The results suggest an in-plane arranged single-domain order phase was achieved upon the LPL irradiation,which showed a black cross interference figure.The figure disappeared upon less than 10° rotation of the stage.As a contrast,CPL pumped film showed centered conoscopic interference figure upon a perpendicular light irradiation.The off-center distance of interference figures depends on the incident angle of the CPL beams.The annealed film showed a fixed conoscopic image with its optical axis perpendicular to the film plane,suggesting that oriented azobenzene mesogen belongs to the uniaxial type of anisotropic unit.关键词：Conoscopic interference figure;Liquid crystalline polymer;Orientation
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发布时间：2022-09-18 - 摘要：Polysilane is a kind of polymer with it' s backbone consisting of silicon atoms only. It can be used as opto-electronic materials and the precursor of ceramic. Electrochemical reduction is a novel synthetic method of polysilane, which was developed recently years and possesses good prospect. It is through cathodic reduction of chlorosilane in electrolysis cell to obtain polymer, it can broaden the scope of functional polysilanes, since the reaction conditions are mild. This review presents a brief account of the electrochemical synthesis of polysilane, including the implementation method, the influence factors such as cell type, electrode material, supporting electrolyte and solvent, the switching time of electrode, the distance of electrodes, electric current density. The synthesis mechanism and the recent research evolution were introduced too.关键词：Polysilane;Electrosynthesis;Mechanism
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发布时间：2022-09-18 - 摘要：In this paper, the concept, principle and treating methods of low temperature plasma technique and its application in the surface modification of ultra high molecular weight polyethylene (UHMWPE)fibers were introduced. The recent research on the surface modification of UHMWPE fibers was summarized. In addition, the influencing mechanisms of gas plasmavariety, treating power and treating time on the plasma treating effects were further expound. Moreover, a brief introduction of the continuous plasma treatment has been recommended. After plasma treatment, the interfacial adhesive properties between UHMWPE fiber and resin matrix and the wettability were obviously improved owing to the enhancement of the roughness and crosslinking on the surface of fiber.关键词：Low temperature plasma;Ultra high molecular weight polyethylene fibers;Surface modification
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发布时间：2022-09-18 - 摘要：Picture/chart teaching method was a favorable supplement to the traditional teaching method of polymer physics.Pictures or charts combined with the miscellaneous and intertwined theories of polymer physics and strengthened the grasping of students’knowledge.Examination paper analysis showed that picture/chart teaching method upgraded the teaching effect.Finally,some ideas were put forward to further improve the picture/chart teaching method.关键词：Polymer physics;Picture/chart teaching method;Teaching effect
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发布时间：2022-09-18 - 摘要：Based on extensive investigation and the advantage subject of materials science in Zhengzhou University (ZZU), the materials chemistry specialty is considered to be oriented as the combination of chemistry and polymeric materials. Taking the curriculum settings of materials chemist ry specialty in some famous universities as references, the education plan for materials chemistry specialty in ZZU is constructed to cultivate students with interdisciplinary knowledge about chemistry and polymeric materials. Accordingly, the curriculum settings of chemistry and polymeric materials were optimized to gether with strengthened practical training programs. Meanwhile, the outline for almost all the major courses was revised. The graduates of materials chemistry specialty hopefully will be high-quality interdisciplinary talents in chemistry and polymeric materials.关键词：Materials chemistry;Major orientation;Polymeric materials;Curriculum system
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发布时间：2022-09-18
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