最新刊期
卷 24 ， 期 2 ， 2011
- 摘要：Conjugated polymers have a strong ability to capture light,which can be used to amplify the fluorescence signal and greatly improve the detection sensitivity.Conjugated polymer-based biosensing systems have important applications in understanding the information transfer in biological systems,especially in the early diagnosis of disease.Because of good chemical and thermal stabilities , high fluorescence quantum yield and easy modification,in recent years,water-soluble polyfluorene derivatives have been widely used in the field of biosensing.In this review,the design,synthesis and properties of water-soluble polyfluorene derivatives and their applications in sensitive biological detection are introduced, and finally futuret rends in this area are discussed .关键词：Water-soluble polyfluorenes;Design and synthesis;Optical properties;Biological detections
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发布时间：2022-09-18 - 摘要：There are headstream pollution problems for the traditional viscose fiber production process,so it is necessary to develop the new solvent process for regenerated cellulose fiber,to be as a staple variety of future fiber materials. In the multitudinous developed solvent systems for cellulose, the solvent system of NMMO (N-methylmorpholine-N-oxide) has been applied into large scale industrial production; the developments of cellulose carbamate, sodium hydroxide or lithium hydroxide/thiourea or sodium zincate or (and) urea/water solution,ionic liquid systems have also made remarkable progresses. In the industrialization technologies of organic solvent process of regenerated cellulose fibers represented by NMMO process,the continuous dissolving technology of film evaporation pushed forward in vacuum has comparison advantages; for spinning methord it is all the dry-jet wet-spinning; the development direction for solvent recovery technology is high efficiency evaporation combined with other energy saving technologies in concentration process; the on-line crosslinking technologies before drying are adopted in large scale productions for the control of fibrillation.关键词：New solvent;Cellulose;Technological;Progress
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发布时间：2022-09-18 - 摘要：Recently , the problem of water pollution turns more and more serious, and it is one of the hottest research projects in the field of the wastewater treatment to search for the new technologies with the characteristics of high efficiency,low cost and nontoxicity.Straw materials are a type of crop wastes, which are rich in various natural polymer materials, such as cellulose and lignin.Furthermore, the resources of straw materials are not only abundant in nature,but renewable.However, until now, the usual treatment for the excess straws is still incineration,which is not only destruction of the atmospheric environment , but waste of resources .Undoubtedly , it is practical significance and economic value to apply the modified straw materials in wastewater treatment.In this paper, the modification methods for straw and their applications in wastewater treatment have been reviewed in detail .关键词：Straw;Modify;Water treatment
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发布时间：2022-09-18 - 摘要：Breath figure method is a novel approach to prepare ordered porous films. The method is carried out under high humidity,and uses high-volatile,non-water-soluble solvent. The temporary low-temperature caused by the rapid evaporation of solvent induces the water vapor to form an ordered array of droplets. By the guidance of the array,solute forms an ordered porous film spontaneously. The whole process is cheap and convenient. In order to promote the broad and deep investigation on this method,this paper aimed at the recent research of it,especially the characteristics for practical,and reviewed the progress in breath figure method's investigation on the formation mechanism,the selection of materials,the control of surface property and application of the films in recent years.关键词：Breath figure;High humidity;Ordered porous films
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发布时间：2022-09-18 - 摘要：Polyolefin catalyst technology is the key to the prosperity and advancement of polyolefins industry. Development of catalysts with high polymerization activities and selectivity for long chain α- olefins,which would deternmine the diversities of the polyolefin materials obtained,will be the main target in the future. This review introduced the recent progress of single site non-metallocnes based on group IVB transition metals for coordination polymerization of long chain α-olefins (1-hexene,1- ocetene,1-decene etc) . The structure of the ligand,crystal configuration,stability and catalytic performance of the complex,the relative molecular weight,polydispersity and the tacticity of the polymers produced were discussed in detail. The effect of the nature of the cocatalyst,temperature and solvent on the polymerization reactions was covered as well.关键词：α-Olefin;Coordination polymerization;Non-metallocene;1-Hexene;1-Octene
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发布时间：2022-09-18 - 摘要：The coalescence of multiphase polymer systems is a process which effective collision and coarsening behavior of dispersed particles happened after phase separation of thermodynamics incompatible polymer blending systems. In this paper,the phase coalescence mechanism and research methods of multiphase polymer systems and the coalescence behavior during processing were summarized. The coalescence process could happenned either in annealing conditions or in shearing conditions. Static coalescence means the aggregation of dispersed particles caused by multiphase polymers’s annealing under molten status. Flow driven coalescence means the aggregation of dispersed particles caused by polymers’s shearing flow under certain flow conditions. SALS (small-angle laser light scattering) is a in situ and in real time on-line observation technique,which is fit for theoretical research. Because it is inconvenient to use light scattering method in injection and screw,on-line sampling method was mainly used to research the coalescence of multiphase polymers during processing by TEM and SEM. Current coalescence researches were mainly focused on theoretical method of rheometer. Researches on coalescence behavior during processing were few although its was more significant in practice. Not only the research of regularity,mechanism and dynamical equation of coalescenceduring processing,but also the design of appropriate interfacial structure and processing technology to control the coalescence behavior of processing could achieve the stability of phase structure.关键词：Multiphase polymer;Phase morphology;Coalescence;Theory
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发布时间：2022-09-18 - 摘要：Poly (ε-caprolactone)s have been at tractive of the medical applications due to their advanced properties of biocompatibility and biodegradability .Poly (ε-capro lactone )s are prepared through the ring-opening polymerization of ε-caprolactone induced by metal complex catalysts,which play important roles in controlling the polymerization process and the structural features of resultant poly(ε-caprolactone)s , whilst catalytic systems affect the performance behaviors and the scopes of their potential applications.Therefore , it is critically important of finding a highly active complex catalyst, which could control structural properties of poly (ε-caprolactone)s , moreover , the catalytic system is required of low toxicity and good environmental compatibility.Herein the progress of metal complexes acting as catalysts in the ring-opening polymerization of ε-caprolactone is reviewed on the base of different metals and the coordination models of ligands used .关键词：ε-Caprolactone;Ring-opening polymerization;Metal complex procatalyst
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发布时间：2022-09-18 - 摘要：Based on the publications in aspacts of thermodynamics,kinetics,as well as hydrodynamics ,many modeling methods by advanced computer technology were analyzed and the numerical simulation of polymer membranes phase separation process were evaluated in this paper. From simple binary systems to complicated ternary and quternary systems,isothermal to non-isothermal mass transfer,application of self diffusion coefficients to mutual diffusion coefficients,one-dimention diffusion to2D or3D,the results from Monte Carlo,Lattice Boltzmann method,Cahn-Hilliard equation,material and energy equilibrium,dissipative particle dynamics and so on were investigated and analyzed. Dominated by different mechanism,several kind of mass and heat transfer phase separation models were detailed discussed,and important disadvantages were dedicated. The developments of phase separation numerical models were finally prospected from theoretical investigation to prectical application.关键词：Phase separation;Model;Simulation;Cahn-Hilliard equation;Lattice Boltzmann method
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发布时间：2022-09-18 - 摘要：Mesoporous molecular sieves (MMS ) have been used in many fields such as catalysis, absorption,separation and sensor along with optical, electrical and magnetic science, due to their uniform and order channel, large specific surface area and adjustable pore size.Recently, a lot of polymerizations were carried out in the channel of MMS, taking the advantage of their empty channels as the microreactor. The latest 20 years progress of the free radical polymerizations in the channel of MMS, including the regular free radical polymerization and active free radical polymerization were reviewed. The properties of the polymer and polymer/MMS composite were discussed.The polymerization mechanism and application need further investigated .关键词：Mesoporous material;Channel;Free radical polymerization;Progress
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发布时间：2022-09-18 - 摘要：This review concerned the modification development of hyaluronic acid (HA) in recent years. Modifications via chemical methods or composition to prepare the functional HA derivatives were discussed,and the further research prospect of HA was also described.关键词：Hyaluronic acid (HA);Chemical modification;Composition
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发布时间：2022-09-18 - 摘要：Polymer solar cells have received an upsurge of interest in solar cell field due to low cost, flexibility and strong molecular structure-designability of photovoltaic material.The key problem of cell commercialization is the low power conversion efficiency which can be largely affected by cell structure, properties of photovoltaic material and cell fabrication technology.In this paper, the principle of polymer solar cells was introduced and the progress in photo sensitive layer structure, as well as the varieties and applications of photovoltaic material of cells was extensively discussed.In the end, the development prospect of polymer solar cell was given from the perspective of improving cell efficiency .关键词：Solar cells;Photovoltaic material;Principle;Polymer photosensitive layer;Structure
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发布时间：2022-09-18 - 摘要：With the development of the application of cellulose, it is getting more and more importantly for the modification of cellulose and its derivatives .Atom transfer radical polymerization(ATRP) has been studied wildly because it's a live/controllable polymerization.The various cellulose grafted copolymers with some unique properties have been synthesized via ATRP.This paper summarized almost ten years literatures on preparing such new cellulose derivatives by ATRP and previewed their potential applications as well .关键词：Cellulose;ATRP;Grafted polymerization
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发布时间：2022-09-18 - 摘要：Poly (butylene succinate) (PBS) are polyesters with outstanding biodegradability. The basic physical and mechanical properties of PBS were introduced briefly in this article. Advances in modification research of biodegradation,biocompatibility,thermal and mechanical properties of poly (butylene succinate) were reviewed and the modification methods including copolymerization,blending, and so on,were presented emphatically.关键词：Poly (butylene succinate);Biodegradability;Modification;Copolymerization;Blending
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发布时间：2022-09-18 - 摘要：Some work and realization concerning the construction of data record and experimental report in courses "Experiments for Polymer Physics" was introduced in this paper.关键词：Experiments for polymer physics;Experimental report;Network Education
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发布时间：2022-09-18 - 摘要：Independent institute is a novel kind of high education which developed rapidly in the recent years due to its characteristic of self-establishment education system,flexible adjustment to the society and market,and paying more attention on the employment of the graduates.Specialty construction is foundation of teaching construction for higher education.In the recent years,practice and exploration from four aspects of increasing hardware devotion,streng thening teacher procession, optimizing cultivate scheme, modifying practice teaching system were performed the polymer material and engineering specility of Ningbo Institute of Technology, Zhejiang University,and made this specialty to achieve some scale and become a key speciality of Ningbo city.The rate of employment keeps at a high level of over 90% since its first graduates at 2006.Several suggestions,e.g. strengthening the teaching materials, establishing professional website teaching system, increasing students practical training,cultivating the spirit of innovation,cultivating double-qualified teachers, and set the master's degree or doctorate degree unit, are proposed for the further the speciality construction of polymer materials and engineering in the independent institutes .关键词：Independent institute;Polymer materials and engineering;Speciality construction;Practice;Consideration
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发布时间：2022-09-18
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