摘要:Electroactive and electrically conductive polymers,which can ideally conduct bioelectrical signals in vivo,have shown potential applications in the culture of excitable cells and as electroactive scaffolds for neuronal or cardiac tissue engineering.In this paper,the new research progress of electroactive,biodegradable aniline oligomer grafted copolymers,block copolymers and cell culture were introduced.Recent progresses of electrospinning fibre are reviewed. The materials which are electroactive,remarkably biocompatible and biodegradable,were designed and synthesized by covalently grafting or block-copolymerizing aniline oligomers onto or with biodegradable polymers.The properties of these copolymers are promising for biomedical applications both in vitro and in vivo.Some potentially rewarding research directions are suggested.
摘要:Polyhydroxyalkanoates (PHA)are poly esters synthesized by a variety of bacteria with diverse structures. Because of the similar properties to traditional plastics, PHA have at tracted at tentions as novel biotechnolo gical products. In addition, PHA are bio-renewable, biodegradable and biocompatible. This review focuses on recent developments on PHA production and applications, including the fermentation, material characterization, derived products of PHA, extraction and purification as well as the status of PHA industry in China.
关键词:Polyhydroxyalkanoates;PHA;Industrial value chain;Production
摘要:Photoinduced reversible surface-relief-gratings (SRGs) on the azo polymer films have aroused extensive research interests in recent years.Soft-lithographic methods have been well-known as a powerful tool for preparing various nano/microstructures.Combining photo-fabrication of SRGs and soft-lithographic methods has offered a new processing method to develop SRGs with various functional materials.This new approach can lead to potential applications of SRGs in solar cells,liquid crystal display and optical sensing.This article reviews the research progresses in the SRG photo-fabrication, the soft-lithographic duplication methods and applications.Related background and literature are given at the same time and discussed in some details.
摘要:Hen Eggshell is an abundant natural proteinous resource,and can be readily obtained almost anywhere as waste.As an important consistence of eggshell,eggshell membrane is a kind of natural biomaterial with excellent properties and great potential to be used in many fields.Here,we review our research work on eggshell membrane protein in the latest few years,including isolation of soluble eggshell membrane protein from natural eggshell membrane and its application in the preparation of a variety of biocompatible materials.
摘要:A series of representative work regarding CNTs filled conductive polymer composites in our research group is introduced.The multi-phase and multi-component systems are created by incorporating inorganic powders,polymer components and other carbon fillers into single polymer/CNT system to regulate the localization of CNTs in the composites,thus the technological methods to improve the conductivity of the composites are built.The conductive mechanism of the systems is also investigated.
关键词:Carbon nanotubes;Multi-phase and multi-component system;Conductive composites;Polymer
摘要:Surface-directed phase separation (SDPS) is a nonequilibrium phase transition of mixtures induced by the wetting behavior of the surface.In this paper,the phase morphologies,evolution dynamics,wetting layer formation mechanisms in SDPS and the novel phase structures of SDPS under the spatial confinement have been reviewed.The dynamical models for SDPS based on the Cahn- Hilliard-Cook theory as well as the progress for the numerical simulation by using these models have also been introduced.
摘要:Linker chemistry is a kind of effective approach for polymer synthesis,which possesses high activity,high yield,high selectivity,and is sensitive to the specifically groups,fits for the link or ligation of the polymers and connect with molecules.This review introduces and summarizes our progress on synthesis of functional polymers with well-defined structure via linker chemistry.The linkages include condensation reaction,ring-opening reaction,click chemistry,and reversible linkages. Finally,a proper prospect of the development of linker chemistry has been discussed.
关键词:Linker chemistry;Polymer;Well-defined structure;Controlled polymerization;Controlled function
摘要:The durability of polymer compo sites is of crucial impor tance, no matter in scient ific and techno logical point of view. Many involved problems are little understo od and need thoroug hresearch. First is the stability of polymer it self and the key factors. The second is the interaction between inorganic fillers and polymermatrices and its effect on aging behavior of polymer composites. The effect of surface treatments of inorganic fillers on the interaction is also concerned. In addition, the heterogeneity nature of photo-oxidationreaction and the degradation distribution in the composites need careful consideration. In this paper, the current progress in thepho to-oxidation degradation behavior and mechanism of polyolefin composites have been reviewed, with an emphasis on HDPE filled with common mine ralfillers, PE and PP filled with nano fillers such as Al2O3, SiO2, CaCO3, TiO2 and ZnO.
摘要:Graphitic carbon nitrides are polymers with graphite-like conjugated layer structures, which are formed mainly v ia the combination of carbon and nitrogen elements.Due to the graphite-like conjugated planes of these polymers,a variety of nanostructure materials could be synthesized,such as spherical,tubular,ribbon-like and mesoporous nanomaterials.These materials have various unique properties including low density,high hardness,chemical inertness,biocompatibility,and special optical and electrical characters.Therefore,they have wide applications as catalysis,biotechnology, gas storage,superhard materials,optical and electronic materials,metal anticorrosion.This review summarizes the synthetic methods of graphitic carbon nitrides and the latest progress in fabricating their nanostructures.The effects of preparation conditions on structures,morphologies and properties of these nanomaterials will also be discussed.
摘要:Nucleic acid/polymer hybrids are reviewed including their design, synthesis, characterization and application in recent years. Special efforts have been taken in the introduction of nucleic acid/polymer hybrids' synthesis and application in DNA detection, biomedicine and nanoscience, these literature work indicated the the good potential application of nucleic acid/polymer hybrids in nanoscience and material chemistry.
摘要:Poly (butylene succinate) (PBS) as one of most important biodegradable polymers are paid lot of concerns in its synthesis and modification.The use of biodegradable polymers can decrease "White Pollution" caused by using of common polymers,such as PP,PE and etc.In this paper the polycondensation methods and process of PBS are reviewed.In order to enhance their properties and extend their application fields,the physical and chemical modifications of PBS are also given an introduction.
摘要:Hollow microspheres have been intensively attractive in many fields due to their specialties of low density,high specific surface area and capacity of accommodating object molecular. This review focused on the preparation techniques of hollow microspheres prepared with different materials including polymer,inorganic and polymeric/inorganic composite materials.In addition, thermo-expandable microspheres which form hollow structure in the process of application were introduced.
摘要:Interests have been worldwidely and intensively focused on waterborne polymer products such as coatings,paints and adhesives because of their environmentally friendly property,relatively low cost,as well as resource and energy savings.As film-forming materials,waterborne polymer emulsions are of the most importance for these products.In order to make the properties of waterborne products to the level of corresponding solvent-type products,crosslinking techniques have been successfully used in the preparation of waterborne products.In this paper,one-component ambient crosslinkable polymer emulsions were reviewed based on crosslinking mechanism according to the literature and the previous work,and some important systems and new progresses in this field were emphasized.
摘要:Supramolecular polymers are formed of monomeric units via reversible non-covalent bonds,including hydrogen bonds,π-π interactions,metal ligand binding and so on.Owing to the directionality and strength of the supramolecular bonding,such polymers exhibit many useful functional properties,such as stimuli-responsiveness and self-assembly of nanostructures.This paper described the advances of multiple hydrogen bonding supramolecular polymers in modifying polymer properties, self-assembling molecular architectures,self-assembling nanostructures and so on during the past three years.The application of such polymers was mentioned as well.
摘要:Drug delivery has matured and become an engineering science,which utilize basic principles of material science to design the delivery system according to the pharmacology requirements. Since polymer is essential for most of the drug delivery systems,it is important to understand how polymer principles are used to study drug delivery and develop new technologies.Here we used drugpolymer solid dispersion and polymer drugs as two examples to emphasize that the structure-property relationship,the central dogma of polymer science,is also the key for drug delivery.
摘要:Polymer banded spherulites have attracted intensive interest due to their intricate organization in the past half century.Understanding on banding mechanism of polymer spherulites is becoming deeper and deeper,thanks to the great efforts of the researchers.However,there are still some questions unsolved.In this article,an overview of the formation mechanism of polymer banded spherulites is outlined.We will focus on organization of lamellar crystals in the banded spherulites and the drive force for lamellar twisting. Banding mechanism of chiral polyhydroxyalkanoates is summarized.Finally,the remained questions are put forward for future research.
摘要:As a new type of photoresponsive compound, dithieny lethene has excellent thermal stability and fatigue resistance. Irradiation with appropriate wavelength of light, the dithieny lethene can undergo reversible photocy clization between colourless open-ring isomer and coloured closed-ring isomer. At the same time, many molecular properties will also be chang ed reversibly, such as ref ractive index, dielectric constant, electrochemical properties, and soon. It can be used in optoelect ronic devices such as memory media, optical switches and sensors. For practical applications, the dithienylethenes should be incorporated into polymers that can be easily fabricated into films, sheets, or beads. This microreview provides an overview of the prepared dithieny lethene based polymers.
摘要:Polyurethane is the most widely studied and applied biomaterial for its excellent mechanical properties,good stability and reasonable biocompatibility at present.But its unsatisfactory biostability and biocompatibility result in limitation of application in the biomaterial fields.Because the biocompatibility of materials is positively correlated with its surface properties,the modification of the surface of polyurethane has been as an important research direction in the area.This paper introduces the structure characteristics and the development of synthesis of polyurethane as biomaterials.All kinds of them were analyzed in details.Then the modification methods of enhancing biostability and biocompatibility of polyurethane biomaterials were discussed.