最新刊期
卷 32 ， 期 10 ， 2019
- 摘要：Polysiloxanes with aggregation-induced Emission(AIE) have non-traditional conjugated groups,and silicon imparts excellent photophysical properties and outstanding biocompatibility. In recent years,we have reported a series of hyperbranched and linear polysiloxanes containing double bonds,hydroxyl groups, amine groups and epoxy groups, and found some variety rules between the luminescence properties and its structure of polysiloxanes. However, it is still a challenging to explore the emission mechanism and reveal the relationship between structure and luminescence properties of polysiloxanes. In this paper, a series of factors affecting the luminescence properties of polysiloxane are discussed, and its emission mechanism is explained by density functional theory (DFT) and time-dependent density functional theory (TD-DFT),then the concept of "Silicon Bridge Enhanced Emission" (SBEE) is proposed. At last,the polysiloxanes application is described briefly, and the future research directions of polysiloxanes are pointed out.关键词：Polysiloxane;Hyperbranch;Aggregation-induced emission;Fluorescence;Density functional theory(DFT)
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发布时间：2022-09-05 - 摘要：Nanochannels play an important role in the living life. Learning from Nature, biomimetic properties of polymer-based nanochannels, such as ions/molecules transportation, recognition, response and gating, has attracted extensive attention. At present, the track etching technology is the most commonly used method to construct polymer-based nanochannels. After the etching, the surface of solid-state nanochannels was endowed with an accumulated number of functionalized groups. Moreover, the modification method of nanochannels has been extensively considered and investigated. In this review,the preparation and process of nanochannel are summarized, which is focused on etching polymer and constructing nanochannel. At the same time,the functionalization technique for nanochannel are also summarized. Finally, this review also point out the bionic nanochannels' applications and prospects. Meanwhile,the existing challenges in this filed are introduced.关键词：Polymer-based nanochannels;Track etching technique;Functionalization;Modification
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发布时间：2022-09-05 - 摘要：Polyhedral oligomeric polyhedral polycystoidosiloxane (POSS) are a kind of intermolecular organic-inorganic hybrid materials consisting both Si—O—Si cage-shaped three-dimensional inorganic structure and organic groups (Rs)bonded to silicon atoms. Since it not only has high strength and temperature resistance, but also has flexible molecular designability, it can be widely used in the modification of polymer. Reactive POSS refers to that the organic groups on POSS have high reactivity with its modified polymer, which can covalently bond polymer molecules, improve the dispersion of POSS in polymer matrix, enhance its interfacial adhesion,and improve the performance of the polymer to a greater extent. In this paper, the synthesis of reactive POSS, the progress of POSS in polymer toughening and reinforcing, heat-resistant and flame-retardant properties, dielectric properties modification are reviewed,and the progress of POSS in improving the dispersion properties of inorganic nanoparticles in polymer modification system is also summarized.关键词：Reactive POSS;POSS polymer;Toughening and reinforcing;Heat and flame resistance;Dielectric properties
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发布时间：2022-09-05 - 摘要：This review introduced polymer-based and polymer composite-based microcellular materials by means of supercritical CO2 foaming process,and summarized their electromagnetic interference shielding effectiveness (EMI SE)depending on numerous reports composed of the research of ours and others. Various types of polymer systems, including unitary-and multi-thermoplastic polymer systems as well as thermosetting polymer system were reviewed to sum up foamability, cellular morphologies and foams' properties and also to optimize cell parameters (cell size and average cell density) by blending,copolymerization, crystallization and cross-linking and foaming process consideration. And then, thermoplastic and thermosetting polymer matrices modified with carbon nanofillers were foamed by scCO2 to fabricate corresponding microcellular composite materials,where the interaction between cells and carbon nanofillers was mainly concerned. In foams containing cells and carbon nanofillers,conductive networks are easier formed because the influence of cell growth on nanofillers' redistribution caused them reaggregate and originate along cell walls and thus interconnection. Ultimately, some understandings and perspectives the outstanding electrical conductivity of microcellular composite materials with respect to the development and application of microcellular polymer and polymer/carbon nanofillers materials in the future.关键词：Supercritical CO2;Microcellular foaming;Cellular morphology;Polymer/carbon nanofiller composite;Electromagnetic interference shielding
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发布时间：2022-09-05 - 摘要：Magnetic protein-imprinted composite microspheres (MPIPs) have important application value in protein separation and detection owing to their specific recognition and efficient separation of target proteins. However, due to the structural properties of protein molecules,magnetic imprinted materials still face many challenges on improving their preparation and performance. This paper reviews the progress in preparation methods of MPIPs and the design strategies for improving their imprinting efficiency. And the applications of MPIPs in the fields,such as, protein separation, immunoassay and biosensing are also summarized.关键词：Protein imprinting;Magnetic composite microspheres(MPIPs);Separation efficiency;Specific recognition
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发布时间：2022-09-05 - 摘要：Silicon-containing polymers are important precursors for preparation of high performace ceramics. Polymer-derived ceramics possess obvious advantages in preparation of non-oxide ceramics and their composites. In this paper,the polysilane with unsaturated groups,linear and hyperbranched polyborosilazane and metal-containing polymers are illustrated in view of the molecular design and synthesis. And the frontier and progress of polymer-derived ceramics in the application of microwave absorption materials,lithium battery anodes and 3D printing are also presented.关键词：Polymeric precursor;Polymer-derived ceramics;Polyborosilazane;Microwave absorption;3D printing
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发布时间：2022-09-05 - 摘要：Optoelectronic polymers are widely application in polymer light-emitting diodes (PLEDs), polymer solar cell, polymer laser, polymer field-effect transistor due to their excellent optoelectronic property, easily structural modification and their flexibility and convenient, also defined as fourth-generation polymer. Similar to the traditional polymer, the properties and applications of optoelectronic polymers are dominated by their hierarchical structure, such as short range structure (molecular structure),long-range structure (molecular behavior and conformational transition),third level structure (condensed structure) and high level structure (multi-condensed structure to induce novel properties and behaviors for outstanding applications). This review also summarizes recent progresses in studies of the hierarchical structure in optoelectronic polymer, and proposes that it is a key strategy to improve performance, stability of plastic optoelectronic devices,关键词：Optoelectronic polymer;Herarchical structure;Supramolecular interaction;Photophysical behavior;Plastic optoelctronic devices
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发布时间：2022-09-05 - 摘要：A new reduction strategy for quantum dynamics study on the motion of large periodic cyclic molecules is proposed. On the basis of the path-integral quantum mechanics,in this work we show an equivalence relation between large periodic cyclic molecular motion and monomer motion. And hence, to computational study the large molecular motion based on the existing computing resources,only the motion of a single monomer needs to be accurately calculated. This strategy may greatly reduce the system degree of freedom and hence the computational cost,which implies an improvement of the computational cost efficiency.关键词：Cyclic;Period;Large molecule;Path integral;Simplification
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发布时间：2022-09-05 - 摘要：The epoxy fabric coating with excellent hydrophobic and antifouling properties was prepared by a simple dip coating method using epoxy coating solution, which epoxy resin (EP) was as the resin matrix,octadecylamine as the curing agent and polytetrafluoroethylene (PTFE) particles as filler. The wettability and surface morphology of the hydrophobic fabric were characterized by contact angle measuring instrument and scanning electron microscope(SEM). The effects of immersion time and the addition of PTFE particles on the hydrophobic properties of the fabric coating were analyzed. The optimum process conditions were determined and the stability and oil-water separation efficiency of the hydrophobic fabric was studied.关键词：PTFE nanoparticle;Curing agent of octadecylamine;Superhydrophobic;Superhydrophilic;Oil-water separation
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发布时间：2022-09-05 - 摘要：In this study, bisimide-containing diamine monomer (BIDA) was synthesized by using 6FDA and ODA as starting materials. Thermoset polyimide (PI) thin film containing dynamic imine bonds was then fabricated by reacting BIDA with terephthalaldehyde and tris(2-aminoethyl)amine via amine-aldehyde condensation reaction. The resulting PI thin film exhibited outstanding thermal stability and high mechanical strength, whose glass transition temperature as well as thermal decomposition temperature were up to 224℃ and 385℃,and tensile strength was above 90MPa,tensile modulus 2.16GPa, the highest value of the reported dynamic covalent polymers. The stress relaxation behavior of the film at different temperatures was investigated by dynamic mechanical analyzer,and the activation energy of the dynamic PI was calculated to be 222. 7kJ/mol. In this study, the primary amine-promoted mechanism was utilized to realize the rehealability of the thermoset PI films under mild conditions. The designing concept is expected to expand to other dynamic covalent polymer systems,and it is also expected to open many new possibilities for future development of novel high-performance, malleable, and rehealable thermoset polymers.关键词：Thermoset;Polyimide;Imine bond;Dynamic covalent;Rehealable
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发布时间：2022-09-05 - 摘要：Conjugate porous polymers (CPPs) are emerging organic semiconductors of large conjugation and porosity, in which aromatic units are conjugatedly linked to produce pores and/or channels. Both the electronic structures and porosities of CPPs can be engineered through designing aromatic monomers, endowing CPPs as a new research platform for energy conversion and storage. This review describes the molecule design strategies,synthesis and porosity regulation methods of CPPs. The current state-of-the-art of energy applications of CPPs, including efficient photocatalytic systems, dense secondary ion batteries and supercapacitors, are subsequently reviewed. Our own opinions on the shortcomings and challenges of CPPs for energy storage are also presented. In the end, a perspective of CPPs for large-scale and low-cost clean energy acquisition and energy storage is provided.关键词：Polymer semiconductors;Energy storage;Porous polymers;Secondary batteries;Photocatalysis
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发布时间：2022-09-05 - 摘要：Protein-polymer conjugates are obtained by modifying proteins through non-covalent interactions and covalent bonds, which can effectively regulate the stability and functionality of proteins. Due to the design flexibility of polymer structures and the diversity of protein functions, protein-polymer conjugates have broad application prospects in the field of biological materials. In this paper, the preparation methods and the latest progress of protein-polymer conjugates are reviewed based on the related literatures at home and abroad in recent years.关键词：Bioconjugates;Proteins;Polymers;Biomaterials
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发布时间：2022-09-05 - 摘要：This review focuses on the recent progress of self-assembly and functionalization of protein-based macrocycles. Taking the most popular protein macrocycles as example, the structural features,fabrication strategies and functions of these well-explored protein-macrocycles were analyzed and compared. As a new kind of biogenic polymeric macrocycle, protein-macrocycles serve as the evolutionary product of biopolymer science and macrocyclic chemistry. The protein-macrocyclic structure provides a novel design material and construction platform for fabrication of functional polymers. With the accumulated knowledge of kinetics and thermodynamic behaviors, the manipulation of the self-assembly process of protein-macrocycles will become skilled.关键词：Protein-Macrocycle;Biopolymer;Macrocycle;Self-assembly
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发布时间：2022-09-05 - 摘要：The miktoarm star copolymers may exhibit unique architectures and properties, because of their arms consisting of polymer chains with different structures and properties. This paper will review recent progress in miktoarm star copolymers in terms of synthesis methodologies, microphase separation and self-assembly and their applications.关键词：Miktoarm star copolymer;Synthesis methodologies;Microphase separation;Self-assembly;Applications
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发布时间：2022-09-05 - 摘要：Under certain external stimuli, the photonic crystal hydrogel will change the volume of the hydrogel, which will cause the photonic band gap with responsing. The use of photonic crystal hydrogels to detect metal ions has become a hotspot in the field of sensing and detection, and provides a possibility for real-time detection of metal ions. In this paper, the detection of metal ions in photonic crystal hydrogels is reviewed and proposed.关键词：Photonic crystal;Metal ions;Determination;Sensor;Hydrogel
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发布时间：2022-09-05 - 摘要：Bacterial infections threaten the life and health of human beings. Overuse of antibiotics and slow development of traditional antibiotics have caused the emergence of drug-resistant bacteria,driving the need to develop new antimicrobial compounds. Using chemical methods to synthesis antimicrobial polymers and construct the delivery systems for antimicrobial drugs plays a significant role in fighting against drug-resistant bacteria. In this work, the recent research progress in the design and synthesis of various antimicrobial polymers, as well as their preliminary application attempts were reviewed. And the future research directions of antimicrobial polymers in solving the bacterial resistance crisis were also prospected.关键词：Drug-resistant bacteria;Antibiotics;Antimicrobial peptides;Antibacterial polymers;Anti-infective coatings
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发布时间：2022-09-05 - 摘要：Colorless transparent polyimide (CPI) film is one of the most promising polymer materials for flexible optoelectronic devices, due to its excellent heat resistance and high transparency. In this paper,the polymerization methods and types of CPI are firstly reviewed. The advantages and disadvantages of full-aromatic CPI, semi-aromatic CPI and full-aliphatic/alicyclic CPI are then compared, and the research progress on semi-aromatic CPI is especially highlighted. An overview of CPI's advanced application in the cover of flexible display panels, substrates for flexible display devices,and thin film solar modules is also provided.关键词：Colorless;Transparent;Polyimide;Flexible substrate;Optical display
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发布时间：2022-09-05
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