最新刊期
卷 36 ， 期 11 ， 2023
- 摘要：Porous organic polymers have the advantages of high porosity, adjustable pore structure, low cost and excellent structural stability, and have wide application prospects in high-pressure methane storage. Starting from the high capacity methane storage performance requirements of porous organic polymers, this article focuses on the latest research progress in pore structure design and synthesis of porous organic polymers, and forecasted the challenges faced and future development directions.关键词：Adsorbed natural gas;Porous organic polymers;Pore structure
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发布时间：2023-10-12 - 摘要：Bottlebrush polymers have been widely studied because of their unique molecular structures and broad application scenarios. The synthesis of bottlebrush polymers by covalent bonds grafting is time-consuming, difficult to synthesize and difficult to function. By non-covalent bonding, the side chains are easily attached to the mainchain, which provides favorable conditions for the construction of supramolecular bottlebrush copolymers. The introduction of supramolecular interactions not only brings flexibility in the preparation of bottlebrush polymer, but also makes materials more responsive, reversible and other functions. This paper introduces the construction and assembly of bottlebrush polymers mediated by supramolecular interactions such as hydrogen bond interactions, host-guest interaction, metal coordination and electrostatic interactions, their respective characteristics and construction strategies are analyzed and discussed, the huge application potential and important research significance of bottlebrush polymers mediated by supramolecular interactions are expounded. Finally, the current problems and future development are analyzed and prospected.关键词：Bottlebrush polymers;Supramolecular interactions;Self-assembly;Nanostructure;Morphology control
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发布时间：2023-10-12 - 摘要：Increasing concerns over water scarcity and pollution leads to growing research interest in advanced water purification technologies. Solar-driven interfacial evaporation, which is driven by clean solar energy for separation of water and impurities, has been considered the most eco-friendly and cost-effective technology to solve water shortage and pollution. Hydrogel-based materials with low evaporation enthalpy outperform most of other potential materials for photothermal conversion due to their breakthrough evaporation rates, processability, controllability and versatility. In this review, we first review the key concepts of hydrogels that show benefits in solar-driven interfacial evaporation systems, including water transport and low evaporation enthalpy. Secondly, we present the fabrication methods of hydrogel evaporators, the incorporated light absorbers, as well as the design strategies of micro/nanostructures for overall hydrogel performance enhancement. Finally, some of the multiple functions of hydrogel evaporators are introduced, such as salt-blocking, photo-degradation, sterilization, and electricity generation. Considering the benefits of the above hydrogel mechanisms and technologies, we further propose design concepts for hydrogel evaporators required in practical applications.关键词：Solar-driven interfacial evaporation;Hydrogel;Low vaporization;Design principle
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发布时间：2023-10-12 - 摘要：Supramolecular polymer is a type of assembly, defined as polymeric arrays of monomeric building blocks holding together by noncovalent interactions. Some characteristics of supramolecular polymer, like dynamic reversibility, stimulus-responsiveness as adaptiveness are arising from noncovalent interactions. Under the category of which, fluorescent supramolecular polymer generates via incorporating fluorophores into the assembly system, endowing itself special optical properties. In this way, these appealing properties enables fluorescent supramolecular polymer to be applied in different realms, such as fluorescent sensors, probes, developers and light-emitting-diodes. This review classifies fluorescent supramolecular polymers according to the emission colors, proposing the prospects towards future development of fluorescent supramolecular polymers.关键词：Supramolecular polymer;Fluorescence;Assembly
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发布时间：2023-10-12 - 摘要：All the important biomacromolecules in cells are formed by the polymerization of small molecular monomers. Polymerization within cellular microenvironment is very common and important in cell metabolism. Thus, transfer of polymerization reactions from laboratory flasks to cellular microenvironment is expected to be a powerful and versatile tool for regulation of cellular function. Owing to the diversity and tunability of polymers, in situ polymerization in cellular microenvironment may bring great possibilities for understanding, analysis and regulation of cellular function, which has great potential in the field of biomedicine. In this review, we summarize and classify in situ polymerization triggered by exogenous or endogenous stimuli (such as light, glutathione, reactive oxygen species, enzymes, etc.) in the cell microenvironment. The applications of in situ polymerization in the field of antitumor therapy, nerve repair and antimicrobe are briefly introduced. Finally, the key challenges of in situ polymerization in organisms are discussed, and its future development is proposed.关键词：In situ polymerization;Cellular microenvironment;Exogenous/endogenous stimuli;Biomedical applications
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发布时间：2023-10-12 - 摘要：With the widespread application of poly(ethylene terephthalate) (PET) in beverage bottles, textiles, film, and synthetic fibers, the environmental pollution caused by discarded PET products is becoming increasingly prominent. Chemical upcycling of waste PET to prepare high value-added materials is an important technology to solve the environmental pollution problem of waste PET and ensure sustainable development of resources. Based on the work of our research group in this field, this article introduces the research progress on the preparation of high-value porous carbon and metal-organic framework (MOF) material from waste PET in recent years, summarizes the preparation methods of different types of porous carbon and MOF, introduces the influencing factors and reaction mechanisms of PET degradation and carbonization reaction, and discusses the applications of the prepared porous carbon and MOF in interfacial solar-driven water evaporation and its integration with photocatalytic degradation of pollutants and thermoelectric power generation. Prospects are made for the future development direction.关键词：Poly(ethylene terephthalate);Carbon material;metal-organic framework material;Interfacial solardriven water evaporation
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发布时间：2023-10-12 - 摘要：Organic phase change materials have attracted tremendous attention and been employed into various occasions in merit of the isothermal process. For advanced applications of organic composite phase change materials (CPCMs), the main concern is the low thermal conductivity limiting the thermal conduction speed. In this regard, numerous kinds of functional nanoparticles have been introduced into to engineer high thermal conductivity of CPCMs. In this review, to provide guidelines to fabricate high-performance CPCMs, the heat conduction mechanism as well as the effect of thermal conductivity on the applications of CPCMs was discussed. Based on the mechanisms, the strategies relying on nanoparticles such as graphene, carbon nanotube, boron nitride etc. to reinforce the thermal conductivity of CPCMs were reviewed. Furthermore, the perspective of future challenges and directions on the development of CPCMs were presented. The review is intended to inspire the better fabrications and applications of highly thermally conductive CPCMs.关键词：Phase change materials;Latent heat;Thermal conductivity;Thermal energy storage;Nanoparticle
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发布时间：2023-10-12 - 摘要：Cellulose is a natural polymer with excellent mechanical properties, but its application is limited due to the very poor solubility and non-melting characteristics. Over the past 100 years, scientists have been continuously concentrating on the basic theories and processing methods of cellulose, and they have made significant progress in the construction of green cellulose dissolution systems and the analysis of dissolution mechanisms. However, there is still a lack of substantial breakthroughs on the thermoplastic processing of cellulose. The study of dynamic thermal analysis is an important method for investigating the glass transition and secondary transition behaviors of cellulose, and it is also an effective means to reveal the motion behavior of cellulose macromolecular chains at different scales. It can provide useful clues for achieving direct thermoplastic processing of cellulose. In this work, we briefly review the research advance in the glass transition behavior and thermal processing of natural cellulose, aiming to provide a more comprehensive perspective for in-depth understanding of the basic motion behavior of cellulose and to promote its large-scale application.关键词：Cellulose;Poor solubility and non-melting;Glass transition;Thermal processing
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发布时间：2023-10-12 - 摘要：Lithium is a crucial resource for the development of new energy industries in our country, which heavily relies on imports. The extraction of lithium from salt lakes presents an important solution to address the shortage of this valuable element. However, the high concentration of magnesium ions associated with salt lakes poses significant challenges to efficient lithium extraction. Nanofiltration membranes can effectively separate magnesium-lithium ions through pore size screening and charge repulsion synergies, thereby playing an increasingly vital role. Based on the regulation of membrane structure, including pore size, charge, and thickness, this article introduces various strategies for regulating membrane structure such as surface modification, nano doping, and new interfacial polymerization processes. The relationship between membrane structure and separation performance in Mg/L is also discussed. Additionally, the advantages and disadvantages of different methods for preparing membranes in the separation process of Mg/Li are summarized.关键词：Salt lake lithium extraction;Nanofiltration membrane;Interfacial polymerization;Surface modification;Electrolyte
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发布时间：2023-10-12 - 摘要：Unnatural biomacromolecule metamaterials are materials with unique chemical structure and functional properties, whose functions can surpass biomacromolecules in nature. It is a new research frontier in the field of polymer science. Such materials can be artificially engineered and modified through (dynamic) chemical modification, genetic engineering, and supramolecular self-assembly, resulting in exceptional optical, electronic, and mechanical properties, as well as excellent flexibility, responsiveness, controllability, and diversity. Therefore, unnatural biomacromolecular metamaterials have broad application prospects in the fields of biology, medicine and materials. Based on the above, this review narrates the design and synthesis methods of unnatural biomacromolecule metamaterials, and summarizes their applications in biosensing, catalysis, medicine, nanomaterials and other fields, emphasizing their importance in solving complex problems in different fields.关键词：Biomacromolecule;Protein;Nucleic acid;Biological functionalization;Metamaterial
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发布时间：2023-10-12 - 摘要：Adhesives are indispensable in modern life and production, and adhesives that are biodegradable, sustainable, and reversible adhesive have gained significant momentum. Herein, 2-urea-4[1H]-pyrimidinone terminated poly(carbonate ether) (UPPC) and functionalized ethyl cellulose (UEC) were synthesized via the coupling reaction between 2-urea-4[1H]-pyrimidinone isocyanate (UPy-NCO) and poly(carbonate ether) diol (Mn around 2000, carbonate unit content=28%, 33%, 45%, 51%, and 66%) or ethyl cellulose (Mn=11700). Through solution blending, supramolecular complexes composed of UPPC and UEC were successfully prepared, and the effects of the structure and content of UPPC on the adhesion properties of the supramolecular complexes were studied. When the content of UPPC33% is 70wt%, the supramolecular complex UPPC33%7/UEC3 displays a high adhesion strength of 7.4 MPa on steel, which is three times that of UPPC33%. In addition, UPPC33%7/UEC3 displayed reversible adhesive properties in response to heat, and its adhesion strength decreased by only 10% after repeated use for 6 consecutive times.关键词：Poly(propylene carbonate);Ethyl cellulose;Supramolecular;Adhesive;2-Urea-4[1H]-pyrimidinone
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发布时间：2023-10-12 - 摘要：Fluoranthene is a typical polycyclic aromatic hydrocarbon with highly planar structure. Its unique fivemembered ring core can endow fluoranthene with the electron-withdrawing character, making it quite suitable for constructing fused-ring imide type acceptor units. However, due to the limited functionalized sites, the fluoranthene-fused imides have not been successfully explored to construct the conjugated polymers. Herein, by taking advantage of an asymmetric 2,3-fluoranthene imide building block, two new donor-acceptor (D-A) type conjugated polymers have been successfully developed, i. e. random PF1 and regioregular PF2, and their photophysical properties and organic field-effect transistor (OFET) performance have been investigated in detail. The results demonstrated that the regioregular structure can afford the more ordered aggregation and better film morphology, which help to deliver a hole mobility of 1.72×10-5 cm2·V-1·s-1 in OFET devices based on PF2 instead of the failure in detecting device performance of random PF1. This work not only confirms the potential of 2,3-fluoranthene-fused imide as the acceptor unit in designing new D-A type polymeric semiconductors, but also further proves the important roles of regioregularity in the molecular aggregation and the optoelectronic performance.关键词：Conjugated polymers;Regioregularity;Fused-ring imide;Fluoranthene;Organic field-effect transistors
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发布时间：2023-10-12 - 摘要：To improve the poor activity of hydrophobic antibiotics in eradicating bacterial biofilms, a nano-antibiotic was constructed via the inclusion complexation between an azobenzene-conjugated norfloxacin prodrug and oligo-α-cyclodextrin. The enzyme-responsive degradation and biofilm eradication properties were characterized by nuclear magnetic resonance (NMR), dynamic light scattering (DLS), ultraviolet-visible spectrometer (UV-Vis spectrometer), and scanning electron microscope (SEM). The nano-antibiotics showed excellent broad-spectrum antibacterial activity against the planktonic Gram-negative bacteria Escherichia coli and Gram-positive bacteria Staphylococcus aureus, as well as effective deep penetration in bacterial biofilms due to the good water solubility. In the presence of overexpressed azoreductase in bacterial microenvironment, the azobenzene motif could be responsively degraded, leading the high efficiency in biofilm eradication of norfloxacin, which significantly reduced antibiotic dose. The enzyme responsive nanomedicine reported in this report provided a promising insight to combat the bacterial infection-related diseases.关键词：Bacterial biofilm eradication;Azoreductase responsive;Azobenzene;Nano-antibiotics;Responsive release
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发布时间：2023-10-12 - 摘要：Gel polymer electrolytes have attracted much attention as a kind of polymer electrolyte with high lithium ion conduction efficiency. However, the process of preparing gel polymer electrolytes still has some problems, such as difficult removal of catalyst and complicated process. In this work, the strategy of cationic polymerization of vinyl ether monomers induced by the potential Lewis acid in the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4) was used to explore a method of in situ construction of high performance gel polymer electrolytes inside the battery. The introduction of BMIMBF4 has improved the conductivity and electrochemical stability of gel polymer electrolytes. The lithium symmetrical battery based on the gel polymer electrolyte can cycle for 500 h at the current density of 0.1 mA·cm-2. The full battery in situ assembled by the gel polymer electrolyte is charged and discharged at a rate of 1 C, and the capacity retention is 90% after 100 cycles; Even at a high rate of 10 C, the discharge specific capacity of the battery can still be maintained at 67.5 mAh·g-1. The self-catalyzed strategy provides a new idea for the facile fabrication of gel polymer electrolytes.关键词：Lithium-ion batteries;Gel Polymer electrolyte;In situ polymerization;Self-catalyzed strategy
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发布时间：2023-10-12 - 摘要：Though polymerization dynamics is the key point during the teaching of polymer chemistry, the corresponding dynamic experiments for undergraduates hasn’t caught necessary attentions due to the limitation of teaching hours and experimental hardware conditions. In particular, the curing dynamic experiments of thermosetting resin are basically not involved in the undergraduate stage. In this article, using renewable vanillin and furfurylamine as the feedstocks, a bio-benzoxazine was prepared and its curing kinetics, activation energy, reaction mechanism and static curing technology were studied by differential scanning calorimetry (DSC). The results obtained by the domestic DSC equipment basically meet the requirements of the undergraduate experimental teaching, which creates enough chances for the promotion of the designed project described in this article.关键词：Experiment teaching;Kinetics of polymerization;Bio-benzoxazine;Thermosetting resin;Innovation ability
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发布时间：2023-10-12
Special Issue: Polymer Research at Huazhong University of Science and Technology
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