最新刊期
- 摘要：Aromatic Schiff base bonds, due to conjugated structure and reversible dynamic characteristics, play an important role in dynamic covalent chemistry. Unlike aliphatic Schiff base bonds, the introduction of aromatic or heteroaromatic skeletons not only endows Schiff base bonds with improved thermal and mechanical stability, but also allows the dynamic exchange barrier and stimulus-responsive behaviors to be tuned by electronic delocalization. This paper summarizes the effects of two representative structural motifs (e.g., aryl-alkyl and fully aryl substitution) on the stability and dynamic behavior of aromatic Schiff base bonds. Subsequently, it discusses the hydrolysis/condensation equilibrium and exchange mechanisms, and reveals the role of substituent electronic effects and acid catalysis in controlling dynamic exchange pathways. Recent progress in polymeric materials based on aromatic Schiff base are reviewed, focusing on applications in light-/heat-triggered self-healing, reprocessing and recycling, flame retardancy, antibacterial materials, and catalysis. This work provides a useful reference for the design and development of highly stable, smart, and multifunctional aromatic Schiff base polymers.关键词：Aromatic Schiff base bonds;Dynamic covalent polymers;Structural modulation;Dynamic mechanisms;Multifunctional polymeric materials27|20|0更新时间：2026-06-12
- 摘要：Integrating teachers’ research work with the principles of green chemistry, this study designs an improved comprehensive chemistry experiment titled “removal of reactive Orange 16 dye using glutaraldehyde-crosslinked modified chitosan/alumina adsorbent”. The experiment targets key challenges in the treatment of textile dyeing wastewater, particularly the difficulty of removing reactive Orange 16, as well as the limited adsorption capacity, poor stability, and weak regenerability of conventional adsorbent materials. In this work, alumina modification is employed to increase the specific surface area of the adsorbent, while glutaraldehyde crosslinking is used to construct a three-dimensional network structure, thereby enhancing the adsorption performance. The experimental design follows a complete workflow including material preparation, characterization analysis, performance optimization, regeneration and reuse, and adsorption mechanism investigation. It also incorporates response surface methodology (Box-Behnken design), kinetic and isotherm fitting, function construction, and other contents, enabling students to conduct experiments independently, establish environmental awareness, and cultivate a sense of responsibility for serving society through scientific research.关键词：Reactive Orange 16;Three-dimensional network;Response surface methodology;Environmental protection concept11|16|0更新时间：2026-06-12
- 摘要：The capability development challenges arising from the shortage of practical and virtual simulation teaching resources for the course “Polymer Synthesis Technology” in higher education institutions are addressed in this study. A tripartite collaborative teaching model framework centered on “teacher-led, student-centered, AI-empowered” was constructed. Meanwhile, a new teaching paradigm centered on artificial intelligence technology was established through curriculum restructuring, AI-empowered whole teaching processes, and mixed practices. Practical results demonstrate that the implementation of these reforms has significantly enhanced students’ classroom engagement, while markedly improving both teaching effectiveness and efficiency. This reform offers a replicable and scalable solution for conducting teaching activities and cultivating engineering practitioners and innovative talent under limited resource conditions.关键词：Polymer synthesis technology;AI-empowered;Mixed practice;Teaching reform16|18|0更新时间：2026-06-12
- 摘要：To develop a new leather finishing agent with excellent mechanical properties and multifunctional characteristics, addressing the core issues of traditional polymer coatings-such as single performance, easy aggregation of nanofillers and insufficient functional synergy, this study constructed a composite nanostructure (LDH@ZnO) of two-dimensional layered double metal hydroxides (LDH) and zero-dimensional zinc oxide (ZnO). Through mechanical blending, this structure was incorporated into a soap-free copolymer emulsion (H-P), resulting in the preparation of an LDH@ZnO/H-P nanocomposite finishing agent. This study demonstrated that the LDH@ZnO composite structure effectively promoted the dispersion and interfacial bonding of nanocomponents in the matrix. Compared to pure H-P films and films with single filler composites, the LDH@ZnO/H-P coated films exhibited significantly enhanced comprehensive performance: tensile strength increased to 9.98 MPa, wear resistance improved markedly (average friction coefficient reduced to 0.09); leveraging the synergy between LDH and ZnO, the finished leather samples demonstrated excellent flame retardancy (burning time of only 15 s); simultaneously, the composite coating exhibited superior thermal insulation (thermal conductivity of 0.05 W·m−1·K−1), UV shielding capability, and thermal stability. This work achieved synergistic improvement in multiple properties through a two-dimensional/zero-dimensional nanocomposite strategy, providing an effective approach for designing high-performance, multifunctional leather finishing materials.关键词：Layered double hydroxide;Nano ZnO;Nanocomposite;Leather finishing agent;Wear resistance15|13|0更新时间：2026-06-12
- 摘要：3D printing, as an emerging additive manufacturing technology, converts virtual models into physical objects layer by layer through computer-aided design (CAD). Owing to its advantages in high-precision fabrication, complex structural construction, and highly personalized customization, it has demonstrated broad application prospects across multiple fields. This review introduces the major 3D printing technologies, including vat photopolymerization (VPP), fused deposition modeling (FDM), powder bed fusion (PBF), binder jetting (BJ), material jetting (MJ), and laminated object manufacturing (LOM), and analyzes their applications in new energy and environmental protection, healthcare, aerospace, and building infrastructure. This review also discusses 4D printing as an extension of 3D printing, highlighting its programmable shape transformation and functional adaptability, with promising potential in fields such as flexible electronics and intelligent actuators. Although 3D printing still faces challenges related to material performance, standardization, and technology dissemination, continued technological advancement and deeper interdisciplinary integration are expected to enable it to play an even greater role in intelligent manufacturing and precision production, thereby driving the transformation and upgrading of the manufacturing industry.关键词：3D printing;Multiple applications;Smart manufacturing;Forming mechanism;4D printing33|10|0更新时间：2026-05-29
- 摘要：Regarding the issue of plasticizer migrating to the insulation layer during propellant storage, this report has selected layered graphene oxide (GO) as a nanofiller and systematically investigated its effectiveness and underlying mechanisms in enhancing the anti-plasticizer migration performance of the insulation layer. GO was prepared according to a modified Hummer’s method, and introduced into an ethylene propylene diene monomer (EPDM) matrix as a nanofiller. The GO/EPDM insulation layer was then fabricated via mechanical compounding. Among the samples, GO/EPDM-3 (with 3 phr GO) have exhibited the most significant inhibition effect on the migration of dioctyl sebacate (DOS), demonstrating an approximately 18.47% reduction in the equilibrium migration mass of DOS compared to unmodified EPDM. To further elucidate the regulatory mechanism of GO on plasticizer migration behavior, molecular dynamics (MD) simulations were integrated in this study to model the migration behavior of DOS within the thermal insulation layer. The simulation results revealed that, compared to unmodified EPDM, the migration coefficient and binding energy of DOS in the GO/EPDM system were significantly decreased, indicating that the introduction of GO effectively suppressed DOS migration. Both experimental and simulation results confirmed that the incorporation of GO can effectively enhance the anti-migration performance of the EPDM insulation layer.关键词：Graphene oxide;Thermal insulation layer;Ethylene propylene diene monomer;Plasticizer;Migration17|20|0更新时间：2026-05-19
- 摘要：Cycloaddition of carbon dioxide (CO2) and epoxides can boast 100% atomic economy, and it is considered an up-and-coming method for CO2 utilization. However, the need for harsh reaction conditions presents a significant challenge. This study addresses this issue by successfully preparing the cellulose-supported ionic liquid as a porous catalyst (PPCIL) via the reaction of allyl cellulose ether (AHP-cellulose) and vinyl imidazolium bromide ([VPIM]Br). The catalytic activity of PPCIL was thoroughly investigated. It was found that end epoxides with small-sized substituents such as epichlorohydrin, epibromohydrin, and propylene oxide, can be completely converted to corresponding carbonates over PPCIL at 80 °C and 0.1 MPa. When the temperature rose to 100 °C, PPCIL also revealed good catalytic activity towards end epoxides with larger size such as allyl glycidyl ether and styrene oxide. PPCIL can effectively activate the CO2 and epoxy substrates, and potential reaction mechanisms were proposed. Notably, PPCIL demonstrated high catalytic activity even after being recycled for five times, maintaining a yield of 88.5% and a selectivity of 98%. In summary, this study offers an effective strategy for heterogenizing ionic liquids for catalytic activation CO2 to cyclic carbonates under mild conditions.关键词：CO2;Ionic liquids;Cellulose modification;Porous catalyst352|14|0更新时间：2025-03-12
- 摘要：Polymer-based fibrous filtration materials are widely used, however, the development of high-temperature filtration application using engineering thermoplastics are limited by the difficulty of wet spinning and fiber refinement. In this paper, a nanofibrous membrane was prepared by electrospinning using the high performance engineering polymer polyetherketoneketone (PEKK), which can be dissolved in trifluoroacetic acid. And the regulation laws of the fiber diameter and morphology were investigated, as well as its characteristics for high temperature filtration application. The study shows that: the average diameter of the fiber can be refined to 87 nm, the pore size of the fiber membrane can be reduced to 293 nm, and the tensile strength can reach 7.77 MPa; the fiber membrane shows excellent filtration performance with the filtration efficiency of higher than 99.9% at a thickness of 6 μm; the fiber membrane maintains a good morphological structure, force, thermal properties, and high-temperature air filtration properties at 300 °C.关键词：Polyetherketoneketone;Electrospinning;Nanofiber;high temperature248|9|0更新时间：2025-03-12
- 摘要：Introducing cutting-edge science and technology into undergraduate experiment teaching has become one of the trends of education reform in colleges and universities. As a new manufacturing technology, photocuring 3D printing shows good application value in polymer material field. In terms of biomedical materials, 3D printing is used to design and prepare 3D repair materials that are identical or similar to the damaged tissue area of the patient to achieve precision and personalized medicine. Combined with the biomedical characteristics, the school has implemented a designing experiment teaching project themed on 3D printing polymer medical materials, which provided students with a platform of independent learning and practicing. In this study, the photosensitive materials methacrylamide-modified gelatin (GelMA) and polyethylene glycol diacrylate (PEGDA) were light-cured by digital light processing (DLP) 3D printing technology to prepare three-dimensional network hydrogel scaffolds. The printed samples had complete structure and interconnected channels, and their pore size was consistent with the 3D model. The effects of space structure and material formula on the properties of hydrogel scaffolds were analyzed. The results showed that the GelMA-PEGDA hydrogel with three-dimensional network and 500 μm pore size had good mechanical property, swelling behavior, and stability. This designing experiment involved an integration of multidisciplinary knowledge, which not only brought a novel teaching experience for teachers and students, but also provided a new idea for the training of innovative talents.关键词：3D printing;Polymer material;Photosensitive material;Hydrogel;Designing experiment590|44|0更新时间：2024-03-11
- 摘要：“Polymer surface(interface) adsorption” is an important component of the polymer surface and interface chapter in Polymer Physics teaching. It is related to the preparation of polymer composite materials, colloid stability, wastewater treatment, life systems, and many other fields involving the adsorption of macromolecules on the surface(interface), with important theoretical and practical significance. In order to improve undergraduate students' understanding of the phenomenon of polymer surface(interface) adsorption, this article proposes to start from the single molecule level and display the two-dimensional diffusion motion of polymer single chains on the surface(interface) observed in scientific research. By introducing vivid examples, the "adsorption-diffusion-desorption" dynamic model is explained to help students clarify the molecular mechanism of the "polymer surface(interface) adsorption" process. It is essential for students to apply correct thinking in polymer physics to solve practical problems related to polymers by compensating for the lack of dynamic thinking in the learning process, highlighting the philosophical thinking of the movement of all things, and cultivating correct worldviews and methodologies.关键词：Polymer surface(interface) adsorption;Dynamics;Single molecule tracking415|30|0更新时间：2024-03-11
- 摘要：Phase transition theory and phase diagrams are essential but challenging topics in polymer physics courses. This paper provides supplementary and extended derivations of phase equilibrium for polymer blends found in typical polymer physics textbooks and presents a novel method for analyzing phase equilibrium in multi-component complex systems. This approach helps students to deepen their understanding of the underlying logical relationships in phase transition theory, and to bridge the gap between theoretical knowledge in textbooks and practical research.关键词：Polymer blends;Phase equilibrium;Free energy;Chemical potential633|46|0更新时间：2024-03-11
- 摘要：The recycling process of waste polyester/cotton fabrics presents an enormous challenge due to a considerable quantity of waste, the intricate methodology and the minimal value of reused mixed products. The synergistic effect of citric acid and zinc chloride is utilized to effectively break cotton fibers while investigating the underlying mechanism of separation. By employing a concentration of 30% citric acid, 35% zinc chloride, a temperature of 90 ℃, and 3 hours, successful separation between polyester and cotton is achieved. The recovery rate of cellulose attains 84.1%, while retaining its crystalline structure characteristic of cellulose I. However, the degree of polymerization and crystallinity experience a decrease of 83.8% and 27.3%, respectively. Polyester fibers demonstrate a remarkable recovery rate of 97.8%, remaining largely undamaged throughout the separation process. The citric acid and zinc chloride acidolysis system can be recycled several times, enabling the separation and recovery of waste polyester/cotton blended fabrics.关键词：Waste polyester-cotton fabric;Separation;Cellulose;Citric Acid;zinc chloride660|50|0更新时间：2024-03-11
- 摘要：A eco-friendly epoxy emulsifier was synthesized from citraconic anhydride, itaconic anhydride, polyethylene glycol and epoxy resin without catalyst. The aqueous epoxy emulsion was prepared by phase inversion method. The structure and particle size distribution of the emulsifier and emulsion were characterized by 1H-NMR, IR, GPCand laser particle size analyzer. It was found that the emulsion have narrow particle size distribution and excellent stability. The waterborne epoxy coating was prepared with the aqueous epoxy emulsion. The performance and morphology of the coating were characterized using a thermogravimetric analyzer, scanning electron microscopy, and contact angle measurement instrument, and test the conventional performance and corrosiveness of the coating. The results show that the drying time of the waterborne epoxy coating is 20 minutes (surface dry) and 12 hours (solid dry), and the mechanical properties of the coating are excellent. The volatile organic compound (VOC) content is 22 g/L, and it exhibits excellent water resistance (1000 hours) and corrosion resistance (800 hours for neutral salt spray test).关键词：Emulsifier;Epoxy emulsion;Coating;Volatile organic compounds578|45|2更新时间：2024-03-11
- 摘要：The conformation of star comb-like polymer chains in dilute solutions were investigated using Brownian dynamics simulations. The results show that when the grafting density of the star comb-like chains is less than 0.2, the conformation is star-shaped. With the increase of the grafting density, the conformation gradually changes to spherical. In addition, the stretching factor can also better reflect the conformational transition from star to spherical shape. The length of the side chains less influences the stiffness of the star comb-like chain backbone, but its grafting density influences it more. As the length of side chains increases, the persistence length of side chains increases accordingly, but the relative rigidity strength decreases with the increase in side chain length. This paper reveals the relationship between conformation and molecular parameters of star comb-like polymers in dilute solutions, which helps to facilitate relevant characterization studies.关键词：Star comb-like polymers;Chain conformation;Brownian dynamics472|13|0更新时间：2024-03-11
- 摘要：Thin film capacitors are widely used in smart grid, wind power generation, electric vehicle, pulse power system and other fields because of their high power density, low loss, long cycle life, safety and environmental protection. The dielectric is the key to the performance of film capacitors, but the energy storage property of film capacitors is greatly reduced by the leakage current caused by the defects and impurities in the materials at high temperature and high electric field, it is difficult to obtain high energy density in thermally and electrically coupled fields. The introduction of trace organic molecule semiconductor into polymer dielectric can produce energy traps to trap carriers and suppress leakage current, thus reducing conductivity loss and improving charge-discharge efficiency. In this paper, the methods of improving the high temperature energy storage properties of dielectrics by introducing organic molecular semiconductors into polymer matrix are reviewed, the influence mechanism of organic small molecule semiconductor and polymer molecular semiconductor modification on energy storage properties is discussed, and the future development of related fields is prospected.关键词：有机小分子半导体;聚合物分子半导体;复合电介质;泄漏电流;高温储能587|43|0更新时间：2024-03-11
- 摘要：Nowadays, the rapid development of flexible wearable electronic devices, aerospace and other fields has increased the demand for flexible, lightweight electromagnetic interference (EMI) shielding materials, carbon nanotubes/polymer-based composites have attracted much attention because of their good flexibility, light weight, excellent electrical conductivity and mechanical stability, and adjustable EMI shielding efficiency. In this paper, the electromagnetic shielding mechanism is introduced, the dispersion method of carbon nanotubes and the preparation method of carbon nanotubes/polymer-based flexible EMI shielding composites are compared and summarized, and the research progress of carbon nanotubes/polymer-based flexible EMI shielding composites is reviewed. Finally, the key scientific problems to be solved urgently for carbon nanotubes/polymer-based flexible EMI shielding composites are proposed, and their future development trend is prospected.关键词：Carbon nanotubes;Dispersion method;Polymer-based;Electromagnetic interference shielding;Composites491|23|2更新时间：2024-03-11
- 摘要： Phosphorus-based flame retardant epoxy is an important packaging material for 5G communications, smart electronics and semiconductors due to its advantages of high flame retardant efficiency, low preparation cost and small environmental hazards. Based on the performance requirements of high efficiency phosphorus-based flame-retardant epoxy packaging materials, the types and flame-retardant mechanism of phosphorus-based flame-retardant epoxy were introduced, the application of phosphorus-based flame retardant epoxy in electronic packaging was reviewed, and the future development trend was prospected. It was pointed out that the preparation of intrinsic (reactive) phosphorus-based flame retardant epoxy was difficult and the content of available phosphorus was low, it was necessary to further optimize the process and increase the phosphorus content in the packaging system. In contrast, the filled phosphorus-based flame retardant epoxy was the most widely used in electronic packaging due to its simple preparation process, various flame retardants and high phosphorus content.关键词：Phosphorus-based flame retardant;Flame retardant efficiency;Epoxy;Electronic packaging;Flame retardant mechanism425|15|0更新时间：2024-03-11
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