最新刊期
卷 38 ， 期 3 ， 2025
- 摘要：The application, acceptance, review, and funding situations of the 2024 National Natural Science Foundation of China projects in the organic polymer materials discipline of the department of engineering and materials sciences are summarized. The distribution of funding across various types of projects is analyzed, and relevant reforms in fund management are introduced. Additionally, the performance of projects concluded in 2023 is evaluated. Finally, recent significant research advancements in the field of organic polymer materials are reviewed, and the funding directions and work priorities for 2025 are projected.关键词：Organic polymer materials discipline;National Natural Science Foundation of China;Science foundation reform;Research advancements in organic polymer materials266|125|0更新时间：2025-02-27
- 摘要：Poly(ethylene oxide) (PEO), as a water-soluble polymer with thickening, sustained releasing, lubrication, dispersion, water retention and other properties, is widely used in fields such as food, medicine, chemical industry, energy battery. However, due to the low bond energy of the ether-oxygen bond on the PEO molecular chain, whose breakage is easily led by the exposure of external factors during processing and use, which in turn results in the reduction of the molecular weight of PEO, thus severely limiting the processing conditions, as well as the performance and service life of the final product of PEO. Based on the current performance requirements of PEO materials, this paper reviews the current research progress on PEO degradation behavior and degradation mechanism under thermal, irradiation, mechanical stress and ultrasonic conditions. In addition, measures to prevent degradation of PEO are summaried, and the related mechanisms of various prevention measures based on successful cases are discussed. Finally, the future development direction of related fields is prospected. This review aims to provide a useful reference for the production and processing of PEO.关键词：Poly(ethylene oxide);Process;Degradation86|80|0更新时间：2025-02-27
- 摘要：Drugs in traditional dosage forms have low bioavailability and it is difficult to achieve sustained release and targeted administration. Therefore, it is imperative to develop new dosage forms that meet the clinical needs of patients. Nanocarrier drug delivery systems have the characteristics of achieving targeted drug delivery, which has attracted considerable interest within the scientific community. Among them, the protein nanoparticle delivery system can significantly enhance the water solubility and stability of the drug, reduce the dosage of the drug to alleviate side effects, and be biodegradable in the body with minimal irritation. Among these, albumin nanoparticles, silk fibroin nanoparticles, and zein nanoparticles, three protein nanoparticles derived from different biological sources, are highly representative protein nanoparticle drug delivery systems. This review introduced the characteristics, preparation methods and application status of the aforementioned three protein nanoparticles, and discussed the challenges and possible solutions in the current research, providing a reference for further research and development of new drugs based on protein nanoparticles.关键词：Protein nanoparticles;Albumin;Silk fibroin;Zein;Drug delivery systems142|149|0更新时间：2025-02-27
- 摘要：Polypyrrole (PPy) is an inexpensive conductive polymer with efficient storage capacity, but its limited solubility restricts its production and application. Therefore, to expand its application scope, the design and research of multifunctional PPy composites have garnered significant attention. PPy/iron-based composites are prepared via methods such as the hydrothermal method, polymerization method, and one-pot method. The research on the application of PPy/iron composites primarily focuses on fields such as capacitors, electromagnetic wave absorbing materials, adsorbents, sensors, pharmaceuticals, and catalysts. In particular, they exhibit excellent performance in the electrode materials of supercapacitors, the absorption of electromagnetic waves, the adsorption of heavy metal ions, and catalytic degradation, showcasing broad application prospects. With the continuous development of preparation technology and further expansion of application fields, PPy/iron-based composites are expected to play a significant role in more areas.关键词：Polypyrrole;Preparation methods;Composites;Application area127|237|0更新时间：2025-02-27
- 摘要：Chelating resins, due to the presence of specific functional groups in their structure and their excellent chemical and physical stability, have been widely applied in the field of heavy metal ion adsorp-tion.This paper systematically reviews the recent research progress on chelating resins containing various functional groups as heavy metal cation adsorbents with a focus on analyzing the structural characteristics. Adsorption mechanisms and the advantages and disadvantages of commonly used chelating resins in terms of selectivity and regeneration performance are analyzed. Furthermore, the major research directions for the future development of chelating resins are proposed.关键词：Chelating resin;Heavy metal ion;Adsorption130|257|0更新时间：2025-02-27
- 摘要：RNA interference (RNAi) holds great potential in the treatment of cancer and various diseases. It is urgent to develop efficient and safe delivery carriers to achieve the clinical application of RNAi-based therapeutics. In this study, Flash nanoprecipitation (FNP) technology was utilized to prepare stable nanoparticles (NPs) based on CS and sodium tripolyphosphate (TPP). The effects of chitosan (CS) concentration, molecular weight, and the mass ratio of CS to TPP on the physicochemical properties of CS/TPP NPs were extensively investigated. Subsequently, suitable NPs were selected for in vitro siRNA delivery to HeLa cells. The results showed that stable complex NPs could be formed when the concentration of CS was 0.3-0.6 g/L and the mass ratio of CS to TPP was 1/1-4/1. Among them, stable CS NPs with a diameter of 70-100 nm were obtained at a CS concentration of 0.5 g/L and a CS/TPP mass ratio of 2/1. The selected CS/TPP NPs demonstrated a siRNA loading efficiency of 75%-90% with low cytotoxicity. siRNA-loaded CS NPs induced approximately 30% silencing of the target gene at a siRNA dose of 2.5 ng/μL, indicating a certain level of siRNA delivery efficiency. These results provide valuable insights for preparing stable and small CS NPs for siRNA delivery.关键词：SiRNA delivery;Flash nanoprecipitation;Chitosan;Nanoparticles96|118|0更新时间：2025-02-27
- 摘要：To investigate the adsorption characteristics of hydrophobically associating polymers and anionic surfactants on the sandstone surface, hydrophobically associating polymer (HAWP) and sodium dodecylbenzene sulfonate (SDS) were employed as the research objects to establish the HAWP/SDS system. Moreover, the molecular dynamics simulation was utilized to elucidate the competitive adsorption characteristics of the hydrophobically associating polymers and anionic surfactants on the sandstone surface. The simulation results indicated that during the adsorption of the HAWP/SDS system on the sandstone surface, SDS underwent chromatographic separation, and its diffusion coefficient was larger than that of HAWP. It was preferentially adsorbed on the surface of the sandstone, and the SDS content in the system diminished. The interactions between SDS and the polymer HAWP were weakened, which led to the extension of the polymer HAWP chain and altered the properties of the system. The adsorption of SDS on the sandstone surface was primarily affected by hydrogen bonding, and the absolute value of its adsorption energy on the sandstone surface exhibited a pattern of rapid increase, followed by a slight decrease, then an increase again, and finally tended to stabilize. The relative concentration distribution (RCD) results revealed that the anionic surfactant SDS can be adsorbed on the surface of the sandstone and form a monolayer of self-assembled film on the sandstone surface, which resulted in the water on the sandstone surface being driven away from the surface, thus changing the wetting property of the sandstone surface.关键词：Hydrophobically associating polymers;Anionic surfactants;Interactions;Adsorption properties;Molecular dynamics simulations51|49|0更新时间：2025-02-27
- 摘要：Succinic acid is a renewable chemical obtained through biological fermentation and can serve as a bio-material for epoxy resin preparation. The obtained epoxy vitrimer combines the properties of renewable, high-performance, and reprocessable together. In this study, we synthesized a bio-based epoxy vitrimer using succinic acid and utilized infrared spectroscopy and a rotary rheometer to investigate the gelation and curing process during the polymerization procedure from monomer to polymer, monitoring molecular structure translation and viscoelastic change. Furthermore, we studied the thermal stability, viscoelasticity, and mechanical properties of the vitrimers to provide a theoretical basis for the development and research of new epoxy resin vitrimer materials.关键词：Epoxy resin;Vitrimer;Succinic acid;Structure arrangement;Viscoelastic properties81|86|0更新时间：2025-02-27
- 摘要：Polyacrylate latex pressure-sensitive adhesives (PSAs) were prepared by using acrylic acid (AA), methyl methacrylate (MMA), butyl acrylate (BA), hydroxyethyl acrylate (HEA) and glycidyl methacrylate (GMA) as comonomers, and then highly tear-resistant polyacrylate latex pressure-sensitive adhesives (HPSAs) were further obtained by grafting dopamine (DOPA) with epoxy groups of PSAs. The effects of functional DOPA monomer dosage on the stability, viscosity, particle size and distribution, adhesion, and water resistance of HPSAs were investigated. It was the introduction of GMA and DOPA that effectively realized the unity of the adhesive force and cohesive force of HPSAs; when the amounts of GMA and DOPA were 3.0% and 0.4%, HPSA4 exhibited good stability, average particle size (185.4 nm) and distribution (PDI, 0.12), and best adhesive properties with initial adhesion (No. 12 ball), holding adhesion (>72 h), and 180° peeling strength (13.1 N). HPSAs are used as composite adhesives for composited polyethylene-based plastic protective films with low surface energy. The results showed that HPSA4 had an excellent composite effect and exhibited high tear resistance, and thus, might have broad application prospects.关键词：Protective films;Polyacrylate latex pressure-sensitive adhesives (PSAs);Emulsion polymerization;Adhesive performance;Composite performance56|102|0更新时间：2025-02-27
- 摘要：To understand the influence of rubber tree clones on the quality consistency of ribbed smoked sheet (RSS), two typical rubber tree clones, IAN873 and Reyan73397, whose inherent molecular weight distribution (MWD0) belonged to the unimodal MWD0 and bimodal MWD0, respectively, were selected in this study to prepare four RSS samples according to the same process in the latex stage. Analysis of the intrinsic structure and key non-rubber components of raw rubber showed that the weight average and number average relative molecular weight, gel content, Mooney viscosity, and initial plastic value of the RSS samples prepared using IAN873 were significantly higher than those prepared using Reyan73397. And the protein and lipid contents of IAN873 were also higher than those prepared using Reyan73397. Analysis of the properties of the vulcanizates revealed that IAN873 exhibited a higher effective crosslinking density, leading to increased stress at definite elongation and tensile strength, as well as reduced dynamic heat generation and permanent compression deformation. Overall, rubber tree clones have a significant influence on the structure and properties of RSS, which is the key factor affecting the quality consistency of RSS.关键词：Rubber tree clones;Ribbed smoked sheet;Intrinsic structure;Non-rubber components;Mechanical properties56|80|0更新时间：2025-02-27
- 摘要：In order to cultivate the ability of undergraduates majoring in polymer materials and engineering to solve practical scientific research problems by comprehensively utilizing their basic professional knowledge and experimental skills, and to enhance their understanding of cutting-edge scientific research, the Department of Polymer Science and Engineering of Zhejiang University has set up the course Polymer Materials Design and Practice, which integrates cutting-edge scientific research and education. The experimental projects of the course are transformed from the frontier scientific research achievements of the teachers, and the deep integration of science research and education has been achieved. The course reflects the characteristics of the discipline and the latest scientific research results, highlighting the innovation and comprehensiveness of the experimental projects. At the same time, we pay attention to the cultivation of scientific spirit, scientific research thinking and patriotism. This paper summarizes the background and objectives, teaching forms, main measures of the course, and the students’ feedback, and shares the teaching experience of the course.关键词：Integration of scientific research and education;Polymer Materials Design and Practice;Teaching reform;Comprehensive experiments63|48|0更新时间：2025-02-27
- 摘要：Comprehensively improving the independently cultivating capability of top-notch innovative talents is a key step to accelerate the realization of high-level technological self-reliance and self-improvement. Aiming at the cultivation of innovative talents, building a cultivation system that integrates scientific research and teaching is an important point of cultivating top-notch innovative talents. The polymer materials and engineering major of Beijing University of Chemical Technology, college of materials science and engineering, supported by advantageous disciplines of materials science and engineering and led by high-level teachers, has set up a series of professional cutting-edge courses including introduction, basic theory, scientific research and practical training for all students in the cultivation system. The major provides all students with innovative training channels to participate in practical scientific research projects, understands industry development trends, and experiences international cutting-edge innovation, and then comprehensively improves the innovative thinking and innovative capabilities for all students.关键词：Innovation capability;Integration of science and education;First-class major;Curriculum system;Polymer materials and engineering53|60|0更新时间：2025-02-27
- 摘要：Aiming at the lack of cultivating students' scientific research thinking in polymer chemistry experiment teaching, this study set the network structure regulation and properties of amine-cured epoxy resin-based shape memory polymers as a comprehensive experiment. Epoxy resin and polyether amine were used as raw materials to synthesize an epoxy resin-based shape memory polymer with a shape memory effect through body three-dimensional polycondensation. Crosslinking density, glass transition, storage modulus, loss factor and shape memory properties of materials were investigated using gel content, differential scanning calorimetry, dynamic thermomechanical analysis and creative experiments. Guide students to establish a scientific research thinking mode of “chemistry → structure → performance → function” for polymer materials, and connect important theories of polymer chemistry and physics in this progressive relationship, to provide training for scientific research thinking and innovation consciousness. Through the interesting macroscopic shape memory effect of “deformation → fixation → recovery”, students can perceive the microscopic glass transition and entropy elastic process, and their interest and innovative awareness in scientific research are fostered by interesting experimental phenomena and sensory stimulation.关键词：Epoxy resin;Shape memory polymer;Shape memory effect;Network structure71|133|0更新时间：2025-02-27
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