Corrosion protection of high-strength aluminum alloys remains a critical challenge, especially for applications in marine and aerospace environments. This work reports BIPT-6, a new cerium-based metal-organic framework designed for sustainable corrosion protection of AA2024 aluminum alloy. BIPT-6 contains both Ce(III) and Ce(IV) ions and is constructed with 2,5-furandicarboxylate (FDA2- ), a biomass-derived ligand, through a simple one-pot solvothermal method. The structure and composition were verified by a series of advanced characterization methods. BIPT-6 crystallizes in a monoclinic system with space group P21/n. The protective ability of novel BIPT6 was evaluated by electrochemical impedance spectroscopy (EIS). It demonstrated good corrosion inhibition efficiency for the AA2024 aluminum alloy samples immersed in 0.05 mol/L NaCl solution containing 5 x 10-4 mol/L BIPT-6. Finally, BIPT-6 was applied as an additive to epoxy resin to prepare anti-corrosive coatings. The EIS results show that BIPT-6@Epoxy coating system provides a superior corrosion protection and stability to aluminum alloy AA2024 compared to blank coating. The corrosion inhibition mechanism of BIPT-6 was also investigated, highlighting its synergistic effect from dual corrosion inhibitors. This work showcased BIPT-6 as a promising approach for sustainable, smart corrosion protection strategies in aluminum alloys.

Spiropyran (SP) experiences isomerization from a colorless SP form to a colored merocyanine (MC) form and has received great attention due to its widespread use in optical printing materials and anti-counterfeiting. However, the isomerization mostly occurs in the solution state because of requiring free volume for the change in conformation of the SP molecule, which is hindered in the solid state. Here, we propose a molecular design strategy to link planar rigid carbazole (CZ) and naphthalene (NA) molecules with an SP molecule. Detailed photophysical property analysis and theoretical calculations suggest that the planar molecular conformation of the CZ and NA moieties contributes to a large free volume, promoting isomerization of SP under ultraviolet (UV) irradiation and mechanical grinding. The powder X-ray diffraction (XRD) pattern suggests that NA-SP has more loose intermolecular stacking than CZ-SP, leading to more efficient photo-isomerization. These results are beneficial to understand SP structures and the packing mode-to-stimuli responsive characteristic relationship. Consequently, by utilizing the efficient photochromic properties, we successfully demonstrate the application of CZ-SP and NA-SP as optical printing materials and anti-counterfeiting inks. Planar rigid carbazole and naphthalene-based spiropyran derivatives with efficient photochromism for optical printing materials.

An efficient and simple in-situ/mechanical two-step strategy has been discovered for the fabrication of nanocontainers based on zeolite imidazole framework-8 (ZIF-8) with corrosion inhibitors (benzotriazole, BTA). The nanocontainers were applied in anticorrosive coatings with anticorrosion and antibacterial bifunctions for aluminum alloys AA2024. The effects of ZIF-8 modified with the corrosion inhibitor via different methods (in-situ, mechanical, and two-step strategies) on its morphology, composition, structure, loading/release behavior were studied and discussed. Results showed that the amount of loaded BTA was positively correlated with the crystal size of the final ZIF-8, impacting sustained release. Compared with the conventional primary load (in-situ and mechanical loading way), the two-step loading method (in-situ followed by mechanical treatment) achieved a higher BTA loading without evident ZIF-8 morphology and structure changes. The two-step modified (2-BTA@ZIF-8) powders exhibited good corrosion inhibition and remarkable antibacterial properties against Escherichia coli and Staphylococcus aureus. Additionally, the 1-BTA@ZIF-8 (in-situ strategy), 1-BTA/ZIF-8 (mechanical strategy) and 2-BTA@ZIF-8 composites were dispersed in acrylic resin to prepare anticorrosive and antibacterial bifunctional coatings. Results showed that the 2-BTA@ZIF-8 incorporated acrylic coatings exhibited superior anticorrosion performance and antimicrobial activity compared to the unmodified coating due to the controlled release of BTA. Thus, elaborated strategy represents a feasible and effective way to construct high-performance anticorrosive and antimicrobial coatings with metal-organic framework materials.

Dye-sensitized solar cells (DSSC) are one of the ways to effectively utilize solar energy because of their characteristics of simple preparation process and low cost. The composition, structure and working principle of dyesensitized solar cells are briefly introduced. The TiO2 photoanode material, as an important part of dye-sensitized solar cells, is introduced in detail. The current research results of TiO2 electrode are summarized, and the influence of TiO2 photoanode material modification on DSSC performance is analyzed. At the same time, the future development direction of TiO2 photoanode is prospected.

Intrinsic self-healing polymers via dynamic covalent bonds have been attracting extensive attention because of their repeatable self-healing property. Herein, a novel self-healing epoxy resin was synthesized with disulfide-containing curing agent via the condensation of dimethyl 3,3′-dithiodipropionate (DTPA) and polyether amine (PEA). Therefore, in the structure of cured resin, flexible molecular chains and disulfide bonds were imported into the cross-linked polymer networks for triggering self-healing performance. The self-healing reaction of cracked samples was realized under a mild condition (60 °C for 6 h). The distribution of flexible polymer segments, disulfide bonds and hydrogen bonds in cross-linked networks plays a great role in the self-healing process of prepared resins. The molar ratio of PEA and DTPA strongly affects the mechanical performance and self-healing property. Especially when that molar ratio of PEA to DTPA is 2, the cured self-healing resin sample showed great ultimate elongation (795%) and excellent healing efficiency (98%). The products can be used as an organic coating, in which the crack could self-repair during a limited time. The corrosion resistance of a typical cure coating sample has been testified by an immersion experiment and electrochemistry impedance spectrum (EIS). This work provided a simple and low-cost route to prepare a self-healing coating for prolonging the service life of conventional epoxy coatings.

高分子化学是高分子材料与工程专业的专业核心课之一,将高分子化学实验课与理论课协同进行,互动融合,要求学生能够根据实验方案安全地实施实验,采集实验数据,并从实验现象和实验结果中进一步理解聚合反应理论.以学生为中心的高分子化学实验教学模式,学生作为实验课的主体,教师作为课程的设计者和指导者,为实验课程设计相关考核步骤并提供有效学习资料和学习指导.该探索中通过虚拟仿真实验练习等预习环节和课前考核,规范实验操作,提高了实验课效率,达成了实验课的课程目标,提高了学生在实验课中建构知识、思考问题、分析问题的能力.

面对新工科教育背景下提升创新型人才综合素养的迫切要求,理工科专业课引进课程思政教学势在必行.文章以聚合物制备工程课程为例,详细阐述专业课引进课程思政的必要性生,并结合新工科教育的基本内涵,讨论了该课程可利用的课程思政融入点以及教学改革思路.

"聚合物制备工程"在本专业毕业要求中承担了重要的支撑作用.本文根据"新三中心"理论,在课程教学设计方面进行了较为细致的探索,提出根据国家战略需求和社会需要确定教学目标,妥善选取并更新教学内容,综合运用案例教学法、启发式教学法和任务驱动教学法促进学生的自主学习,并合理设置平时教学的过程考核.课程教学改革的落脚点在于建立并强化学生对本课程的学习动机,加强学习效果,实现知识与能力、素养的统一,为毕业生的职业发展提供精神动力和智力支持.

Nitrile-butadiene rubber (NBR) composites filled with functionalized BN platelets were successfully prepared to yield materials with high thermal conductivities and dielectric constants. To enhance the interfacial interactions between BN platelets and NBR matrix, non-covalent functionalization of poly(dopamine) (PDA) followed by covalent functionalization of γ-(2,3-epoxypropoxy)propytrimethoxysilane (KH560) were employed for BN platelets surface modification to yield BN-PDA-KH560. This route led to good filler dispersion of BN-PDA-KH560 plateltes with decreased interfacial thermal resistances. Large thermal conductivity (0.409 W/mK) was achieved with 30 vol% BN-PDA-KH560/NBR composite. This value was 2.6 folds higher than that of pure NBR (0.157 W/mK). The 30 vol% BN-PDA-KH560/NBR composite not only exhibited relatively high dielectric constant (9 at 100 Hz) but also remained low dielectric loss tangent (0.12 at 100 Hz). Overall, these findings provide a simple and effective route for preparing high-performance NBR composites with large thermal conductivities and dielectric constants for potential application in electronic devices.

Owing to the development of modern micro-electronic devices, polymer composites with high thermal conductivity and low dielectric constant have become increasingly important. Herein, a combination of covalent and non-covalent modification was used to functionalize boron nitride (BN) platelets via first deposition with poly (dopamine) (PDA) followed by grafting with y-methacryloxypropyl trimethoxy silane (KH570) (denoted as BN-PDA-KH570). The as-prepared BN-PDA-KH570 platelets were incorporated into the natural rubber (NR) matrix to prepare thermal conductive composites. After modification with PDA-KH570, the BN platelets were uniformly dispersed into the NR matrix, which is beneficial for improving the thermal conductivity of NR. The interfacial thermal resistance of the composites was also reduced due to the stronger interfacial interaction via vulcanization of NR with double bonds in KH570. Thus, the NR composites filled with 30 vol% BN-PDA-KH570 platelets exhibited a relatively high thermal conductivity of 0.39 W/mK, which is about 1.5 times and 4 times of 30 vol% BN/NR composite (0.26 W/mK) and pure NR (0.10 W/mK), respectively. In addition, the BN-PDA-KH570/NR composites exhibited a low dielectric constant (3.51 at 100 Hz) and a low dielectric loss tangent (0.25 at 100 Hz), which holds promising applications as thermal management materials for electronic devices.