Reactive & Functional Polymers最新文献_第9页

Development of photocurable hybrid polyurethane/acrylic resins with controlled molar mass for DLP 3D printing of scaffolds 可控制摩尔质量的光固化聚氨酯/丙烯酸复合树脂用于DLP 3D打印支架的研制

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2025-11-19 DOI: 10.1016/j.reactfunctpolym.2025.106570

Álvaro A. Cardona , Víctor H. Orozco , Andrés F. Vargas , Luis F. Giraldo

Vat photopolymerization, which includes stereolithography (SLA) and digital light processing (DLP), is a high-resolution additive manufacturing technique capable of fabricating scaffolds with complex geometries for biomedical applications. Such scaffolds must provide appropriate chemical, mechanical, and structural properties to support cell adhesion, proliferation, differentiation, and the transport of nutrients and metabolites. SLA and DLP require suitable polymeric materials that undergo UV photopolymerization. However, the limited availability of low-molecular-weight photocurable resins, together with the high rigidity, hydrophobicity, and poor biocompatibility of many commercial options, as well as difficulties in removing residual monomers, highlight the need for new resins with improved biocompatibility and enhanced cellular adhesion. In this study, given the established biocompatibility of polyurethanes, we synthesized hybrid poly(urethane/acrylate) resins. The results show that structural modifications to the prepolymer polyester polyols, poly(butylene adipate) (PBA) and poly(butylene adipate-co-maleate) (PBAM), synthesized with molecular weight control via kinetic evaluation, modulate the mechanical properties. Formulations based on PBAM yielded 3D printed parts with reduced stiffness and greater flexibility and elongation compared with commercial resins. Additionally, PBA based formulations exhibited lower apparent cytotoxicity in HaCaT human keratinocyte cell-viability assays. To further promote cell adhesion and response, beyond the contribution of carbamate polar groups, we selected polyester polyols rather than polyether polyols, as the soft segment. Additionally, the hybrid structures were end-capped with hydroxyethyl methacrylate (HEMA). Finally, DLP printing of formulations comprising the hybrid resins blended with commercial resins, using phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide (BAPO) as the photoinitiator, produced UV photocurable materials that yielded scaffolds supporting cell adhesion with moderate cytotoxicity.

还原光聚合，包括立体光刻（SLA）和数字光处理（DLP），是一种高分辨率的增材制造技术，能够制造具有复杂几何形状的生物医学应用支架。这种支架必须提供适当的化学、机械和结构特性，以支持细胞粘附、增殖、分化以及营养物质和代谢物的运输。SLA和DLP需要合适的聚合物材料进行紫外光聚合。然而，低分子量光固化树脂的有限可用性，加上许多商业选择的高刚性、疏水性和差的生物相容性，以及去除残留单体的困难，突出了对具有改善生物相容性和增强细胞粘附性的新树脂的需求。在本研究中，考虑到聚氨酯的生物相容性，我们合成了混合聚氨酯/丙烯酸酯树脂。结果表明，通过动力学评价控制分子量的方法合成的聚己二酸丁二烯（PBA）和聚己二酸丁二烯-共聚马来酸丁二烯（PBAM）对预聚聚酯多元醇进行结构改性，可以调节其力学性能。与商用树脂相比，基于PBAM的配方产生的3D打印部件刚度降低，柔韧性和伸长率更高。此外，基于PBA的配方在HaCaT人类角质细胞活力测定中表现出较低的明显细胞毒性。为了进一步促进细胞的粘附和反应，除了氨基甲酸酯极性基团的贡献外，我们选择聚酯多元醇而不是聚醚多元醇作为软段。此外，杂化结构被甲基丙烯酸羟乙酯（HEMA）端封。最后，使用苯基双（2,4,6-三甲基苯甲酰）氧化膦（BAPO）作为光引发剂，将混合树脂与商业树脂混合的配方进行DLP打印，生产出具有中等细胞毒性的支持细胞粘附的UV光固化材料。

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引用次数: 0

Closed-loop design of biomass epoxy resins from urolithin a: High-performance thermosets and their derived carbons materials for CO2 adsorption 尿石a生物质环氧树脂的闭环设计：用于CO2吸附的高性能热固性材料及其衍生碳材料

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2025-11-19 DOI: 10.1016/j.reactfunctpolym.2025.106568

Xuehua Zhang , Fengxiang Zuo , Yu Wang , Qirui Guo , Xin-Long Sha

The development of high-performance bio-based epoxy resins is of great importance for promoting material sustainability. However, challenges remain in the disposal and resourceful utilization of their waste, limiting their potential for sustainable industrial applications.To address these issues, this study utilizes urolithin A, a biomass-derived compound, as a raw material to synthesize a novel difunctional epoxy monomer. The synthesis is achieved through a straightforward and scalable process. When cured with 4,4′-diaminodiphenyl sulfone (DDS), the resulting thermoset, poly(UAEP)/DDS, exhibits good comprehensive properties. Compared with conventional bisphenol A-based epoxy resins, the poly(UAEP)/DDS resin demonstrates significantly enhanced thermal stability—with a glass transition temperature of 224 °C and an initial decomposition temperature of 364 °C—along with high mechanical strength (tensile strength of 88.3 ± 4.1 MPa) and a relatively low dielectric constant. These properties suggest broad application prospects in areas such as electronic encapsulation. Furthermore, due to its densely aromatic structure, poly(UAEP)/DDS shows favorable characteristics as a carbon precursor during pyrolysis. The carbon material (poly(UAEP)/DDS-800) obtained by carbonizing the resin possesses a high specific surface area and abundant microporous structure, leading to good CO₂ adsorption performance. Overall, this work establishes a strategy for sustainable design that links biomass-derived monomers to high-performance epoxy thermosets and ultimately to functional porous carbon materials. It offers a novel paradigm for green transformation throughout the entire life cycle of epoxy resins.

高性能生物基环氧树脂的开发对促进材料的可持续性具有重要意义。然而，在处置和合理利用其废物方面仍然存在挑战，限制了其可持续工业应用的潜力。为了解决这些问题，本研究利用一种生物质衍生化合物尿素A作为原料，合成了一种新型的双功能环氧单体。合成是通过一个简单和可扩展的过程实现的。用4,4′-二氨基二苯砜（DDS）固化后，得到的热固性聚合物(UAEP)/DDS具有良好的综合性能。与传统的双酚基环氧树脂相比，聚(UAEP)/DDS树脂的热稳定性显著增强，玻璃化转变温度为224℃，初始分解温度为364℃，同时具有较高的机械强度（抗拉强度为88.3±4.1 MPa）和相对较低的介电常数。这些特性在电子封装等领域具有广阔的应用前景。此外，由于其致密的芳香结构，聚(UAEP)/DDS在热解过程中表现出良好的碳前驱体特性。通过炭化树脂得到的碳材料（聚(UAEP)/DDS-800）具有较高的比表面积和丰富的微孔结构，具有良好的CO2吸附性能。总的来说，这项工作建立了一种可持续设计策略，将生物质衍生单体与高性能环氧热固性材料联系起来，最终与功能性多孔碳材料联系起来。它为环氧树脂整个生命周期的绿色转型提供了一个新的范例。

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引用次数: 0

Multifunctional Cu(I) oxide–decorated polypyrrole nanocomposite for ammonia sensing and efficient regioselective synthesis of 1,4-disubstituted 1,2,3-triazoles and 2- phenylquinazolin-4(3H)-ones 多功能Cu(I)氧化物修饰聚吡咯纳米复合材料的氨传感和高效区域选择性合成1,4-二取代1,2,3-三唑和2-苯基喹唑啉-4(3H)-

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2025-11-19 DOI: 10.1016/j.reactfunctpolym.2025.106562

Shrutipriya Devi, Priyanuj Krishnann Hazarika , Ramyata Priyam Borah , Arusmita Saikia, Dhruba Jyoti Sonowal, Rupkamal Chetia, Bikashjyoti Gohain, Diganta Sarma, Surajit Konwer

In this study, a multifunctional polypyrrole–Cu₂O (PPy–Cu₂O) nanocomposite was synthesized via an eco-friendly green route using Ocimum tenuiflorum leaf extract as a natural reducing agent. Structural analyses (XRD, FTIR, SEM, TEM, XPS) confirmed the formation of Cu₂O nanoparticles (20–50 nm) well-dispersed in the PPy matrix. The composite exhibited a narrowed optical band gap of 2.9 eV and enhanced electronic conductivity (48.1 S·cm⁻¹ at 353 K), significantly outperforming pristine PPy (0.042 S·cm⁻¹). It demonstrated excellent ammonia gas sensing performance at room temperature with a sensitivity of 52.9 % at 500 ppm, superior to pristine PPy, due to improved charge transfer at the PPy–Cu₂O interface. The PPy–Cu₂O sensor exhibited dynamic sensing behavior toward NH₃ concentrations of 100, 300, and 500 ppm, with corresponding response times of 85, 70, and 60 s, and recovery times of 100, 120, and 135 s, respectively. Moreover, it efficiently catalyzed the regioselective synthesis of 1,4-disubstituted-1,2,3-triazoles (98 % yield) and 2-phenylquinazolin-4(3H)-ones (95 % yield) in greener media under mild, ligand- and oxidant-free conditions. Also, the catalyst was successfully reproduced up to three cycles for both the reactions producing good yield without any loss in its activity. These results highlight the potential of PPy–Cu₂O as a versatile, green, and scalable nanomaterial for advanced applications in chemical sensing, sustainable catalysis, and environmental monitoring.

本研究以芦笋叶提取物为天然还原剂，通过绿色环保途径合成了多功能聚吡咯- cu2o （PPy-Cu2O）纳米复合材料。结构分析（XRD， FTIR， SEM， TEM， XPS）证实在PPy基体中形成了分散良好的Cu2O纳米颗粒（20-50 nm）。该复合材料的光学带隙缩小至2.9 eV，电子导电性增强（353 K时为48.1 S·cm−1），显著优于原始PPy （0.042 S·cm−1）。由于改善了PPy - cu2o界面的电荷转移，在室温下表现出优异的氨气传感性能，在500 ppm时灵敏度为52.9%，优于原始PPy。PPy-Cu₂O传感器对NH₃浓度为100、300和500 ppm时表现出动态传感行为，相应的响应时间分别为85、70和60 s，恢复时间分别为100、120和135 s。此外，在温和、无配体和无氧化剂的条件下，它有效地催化了1,4-二取代-1,2,3-三唑（98%产率）和2-苯基喹唑啉-4(3H)-酮（95%产率）的区域选择性合成。此外，该催化剂成功地重复了三次，两种反应都产生了良好的产率，而活性没有任何损失。这些结果突出了py - cu2o作为一种多功能、绿色和可扩展的纳米材料在化学传感、可持续催化和环境监测方面的先进应用的潜力。

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引用次数: 0

Comparative evaluation of polyurethane scaffolds synthesized from fully and partially hydrolyzed PVA for bone tissue engineering 聚乙烯醇全水解与部分水解合成骨组织工程用聚氨酯支架的比较研究

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2025-11-19 DOI: 10.1016/j.reactfunctpolym.2025.106569

Oriana Perna , Inés Alvarez Echazú , Lurdes López , Claudio Javier Perez , María Victoria Tuttolomondo , Gisela Alvarez

In this study, two polyurethane scaffolds were synthesized using fully hydrolyzed polyvinyl alcohol (PVA-FH) and partially hydrolyzed polyvinyl alcohol (PVA-PH) as precursors, with hexamethylene diisocyanate (HDI) as a crosslinking agent. The influence of the polymer's degree of hydrolysis on the physicochemical, thermal, morphological, and biological properties of the resulting materials was thoroughly evaluated. Fourier-transform infrared spectroscopy (FTIR) confirmed the formation of urethane linkages, with a higher crosslinking degree observed in PVA-FH-based scaffolds due to a greater availability of hydroxyl groups. However, thermogravimetric analysis revealed enhanced thermal stability in PVA-PH-PU scaffolds, associated with more effective microphase separation and restricted chain mobility. Swelling and degradation studies showed that PVA-FH-PU scaffolds absorbed more water and degraded faster, while PVA-PH-PU maintained better structural integrity over time and showed higher mineralization. Porosity measurements using both bulk density and mercury intrusion porosimetry indicated similar overall porosity, in the range of 30 to 40 %. Both materials were non-cytotoxic, as demonstrated by indirect contact assays, but showed limited initial cell colonization. Collagen coating significantly improved cell adhesion, especially for PVA-FH-PU scaffolds, making them promising candidates for bone tissue engineering applications.

本研究以全水解聚乙烯醇（PVA-FH）和部分水解聚乙烯醇（PVA-PH）为前驱体，以六亚甲基二异氰酸酯（HDI）为交联剂合成了两种聚氨酯支架。聚合物的水解程度对所得材料的物理化学、热、形态和生物性能的影响进行了全面的评估。傅里叶变换红外光谱（FTIR）证实了聚氨酯键的形成，由于羟基的可用性更高，在pva - fh基支架中观察到更高的交联度。然而，热重分析显示PVA-PH-PU支架的热稳定性增强，与更有效的微相分离和限制链迁移有关。溶胀和降解研究表明，PVA-FH-PU支架吸水更多，降解速度更快，而PVA-PH-PU随着时间的推移保持了更好的结构完整性，矿化程度更高。利用体积密度和压汞孔隙度法测量的孔隙度表明，总体孔隙度相似，在30 - 40%之间。间接接触试验表明，这两种材料均无细胞毒性，但初始细胞定植有限。胶原蛋白包被可显著改善细胞粘附性，特别是PVA-FH-PU支架，使其成为骨组织工程应用的有希望的候选材料。

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引用次数: 0

Biointerfacial characteristics between macrophage cells and biocompatible hydrogels: Cell colonization capacity of 3D scaffolds 巨噬细胞与生物相容性水凝胶之间的生物界面特性：3D支架的细胞定植能力

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2025-11-19 DOI: 10.1016/j.reactfunctpolym.2025.106560

Rocio Bonino , Virginia Capella , Nahir Panozzo Lacunza , Martin Broglia , Cesar Barbero , Pablo Bosch , Nancy Rodriguez , Ana C. Liaudat , Claudia R. Rivarola

Soft synthetic materials based on hydrogels with adequate biointerfacial properties to interact with living systems are being developed for biomedical applications. Macrophage cells exposed to synthetic materials play a fundamental role in indicating if an inflammation process is initiated. To propose new hydrogels such as cell scaffolds, the biointerfacial properties, biocompatibility and immune response of murine (RAW 264.7) and bovine (BoMac) macrophage cells exposed to hydrogels of different chemical composition are analysed. The hydrogels based on N-isopropylacrylamide (NIPAM) and copolymerized with cationic ((3-(acrylamidopropyl) trimethylammonium chloride, APTA), anionic (2-acrylamidopropane sulfonic acid, AMPS), and neutral (N-Tris((hydroxymethyl)methyl) acrylamide, THMA) comonomers are synthesized by cryopolymerization at −18 °C and room temperature (∼25 °C). Interfacial properties of hydrogels in culture medium regarded to water are valued by swelling capacity, volume phase transition temperature (VPTT), and contact angles. Only PNIPAM and PNIPAM-co-3 %APTA hydrogels are biocompatible against macrophage cells, showing a process of adaptation without causing cellular damage or significant immune response. Then, the in vitro cell migration assays are carried out with both macroporous hydrogels. Cell scraping (or wound) technique demonstrates that cells faster colonize the 3D hydrogels than the negative (without hydrogel) and positive (E. coli homogenate) control systems. Therefore, macroporosity and biointerfacial characteristics of these materials are adequate as scaffolds to induce the 3D tissue regenerative and promote wound healing as a new biomedical treatment.

基于水凝胶的软合成材料具有足够的生物界面特性，可以与生命系统相互作用，正在开发用于生物医学应用。巨噬细胞暴露于合成材料中，在指示炎症过程是否启动方面起着重要作用。为了提出新的细胞支架水凝胶，分析了不同化学成分的水凝胶对小鼠（RAW 264.7）和牛（BoMac）巨噬细胞的生物界面特性、生物相容性和免疫反应的影响。以n -异丙基丙烯酰胺（NIPAM）为基础，与阳离子(（3-（丙烯酰胺丙基）三甲基氯化铵（APTA））、阴离子（2-丙烯酰胺丙烷磺酸（AMPS））和中性（n -三（羟甲基）甲基丙烯酰胺（THMA））共聚物共聚，在- 18℃和室温（~ 25℃）下低温聚合合成了水凝胶。水凝胶在水培养基中的界面性质通过膨胀容量、体积相变温度（VPTT）和接触角来评价。只有PNIPAM和PNIPAM-co- 3% APTA水凝胶对巨噬细胞具有生物相容性，表现出一种适应过程，而不会引起细胞损伤或显著的免疫反应。然后，用这两种大孔水凝胶进行体外细胞迁移实验。细胞刮擦（或伤口）技术表明，细胞比阴性（无水凝胶）和阳性（大肠杆菌匀浆）对照系统更快地定植3D水凝胶。因此，这些材料的大孔隙度和生物界面特性足以作为诱导三维组织再生和促进伤口愈合的支架，成为一种新的生物医学治疗方法。

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引用次数: 0

High-elastic, anti-shrinkage poly(butylene adipate-co-terephthalate) foams prepared by ultraviolet-induced chain extension strategy 紫外诱导扩链法制备高弹性抗收缩聚己二酸丁二酯泡沫

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2025-11-19 DOI: 10.1016/j.reactfunctpolym.2025.106556

Fu-Lu Chang , Lun Chen , Zi-Yang Hua , Sheng Wang , Xiao-Chun Yin , Xian-Wu Cao , Guang-Jian He

Biodegradable polybutylene adipate-terephthalate (PBAT) foams have garnered significant attention as environmental and energy concerns escalate. However, PBAT foams produced via supercritical carbon dioxide (scCO₂) foaming often suffer from severe shrinkage, limiting their practical applications. Herein, we developed a novel strategy to address this issue by fabricating long chain branched PBAT through UV-induced reactive extrusion. Glycidyl methacrylate (GMA) and trimethylolpropane tri-acrylate (TMPTA) were introduced to induce branching via epoxy groups and carbon‑carbon double bonds during PBAT processing, respectively. The formation of long chain branched structures was confirmed through rheological analysis and Fourier transform infrared (FTIR) spectroscopy. The incorporation of branched structures significantly enhanced the melt strength and rheological properties of PBAT, thereby mitigating foam shrinkage. The modified PBAT foams exhibited an impressive expansion ratio of 10.4 without shrinkage, while maintaining a uniform cell structure with an average size below 40 μm under optimized conditions (15 MPa, 100 °C). Ultraviolet-induced chain extension strategy plays a pivotal role in enhancing CO₂ foamability and dimensional stability, offering a widely applicable anti-shrinkage strategies in biodegradable polymers.

随着环境和能源问题的升级，可生物降解的聚己二酸丁二酯（PBAT）泡沫已经引起了人们的极大关注。然而，通过超临界二氧化碳（scCO2）发泡生产的PBAT泡沫经常遭受严重的收缩，限制了其实际应用。在此，我们开发了一种新的策略来解决这一问题，即通过紫外线诱导反应挤出制备长链支链PBAT。甲基丙烯酸缩水甘油酯（GMA）和三甲基丙烷三丙烯酸酯（TMPTA）分别通过环氧基和碳碳双键诱导支化。通过流变学分析和傅里叶变换红外光谱（FTIR）证实了长链分支结构的形成。分支结构的加入显著提高了PBAT的熔体强度和流变性能，从而减轻了泡沫收缩。在优化条件（15 MPa, 100℃）下，改性PBAT泡沫的膨胀率为10.4，且无收缩，同时保持均匀的孔结构，平均尺寸小于40 μm。紫外线诱导的链延伸策略在提高CO₂的发泡性和尺寸稳定性方面起着关键作用，为生物可降解聚合物的抗收缩策略提供了广泛应用的方法。

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引用次数: 0

Pyridinium@cellulose as a green antimicrobial material with tailored dielectric behavior for bioelectronic interfaces Pyridinium@cellulose作为一种绿色抗菌材料，具有为生物电子界面量身定制的介电行为

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2025-11-17 DOI: 10.1016/j.reactfunctpolym.2025.106566

Ahmed Salama , Sherief A. Al Kiey , Ahmed K. Saleh

Water-soluble cationic cellulose derivative bearing a pyridinium tosylate functional group was synthesized via a homogeneous reaction. Tosylcellulose was prepared by reacting cellulose with p-toluenesulfonyl chloride. Pyridinium@cellulose was obtained through a direct reaction between tosylcellulose and pyridine. The resulting cationic cellulose derivative was characterized using various analytical techniques, including elemental analysis, ¹³C NMR, FT-IR spectroscopy, and thermogravimetric analysis (TGA). The dielectric and electrical analyses over the frequency range of 100 Hz –1 MHz and temperatures between 303 and 363 K revealed temperature-dependent relaxation phenomena governed by interfacial polarization and thermally activated ionic hopping. The imaginary modulus (M″) and AC conductivity spectra confirmed non-Debye-type relaxation behavior and correlated barrier hopping conduction. The presence of pyridinium ionic groups significantly enhanced charge carrier mobility and polarization strength, resulting in an improved dielectric response. Pyridinium@cellulose exhibited broad-spectrum antimicrobial activity, and the minimum inhibitory concentration (MIC) testing confirmed the potent activity of pyridinium@cellulose, revealing lower MIC values for S. aureus, S. mutans, and C. albicans (0.0012 mg/mL), compared to higher thresholds for E. coli (0.005 mg/mL) and S. typhimurium (0.0025 mg/mL). The combined electric properties, antimicrobial activity and cytotoxicity establishes the multifunctional nature of pyridinium@cellulose.

采用均相反应合成了含有甲磺酸吡啶官能团的水溶性阳离子纤维素衍生物。通过纤维素与对甲苯磺酰氯反应制备了甲苯磺酰纤维素。Pyridinium@cellulose是由甲苯基纤维素和吡啶直接反应得到的。所得到的阳离子纤维素衍生物使用各种分析技术进行了表征，包括元素分析、13C NMR、FT-IR光谱和热重分析（TGA）。在100 Hz -1 MHz频率和303 - 363 K温度范围内的介电和电学分析揭示了由界面极化和热激活离子跳变控制的温度依赖性弛豫现象。虚模量（M″）和交流电导率谱证实了非debye型弛豫行为和相关的势垒跳变传导。吡啶离子基团的存在显著提高了载流子迁移率和极化强度，从而改善了介电响应。Pyridinium@cellulose具有广谱抗菌活性，最低抑菌浓度（MIC）测试证实pyridinium@cellulose具有强效活性，显示金黄色葡萄球菌、变形葡萄球菌和白色念珠菌的MIC值较低（0.0012 mg/mL），而大肠杆菌（0.005 mg/mL）和鼠伤寒沙门氏菌（0.0025 mg/mL）的MIC值较高。综合电学性质，抗菌活性和细胞毒性建立了pyridinium@cellulose的多功能性质。

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引用次数: 0

Multifunctional NiFe₂O₄/chitosan–PEO nanocomposites for energy-storage and magneto-optical applications 多功能NiFe₂O₄/壳聚糖- peo纳米复合材料储能和磁光应用

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2025-11-17 DOI: 10.1016/j.reactfunctpolym.2025.106565

Ali A. Alhazime

This work presents the synthesis and characterization of chitosan/poly(ethylene oxide)/nickel ferrite (Cs/PEO/NiFe₂O₄) nanocomposite films tailored for energy-storage and magneto-optical applications. Nanocomposites were prepared via solution casting and characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Ultraviolet–Visible (UV–Vis) spectroscopy, impedance spectroscopy, and magnetometry. XRD scans confirmed single-phase spinel NiFe₂O₄ structure and a reduction in the semicrystallinity of Cs/PEO blend, while FTIR evidenced strong nanoparticle–polymer interactions. UV–Vis spectra reveal a red-shift and narrowed optical bandgap, indicating charge-transfer complex formation. Dielectric/impedance analyses show higher permittivity, enhanced ionic mobility, and decreased bulk resistance, following Jonscher's universal power law and the jump-relaxation model, evidencing interfacial polarization at polymer–nanoparticle boundaries. Magnetic study exhibits tunable ferri/superparamagnetic behavior, with optimal performance at 2.0 wt% NiFe₂O₄.

By integrating spinel NiFe₂O₄ into Cs/PEO, we concurrently tailor crystallinity, interfacial polarization, and charge-transport pathways, transforming Cs/PEO into a multifunctional nanocomposite with improved structural, optical, electrical, and magnetic characteristics suitable for next-generation optoelectronic, magnetic-sensing, and energy-storage devices.

本文介绍了用于储能和磁光应用的壳聚糖/聚环氧乙烷/镍铁氧体（Cs/PEO/NiFe₂O₄）纳米复合薄膜的合成和表征。采用溶液浇铸法制备了纳米复合材料，并用x射线衍射（XRD）、傅里叶变换红外（FTIR）光谱、紫外可见（UV-Vis）光谱、阻抗谱和磁强计对其进行了表征。XRD扫描证实了Cs/PEO共混物的单相尖晶石NiFe₂O₄结构和半结晶度的降低，而FTIR则证实了强的纳米颗粒-聚合物相互作用。紫外可见光谱显示出红移和狭窄的光学带隙，表明电荷转移复合物的形成。介质/阻抗分析显示，根据Jonscher的通用幂定律和跳变弛豫模型，聚合物-纳米颗粒边界的介电常数更高，离子迁移率增强，体电阻降低，证明了聚合物-纳米颗粒边界的界面极化。磁性研究显示出可调谐的铁/超顺磁性行为，在2.0 wt% NiFe₂O₄中具有最佳性能。通过将尖晶石NiFe₂O₄整合到Cs/PEO中，我们可以同时定制结晶度，界面极化和电荷传输途径，将Cs/PEO转化为具有改进结构，光学，电学和磁性的多功能纳米复合材料，适用于下一代光电，磁传感和储能器件。

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引用次数: 0

Selective Pb and Cu capture with advanced mesoporous Azyl@SA-CCS microspheres for targeted stabilization 选择性铅和铜捕获先进的介孔Azyl@SA-CCS微球的目标稳定

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2025-11-17 DOI: 10.1016/j.reactfunctpolym.2025.106563

Feili Li , Wanting Qiu , Tianzheng Ding , Jing Chen , Ge Yu , Qingjun Guo

Sludge land application is limited by heavy metal leaching, particularly Pb and Cu. Conventional stabilization techniques often lack the precision and efficiency needed for precise metal immobilization. This study developed a novel polysaccharide-based stabilizer, Azyl@SA-CCS, which demonstrated exceptional adsorption capacities of 333 mg g⁻¹ for Pb²⁺ and 69.0 mg g⁻¹ for Cu²⁺. The selectivity coefficients (K_d) for Pb²⁺ and Cu²⁺ were 20–65 times and 5.9–18.8 times higher than for competing ions (Zn²⁺, Cd²⁺, Ni²⁺), respectively. FTIR spectroscopy and DFT calculations revealed that abundant oxygen-containing functional groups generate negatively charged binding domains, enabling strong coordination with target ions. Structural reconstruction after ion re-adsorption further confirmed the material's intrinsic preference for Pb²⁺ and Cu²⁺. Pot experiments and leaching tests verified its high immobilization efficiency, while high-throughput sequencing confirmed minimal disturbance to soil microbial diversity, highlighting its environmental compatibility. This work establishes both a theoretical framework and a scalable technology for precise, eco-friendly heavy-metal stabilization in soils, suggesting a promising strategy for sustainable sludge management.

污泥的土地应用受到重金属浸出的限制，特别是铅和铜。传统的稳定技术往往缺乏精确金属固定所需的精度和效率。本研究开发了一种新型的多糖基稳定剂Azyl@SA-CCS，它对Pb2+的吸附量为333 mg g−1，对Cu2+的吸附量为69.0 mg g−1。Pb2+和Cu2+的选择性系数Kd分别是Zn2+、Cd2+、Ni2+的20 ~ 65倍和5.9 ~ 18.8倍。FTIR光谱和DFT计算表明，丰富的含氧官能团产生带负电荷的结合域，使其与目标离子具有很强的配位性。离子再吸附后的结构重构进一步证实了材料对Pb2+和Cu2+的固有偏好。盆栽试验和淋溶试验验证了其固定化效率高，高通量测序证实其对土壤微生物多样性干扰最小，突出了其环境相容性。这项工作为土壤中精确、生态友好的重金属稳定建立了一个理论框架和可扩展的技术，为可持续污泥管理提出了一个有前途的策略。

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引用次数: 0

Nitrogen-doped quantum dots synthesized from polyethylene terephthalate waste: Advancing barrier properties of polyvinyl alcohol for sustainable packaging 由聚对苯二甲酸乙二醇酯废料合成的氮掺杂量子点：推进聚乙烯醇在可持续包装中的阻隔性能

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2025-11-17 DOI: 10.1016/j.reactfunctpolym.2025.106564

Jamilur R. Ansari , Hyunjin Kim , Kitae Park , Kambiz Sadeghi , Jongchul Seo

Nitrogen-doped polymeric quantum dots (NPQDs) were synthesized through a one-step hydrothermal conversion of polyethylene terephthalate (PET) waste using ethylenediamine as a nitrogen source and subsequently incorporated into poly(vinyl alcohol) (PVA) matrices to fabricate nano-reinforced composite films. The effect of NPQD loading (0.1–0.7 wt%) on the structural, optical, and barrier properties of PVA was systematically examined. Transmission electron microscopy (TEM) revealed uniformly dispersed, quasi-spherical NPQDs with diameters ranging from 2 to 6 nm, while photoluminescence (PL) spectra exhibited pronounced quantum-confinement characteristics. X-ray diffraction (XRD) and differential scanning calorimetry (DSC) analyses indicated enhanced crystallinity of the PVA matrix, attributed to strong interfacial interactions and hydrogen bonding between the NPQDs and polymer chains. The incorporation of NPQDs led to remarkable improvements in material performance, with crystallinity increasing by 17.4 % and tensile strength enhancing by 89.1 % relative to neat PVA. Moreover, at 0.7 wt% NPQD loading, the oxygen transmission rate (OTR) decreased by 99.8 %, demonstrating exceptional gas-barrier capability. Simultaneously, the films exhibited significantly improved UV-shielding efficiency while maintaining high visible transparency (>99.7 %). These enhancements arise from the synergistic effects of nanoscale confinement, interfacial interactions, and induced polymer chain ordering. This research highlights a sustainable methodology for valorizing PET waste into high-performance nanomaterials, converting PET into high-performance nanofillers to produce optically transparent, UV-protective, and gas-impermeable PVA nanocomposite films suitable for next-generation eco-friendly packaging applications.

以聚对苯二甲酸乙二醇酯（PET）废料为原料，以乙二胺为氮源，通过一步水热转化法制备了氮掺杂聚合物量子点（NPQDs），并将其掺入聚乙烯醇（PVA）基体中制备纳米增强复合薄膜。系统地研究了NPQD负载（0.1-0.7 wt%）对PVA结构、光学和阻挡性能的影响。透射电子显微镜（TEM）显示出均匀分散的准球形NPQDs，直径在2 ~ 6 nm之间，而光致发光（PL）光谱显示出明显的量子限制特征。x射线衍射（XRD）和差示扫描量热法（DSC）分析表明，NPQDs与聚合物链之间的强界面相互作用和氢键增强了PVA基体的结晶度。与纯PVA相比，NPQDs的加入使材料的结晶度提高了17.4%，抗拉强度提高了89.1%。此外，当NPQD负载为0.7 wt%时，氧透过率（OTR）降低了99.8%，显示出卓越的阻气能力。同时，薄膜在保持较高的可见光透明度（> 99.7%）的同时，显著提高了紫外线屏蔽效率。这些增强来自于纳米级约束、界面相互作用和诱导聚合物链排序的协同效应。这项研究强调了一种可持续的方法，将PET废物转化为高性能纳米材料，将PET转化为高性能纳米填料，以生产适合下一代环保包装应用的光学透明、防紫外线和不透气的PVA纳米复合薄膜。

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引用次数: 0