Reactive & Functional Polymers最新文献_第8页

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 : 2026-02-01 Epub 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

In situ polymerization with Carboxylated Polysulfone for enhanced mechanical, thermal, and dimensional stability of PA6 用羧基化聚砜原位聚合提高PA6的机械、热和尺寸稳定性

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2026-02-01 Epub Date: 2025-12-11 DOI: 10.1016/j.reactfunctpolym.2025.106606

Tihe Zheng, Wenxing Yuan, Rende Qin, Qin Gui, Hailiang Zhang

Polyamide 6 (PA6) is widely used in the automotive, electrical, and textile industries due to its high strength, excellent wear resistance, and processability. However, its high moisture absorption, poor dimensional stability, and low heat distortion temperature (HDT) greatly limit its applications under humid or high-temperature environments. To overcome these inherent drawbacks, we propose an in situ polymerization and blending modification strategy to construct PSU/PA6 composites with simultaneously enhanced mechanical, thermal, and moisture-resistant properties. In this strategy, polysulfone (PSU) and carboxyl-functionalized polysulfone (CPSU) are synthesized and incorporated into the hydrolytic ring-opening polymerization of ε-caprolactam to prepare PSU/PA6 composite and CPSU-g-PA6/PA6 grafted composite. Compared with pure PA6, both PSU/PA6 and CPSU-g-PA6/PA6 exhibit significantly reduced water absorption and markedly improved HDT and mechanical properties. Moreover, CPSU-g-PA6/PA6 outperforms PSU/PA6 blends in moisture resistance and mechanical properties, and does not exhibit the pronounced phase separation commonly observed in the latter. Specifically, the 96 h water absorption decreases from 3.01 % for PA6 to 2.40 % for G-8. The HDT increased from 56.3 °C to 75.2 °C. The tensile strength and flexural strength increased from 64.5 MPa and 83.6 MPa to 79.7 MPa and 106.4 MPa, respectively.

聚酰胺6 （PA6）由于其高强度，优异的耐磨性和可加工性而广泛应用于汽车，电气和纺织工业。然而，它的吸湿性高，尺寸稳定性差，热变形温度（HDT）低，极大地限制了它在潮湿或高温环境下的应用。为了克服这些固有的缺点，我们提出了一种原位聚合和共混改性策略来构建PSU/PA6复合材料，同时具有增强的机械，热和防潮性能。在该策略中，合成了聚砜（PSU）和羧基功能化聚砜（CPSU），并将其加入到ε-己内酰胺的水解开环聚合中，制备了PSU/PA6复合材料和CPSU-g-PA6/PA6接枝复合材料。与纯PA6相比，PSU/PA6和CPSU-g-PA6/PA6均能显著降低吸水性，显著提高HDT和力学性能。此外，CPSU-g-PA6/PA6在抗湿性和机械性能方面优于PSU/PA6共混物，并且没有后者常见的明显相分离现象。96 h吸水率由PA6的3.01%下降到G-8的2.40%。HDT由56.3℃升高到75.2℃。抗拉强度和抗折强度分别由64.5 MPa和83.6 MPa提高到79.7 MPa和106.4 MPa。

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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 : 2026-02-01 Epub 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

Poly(aniline-co-pyrrole)/SnO2 nanocomposites: Innovative electrode materials for enhanced capacitance for symmetric supercapacitor applications 聚（苯胺-共吡咯）/SnO2纳米复合材料：用于增强对称超级电容器应用电容的创新电极材料

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2026-02-01 Epub Date: 2025-11-22 DOI: 10.1016/j.reactfunctpolym.2025.106573

Manikant , Srikanta Moharana , Alekha Kumar Sutar , Tungabidya Maharana

Polypyrrole (PPy) and polyaniline (PANI) are two of the most significantly used conducting polymers in supercapacitor applications. The chemical oxidative polymerization in-situ method is applied to synthesize the poly(aniline-co-pyrrole)/SnO₂ (PAPSn) nanocomposites. Three different batches of the PAPSn nanocomposites (NCs) were produced by combining the PPy and PANI with different amounts of SnO₂. The electrochemical properties of the synthesized PAPSn NC materials were thoroughly evaluated using a potentiostat in 1 M H₂SO₄ solution. The PAPSn10 electrode exhibited improved electrochemical performance and achieved a remarkable specific capacitance (C_sp) of 670 F g⁻¹ at 1 A g⁻¹. The PAPSn10 symmetric supercapacitor (SSC) device exhibited a C_sp of 252 F g⁻¹ at 1 A g⁻¹. It achieved a remarkable power and energy densities of 696 W kg⁻¹ and 35 Wh kg⁻¹, respectively. The SSC device retained 85 % of its initial capacitance even after 3000 charge-discharge cycles at a current density of 4 A g⁻¹. This signifies the exceptional cycling stability of the PAPSn10 SSC device. These findings emphasized the potential of PAPSn10 NCs as a promising candidate in energy storage applications.

聚吡咯（PPy）和聚苯胺（PANI）是超级电容器中应用最广泛的两种导电聚合物。采用原位化学氧化聚合法制备了聚苯胺-共吡咯/SnO2 （PAPSn）纳米复合材料。将聚吡啶和聚苯胺与不同数量的SnO2相结合，制备了3批不同批次的PAPSn纳米复合材料。利用恒电位器在1 M H2SO4溶液中对合成的PAPSn NC材料的电化学性能进行了全面评价。PAPSn10电极的电化学性能得到了改善，在1ag−1下的比电容（Csp）达到670 F g−1。该PAPSn10对称超级电容器（SSC）器件在1ag−1时的Csp值为252fg−1。它的功率和能量密度分别为696 W kg - 1和35 Wh kg - 1。在4 a g−1的电流密度下，即使在3000次充放电循环后，SSC器件仍保持了85%的初始电容。这表明PAPSn10 SSC器件具有出色的循环稳定性。这些发现强调了PAPSn10纳米碳纳米管在储能应用中的潜力。

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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 : 2026-02-01 Epub 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

Sebacic acid as a renewable monomer for biodegradable polyesters: A review 癸二酸作为生物可降解聚酯再生单体的研究进展

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2026-02-01 Epub Date: 2025-11-23 DOI: 10.1016/j.reactfunctpolym.2025.106577

Hyunho Jang , Gunhee Park , Sangwoo Kwon , Su-il Park

Sebacic acid, a 10‑carbon aliphatic dicarboxylic acid, can be produced on an industrial scale (∼150,000 tons per year) from biomass-derived oils such as castor oil. Environmental concerns have heightened the need for renewable resources in the chemical industry, prompting the widespread use of sebacic acid in the chemical, pharmaceutical, and cosmetic industries. Notably, sebacic acid can also be used as a building block in biodegradable polyesters, considering its long octamethylene segment imparts excellent flexibility and degradability, while its nontoxicity broadens its application scope. Consequently, sebacic acid is increasingly used in developing renewable and biodegradable polyesters with accelerated degradation performance. This review discusses recent advancements in sebacic-acid-based polyesters, focusing on their synthesis and characterization, and outlines future research perspectives in the field.

癸二酸是一种10碳脂族二羧酸，可从蓖麻油等生物质衍生油中以工业规模（每年约15万吨）生产。环境问题提高了化学工业对可再生资源的需求，促使己二酸在化学、制药和化妆品工业中广泛使用。值得注意的是，己二酸也可以作为生物降解聚酯的组成部分，因为它的长八亚甲基段赋予了它良好的柔韧性和可降解性，而它的无毒性扩大了它的应用范围。因此，己二酸越来越多地用于开发具有加速降解性能的可再生和可生物降解聚酯。本文综述了近年来癸二酸基聚酯的研究进展，重点介绍了癸二酸基聚酯的合成和表征，并展望了该领域未来的研究方向。

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 : 2026-02-01 Epub 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

The hydrazone-linked and imine-linked Tp covalent organic frameworks for fluorescence sensing iodide ions and nitrophenols 用于荧光感应碘离子和硝基酚的腙连接和亚胺连接的Tp共价有机框架

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2026-02-01 Epub Date: 2025-11-22 DOI: 10.1016/j.reactfunctpolym.2025.106572

Qi Peng

One of the emerging problems in fluorescence sensing is the development of high-performance sensors with high abundant active sites to achieve rapid and strong interaction with analytes such as iodide ions, 2,4-dinitrophenol, and 2,4,6-trinitrophenol. In this work, we prepared hydrazone-linked COF (TpTHTA) and one imine-linked COF (TpMA) through the condensation of 2,4,6- tris(hydrazino)-1,3,5-triazine and melamine with 2,4,6-tris(p-formylphenoxy)- 1,3,5-triazine. Although the specific surface area and pore volume of TpTHTA (2148 m² g⁻¹ and 1.0997 cm³ g⁻¹) are lower than those of TpMA (2403 m² g⁻¹ and 1.3325 cm³ g⁻¹), the fluorescence sensing sensitivities of TpTHTA to I⁻ and DNP (K_SV: 1.76 × 10⁴ and 2.14 × 10⁴ L⁻¹ mol) are higher than that of TpMA (K_SV: 1.61 × 10⁴ and 6.78 × 10³ L⁻¹ mol), which is because the active sites of TpTHTA are more than that of TpMA. The mechanisms of iodine ion quenching fluorescence of TpTHTA and TpMA are heavy atom effect and energy transfer mechanism, while the mechanisms of DNP and TNP quenching fluorescence of TpTHTA and TpMA are electron transfer mechanism, energy transfer mechanism and basic hydrogen bond interaction. TpTHTA and TpMA can detect iodide ions in wheat flour and DNP and TNP in river sand with satisfactory recovery and low relative standard deviation. Moreover, TpTHTA and TpMA were characterized by XRD, TEM, BET, FE-SEM, TGA, FT-IR, and solid state ¹³C NMR.

荧光传感的新问题之一是开发具有高活性位点的高性能传感器，以实现与碘离子、2,4-二硝基苯酚和2,4,6-三硝基苯酚等分析物的快速强相互作用。本研究通过2,4,6-三（对甲氧基苯氧基）-1,3,5-三嗪与2,4,6-三（对甲氧基苯氧基）-1,3,5-三嗪的缩合反应，制备了腙连接COF （TpTHTA）和一亚胺连接COF （TpMA）。虽然TpTHTA的比表面积（2148 m2 g−1）和孔体积（1.0997 cm3 g−1）低于TpMA (2403 m2 g−1和1.3325 cm3 g−1)，但TpTHTA对I−和DNP （KSV: 1.76 × 104和2.14 × 104 L−1 mol）的荧光传感灵敏度高于TpMA (KSV: 1.61 × 104和6.78 × 103 L−1 mol)，这是因为TpTHTA的活性位点比TpMA多。TpTHTA和TpMA的碘离子猝灭荧光机制为重原子效应和能量转移机制，TpTHTA和TpMA的DNP和TNP猝灭荧光机制为电子转移机制、能量转移机制和碱性氢键相互作用机制。TpTHTA和TpMA可以检测小麦粉中的碘离子和河沙中的DNP和TNP，回收率满意，相对标准偏差低。采用XRD、TEM、BET、FE-SEM、TGA、FT-IR和固态13C NMR对TpTHTA和TpMA进行了表征。

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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 : 2026-02-01 Epub 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

Thiourea-based hybrid sPEEK membranes using a Sol-Gel approach: Elaboration of stabilized hybrid sPEEK membranes 采用溶胶-凝胶方法的硫脲基混合sPEEK膜：稳定混合sPEEK膜的细化

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2026-02-01 Epub Date: 2025-11-30 DOI: 10.1016/j.reactfunctpolym.2025.106588

E. Ferri , C. Tougne , M. Daoudi , F. Gouanvé , O. Gain , L. Gonon , V.H. Mareau , H. Mendil-Jakani , A. El Kaddouri , J.C. Perrin , J. Dillet , O. Lottin , C.C. Santini , E. Espuche , V. Dufaud

Chemically stabilized hybrid membranes derived from sulfonated Poly (Ether Ether Ketone) membrane (sPEEK) have been developed for fuel cell applications. The synthesis is based on Sol Gel (SG) chemistry involving the in situ growth of a reactive SG phase containing antioxidant thiourea functions, namely N,N′-bis[3-(triethoxysilyl)propyl]thiourea (HTU) and N-phenyl,N′[3-(triethoxysilyl)propyl] thiourea (TTU) for SG uptake up to 20 wt%. Well-nanostructured sPEEK membranes with intact thiourea functional groups and a SG phase highly condensed (up to 85 %) and homogeneously dispersed are obtained. Despite the incorporation of the reactive silicate phase, the functional properties of the membrane electrolyte - namely thermal stability, water uptake, gas permeability, and ionic conductivity - are retained. Accelerated ageing tests in H₂O₂ solution demonstrate the ability of the sol-gel (SG) phase to mitigate oxidative degradation, thereby significantly enhancing membrane durability.

由磺化聚醚醚酮膜（sPEEK）衍生的化学稳定杂化膜已被开发用于燃料电池。该合成基于溶胶-凝胶（SG）化学，涉及含有抗氧化硫脲功能的反应性SG相的原位生长，即N，N ' -双[3-（三乙基氧基硅基）丙基]硫脲（HTU）和N-苯基，N '[3-（三乙基氧基）丙基]硫脲（TTU）， SG吸收率高达20%。获得了具有完整硫脲官能团和SG相高度凝聚（高达85%）和均匀分散的纳米结构良好的sPEEK膜。尽管加入了活性硅酸盐相，膜电解质的功能特性——即热稳定性、吸水性、气体渗透性和离子电导率——仍被保留。在h2o2溶液中的加速老化试验证明了溶胶-凝胶（SG）相减轻氧化降解的能力，从而显着提高了膜的耐久性。

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